MAX232CSE+T

Click here for production status of specific part numbers. MAX220–MAX249 +5V-Powered, Multichannel RS-232 Drivers/Receivers General Description The MAX220–MAX249 family of line drivers/receivers is intended for all EIA/TIA-232E and V.28/V.24 communications interfaces, particularly applications where ±12V is not available. The MAX225, MAX233, MAX235, and MAX245/MAX246/ MAX247 use no external components and are recommended for applications where printed circuit board space is critical. The MAX220-MAX249 are offered in 26 different packages with temperatures from 0 to +70°C up to -55°C to +125°C. See ordering information table at the end of the data sheet for all package and temperature options. Benefits and Features Saves Board Space ●● Integrated Charge Pump Circuitry • Eliminates the Need for a Bipolar ±12V Supply • Enables Single Supply Operation from +5V Supply ●● Integrated Capacitors (MAX223, MAX233, MAX235, MAX245–MAX247) Saves Power for Reduced Power Requirements ●● 5μW Shutdown Mode Ordering Information and Selection Table appears at end of data sheet. Applications ●● Interface Translation ●● Multidrop RS-232 Networks ●● Portable Diagnostics Equipment AutoShutdown and UCSP are trademarks of Maxim Integrated Products, Inc. MAX220/MAX232/MAX232A Pin Configuration and Typical Operating Circuit +5V INPUT TOP VIEW C5 C1+ 1 + 16 VCC V+ 2 15 GND C1- 3 14 T1OUT C2+ 4 C2- 5 MAX220 MAX232 MAX232A C1 C2 T2OUT 7 10 T2IN 9 R2OUT TTL/CMOS INPUTS DIP/SO DEVICE MAX220 MAX232 MAX232A CAPACITANCE (µF) C1 C2 C3 C4 C5 0.047 0.33 0.33 0.33 0.33 1.0 1.0 1.0 1.0 1.0 0.1 0.1 0.1 0.1 0.1 C1+ +5V 400kΩ 11 T1IN 12 R1OUT 11 T1IN 16 VCC V+ 2 +10V +5V TO +10V 3 C1VOLTAGE DOUBLER 4 6 -10V C2+ +10V TO -10V V5 C2- VOLTAGE INVERTER C4 1 13 R1IN V- 6 R2IN 8 T1OUT 14 +5V 400kΩ 10 T2IN T2OUT 7 12 R1OUT TTL/CMOS OUTPUTS RS-232 OUTPUTS R1IN 13 5kΩ R2IN 8 9 R2OUT 5kΩ GND 19-4323; Rev 18; 5/19 C3 15 RS-232 INPUTS MAX220–MAX249 +5V-Powered, Multichannel RS-232 Drivers/Receivers Absolute Maximum Ratings—MAX220/222/232A/233A/242/243 16-Pin Narrow SO (derate 8.70mW/°C above +70°C).....696mW 16-Pin Wide SO (derate 9.52mW/°C above +70°C)........762mW 18-Pin Wide SO (derate 9.52mW/°C above +70°C)........762mW 20-Pin Wide SO (derate 10.00mW/°C above +70°C)......800mW 20-Pin SSOP (derate 8.00mW/°C above +70°C).............640mW 16-Pin CERDIP (derate 10.00mW/°C above +70°C).......800mW 18-Pin CERDIP (derate 10.53mW/°C above +70°C).......842mW Operating Temperature Ranges MAX2_ _AC_ _, MAX2_ _C_ _...........................0°C to +70°C MAX2_ _AE_ _, MAX2_ _E_ _....................... -40°C to +85°C MAX2_ _AM_ _, MAX2_ _M_ _.................... -55°C to +125°C Storage Temperature Range............................. -65°C to +160°C Lead Temperature (soldering, 10s).................................. +300°C Soldering Temperature (reflow) 20 PDIP (P20M+1).......................................................+225°C All other lead(Pb)-free packages..................................+260°C All other packages containing lead(Pb)........................ +240°C (Voltages referenced to GND.) VCC...........................................................................-0.3V to +6V V+ (Note 1)................................................. (VCC - 0.3V) to +14V V- (Note 1)..............................................................+0.3V to -14V Input Voltages TIN.......................................................... -0.3V to (VCC - 0.3V) RIN (Except MAX220)......................................................±30V RIN (MAX220)..................................................................±25V TOUT (Except MAX220) (Note 2)....................................±15V TOUT (MAX220)............................................................±13.2V Output Voltages TOUT................................................................................±15V ROUT..................................................... -0.3V to (VCC + 0.3V) Driver/Receiver Output Short Circuited to GND.........Continuous Continuous Power Dissipation (TA = +70°C) 16-Pin Plastic DIP (derate 10.53mW/°C above+70°C)....842mW 18-Pin Plastic DIP (derate 11.11mW/°C above +70°C)....889mW 20-Pin Plastic DIP (derate 8.00mW/°C above +70°C).....440mW Note 1: For the MAX220, V+ and V- can have a maximum magnitude of 7V, but their absolute difference cannot exceed 13V. Note 2: Input voltage measured with TOUT in high-impedance state, VSHDN or VCC = 0V. Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability. Electrical Characteristics—MAX220/222/232A/233A/242/243 (VCC = +5V ±10%, C1–C4 = 0.1μF‚ MAX220, C1 = 0.047μF, C2–C4 = 0.33μF, TA = TMIN to TMAX‚ unless otherwise noted.) (Note 3) PARAMETER CONDITIONS MIN TYP MAX UNITS RS-232 TRANSMITTERS Output Voltage Swing All transmitter outputs loaded with 3kΩ to GND ±5 Input Logic-Low Voltage Input Logic-High Voltage All devices except MAX220 MAX220: VCC = +5.0V 2 Output Leakage Current V 0.8 1.4 5 40 VSHDN = 0V, MAX222/MAX242, shutdown, MAX220 ±0.01 ±1 VCC = +5.5V, VSHDN = 0V, VOUT = ±15V, MAX222/ MAX242 ±0.01 ±10 ±0.01 ±10 VCC = VSHDN = 0V Data Rate VOUT = ±15V MAX220, VOUT = ±12V Transmitter Output Resistance VCC = V+ = V- = 0V, VOUT = ±2V Output Short-Circuit Current VOUT = 0V VOUT = 0V V V 2.4 All except MAX220, normal operation Logic Pullup/lnput Current ±8 1.4 µA µA ±25 200 300 10M ±7 ±22 MAX220 116 kbps Ω ±60 mA RS-232 RECEIVERS ±30 RS-232 Input Voltage Operating Range MAX220 RS-232 Input Threshold Low VCC = +5V RS-232 Input Threshold High VCC = +5V www.maximintegrated.com ±25 All except MAX243 R2IN 0.8 MAX243 R2IN (Note 4) -3 1.3 V V All except MAX243 R2IN 1.8 2.4 MAX243 R2IN (Note 4) -0.5 -0.1 V Maxim Integrated │  2 MAX220–MAX249 +5V-Powered, Multichannel RS-232 Drivers/Receivers Electrical Characteristics—MAX220/222/232A/233A/242/243 (continued) (VCC = +5V ±10%, C1–C4 = 0.1μF‚ MAX220, C1 = 0.047μF, C2–C4 = 0.33μF, TA = TMIN to TMAX‚ unless otherwise noted.) (Note 3) PARAMETER RS-232 Input Hysteresis RS-232 Input Resistance TTL/CMOS Output Voltage Low TTL/CMOS Output Voltage High TTL/CMOS Output Short-Circuit Current TTL/CMOS Output Leakage Current CONDITIONS All except MAX220/MAX243, VCC = +5V, no hysteresis in shutdown MIN TYP MAX 0.2 0.5 1.0 MAX220 0.3 MAX243 1 TA = +25°C (MAX220) 3 5 7 5 7 0.2 0.4 IOUT = 1.6mA (MAX220) IOUT = -1.0mA Sourcing VOUT = VGND Sinking VOUT = VCC 0.4 3.5 VCC 0.2 -2 -10 10 30 VSHDN = VCC or VEN = VCC (VSHDN = 0V for MAX222), 0V ≤ VOUT ≤ VCC EN Input Threshold Low MAX242 EN Input Threshold High MAX242 2.0 Supply Voltage Range VCC Supply Current (VSHDN = VCC), Figures 5, 6, 11, 19 3kΩ load both inputs V V mA ±10 µA 1.4 0.8 V 1.4 V 5.5 0.5 2 MAX222/MAX232A/MAX233A/ MAX242/MAX243 4 10 MAX220 12 MAX222/MAX232A/MAX233A/ MAX242/MAX243 15 TA = +25°C V mA 0.1 10 TA = 0°C to +70°C 2 50 2 50 TA = -55°C to +125°C 35 100 ±1 µA 1.4 0.8 V Shutdown Supply Current MAX222/ MAX242 SHDN Input Leakage Current MAX222/MAX242 SHDN Threshold Low MAX222/MAX242 SHDN Threshold High MAX222/MAX242 Transition Slew Rate MAX222/MAX232A/ CL = 50pF to 2500pF, RL = 3kΩ to 7kΩ, VCC MAX233/MAX242/MAX243 = +5V, TA = +25°C, measured from +3V to MAX220 -3V or -3V to +3V TA = -40°C to +85°C tPHLT, Figure 1 Transmitter Propagation Delay TLL to RS-232 (Normal Operation) tPLHT, Figure 1 www.maximintegrated.com kΩ ±0.05 4.5 MAX220 No load V 3 IOUT = 3.2mA UNITS MAX222/MAX232A/ MAX233/MAX242/MAX243 MAX220 MAX222/MAX232A/ MAX233/MAX242/MAX243 MAX220 2.0 1.4 6 12 µA V 30 V/µs 1.5 3 30.0 1.3 3.5 4 10 1.5 3.5 5 10 µs Maxim Integrated │  3 MAX220–MAX249 +5V-Powered, Multichannel RS-232 Drivers/Receivers Electrical Characteristics—MAX220/222/232A/233A/242/243 (continued) (VCC = +5V ±10%, C1–C4 = 0.1μF‚ MAX220, C1 = 0.047μF, C2–C4 = 0.33μF, TA = TMIN to TMAX‚ unless otherwise noted.) (Note 3) PARAMETER CONDITIONS MIN TYP MAX tPHLR, Figure 2 MAX222/MAX232A/MAX233/ MAX242/MAX243 0.5 1 MAX220 0.6 3 tPLHR, Figure 2 MAX222/MAX232A/MAX233/ MAX242/MAX243 0.6 1 MAX220 0.8 3 MAX242 0.5 10 MAX242 2.5 10 Receiver Propagation Delay RS-232 to TLL (Normal Operation) Receiver Propagation Delay RS-232 to TLL tPHLS, Figure 2 (Shutdown) tPHLS, Figure 2 UNITS µs µs tER MAX242, Figure 3 125 500 ns Receiver-Output Disable Time tDR MAX242, Figure 3 160 500 ns Transmitter-Output Enable Time (SHDN Goes High) tET MAX222/MAX242, 0.1µF caps (includes charge-pump startup), Figure 4 250 µs Transmitter-Output Disable Time (SHDN Goes Low) tDT MAX222/MAX242, 0.1µF caps, Figure 4 600 ns Transmitter + to - Propagation Delay Difference (Normal Operation) tPHLT - tPLHT MAX222/MAX232A/MAX233/ MAX242/MAX243 300 MAX220 2000 Receiver + to - Propagation Delay Difference (Normal Operation) tPHLR - tPLHR MAX222/MAX232A/MAX233/ MAX242/MAX243 100 MAX220 225 Receiver-Output Enable Time ns ns Note 3: All units are production tested at hot. Specifications over temperature are guaranteed by design. Note 4: MAX243 R2OUT is guaranteed to be low when R2IN ≥ 0V or is unconnected. Typical Operating Characteristics MAX220/MAX222/MAX232A/MAX233A/MAX242/MAX243 -2 V- LOADED, NO LOAD ON V+ 2 0.1µF 1µF 0.1µF -4 -6 ALL CAPS 1µF 9 VCC = +5.25V 8 ALL CAPS 0.1µF 7 VCC = +4.75V 6 +5V +5V V+ LOADED, NO LOAD ON V0 5 10 15 LOAD CURRENT (mA) www.maximintegrated.com 20 25 4 10 20 30 40 50 60 V+ 0.1µF CAPS SHDN 0V 1µF CAPS V0 1µF CAPS MAX220-03 V+ 0V 5 -8 -10 10 +10V V+, V- VOLTAGE (V) OUTPUT VOLTAGE (V) 0 VCC = +5V NO LOAD ON TRANSMITTER OUTPUTS (EXCEPT MAX220, MAX233A) 4 OUTPUT LOAD CURRENT FLOWS FROM V+ TO V- MAX222/MAX242 ON-TIME EXITING SHUTDOWN MAX220-02 EITHER V+ OR V- LOADED 6 11 MAX220-01 1µF 8 OUTPUT CURRENT (mA) 10 AVAILABLE OUTPUT CURRENT vs. DATA RATE OUTPUT VOLTAGE vs. LOAD CURRENT -10V 0.1µF CAPS V- 500ms/div DATA RATE (kb/s) Maxim Integrated │  4 MAX220–MAX249 +5V-Powered, Multichannel RS-232 Drivers/Receivers Absolute Maximum Ratings—MAX223/MAX230–MAX241 (Voltages referenced to GND.) VCC...........................................................................-0.3V to +6V V+............................................................... (VCC - 0.3V) to +14V V- ............................................................................+0.3V to -14V Input Voltages TIN......................................................... -0.3V to (VCC + 0.3V) RIN...................................................................................±30V Output Voltages TOUT................................................(V+ + 0.3V) to (V- - 0.3V) ROUT..................................................... -0.3V to (VCC + 0.3V) Short-Circuit Duration, TOUT to GND........................Continuous Continuous Power Dissipation (TA = +70°C) 14-Pin Plastic DIP (derate 10.00mW/°C above +70°C)....800mW 16-Pin Plastic DIP (derate 10.53mW/°C above +70°C)....842mW 20-Pin Plastic DIP (derate 11.11mW/°C above +70°C).....889mW 24-Pin Narrow Plastic DIP (derate 13.33mW/°C above +70°C)...............................1.07W 24-Pin Plastic DIP (derate 9.09mW/°C above +70°C).500mW 16-Pin Wide SO (derate 9.52mW/°C above +70°C)....762mW 20-Pin Wide SO (derate 10.00mW/°C above +70°C)..800mW 24-Pin Wide SO (derate 11.76mW/°C above +70°C)...941mW 28-Pin Wide SO (derate 12.50mW/°C above +70°C).........1W 44-Pin Plastic FP (derate 11.11mW/°C above +70°C).889mW 14-Pin CERDIP (derate 9.09mW/°C above +70°C).....727mW 16-Pin CERDIP (derate 10.00mW/°C above +70°C)...800mW 20-Pin CERDIP (derate 11.11mW/°C above +70°C)....889mW 24-Pin Narrow CERDIP (derate 12.50mW/°C above +70°C)....................................1W 24-Pin Sidebraze (derate 20.0mW/°C above +70°C)......... 1.6W 28-Pin SSOP (derate 9.52mW/°C above +70°C)..............762mW Operating Temperature Ranges MAX2 _ _ C _ _...................................................0°C to +70°C MAX2 _ _ E _ _............................................... -40°C to +85°C MAX2 _ _ M _ _............................................ -55°C to +125°C Storage Temperature Range............................. -65°C to +160°C Lead Temperature (soldering, 10s).................................. +300°C Soldering Temperature (reflow) 20 PDIP (P20M+1).......................................................+225°C 24 PDIP (P24M-1)........................................................ +225°C All other lead(Pb)-free packages..................................+260°C All other packages containing lead(Pb)........................ +240°C Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability. Electrical Characteristics—MAX223/MAX230–MAX241 (MAX223/230/232/234/236/237/238/240/241, VCC = +5V ±10%; MAX233/MAX235, VCC = +5V ±5%‚ C1–C4 = 1.0μF; MAX231/MAX239, VCC = +5V ±10%; V+ = +7.5V to +13.2V; TA = TMIN to TMAX; unless otherwise noted.) (Note 5) PARAMETER Output Voltage Swing VCC Supply Current CONDITIONS All transmitter outputs loaded with 3kΩ to ground No load, TA = +25°C V+ Supply Current MIN TYP ±5.0 ±7.3 5 10 MAX223/230/234–238/240/241 7 15 MAX231/239 0.4 1 MAX231 1.8 5 MAX239 5 15 MAX223 15 50 MAX230/235/236/240/241 1 10 TA = +25°C Input Logic-Low Voltage TIN, EN, SHDN (MAX233); EN, SHDN (MAX230/235–241) 0.8 TIN 2.0 Input Logic-High Voltage EN, SHDN (MAX223); EN, SHDN (MAX230/235/236/240/241) 2.4 Logic Pullup Current VTIN = 0V www.maximintegrated.com mA mA µA V V 1.5 -30 UNITS V MAX232/233 Shutdown Supply Current Receiver Input Voltage Operating Range MAX 200 µA +30 V Maxim Integrated │  5 MAX220–MAX249 +5V-Powered, Multichannel RS-232 Drivers/Receivers Electrical Characteristics—MAX223/MAX230–MAX241 (continued) (MAX223/230/232/234/236/237/238/240/241, VCC = +5V ±10%; MAX233/MAX235, VCC = +5V ±5%‚ C1–C4 = 1.0μF; MAX231/MAX239, VCC = +5V ±10%; V+ = +7.5V to +13.2V; TA = TMIN to TMAX; unless otherwise noted.) (Note 5) PARAMETER RS-232 Input Logic-Low Voltage RS-232 Input Logic-High Voltage CONDITIONS TA = +25°C, VCC = +5V TA = +25°C, VCC = +5V MIN TYP Normal operation VSHDN = +5V (MAX223) VSHDN = 0V (MAX235/236/240/241) 0.8 1.2 Shutdown (MAX223) VSHDN = 0V, VEN = +5V (R4IN, R5IN) 0.6 MAX V 1.5 Normal operation VSHDN = 5V (MAX223) VSHDN = 0V (MAX235/236/240/241) 1.7 Shutdown (MAX223) VSHDN = 0V, VEN = +5V (R4IN‚ R5IN) 1.5 2.4 0.2 0.5 1.0 V 3 5 7 kΩ 0.4 V 2.4 V RS-232 Input Hysteresis VCC = +5V, no hysteresis in shutdown RS-232 Input Resistance TA = +25°C, VCC = +5V TTL/CMOS Output Voltage Low IOUT = 1.6mA (MAX231/232/233, IOUT = 3.2mA) TTL/CMOS Output Voltage High IOUT = -1mA TTL/CMOS Output Leakage Current 0V ≤ ROUT ≤ VCC; VEN = 0V (MAX223); VEN = VCC (MAX235–241) Receiver Output Enable Time Normal operation MAX223 600 MAX235/236/239/240/241 400 Receiver Output Disable Time Normal operation MAX223 900 MAX235/236/239/240/241 250 Normal operation 0.5 10 Propagation Delay RS-232 IN to TTL/CMOS OUT, CL = 150pF tPHLS 4 40 tPLHS 6 40 5.1 30 Transition Region Slew Rate Transmitter Output Resistance Transmitter Output Short-Circuit Current UNITS 3.5 VSHDN = 0V (MAX223) MAX223/MAX230/MAX234–241, TA = +25°C, VCC = +5V, RL = 3kΩ to 7kΩ‚ CL = 50pF to 2500pF, measured from +3V to -3V or -3V to +3V ±0.05 3 V ±10 µA ns ns µs V/μs MAX231/MAX232/MAX233, TA = +25°C, VCC = +5V, RL = 3kΩ to 7kΩ, CL = 50pF to 2500pF, measured from +3V to -3V or -3V to +3V VCC = V+ = V- = 0V, VOUT = ±2V VCC - 0.4 4 300 30 Ω ±10 mA Note 5: All units are production tested at hot except for the MAX240, which is production tested at TA = +25°C. Specifications over temperature are guaranteed by design. www.maximintegrated.com Maxim Integrated │  6 MAX220–MAX249 +5V-Powered, Multichannel RS-232 Drivers/Receivers Typical Operating Characteristics MAX223/MAX230–MAX241 TRANSMITTER OUTPUT VOLTAGE (VOH) vs. LOAD CAPACITANCE AT DIFFERENT DATA RATES 7.2 3 TRANSMITTERS LOADED TA = +25°C C1–C4 = 1µF TRANSMITTER 4 TRANSMITTERS LOADS = LOADED 3kΩ || 2500pF 5.0 6.6 6.4 6.2 6.0 5.5 VCC (V) -6.5 TA = +25°C C1–C4 = 1µF TRANSMITTER LOADS = 3kΩ || 2500pF -7.5 -8.0 1 TRANSMITTER LOADED 2 TRANSMITTERS LOADED -8.5 -9.0 4.5 -6.0 -6.4 -6.6 4.0 1500 2500 2000 3 TRANSMITTERS LOADED 4 TRANSMITTERS LOADED 500 0 -6.8 3 TRANSMITTERS LOADED -7.2 5.0 -7.6 1500 2000 2500 10 TRANSMITTER OUTPUT VOLTAGE (V+, V-) vs. LOAD CURRENT 8 6 TA = +25°C VCC = +5V C1–C4 = 1µF V- LOADED, V+ AND VNO LOAD EQUALLY ON V+ LOADED 2 0 -2 V+ LOADED, NO LOAD ON V- -4 -6 -8 -7.4 5.5 1000 LOAD CAPACITANCE (pF) 4 160kb/s 80kb/s 20kb/s -7.0 VCC (V) 1000 7.0 5.0 TA = +25°C VCC = +5V 3 TRANSMITTERS LOADED RL = 3kΩ C1–C4 = 1µF -6.2 VOL (V) VOL (V) -7.0 500 2 TRANSMITTERS LOADED 8.0 6.0 TRANSMITTER OUTPUT VOLTAGE (VOL) vs. LOAD CAPACITANCE AT DIFFERENT DATA RATES MAX220-07 4 TRANSMITTERS LOADED 0 9.0 LOAD CAPACITANCE (pF) TRANSMITTER OUTPUT VOLTAGE (VOL) vs. VCC -6.0 TA = +25°C VCC = +5V 3 TRANSMITTERS LOADED RL = 3kΩ C1–C4 = 1µF 10.0 MAX220-09 4.5 160kb/s 80kb/s 20kb/s MAX220-08 7.0 6.8 1 TRANSMITTER LOADED TA = +25°C VCC = +5V LOADED, RL = 3kΩ C1–C4 = 1µF 11.0 SLEW RATE (V/µs) 1 TRANSMITTER LOADED 7.5 6.5 7.0 VOH (V) VOH (V) 8.0 12.0 MAX220-06 7.4 MAX220-05 2 TRANSMITTERS LOADED TRANSMITTER SLEW RATE vs. LOAD CAPACITANCE V+, V- (V) 8.5 MAX220-04 TRANSMITTER OUTPUT VOLTAGE (VOH) vs. VCC -10 0 500 1000 1500 2500 2000 LOAD CAPACITANCE (pF) ALL TRANSMITTERS UNLOADED 0 5 10 15 20 25 30 35 40 45 50 CURRENT (mA) V+, V- WHEN EXITING SHUTDOWN (1µF CAPACITORS) MAX220-13 V+ O V- VSHDN* 500ms/div *SHUTDOWN POLARITY IS REVERSED FOR NON MAX241 PARTS www.maximintegrated.com Maxim Integrated │  7 MAX220–MAX249 +5V-Powered, Multichannel RS-232 Drivers/Receivers Absolute Maximum Ratings—MAX225/MAX244–MAX249 Continuous Power Dissipation (TA = +70°C) 28-Pin Wide SO (derate 12.50mW/°C above +70°C).........1W 40-Pin Plastic DIP (derate 11.11mW/°C above +70°C).611mW 44-Pin PLCC (derate 13.33mW/°C above +70°C).........1.07W Operating Temperature Ranges MAX225C_ _, MAX24_C_ _................................0°C to +70°C MAX225E_ _, MAX24_E_ _ ........................... -40°C to +85°C Storage Temperature Range............................. -65°C to +160°C Lead Temperature (soldering,10s))..................................+300°C Soldering Temperature (reflow) 40 PDIP (P40M-2)........................................................ +225°C All other lead(Pb)-free packages..................................+260°C All other packages containing lead(Pb)........................ +240°C (Voltages referenced to GND.) Supply Voltage (VCC)...............................................-0.3V to +6V Input Voltages TIN‚ ENA, ENB, ENR, ENT, ENRA, ENRB, ENTA, ENTB.............................. -0.3V to (VCC + 0.3V) RIN...................................................................................±25V TOUT (Note 6)..................................................................±15V ROUT..................................................... -0.3V to (VCC + 0.3V) Short Circuit Duration (one output at a time) TOUT to GND.........................................................Continuous ROUT to GND........................................................Continuous Note 6: Input voltage measured with transmitter output in a high-impedance state, shutdown, or VCC = 0V. Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability. Electrical Characteristics—MAX225/MAX244–MAX249 (MAX225, VCC = +5.0V ±5%; MAX244–MAX249, VCC = +5.0V ±10%, external capacitors C1–C4 = 1μF; TA = TMIN to TMAX; unless otherwise noted.) (Note 7) PARAMETER CONDITIONS MIN TYP MAX UNITS 1.4 0.8 V RS-232 TRANSMITTERS Input Logic-Low Voltage Input Logic-High Voltage 2 Normal operation Logic Pullup/lnput Current Tables 1a–1d Data Rate Tables 1a–1d, normal operation Output Voltage Swing All transmitter outputs loaded with 3kΩ to GND Output Leakage Current (Shutdown) Tables 1a–1d Transmitter Output Resistance Output Short-Circuit Current RS-232 RECEIVERS Shutdown ±5 1.4 V 10 50 ±0.01 ±1 120 64 ±7.5 ±0.01 ±25 VCC = 0V, VOUT = ±15V ±0.01 ±25 VOUT = 0V 10M Ω ±7 ±30 mA ±25 VCC = +5V RS-232 Input Logic-High Voltage VCC = +5V RS-232 Input Hysteresis VCC = +5V RS-232 Input Resistance 1.3 1.8 2.4 V 0.2 0.5 1.0 V 5 7 kΩ 0.2 0.4 V 3 V IOUT = 3.2mA TTL/CMOS Output Voltage High IOUT = -1.0mA 3.5 VCC 0.2 Sourcing VOUT = VGND -2 -10 Sinking VOUT = VCC 10 30 TTL/CMOS Output Leakage Current www.maximintegrated.com Normal operation, outputs disabled, Tables 1a–1d, 0V ≤ VOUT ≤ VCC, VENR_ = VCC V 0.8 TTL/CMOS Output Voltage Low TTL/CMOS Output Short-Circuit Current μA 300 RS-232 Input Voltage Operating Range RS-232 Input Logic-Low Voltage kbps V VENA, VENB, VENT, VENTA, VENTB = VCC, VOUT = ±15V VCC = V+ = V- = 0V, VOUT = ±2V (Note 8) μA V mA ±0.05 ±0.10 μA Maxim Integrated │  8 MAX220–MAX249 +5V-Powered, Multichannel RS-232 Drivers/Receivers Electrical Characteristics—MAX225/MAX244–MAX249 (continued) (MAX225, VCC = +5.0V ±5%; MAX244–MAX249, VCC = +5.0V ±10%, external capacitors C1–C4 = 1μF; TA = TMIN to TMAX; unless otherwise noted.) (Note 7) PARAMETER CONDITIONS MIN TYP MAX MAX225 4.75 5.25 MAX244–MAX249 4.5 5.5 UNITS POWER SUPPLY AND CONTROL LOGIC Supply Voltage Range VCC Supply Current (Normal Operation) Shutdown Supply Current No load 3kΩ loads on all outputs MAX225 10 20 MAX244–MAX249 11 30 MAX225 40 MAX244–MAX249 57 TA = +25°C 8 TA = TMIN to TMAX mA 25 50 Leakage current Control Input V ±1 Logic-low voltage 1.4 Logic-high voltage 2.4 1.4 5 10 0.8 µA V AC CHARACTERISTICS Transition Slew Rate Transmitter Propagation Delay TLL to RS-232 (Normal Operation) CL = 50pF to 2500pF, RL = 3kΩ to 7kΩ, VCC = +5V, TA = +25°C, measured from +3V to -3V or -3V to +3V tPHLT, Figure 1 30 1.3 3.5 tPLHT, Figure 1 1.3 3.5 V/μs µs Receiver Propagation Delay TLL to RS-232 (Normal Operation) tPHLR, Figure 2 0.6 1.5 tPLHR, Figure 2 0.6 1.5 Receiver Propagation Delay TLL to RS-232 (Low-Power Mode) tPHLS, Figure 2 0.6 1.5 tPLHS, Figure 2 0.6 10 Transmitter + to - Propagation Delay Difference (Normal Operation) tPHLT - tPLHT 350 ns Receiver + to - Propagation Delay Difference (Normal Operation) tPHLR - tPLHR 350 ns Receiver-Output Enable Time tER, Figure 3 Receiver-Output Disable Time Transmitter Enable Time Transmitter Disable Time tDR, Figure 3 tET tDT, Figure 4 µs µs 100 500 ns 100 500 ns MAX246–MAX249 (excludes charge-pump startup) 5 µs MAX225/MAX245–MAX249 (includes charge-pump startup) 10 ms 100 ns Note 7: All units production tested at hot. Specifications over temperature are guaranteed by design. Note 8: The 300Ω minimum specification complies with EIA/TIA-232E, but the actual resistance when in shutdown mode or VCC = 0V is 10MΩ as is implied by the leakage specification. www.maximintegrated.com Maxim Integrated │  9 MAX220–MAX249 +5V-Powered, Multichannel RS-232 Drivers/Receivers Typical Operating Characteristics MAX225/MAX244–MAX249 EXTERNAL POWER SUPPLY 1µF CAPACITORS 12 10 40kb/s DATA RATE 8 TRANSMITTERS LOADED WITH 3kΩ 8 6 4 VCC = +5V EXTERNAL CHARGE PUMP 1µF CAPACITORS 8 TRANSMITTERS DRIVING 5kΩ AND 2000pF AT 20kb/s 2 0 -2 -4 4 V- LOADED -8 0 1 2 3 LOAD CAPACITANCE (nF) www.maximintegrated.com 4 5 -10 5 10 15 20 8.0 25 LOAD CURRENT (mA) 30 7.5 40kb/s 7.0 60kb/s 6.5 6.0 V+ LOADED 0 VCC = +5V WITH ALL TRANSMITTERS DRIVEN LOADED WITH 5kΩ 10kb/s 20kb/s 8.5 EITHER V+ OR V- LOADED V+ AND V- LOADED -6 9.0 35 MAX220-12 V+ AND V- LOADED 6 14 2 8 MAX220-11 16 10 MAX220-10 VCC = +5V OUTPUT VOLTAGE (V) TRANSMITTER SLEW RATE (V/µs) 18 TRANSMITTER OUTPUT VOLTAGE (V+, V-) vs. LOAD CAPACITANCE AT DIFFERENT DATA RATES OUTPUT VOLTAGE vs. LOAD CURRENT FOR V+ AND V- V+, V- (V) TRANSMITTER SLEW RATE vs. LOAD CAPACITANCE 5.5 5.0 100kb/s 200kb/s ALL CAPACITIORS 1µF 0 1 2 3 4 5 LOAD CAPACITANCE (nF) Maxim Integrated │  10 MAX220–MAX249 +5V-Powered, Multichannel RS-232 Drivers/Receivers Test Circuits/Timing Diagrams +3V 0V* INPUT +3V INPUT 50% 50% 50% 50% 0V OUTPUT GND V+ 0V V- OUTPUT tPLHT VCC tPLHR tPLHS tPHLR tPHLS tPHLT *EXCEPT FOR R2 ON THE MAX243 WHERE -3V IS USED. Figure 1. Transmitter Propagation-Delay Timing EN RX IN RX a) TEST CIRCUIT EN INPUT RX OUT 1kΩ VCC - 2V Figure 2. Receiver Propagation-Delay Timing SHDN +3V 0V 150pF OUTPUT DISABLE TIME (tDT) +3V 0V EN OUTPUT ENABLE TIME (tER) +5V 0V -5V +3.5V RECEIVER OUTPUTS V+ V- +0.8V a) TIMING DIAGRAM b) ENABLE TIMING +3V EN INPUT EN 0V VOH RECEIVER OUTPUTS VOL 1 OR 0 TX OUTPUT DISABLE TIME (tDR) 3kΩ 50pF VOH - 0.5V VCC - 2V VOL + 0.5V b) TEST CIRCUIT c) DISABLE TIMING Figure 3. Receiver-Output Enable and Disable Timing www.maximintegrated.com Figure 4. Transmitter-Output Disable Timing Maxim Integrated │  11 MAX220–MAX249 +5V-Powered, Multichannel RS-232 Drivers/Receivers Control Pin Configuration Tables Table 1a. MAX245 Control Pin Configurations ENT ENR 0 0 Normal Operation 0 1 1 0 1 1 OPERATION STATUS TRANSMITTERS RECEIVERS All Active All Active Normal Operation All Active All High-Z Shutdown All High-Z All Low-Power Receive Mode Shutdown All High-Z All High-Z Table 1b. MAX245 Control Pin Configurations TRANSMITTERS RECEIVERS ENT ENR OPERATION STATUS TA1–TA4 TB1–TB4 0 0 Normal Operation All Active All Active All Active All Active RA1–RA4 High-Z, RA5 Active RA1–RA5 RB1–RB5 0 1 Normal Operation All Active All Active RA1–RA4 High-Z, RA5 Active 1 0 Shutdown All High-Z All High-Z All Low-Power Receive Mode All Low-Power Receive Mode 1 1 Shutdown All High-Z All High-Z RA1–RA4 High-Z, RA5 Low-Power Receive Mode RA1–RA4 High-Z, RA5 Low-Power Receive Mode Table 1c. MAX246 Control Pin Configurations TRANSMITTERS RECEIVERS ENA ENB OPERATION STATUS TA1–TA4 TB1–TB4 0 0 Normal Operation All Active All Active All Active All Active 0 1 Normal Operation All Active All Active All Active RA1–RA4 High-Z, RA5 Active 1 0 Shutdown All High-Z All High-Z RA1–RA4 High-Z, RA5 Active All Low-Power Receive Mode 1 1 Shutdown All High-Z All High-Z RA1–RA4 High-Z, RA5 Low-Power Receive Mode RA1–RA4 High-Z, RA5 Low-Power Receive Mode www.maximintegrated.com RA1–RA5 RB1–RB5 Maxim Integrated │  12 MAX220–MAX249 +5V-Powered, Multichannel RS-232 Drivers/Receivers Table 1d. MAX247/MAX248/MAX249 Control Pin Configurations TRANSMITTERS ENTA ENTB ENRA ENRB OPERATION STATUS RECEIVERS MAX247 TA1–TA4 TB1–TB4 RA1–RA4 RB1–RB5 MAX248 TA1–TA4 TB1–TB4 RA1–RA4 RB1–RB4 MAX249 TA1–TA3 TB1–TB3 RA1–RA5 RB1–RB5 0 0 0 0 Normal Operation All Active All Active All Active All Active 0 0 0 1 Normal Operation All Active All Active All Active All High-Z, except RB5 stays active on MAX247 0 0 1 0 Normal Operation All Active All Active All High-Z All Active 0 0 1 1 Normal Operation All Active All Active All High-Z All High-Z, except RB5 stays active on MAX247 0 1 0 0 Normal Operation All Active All High-Z All Active All Active 0 1 0 1 Normal Operation All Active All High-Z All Active All High-Z, except RB5 stays active on MAX247 0 1 1 0 Normal Operation All Active All High-Z All High-Z All Active 0 1 1 1 Normal Operation All Active All High-Z All High-Z All High-Z, except RB5 stays active on MAX247 1 0 0 0 Normal Operation All High-Z All Active All Active All Active 1 0 0 1 Normal Operation All High-Z All Active All Active All High-Z, except RB5 stays active on MAX247 1 0 1 0 Normal Operation All High-Z All Active All High-Z All Active 1 0 1 1 Normal Operation All High-Z All Active All High-Z All High-Z, except RB5 stays active on MAX247 1 1 0 0 Shutdown All High-Z All High-Z Low-Power Receive Mode Low-Power Receive Mode 1 1 0 1 Shutdown All High-Z All High-Z Low-Power Receive Mode All High-Z, except RB5 stays active on MAX247 1 1 1 0 Shutdown All High-Z All High-Z All High-Z Low-Power Receive Mode 1 1 1 1 Shutdown All High-Z All High-Z All High-Z All High-Z, except RB5 stays active on MAX247 www.maximintegrated.com Maxim Integrated │  13 MAX220–MAX249 Detailed Description The MAX220–MAX249 contain four sections: dual chargepump DC-DC voltage converters, RS-232 drivers, RS-232 receivers, and receiver and transmitter enable control inputs. Dual Charge-Pump Voltage Converter The MAX220–MAX249 have two internal charge-pumps that convert +5V to ±10V (unloaded) for RS-232 driver operation. The first converter uses capacitor C1 to double the +5V input to +10V on C3 at the V+ output. The second converter uses capacitor C2 to invert +10V to -10V on C4 at the V- output. A small amount of power may be drawn from the +10V (V+) and -10V (V-) outputs to power external circuitry (see the Typical Operating Characteristics section), except on the MAX225 and MAX245–MAX247, where these pins are not available. V+ and V- are not regulated, so the output voltage drops with increasing load current. Do not load V+ and V- to a point that violates the minimum ±5V EIA/TIA-232E driver output voltage when sourcing current from V+ and V- to external circuitry. When using the shutdown feature in the MAX222, MAX225, MAX230, MAX235, MAX236, MAX240, MAX241, and MAX245–MAX249, avoid using V+ and Vto power external circuitry. When these parts are shut down, V- falls to 0V, and V+ falls to +5V. For applications where a +10V external supply is applied to the V+ pin (instead of using the internal charge pump to generate +10V), the C1 capacitor must not be installed and the SHDN pin must be connected to VCC. This is because V+ is internally connected to VCC in shutdown mode. RS-232 Drivers The typical driver output voltage swing is ±8V when loaded with a nominal 5kΩ RS-232 receiver and VCC = +5V. Output swing is guaranteed to meet the EIA/TIA-232E and V.28 specification, which calls for ±5V minimum driver output levels under worst-case conditions. These include a minimum 3kΩ load, VCC = +4.5V, and maximum operating temperature. Unloaded driver output voltage ranges from (V+ -1.3V) to (V- +0.5V). Input thresholds are both TTL and CMOS compatible. The inputs of unused drivers can be left unconnected since 400kΩ input pullup resistors to VCC are built in (except for the MAX220). The pullup resistors force the outputs of unused drivers low because all drivers invert. The internal input pullup resistors typically source 12μA, except in shutdown mode where the pullups are disabled. Driver outputs turn off and enter a high-impedance state—where www.maximintegrated.com +5V-Powered, Multichannel RS-232 Drivers/Receivers leakage current is typically microamperes (maximum 25μA)—when in shutdown mode, in three-state mode, or when device power is removed. Outputs can be driven to ±15V. The powersupply current typically drops to 8μA in shutdown mode. The MAX220 does not have pullup resistors to force the outputs of the unused drivers low. Connect unused inputs to GND or VCC. The MAX239 has a receiver three-state control line, and the MAX223, MAX225, MAX235, MAX236, MAX240, and MAX241 have both a receiver three-state control line and a low-power shutdown control. Table 2 shows the effects of the shutdown control and receiver three-state control on the receiver outputs. The receiver TTL/CMOS outputs are in a high-impedance, three-state mode whenever the three-state enable line is high (for the MAX225/MAX235/MAX236/MAX239– MAX241), and are also high-impedance whenever the shutdown control line is high. When in low-power shutdown mode, the driver outputs are turned off and their leakage current is less than 1μA with the driver output pulled to ground. The driver output leakage remains less than 1μA, even if the transmitter output is backdriven between 0V and (VCC + 6V). Below -0.5V, the transmitter is diode clamped to ground with 1kΩ series impedance. The transmitter is also zener clamped to approximately VCC + 6V, with a series impedance of 1kΩ. The driver output slew rate is limited to less than 30V/ μs as required by the EIA/TIA-232E and V.28 specifications. Typical slew rates are 24V/μs unloaded and 10V/μs loaded with 3Ω and 2500pF. RS-232 Receivers EIA/TIA-232E and V.28 specifications define a voltage level greater than 3V as a logic 0, so all receivers invert. Input thresholds are set at 0.8V and 2.4V, so receivers respond to TTL level inputs as well as EIA/TIA-232E and V.28 levels. Table 2. Three-State Control of Receivers PART SHDN SHDN EN EN(R) RECEIVERS X Low High — High Impedance Active High Impedance MAX223 — Low High High MAX225 — — — Low High High Impedance Active MAX235 MAX236 MAX240 Low Low High — — Low High X High Impedance Active High Impedance Maxim Integrated │  14 MAX220–MAX249 The receiver inputs withstand an input overvoltage up to ±25V and provide input terminating resistors with nominal 5kΩ values. The receivers implement Type 1 interpretation of the fault conditions of V.28 and EIA/TIA-232E. The receiver input hysteresis is typically 0.5V with a guaranteed minimum of 0.2V. This produces clear output transitions with slow-moving input signals, even with moderate amounts of noise and ringing. The receiver propagation delay is typically 600ns and is independent of input swing direction. Low-Power Receive Mode The low-power receive mode feature of the MAX223, MAX242, and MAX245–MAX249 puts the IC into shutdown mode but still allows it to receive information. This is important for applications where systems are periodically awakened to look for activity. Using low-power receive mode, the system can still receive a signal that will activate it on command and prepare it for communication at faster data rates. This operation conserves system power. Negative Threshold—MAX243 The MAX243 is pin compatible with the MAX232A, differing only in that RS-232 cable fault protection is removed on one of the two receiver inputs. This means that control lines such as CTS and RTS can either be driven or left unconnected without interrupting communication. Different cables are not needed to interface with different pieces of equipment. The input threshold of the receiver without cable fault protection is -0.8V rather than +1.4V. Its output goes positive only if the input is connected to a control line that is actively driven negative. If not driven, it defaults to the 0 or “OK to send” state. Normally‚ the MAX243’s other receiver (+1.4V threshold) is used for the data line (TD or RD)‚ while the negative threshold receiver is connected to the control line (DTR‚ DTS‚ CTS‚ RTS, etc.). Other members of the RS-232 family implement the optional cable fault protection as specified by EIA/TIA232E specifications. This means a receiver output goes high whenever its input is driven negative‚ left unconnected‚ or shorted to ground. The high output tells the serial communications IC to stop sending data. To avoid this‚ the control lines must either be driven or connected with jumpers to an appropriate positive voltage level. www.maximintegrated.com +5V-Powered, Multichannel RS-232 Drivers/Receivers Shutdown—MAX222–MAX242 On the MAX222‚ MAX235‚ MAX236‚ MAX240‚ and MAX241‚ all receivers are disabled during shutdown. On the MAX223 and MAX242‚ two receivers continue to operate in a reduced power mode when the chip is in shutdown. Under these conditions‚ the propagation delay increases to about 2.5μs for a high-to-low input transition. When in shutdown, the receiver acts as a CMOS inverter with no hysteresis. The MAX223 and MAX242 also have a receiver output enable input (EN for the MAX242 and EN for the MAX223) that allows receiver output control independent of SHDN (SHDN for MAX241). With all other devices‚ SHDN (SHDN for MAX241) also disables the receiver outputs. The MAX225 provides five transmitters and five receivers‚ while the MAX245 provides ten receivers and eight transmitters. Both devices have separate receiver and transmitter-enable controls. The charge pumps turn off and the devices shut down when a logic high is applied to the ENT input. In this state, the supply current drops to less than 25μA and the receivers continue to operate in a low-power receive mode. Driver outputs enter a highimpedance state (three-state mode). On the MAX225‚ all five receivers are controlled by the ENR input. On the MAX245‚ eight of the receiver outputs are controlled by the ENR input‚ while the remaining two receivers (RA5 and RB5) are always active. RA1–RA4 and RB1–RB4 are put in a three-state mode when ENR is a logic high. Receiver and Transmitter Enable Control Inputs The MAX225 and MAX245–MAX249 feature transmitter and receiver enable controls. The receivers have three modes of operation: full-speed receive (normal active)‚ three-state (disabled)‚ and lowpower receive (enabled receivers continue to function at lower data rates). The receiver enable inputs control the full-speed receive and three-state modes. The transmitters have two modes of operation: full-speed transmit (normal active) and three-state (disabled). The transmitter enable inputs also control the shutdown mode. The device enters shutdown mode when all transmitters are disabled. Enabled receivers function in the low-power receive mode when in shutdown. Maxim Integrated │  15 MAX220–MAX249 Tables 1a–1d define the control states. The MAX244 has no control pins and is not included in these tables. The MAX246 has ten receivers and eight drivers with two control pins, each controlling one side of the device. A logic high at the A-side control input (ENA) causes the four A-side receivers and drivers to go into a three-state mode. Similarly, the B-side control input (ENB) causes the four B-side drivers and receivers to go into a threestate mode. As in the MAX245, one Aside and one B-side receiver (RA5 and RB5) remain active at all times. The entire device is put into shutdown mode when both the A and B sides are disabled (ENA = ENB = +5V). The MAX247 provides nine receivers and eight drivers with four control pins. The ENRA and ENRB receiver enable inputs each control four receiver outputs. The ENTA and ENTB transmitter enable inputs each control four drivers. The ninth receiver (RB5) is always active. The device enters shutdown mode with a logic high on both ENTA and ENTB. +5V-Powered, Multichannel RS-232 Drivers/Receivers The MAX249 provides ten receivers and six drivers with four control pins. The ENRA and ENRB receiver enable inputs each control five receiver outputs. The ENTA and ENTB transmitter enable inputs control three drivers each. There is no always-active receiver. The device enters shutdown mode and transmitters go into a threestate mode with a logic high on both ENTA and ENTB. In shutdown mode, active receivers operate in a low-power receive mode at data rates up to 20kb/s. Applications Information Figures 5 through 25 show pin configurations and typical operating circuits. In applications that are sensitive to power-supply noise, VCC should be decoupled to ground with a capacitor of the same value as C1 and C2 connected as close as possible to the device. The MAX248 provides eight receivers and eight drivers with four control pins. The ENRA and ENRB receiver enable inputs each control four receiver outputs. The ENTA and ENTB transmitter enable inputs control four drivers each. This part does not have an always-active receiver. The device enters shutdown mode and transmitters go into a three-state mode with a logic high on both ENTA and ENTB. www.maximintegrated.com Maxim Integrated │  16 MAX220–MAX249 +5V-Powered, Multichannel RS-232 Drivers/Receivers +5V INPUT TOP VIEW C3 C5 C1+ 1 + 16 VCC V+ 2 C2- 5 C1 15 GND C1- 3 C2+ 4 14 T1OUT MAX220 MAX232 MAX232A C2 13 R1IN +5V 400kΩ 11 T1IN 12 R1OUT V- 6 11 T1IN T2OUT 7 10 T2IN 9 R2IN 8 TTL/CMOS INPUTS R2OUT DIP/SO DEVICE MAX220 MAX232 MAX232A 16 VCC C1+ V+ 2 +10V +5V TO +10V 3 C1VOLTAGE DOUBLER 4 6 -10V C2+ +10V TO -10V V5 C2- VOLTAGE INVERTER C4 1 T1OUT 14 +5V 400kΩ 10 T2IN 12 R1OUT TTL/CMOS OUTPUTS CAPACITANCE (µF) C1 C2 C3 C4 C5 0.047 0.33 0.33 0.33 0.33 1.0 1.0 1.0 1.0 1.0 0.1 0.1 0.1 0.1 0.1 RS-232 OUTPUTS T2OUT 7 R1IN 13 RS-232 INPUTS 5kΩ R2IN 8 9 R2OUT 5kΩ GND 15 Figure 5. MAX220/MAX232/MAX232A Pin Configuration and Typical Operating Circuit +5V INPUT C3 TOP VIEW ALL CAPACITORS = 0.1µF C5 (N.C.) EN 1 (N.C.) EN 1 + 18 SHDN + C1+ 2 19 VCC 17 VCC V+ 3 18 GND V+ 3 16 GND C1- 4 17 T1OUT C1- 4 15 T1OUT C2+ 5 14 R1IN C2- 6 C2- 6 MAX222 MAX242 13 R1OUT MAX222 MAX242 V- 7 16 N.C. 15 R1IN +5V 14 R1OUT 12 T1IN T2OUT 8 13 N.C. T2OUT 8 11 T2IN R2IN 9 12 T1IN 10 R2OUT R2OUT 10 11 T2IN DIP/SO C2 +5V 400kΩ 12 T1IN V- 7 R2IN 9 C1 20 SHDN C1+ 2 C2+ 5 17 VCC 3 +10V C1+ +5V TO +10V V+ 4 C1VOLTAGE DOUBLER 5 C2+ 7 -10V +10V TO -10V V6 C2C4 VOLTAGE INVERTER 2 TTL/CMOS INPUTS 400kΩ 11 T2IN (EXCEPT MAX220) T1OUT 15 (EXCEPT MAX220) T2OUT 8 13 R1OUT TTL/CMOS OUTPUTS SSOP ( ) ARE FOR MAX222 ONLY. PIN NUMBERS IN TYPICAL OPERATING CIRCUIT ARE FOR DIP/SO PACKAGES ONLY. RS-232 OUTPUTS R1IN 14 5kΩ R2IN 9 10 R2OUT 1 (N.C.) EN 5kΩ GND SHDN RS-232 INPUTS 18 16 Figure 6. MAX222/MAX242 Pin Configurations and Typical Operating Circuit www.maximintegrated.com Maxim Integrated │  17 MAX220–MAX249 +5V-Powered, Multichannel RS-232 Drivers/Receivers +5V TOP VIEW 0.1µF 28 +5V VCC 27 VCC 400kΩ ENR 1 + 28 VCC ENR 2 27 VCC T1IN 3 26 ENT T2IN 4 R1OUT 5 T1IN 3 24 T4IN R2OUT 6 23 T5IN R3OUT 7 22 R4OUT R3IN 21 R5OUT 8 R2IN 9 20 R5IN R1IN 10 19 R4IN T1OUT 11 18 T3OUT T2OUT 12 17 T4OUT GND 13 16 T5OUT GND 14 15 T5OUT SO 11 400kΩ T2IN 4 T2OUT +5V 25 T3IN MAX225 T1OUT +5V 12 400kΩ T3IN 25 T3OUT +5V 18 400kΩ T4IN 24 T4OUT +5V 400kΩ T5OUT T5IN 23 ENT 26 T5OUT R1OUT 5 R1IN 17 16 15 10 5kΩ R2OUT 6 R2IN 9 5kΩ MAX225 FUNCTIONAL DESCRIPTION 5 RECEIVERS 5 TRANSMITTERS 2 CONTROL PINS 1 RECEIVER ENABLE (ENR) 1 TRANSMITTER ENABLE (ENT) R3OUT 7 R3IN 8 5kΩ R4OUT 22 R4IN 19 5kΩ R5OUT 21 R5IN 20 5kΩ PINS (ENR, GND, VCC, T5OUT) ARE INTERNALLY CONNECTED. CONNECT EITHER OR BOTH EXTERNALLY. T5OUT IS A SINGLE DRIVER. 1 2 ENR ENR GND 13 GND 14 Figure 7. MAX225 Pin Configuration and Typical Operating Circuit www.maximintegrated.com Maxim Integrated │  18 MAX220–MAX249 +5V-Powered, Multichannel RS-232 Drivers/Receivers TOP VIEW 1.0µF 12 C1+ 1.0µF 14 C115 C2+ 1.0µF 16 C2- +5V INPUT 11 VCC +5V TO +10V VOLTAGE DOUBLER V+ +10V TO -10V VOLTAGE INVERTER V- 13 1.0µF 17 1.0µF +5V 400kΩ T3OUT 1 7 T1IN + 27 R3IN T2OUT 3 26 R3OUT R2IN 4 R2OUT 5 T2IN 6 25 SHDN (SHDN) MAX223 MAX241 T1IN 7 24 EN (EN) 400kΩ 6 T2IN TTL/CMOS INPUTS 23 R4IN* 21 T4IN R1IN 9 20 T3IN GND 10 19 R5OUT* VCC 11 18 R5IN* C1+ 12 17 V- V+ 13 16 C2- C1- 14 15 C2+ Wide SO/ SSOP T2 T2OUT 3 +5V RS-232 OUTPUTS 400kΩ 20 T3IN T3 T3OUT 1 +5V 22 R4OUT* R1OUT 8 T1OUT 2 +5V 28 T4OUT T1OUT 2 T1 400kΩ 21 T4IN 8 R1OUT T4 R1 T4OUT 28 R1IN 9 5kΩ 5 R2OUT R2 R2IN 4 5kΩ LOGIC OUTPUTS 26 R3OUT R3 R3IN 27 5kΩ 22 R4OUT R4 RS-232 INPUTS R4IN 23 5kΩ 19 R5OUT *R4 AND R5 IN MAX223 REMAIN ACTIVE IN SHUTDOWN. NOTE: PIN LABELS IN ( ) ARE FOR MAX241. 24 EN (EN) R5 GND R5IN 18 5kΩ SHDN 25 (SHDN) 10 Figure 8. MAX223/MAX241 Pin Configuration and Typical Operating Circuit www.maximintegrated.com Maxim Integrated │  19 MAX220–MAX249 +5V-Powered, Multichannel RS-232 Drivers/Receivers TOP VIEW T3OUT 1 1.0µF + 20 T4OUT T1OUT 2 19 T5IN T2OUT 3 18 N.C. T2IN 4 T1IN 5 +5V INPUT 1.0µF 1.0µF +5V 15 T4IN VCC 7 14 T3IN C1+ 8 13 V- V+ 9 12 C2- C1- 10 11 C2+ 400kΩ 4 T2IN T2OUT 3 T2 +5V 400kΩ 14 T3IN T3OUT 1 T3 +5V 400kΩ 15 T4IN +5V DIP/SO 1.0µF T1OUT 2 T1 +5V TTL/CMOS INPUTS 1.0µF 400kΩ 5 T1IN 16 T5OUT GND 6 9 11 +10V TO -10V C2+ 13 12 C2- VOLTAGE INVERTER V- 17 SHDN MAX230 7 VCC V+ +5V TO +10V VOLTAGE DOUBLER 8 C1+ 10 C1- T4OUT 20 T4 400kΩ 19 T5IN T5OUT 16 T5 N.C.x 18 GND RS-232 OUTPUTS 17 SHDN 6 Figure 9. MAX230 Pin Configuration and Typical Operating Circuit +5V INPUT TOP VIEW 1 2 1.0µF C+ 1 CV- + 2 3 T2OUT 4 +7.5V TO +12V 1.0µF MAX231 R2IN 5 14 V+ C+ 1 13 VCC C- 2 15 VCC 12 GND V- 3 14 GND 11 T1OUT T2OUT 4 10 R1IN MAX231 9 R1OUT R2OUT 6 T2IN 7 8 T1IN 13 T1OUT (10) 11 R1OUT 10 T1IN N.C. 8 9 N.C. SO V+ V- 14 (16) 3 400kΩ 8 T1IN +5V TTL/CMOS INPUTS C2 1.0µF T1OUT 11 T1 (13) RS-232 OUTPUTS 400kΩ 12 R1IN T2IN 7 C1- VCC +12V TO -12V VOLTAGE CONVERTER +5V 16 V+ R2IN 5 R2OUT 6 DIP + 13 (15) C1+ (11) 7 T2IN 9 R1OUT T2OUT 4 T2 R1IN 10 R1 TTL/CMOS OUTPUTS 5kΩ 6 R2OUT (12) RS-232 INPUTS R2IN 5 R2 5kΩ GND PIN NUMBERS IN ( ) ARE FOR SO PACKAGE. 12 (14) Figure 10. MAX231 Pin Configurations and Typical Operating Circuit www.maximintegrated.com Maxim Integrated │  20 MAX220–MAX249 +5V-Powered, Multichannel RS-232 Drivers/Receivers +5V INPUT 1.0µF TOP VIEW 7 VCC +5V T2IN 400kΩ + 1 T1IN 2 19 R2IN R1OUT 3 18 T2OUT R1IN 4 MAX233 MAX233A GND 6 400kΩ 16 C215 C2+ VCC 7 (V+) C1+ +5V TTL/CMOS INPUTS 17 V- T1OUT 5 14 V+ (C1-) GND 9 12 V- (C2+) (V-) CS- 10 11 C2+ (C2-) DIP/SO T2OUT 18 1 T2IN 3 R1OUT 5kΩ 20 R2OUT 8 (13) DO NOT MAKE CONNECTIONS TO 13 (14) THESE PINS 12 (10) INTERNAL -10V 17 POWER SUPPLY INTERNAL +10V POWER SUPPLY RS-232 OUTPUTS R1IN 4 TTL/CMOS OUTPUTS 13 C1- (C1+) 8 T1OUT 5 T1IN 2 20 R2OUT RS-232 INPUTS R2IN 19 5kΩ C2+ 11 (12) C1+ C1- C2+ V- C2- V14 (8) V+ CSGND 16 10 (11) GND 6 PIN NAMES IN ( ) ARE FOR SO PACKAGE. 15 9 Figure 11. MAX233/MAX233A Pin Configuration and Typical Operating Circuit 1.0µF TOP VIEW 7 1.0µF 9 10 T1OUT 1 + 16 T3OUT T2OUT 2 C1C2+ 11 C2- 12 V- VCC 6 11 C2- C1+ 7 10 C2+ 9 V+ 8 4 T1IN 13 T3IN GND 5 C1- +10V TO -10V VOLTAGE INVERTER 1.0µF V+ V- 8 12 1.0µF 400kΩ 14 T4IN MAX234 6 VCC +5V TO +10V VOLTAGE DOUBLER +5V 15 T4OUT T2IN 3 T1IN 4 1.0µF C1+ +5V INPUT T1 T1OUT 1 T2OUT 2 +5V 400kΩ 3 T2IN T2 +5V TTL/CMOS INPUTS RS-232 OUTPUTS 400kΩ 13 T3IN T3 +5V DIP/SO T3OUT 16 T4OUT 15 400kΩ 14 T4IN T4 GND 5 Figure 12. MAX234 Pin Configuration and Typical Operating Circuit www.maximintegrated.com Maxim Integrated │  21 MAX220–MAX249 +5V-Powered, Multichannel RS-232 Drivers/Receivers TOP VIEW 1.0µF +5V INPUT 12 +5V VCC 400kΩ 8 T1IN +5V T4OUT 1 TTL/CMOS INPUTS + T3OUT 2 23 R3OUT T1OUT 3 22 T5IN T2OUT 4 21 SHDN R2IN 5 MAX235 R2OUT 6 18 R4IN T1IN 8 17 R4OUT R1OUT 9 16 T4IN R1IN 10 15 T3IN GND 11 14 R5OUT VCC 12 13 R5IN DIP T3OUT 2 T4OUT 1 T4 +5V 22 T5IN 9 R1OUT RS-232 OUTPUTS 400kΩ 16 T4IN 19 T5OUT T2IN 7 T2OUT 4 T3 +5V 20 EN T2 400kΩ 15 T3IN 24 R3IN T1OUT 3 400kΩ 7 T2IN +5V T1 400kΩ T5OUT 19 T5 R1IN 10 T1 5kΩ 6 R2OUT R2IN 5 R2 5kΩ TTL/CMOS OUTPUTS 23 R3OUT R3IN 24 R3 5kΩ 17 R4OUT RS-232 INPUTS R4IN 18 R4 5kΩ 14 R5OUT R5IN 13 R5 5kΩ 20 EN GND SHDN 21 11 Figure 13. MAX235 Pin Configuration and Typical Operating Circuit www.maximintegrated.com Maxim Integrated │  22 MAX220–MAX249 +5V-Powered, Multichannel RS-232 Drivers/Receivers TOP VIEW 1.0µF 10 1.0µF 12 13 1.0µF 14 +5V INPUT 9 VCC +5V TO +10V VOLTAGE DOUBLER C1+ C1C2+ C2- 24 T4OUT T1OUT 2 23 R2IN T2OUT 3 22 R2OUT 21 SHDN R1IN 4 R1OUT 5 MAX236 20 EN T2IN 6 19 T4IN T1IN 7 18 T3IN GND 8 17 R3OUT VCC 9 16 R3IN C1+ 10 15 V- V+ 11 14 C2- C1- 12 13 C2+ RS-232 OUTPUTS 400kΩ 18 T3IN T3OUT 1 T3 +5V 19 T4IN 5 R1OUT 1.0µF T2OUT 3 T2 +5V 15 400kΩ 6 T2IN TTL/CMOS INPUTS 1.0µF T1OUT 2 T1 +5V 11 400kΩ 7 T1IN + V- +10V TO -10V VOLTAGE INVERTER +5V T3OUT 1 V+ 400kΩ T4OUT 24 T4 R1IN 4 R1 5kΩ DIP/SO TTL/CMOS OUTPUTS 22 R2OUT R2IN 23 R2 RS-232 INPUTS 5kΩ 17 R3OUT R3IN 16 R3 5kΩ 20 EN GND SHDN 21 8 Figure 14. MAX236 Pin Configuration and Typical Operating Circuit www.maximintegrated.com Maxim Integrated │  23 MAX220–MAX249 +5V-Powered, Multichannel RS-232 Drivers/Receivers TOP VIEW 1.0µF 10 1.0µF 12 13 1.0µF 14 +5V INPUT 9 VCC +5V TO +10V VOLTAGE DOUBLER C1+ C1C2+ 1.0µF V+ V- +10V TO -10V VOLTAGE INVERTER C2- 11 15 1.0µF +5V T3OUT 1 400kΩ + 24 T4OUT T1OUT 2 23 R2IN T2OUT 3 22 R2OUT R1IN 4 R1OUT 5 7 T1IN +5V +5V 20 T5OUT T2IN 6 19 T4IN T1IN 7 18 T3IN GND 8 17 R3OUT VCC 9 16 R3IN C1+ 10 15 V- V+ 11 14 C2- C1- 12 13 C2+ T1OUT 2 T2OUT 3 T3OUT 1 T4OUT 24 T5OUT 20 400kΩ 6 T2IN 21 T5IN MAX237 T1 T2 400kΩ TTL/CMOS INPUTS 18 T3IN +5V T3 RS-232 OUTPUTS 400kΩ 19 T4IN +5V T4 400kΩ 21 T5IN DIP/SO 5 R1OUT T5 R1 R1IN 4 5kΩ TTL/CMOS OUTPUTS 22 R2OUT R2 R2IN 23 5kΩ 17 R3OUT R3 R3IN RS-232 INPUTS 16 5kΩ GND 8 Figure 15. MAX237 Pin Configuration and Typical Operating Circuit www.maximintegrated.com Maxim Integrated │  24 MAX220–MAX249 +5V-Powered, Multichannel RS-232 Drivers/Receivers TOP VIEW 1.0µF 10 1.0µF 12 13 1.0µF 14 +5V INPUT 1.0µF 9 VCC +5V TO +10V VOLTAGE DOUBLER C1+ C1C2+ V+ V- +10V TO -10V VOLTAGE INVERTER C2- 11 15 1.0µF +5V T2OUT 1 400kΩ + 22 R3OUT R2IN 3 18 T2IN 21 T4IN R2OUT 4 MAX238 20 T4OUT R1OUT 6 19 T3IN R1IN 7 18 T2IN GND 8 17 R4OUT VCC 9 16 R4IN C1+ 10 15 V- V+ 11 14 C2- C1- 12 13 C2+ T1 +5V 23 R3IN T1OUT 2 T1IN 5 5 T1IN 24 T3OUT +5V TTL/CMOS INPUTS 19 T3IN +5V T1OUT 2 T2OUT 1 400kΩ T2 RS-232 OUTPUTS 400kΩ T3 T3OUT 24 T4OUT 20 400kΩ 21 T4IN 6 R1OUT T4 R1 R1IN 7 5kΩ DIP/SO 4 R2OUT R2 TTL/CMOS OUTPUTS R2IN 3 RS-232 INPUTS 5kΩ 22 R3OUT R3 R3IN 23 5kΩ 17 R4OUT R4 R4IN 16 5kΩ GND 8 16. MAX238 Pin Configuration and Typical Operating Circuit www.maximintegrated.com Maxim Integrated │  25 MAX220–MAX249 +5V-Powered, Multichannel RS-232 Drivers/Receivers TOP VIEW +7.5V TO +13.2V INPUT +5V INPUT 1.0µF 5 4 6 1.0µF 7 VCC C1+ V+ V- +10V TO -10V VOLTAGE INVERTER C1- 8 1.0µF +5V 400kΩ R1OUT 1 24 T1IN + 23 T2IN GND 3 22 R2OUT 21 R2IN VCC 4 V+ 5 +5V 24 T1IN R1IN 2 MAX239 19 T1OUT C- 7 18 R3IN V- 8 17 R3OUT R5IN 9 16 T3IN R5OUT 10 15 N.C. R4OUT 11 14 EN R4IN 12 TTL/CMOS INPUTS 23 T2IN 19 T2OUT 20 T3OUT 13 400kΩ T2 +5V 16 T3IN 1 R1OUT RS-232 OUTPUTS T3 R1 R1IN 2 5kΩ 22 R2OUT 13 T3OUT DIP/SO T1OUT 400kΩ 20 T2OUT C+ 6 T1 R2 R2IN 21 5kΩ TTL/CMOS OUTPUTS 17 R3OUT R3 R3IN 18 RS-232 INPUTS 5kΩ 11 R4OUT R4 R4IN 12 5kΩ 10 R5OUT R5 14 EN GND R5IN 9 5kΩ 15 N.C. 3 Figure 17. MAX239 Pin Configuration and Typical Operating Circuit www.maximintegrated.com Maxim Integrated │  26 MAX220–MAX249 +5V-Powered, Multichannel RS-232 Drivers/Receivers 1.0µF TOP VIEW 25 19 VCC +5V TO +10V VOLTAGE DOUBLER C1+ 1.0µF 27 C128 C2+ 1.0µF 29 C2- +5V INPUT +5V TO -10V VOLTAGE INVERTER +5V +5V N.C. R2IN N.C. T2OUT T1OUT T3OUT T4OUT R3IN R3OUT T5IN N.C. 11 10 9 8 7 6 5 4 3 2 1 12 13 14 15 16 17 18 19 20 21 22 MAX240 44 43 42 41 40 39 38 37 36 35 34 N.C. SHDN EN T5OUT R4IN R4OUT T4IN T3IN R5OUT R5IN N.C. T2 T3 2 T5IN 16 R1OUT N.C. N.C. C1+ V+ C1C2+ C2 VN.C. N.C. N.C. T1OUT 7 T2OUT 8 T3OUT 6 T4OUT 5 T5OUT 41 R1IN 17 RS-232 OUTPUTS 400kΩ 38 T4IN +5V 1.0µF 400kΩ 37 T3IN +5V 30 400kΩ T4 400kΩ T5 R1 5kΩ 13 R2OUT R2 R2IN 10 5kΩ 23 24 25 26 27 28 29 30 31 32 33 N.C. R2OUT T2IN T1IN R1OUT R1IN GND VCC N.C. N.C. N.C. + T1 14 T2IN +5V V- 1.0µF 400kΩ 15 T1IN TTL/CMOS INPUTS V+ 26 TTL/CMOS OUTPUTS Plastic FP 3 R3OUT R3 R3IN 4 5kΩ 39 R4OUT R4 RS-232 INPUTS R4IN 40 5kΩ 36 R5OUT 42 EN R5 R5IN 35 5kΩ GND SHDN 43 18 Figure 18. MAX240 Pin Configuration and Typical Operating Circuit www.maximintegrated.com Maxim Integrated │  27 MAX220–MAX249 +5V-Powered, Multichannel RS-232 Drivers/Receivers TOP VIEW 0.1µF 1 0.1µF C1+ 1 + V+ 2 15 GND 14 T1OUT C2+ 4 4 16 VCC C1- 3 MAX243 0.1µF C2+ C2- 16 VCC +5V TO +10V VOLTAGE DOUBLER 11 T1IN T2OUT 7 10 T2IN 9 +10V 6 -10V 0.1µF T1OUT 14 +5V TTL/CMOS INPUTS RS-232 OUTPUTS 400kΩ T2OUT 7 10 T2IN R2OUT R1IN 13 12 R1OUT TTL/CMOS OUTPUTS 5kΩ 9 R2OUT R1 OUTPUT HIGH HIGH LOW V- 2 400kΩ 11 T1IN DIP/SO RECEIVER INPUT ≤ -3V OPEN ≥ +3V V+ +10V TO -10V VOLTAGE INVERTER 13 R1IN V- 6 R2IN 8 5 C1- 0.1µF +5V 12 R1OUT C2- 5 3 C1+ +5V INPUT R2 OUTPUT HIGH LOW LOW RS-232 INPUTS R2IN 8 5kΩ GND 15 Figure 19. MAX243 Pin Configuration and Typical Operating Circuit www.maximintegrated.com Maxim Integrated │  28 MAX220–MAX249 +5V-Powered, Multichannel RS-232 Drivers/Receivers +5V TOP VIEW 1µF 1µF 20 VCC +5V TO +10V VOLTAGE DOUBLER 2 1 1µF RB5IN TA1OUT 3 TB4OUT TA2OUT 4 TB3OUT TA3OUT 5 TB2OUT TA4OUT 6 TB1OUT RA4IN RA5IN 21 1µF 44 43 42 41 40 RA3IN 7 39 RB4IN RA2IN 8 38 RB3IN RA1IN 9 37 RB2IN RA1OUT 10 36 RB1IN RA2OUT 11 35 RB1OUT RA3OUT 12 RA4OUT 13 33 RB3OUT RA5OUT 14 32 RB4OUT TA1IN 15 31 RB5OUT TA2IN 16 30 TB1IN TA3IN 17 29 TB2IN MAX244 TB3IN TB4IN V- C2- C2+ C1- V+ C1+ VCC 19 20 21 22 23 24 25 26 27 28 GND TA4IN 34 RB2OUT PLCC +5V 400kΩ 15 TA1IN 2 TA2OUT 400kΩ 26 V- 1µF 400kΩ 17 TA3IN 4 TA4OUT 18 TA4IN +5V 9 RA1IN TB3OUT 42 TB4OUT 41 TB4IN 27 RB1IN 36 5kΩ 5kΩ 10 RA1OUT RB1OUT 35 RB2IN 37 5kΩ 5kΩ 11 RA2OUT RB2OUT 34 7 RA3IN RB3IN 38 5kΩ 5kΩ 12 RA3OUT RB3OUT 33 6 RA4IN RB4IN 39 5kΩ 5kΩ 13 RA4OUT RB4OUT 32 5 RA5IN RB5IN 40 5kΩ 5kΩ 14 RA5OUT TB2OUT 43 TB3IN 28 +5V 400kΩ TB1OUT 44 TB2IN 29 +5V +5V 22 TB1IN 30 +5V +5V 16 TA2IN 3 TA3OUT +5V 8 RA2IN MAX249 FUNCTIONAL DESCRIPTION 10 RECEIVERS 5 A-SIDE RECEIVERS 5 B-SIDE RECEIVERS 8 TRANSMITTERS 4 A-SIDE TRANSMITTERS 4 B-SIDE TRANSMITTERS NO CONTROL PINS V+ +10V TO -10V VOLTAGE INVERTER 2 TA1OUT + 18 C1+ 23 C124 C2+ 25 C2- GND 19 RB5OUT 31 Figure 20. MAX244 Pin Configuration and Typical Operating Circuit www.maximintegrated.com Maxim Integrated │  29 MAX220–MAX249 +5V-Powered, Multichannel RS-232 Drivers/Receivers +5V TOP VIEW 1µF ENR 1 + 40 VCC TA1IN 2 39 ENT TA2IN 3 38 TB1IN TA3IN 4 37 TB2IN TA4IN 5 36 TB3IN RA5OUT 6 35 TB4IN RA4OUT 7 34 RB5OUT RA3OUT 8 33 RB4OUT RA2OUT 9 32 RB3OUT RA1OUT 10 31 RB2OUT RA1IN 11 30 RB1OUT RA2IN 12 29 RB1IN RA3IN 13 28 RB2IN RA4IN 14 27 RB3IN RA5IN 15 26 RB4IN TA1OUT 16 25 RB5IN TA2OUT 17 24 TB1OUT TA3OUT 18 23 TB2OUT TA4OUT 19 22 TB3OUT GND 20 21 TB4OUT MAX245 16 TA1OUT +5V 40 VCC 17 TA2OUT +5V +5V TB2OUT 23 400kΩ 3 TA2IN 18 TA3OUT TB2IN 37 +5V +5V TB3OUT 22 400kΩ TB3IN 36 4 TA3IN 19 TA4OUT 5 TA4IN +5V +5V 400kΩ TB4OUT 21 TB4IN 35 1 ENR ENT 39 11 RA1IN RB1IN 29 5kΩ 5kΩ 10 RA1OUT RB1OUT 30 12 RA2IN RB2IN 28 5kΩ 5kΩ RB2OUT 31 13 RA3IN RB3IN 27 5kΩ 5kΩ MAX245 FUNCTIONAL DESCRIPTION 10 RECEIVERS 5 A-SIDE RECEIVERS (RA5 ALWAYS ACTIVE) 5 B-SIDE RECEIVERS (RB5 ALWAYS ACTIVE) 8 TRANSMITTTERS 4 A-SIDE TRANSMITTERS 2 CONTROL PINS 1 RECEIVER ENABLE (ENR) 1 TRANSMITTER ENABLE (ENT) TB1OUT 24 TB1IN 38 2 TA1IN 9 RA2OUT DIP +5V 400kΩ 8 RA3OUT RB3OUT 32 14 RA4IN RB4IN 26 5kΩ 5kΩ 7 RA4OUT RB4OUT 33 15 RA5IN RB5IN 25 5kΩ 5kΩ 6 RA5OUT RB5OUT 34 GND 20 Figure 21. MAX245 Pin Configuration and Typical Operating Circuit www.maximintegrated.com Maxim Integrated │  30 MAX220–MAX249 +5V-Powered, Multichannel RS-232 Drivers/Receivers +5V TOP VIEW 1µF + 40 VCC 2 39 ENB TA2IN 3 38 TB1IN TA3IN 4 37 TB2IN TA4IN 5 36 TB3IN RA5OUT 6 35 TB4IN RA4OUT 7 34 RB5OUT RA3OUT 8 33 RB4OUT ENA 1 TA1IN MAX246 RA2OUT 9 32 RB3OUT RA1OUT 10 31 RB2OUT RA1IN 11 30 RB1OUT RA2IN 12 29 RB1IN RA3IN 13 28 RB2IN RA4IN 14 27 RB3IN RA5IN 15 26 RB4IN TA1OUT 16 25 RB5IN TA2OUT 17 24 TB1OUT TA3OUT 18 23 TB2OUT TA4OUT 19 22 TB3OUT GND 20 21 TB4OUT DIP MAX246 FUNCTIONAL DESCRIPTION 10 RECEIVERS 5 A-SIDE RECEIVERS (RA5 ALWAYS ACTIVE) 5 B-SIDE RECEIVERS (RB5 ALWAYS ACTIVE) 8 TRANSMITTERS 4 A-SIDE TRANSMITTERS 4 B-SIDE TRANSMITTERS 2 CONTROL PINS ENABLE A-SIDE (ENA) ENABLE B-SIDE (ENB) 16 TA1OUT 40 VCC +5V +5V TB1OUT 24 400kΩ TB1IN 38 2 TA1IN 17 TA2OUT +5V +5V TB2OUT 23 400kΩ TB2IN 37 3 TA2IN 18 TA3OUT 4 TA3IN 19 TA4OUT +5V +5V 400kΩ +5V +5V TB3OUT 22 TB3IN 36 TB4OUT 21 400kΩ 5 TA4IN TB4IN 35 1 ENA ENB 39 RB1IN 29 11 RA1IN 5kΩ 5kΩ RB1OUT 30 10 RA1OUT RB2IN 28 12 RA2IN 5kΩ 5kΩ 9 RA2OUT RB2OUT 31 RB3IN 27 13 RA3IN 5kΩ 5kΩ RB3OUT 32 8 RA3OUT RB4IN 26 14 RA4IN 5kΩ 5kΩ 7 RA4OUT RB4OUT 33 RB5IN 25 15 RA5IN 5kΩ 6 RA5OUT 5kΩ GND 20 RB5OUT 34 Figure 22. MAX246 Pin Configuration and Typical Operating Circuit www.maximintegrated.com Maxim Integrated │  31 MAX220–MAX249 +5V-Powered, Multichannel RS-232 Drivers/Receivers +5V TOP VIEW 1µF + 40 VCC 2 39 ENTB TA2IN 3 38 TB1IN TA3IN 4 37 TB2IN TA4IN 5 36 TB3IN RB5OUT 6 35 TB4IN RA4OUT 7 34 RB4OUT RA3OUT 8 33 RB3OUT RA2OUT 9 32 RB2OUT RA1OUT 10 31 RB1OUT ENRA 11 30 ENRB RA1IN 12 29 RB1IN RA2IN 13 28 RB2IN RA3IN 14 27 RB3IN RA4IN 15 26 RB4IN TA1OUT 16 25 RB5IN TA2OUT 17 24 TB1OUT TA3OUT 18 23 TB2OUT TA4OUT 19 22 TB3OUT GND 20 21 TB4OUT ENTA 1 TA1IN MAX247 DIP MAX247 FUNCTIONAL DESCRIPTION 9 RECEIVERS 4 A-SIDE RECEIVERS 5 B-SIDE RECEIVERS (RB5 ALWAYS ACTIVE) 8 TRANSMITTERS 4 A-SIDE TRANSMITTERS 4 B-SIDE TRANSMITTERS 4 CONTROL PINS ENABLE RECEIVER A-SIDE (ENRA) ENABLE RECEIVER B-SIDE (ENRB) ENABLE RECEIVER A-SIDE (ENTA) ENABLE RECEIVER B-SIDE (ENTB) 1 ENTA 16 TA1OUT 40 VCC +5V +5V ENTB 39 TB1OUT 24 400kΩ 2 TA1IN 17 TA2OUT TB1IN 38 +5V +5V TB2OUT 23 400kΩ TB2IN 37 3 TA2IN 18 TA3OUT 4 TA3IN 19 TA4OUT +5V +5V 400kΩ +5V +5V TB3OUT 22 TB3IN 36 TB4OUT 21 400kΩ 5 TA4IN TB4IN 35 6 RB5OUT RB5IN 25 5kΩ 12 RA1IN RB1IN 29 5kΩ 5kΩ 10 RA1OUT RB1OUT 31 13 RA2IN RB2IN 28 5kΩ 5kΩ 9 RA2OUT RB2OUT 32 14 RA3IN RB3IN 27 5kΩ 5kΩ 8 RA3OUT RB3OUT 33 15 RA4IN RB4IN 26 5kΩ 5kΩ 7 RA4OUT 11 ENRA RB4OUT 34 GND 20 ENRB 30 Figure 23. MAX247 Pin Configuration and Typical Operating Circuit www.maximintegrated.com Maxim Integrated │  32 MAX220–MAX249 +5V-Powered, Multichannel RS-232 Drivers/Receivers TOP VIEW +5V 1µF 2 1 1µF 1µF 44 43 42 41 40 RA2IN 7 39 RB3IN RA1IN 8 38 RB2IN ENRA 9 37 RB1IN RA1OUT 10 36 ENRB RA2OUT 11 35 RB1OUT RA3OUT 12 RA4OUT 13 33 RB3OUT TA1IN 14 32 RB4OUT TA2IN 15 31 TB1IN TA3IN 16 30 TB2IN TA4IN 17 29 TB3IN MAX248 34 RB2OUT TB4IN ENTB V- C2- C2+ C1- V+ C1+ VCC 19 20 21 22 23 24 25 26 27 28 GND ENTA C1+ 23 C124 C2+ 25 C2- VCC +5V TO +10V VOLTAGE DOUBLER PLCC 1 TA1OUT +5V +5V 8 RECEIVERS 4 A-SIDE RECEIVERS 4 B-SIDE RECEIVERS 8 TRANSMITTERS 4 A-SIDE TRANSMITTERS 4 B-SIDE TRANSMITTERS 4 CONTROL PINS ENABLE RECEIVER A-SIDE (ENRA) ENABLE RECEIVER B-SIDE (ENRB) ENABLE RECEIVER A-SIDE (ENTA) ENABLE RECEIVER B-SIDE (ENTB) V- 22 26 1µF ENTB 27 TB1OUT 44 400kΩ TB1IN 31 14 TA1IN 2 TA2OUT +5V +5V TB2OUT 43 400kΩ 15 TA2IN 3 TA3OUT 16 TA3IN 4 TA4OUT TB2IN 30 +5V +5V 400kΩ +5V +5V TB3OUT 42 TB3IN 29 TB4OUT 41 400kΩ 17 TA4IN TB4IN 28 8 RA1IN RB1IN 37 5kΩ 5kΩ MAX248 FUNCTIONAL DESCRIPTION V+ +10V TO -10V VOLTAGE INVERTER 18 ENTA + 18 20 21 RB4IN TA1OUT 3 TA4OUT TA2OUT 4 TB3OUT TA3OUT 5 TB2OUT TA4OUT 6 TB1OUT RA3IN RA4IN 1µF 10 RA1OUT RB1OUT 35 7 RA2IN RB2IN 38 5kΩ 5kΩ 11 RA2OUT RB2OUT 34 6 RA3IN RB3IN 39 5kΩ 5kΩ 12 RA3OUT RB3OUT 33 5 RA4IN RB4IN 40 5kΩ 5kΩ 13 RA4OUT 9 ENRA RB4OUT 32 GND 19 ENRB 36 Figure 24. MAX248 Pin Configuration and Typical Operating Circuit www.maximintegrated.com Maxim Integrated │  33 MAX220–MAX249 +5V-Powered, Multichannel RS-232 Drivers/Receivers +5V TOP VIEW 1µF 2 1 1µF RB4IN TA1OUT 3 1µF 44 43 42 41 40 + RA2IN 7 39 RB3IN 8 38 RB2IN ENRA 9 37 RB1IN RA1OUT 10 36 ENRB 35 RB1OUT RA2OUT 11 RA3OUT 12 RA4OUT 13 33 RB3OUT RA5OUT 14 32 RB4OUT TA1IN 15 31 RB5OUT TA2IN 16 30 TB1IN TA3IN 17 29 TB2IN MAX249 34 RB2OUT TB3IN ENTB V- C2- C2+ C1- V+ C1+ VCC 19 20 21 22 23 24 25 26 27 28 GND ENTA C1+ 23 C124 C2+ 25 C2- VCC +5V TO +10V VOLTAGE DOUBLER PLCC 1 TA1OUT +5V +5V V- 22 26 1µF ENTB 27 TB1OUT 44 400kΩ 15 TA1IN 2 TA2OUT TB1IN 30 +5V +5V TB2OUT 43 400kΩ 16 TA2IN 3 TA3OUT 17 TA3IN TB2IN 29 +5V +5V 400kΩ 8 RA1IN TB3IN 28 5kΩ 5kΩ 10 RA1OUT RB1OUT 35 7 RA2IN RB2IN 38 5kΩ 11 RA2OUT RB2OUT 34 6 RA3IN RB3IN 39 5kΩ 5kΩ 12 RA3OUT RB3OUT 33 5 RA4IN RB4IN 40 5kΩ 5kΩ 13 RA4OUT RB4OUT 32 4 RA5IN RB5IN 41 5kΩ 5kΩ 14 RA5OUT 9 ENRA TB3OUT 42 RB1IN 37 5kΩ MAX249 FUNCTIONAL DESCRIPTION 10 RECEIVERS 5 A-SIDE RECEIVERS 5 B-SIDE RECEIVERS 6 TRANSMITTERS 3 A-SIDE TRANSMITTERS 3 B-SIDE TRANSMITTERS 4 CONTROL PINS ENABLE RECEIVER A-SIDE (ENRA) ENABLE RECEIVER B-SIDE (ENRB) ENABLE RECEIVER A-SIDE (ENTA) ENABLE RECEIVER B-SIDE (ENTB) V+ +10V TO -10V VOLTAGE INVERTER 18 ENTA RA1IN 18 20 21 RB5IN TA2OUT 4 TB3OUT TA3OUT 5 TB2OUT RA5IN 6 TB1OUT RA3IN RA4IN 1µF RB5OUT 31 GND 19 ENRB 36 Figure 25. MAX249 Pin Configuration and Typical Operating Circuit www.maximintegrated.com Maxim Integrated │  34 MAX220–MAX249 +5V-Powered, Multichannel RS-232 Drivers/Receivers Ordering Information PART TEMP RANGE PIN-PACKAGE PART TEMP RANGE PIN-PACKAGE -40°C to +85°C 16 Wide SO MAX220CPE+ 0°C to +70°C 16 Plastic DIP MAX231EWE+ MAX220CSE+ 0°C to +70°C 16 Narrow SO MAX231EJD -40°C to +85°C 14 CERDIP MAX220CWE+ 0°C to +70°C 16 Wide SO MAX231MJD 55°C to +125°C 14 CERDIP Dice* MAX232CPE+ 0°C to +70°C 16 Plastic DIP 16 Plastic DIP MAX232CSE+ 0°C to +70°C 16 Narrow SO 0°C to +70°C 16 Wide SO 0°C to +70°C Dice* MAX220C/D MAX220EPE+ 0°C to +70°C -40°C to +85°C MAX220ESE+ -40°C to +85°C 16 Narrow SO MAX232CWE+ MAX220EWE+ -40°C to +85°C 16 Wide SO MAX232C/D MAX220EJE -40°C to +85°C 16 CERDIP MAX232EPE+ -40°C to +85°C 16 Plastic DIP 16 CERDIP MAX232ESE+ -40°C to +85°C 16 Narrow SO MAX220MJE MAX222CPN+ 55°C to +125°C 0°C to +70°C 18 Plastic DIP MAX232EWE+ -40°C to +85°C 16 Wide SO -40°C to +85°C 16 CERDIP MAX222CWN+ 0°C to +70°C 18 Wide SO MAX232EJE MAX222C/D 0°C to +70°C Dice* MAX232MJE 55°C to +125°C 16 CERDIP 18 Plastic DIP MAX232MLP+ 55°C to +125°C 20 LCC 0°C to +70°C 16 Plastic DIP MAX222EPN+ -40°C to +85°C MAX222EWN+ -40°C to +85°C 18 Wide SO MAX232ACPE+ MAX222EJN -40°C to +85°C 18 CERDIP MAX232ACSE+ 0°C to +70°C 16 Narrow SO 18 CERDIP MAX232ACWE+ 0°C to +70°C 16 Wide SO MAX232AC/D 0°C to +70°C Dice* MAX222MJN 55°C to +125°C MAX223CAI+ 0°C to +70°C 28 SSOP MAX223CWI+ 0°C to +70°C 28 Wide SO MAX232AEPE+ -40°C to +85°C 16 Plastic DIP Dice* MAX232AESE+ -40°C to +85°C 16 Narrow SO 28 SSOP MAX232AEWE+ -40°C to +85°C 16 Wide SO -40°C to +85°C 16 CERDIP MAX223C/D 0°C to +70°C MAX223EAI+ -40°C to +85°C MAX223EWI+ -40°C to +85°C 28 Wide SO MAX232AEJE MAX225CWI+ 0°C to +70°C 28 Wide SO MAX232AMJE 55°C to +125°C 16 CERDIP MAX225EWI+ -40°C to +85°C 28 Wide SO MAX232AMLP+ 55°C to +125°C 20 LCC MAX233CPP+ 0°C to +70°C 20 Plastic DIP MAX230CPP+ 0°C to +70°C 20 Plastic DIP1 MAX230CWP+ 0°C to +70°C 20 Wide SO MAX233EPP+ -40°C to +85°C 20 Plastic DIP Dice* MAX233ACPP+ 0°C to +70°C 20 Plastic DIP MAX233ACWP+ 0°C to +70°C 20 Wide SO MAX230C/D 0°C to +70°C MAX230EPP+ -40°C to +85°C 20 Plastic DIP MAX230EWP+ -40°C to +85°C 20 Wide SO MAX233AEPP+ -40°C to +85°C 20 Plastic DIP -40°C to +85°C 20 Wide SO MAX230EJP -40°C to +85°C 20 CERDIP MAX233AEWP+ MAX230MJP 55°C to +125°C 20 CERDIP MAX234CPE+ 0°C to +70°C 16 Plastic DIP 0°C to +70°C 16 Wide SO 0°C to +70°C Dice* MAX231CPD+ 0°C to +70°C 14 Plastic DIP MAX234CWE+ MAX231CWE+ 0°C to +70°C 16 Wide SO MAX234C/D MAX231CJD 0°C to +70°C 14 CERDIP MAX234EPE+ MAX231C/D MAX231EPD+ 0°C to +70°C -40°C to +85°C www.maximintegrated.com Dice* 14 Plastic DIP -40°C to +85°C 16 Plastic DIP +Denotes a lead(Pb)-free/RoHS-compliant package. *Contact factory for dice specifications. Maxim Integrated │  35 MAX220–MAX249 +5V-Powered, Multichannel RS-232 Drivers/Receivers Ordering Information (continued) PART TEMP RANGE PIN-PACKAGE PART TEMP RANGE PIN-PACKAGE MAX234EWE+ -40°C to +85°C 16 Wide SO MAX240CMH+ 0°C to +70°C 44 Plastic FP MAX234EJE -40°C to +85°C 16 CERDIP MAX240C/D 0°C to +70°C Dice* MAX234MJE 55°C to +125°C 16 CERDIP MAX241CAI+ 0°C to +70°C 28 SSOP MAX235CPG+ 0°C to +70°C 24 Wide Plastic DIP MAX241CWI+ 0°C to +70°C 28 Wide SO MAX235EPG+ -40°C to +85°C 24 Wide Plastic DIP MAX241C/D 0°C to +70°C Dice* MAX235EDG -40°C to +85°C 24 Ceramic SB MAX241EAI+ -40°C to +85°C 28 SSOP MAX235MDG 55°C to +125°C 24 Ceramic SB MAX241EWI+ -40°C to +85°C 28 Wide SO MAX236CNG+ 0°C to +70°C 24 Narrow Plastic DIP MAX242CAP+ 0°C to +70°C 20 SSOP MAX236CWG+ 0°C to +70°C 24 Wide SO MAX242CPN+ 0°C to +70°C 18 Plastic DIP MAX236C/D 0°C to +70°C Dice* MAX242CWN+ 0°C to +70°C 18 Wide SO MAX236ENG+ -40°C to +85°C 24 Narrow Plastic DIP MAX242C/D MAX236EWG+ -40°C to +85°C 24 Wide SO MAX242EPN+ -40°C to +85°C 18 Plastic DIP MAX236ERG -40°C to +85°C 24 Narrow CERDIP MAX242EWN+ -40°C to +85°C 18 Wide SO MAX236MRG 55°C to +125°C 24 Narrow CERDIP MAX242EJN -40°C to +85°C 18 CERDIP MAX237CNG+ 0°C to +70°C 24 Narrow Plastic DIP MAX242MJN 55°C to +125°C 18 CERDIP MAX237CWG+ 0°C to +70°C 24 Wide SO MAX243CPE+ 0°C to +70°C 16 Plastic DIP MAX237C/D 0°C to +70°C Dice* MAX243CSE+ 0°C to +70°C 16 Narrow SO 24 Narrow Plastic DIP MAX243CWE+ 0°C to +70°C 16 Wide SO MAX237ENG+ -40°C to +85°C 0°C to +70°C MAX237EWG+ -40°C to +85°C 24 Wide SO MAX243C/D MAX237ERG -40°C to +85°C 24 Narrow CERDIP MAX243EPE+ MAX237MRG 55°C to +125°C 24 Narrow CERDIP MAX243ESE+ -40°C to +85°C 16 Narrow SO MAX238CNG+ 0°C to +70°C 24 Narrow Plastic DIP MAX243EWE+ -40°C to +85°C 16 Wide SO MAX238CWG+ 0°C to +70°C 24 Wide SO MAX243EJE -40°C to +85°C 16 CERDIP 55°C to +125°C 16 CERDIP MAX238C/D MAX238ENG+ 0°C to +70°C -40°C to +85°C Dice* MAX243MJE 24 Narrow Plastic DIP MAX244CQH+ 0°C to +70°C Dice* -40°C to +85°C Dice* 16 Plastic DIP 0°C to +70°C 44 PLCC 0°C to +70°C Dice* MAX238EWG+ -40°C to +85°C 24 Wide SO MAX244C/D MAX238ERG -40°C to +85°C 24 Narrow CERDIP MAX244EQH+ -40°C to +85°C MAX238MRG 55°C to +125°C 24 Narrow CERDIP MAX245CPL+ 0°C to +70°C MAX239CNG+ 0°C to +70°C 24 Narrow Plastic DIP MAX245C/D MAX239CWG+ 0°C to +70°C 24 Wide SO MAX245EPL+ -40°C to +85°C 40 Plastic DIP 0°C to +70°C 44 PLCC 40 Plastic DIP Dice* Dice* MAX246CPL+ 0°C to +70°C 40 Plastic DIP MAX239ENG+ -40°C to +85°C 24 Narrow Plastic DIP MAX246C/D 0°C to +70°C Dice* MAX239EWG+ -40°C to +85°C 24 Wide SO MAX246EPL+ MAX239ERG -40°C to +85°C 24 Narrow CERDIP MAX239MRG 55°C to +125°C 24 Narrow CERDIP MAX239C/D 0°C to +70°C www.maximintegrated.com -40°C to +85°C 40 Plastic DIP +Denotes a lead(Pb)-free/RoHS-compliant package. *Contact factory for dice specifications. Maxim Integrated │  36 MAX220–MAX249 +5V-Powered, Multichannel RS-232 Drivers/Receivers Ordering Information (continued) PART TEMP RANGE PIN-PACKAGE MAX247CPL+ 0°C to +70°C 40 Plastic DIP MAX247C/D 0°C to +70°C Dice* MAX247EPL+ -40°C to +85°C MAX248CQH+ 0°C to +70°C 40 Plastic DIP 44 PLCC MAX248C/D 0°C to +70°C Dice* MAX248EQH+ -40°C to +85°C 44 PLCC MAX249CQH+ 0°C to +70°C 44 PLCC MAX249EQH+ -40°C to +85°C 44 PLCC +Denotes a lead(Pb)-free/RoHS-compliant package. *Contact factory for dice specifications. Selection Table PART NUMBER NO. OF POWER RS-232 SUPPLY Drivers/ (V) Rx SHDN NOMINAL Rx DATA NO. OF AND CAPACITOR ACTIVE RATE EXT CAP THREEVALUE (µF) IN SHDN (kbps) STATE MAX220 +5 2/2 4 0.047, 0.33 No No MAX222 MAX223 MAX225 MAX230 MAX231 +5 +5 +5 +5 +5 and +7.5 to +5 +5 +5 +5 2/2 4/5 5/5 5/0 2/2 4 4 0 4 2 0.1 1.0, 0.1 — 1.0, 0.1 1.0, 0.1 Yes Yes Yes Yes No No Yes Yes No No 2/2 2/2 2/2 2/2 4 4 0 0 1.0, 0.1 0.1 — — No No No No No No No No 4/0 5/5 4/3 5/3 4/4 3/5 4 0 4 4 4 2 1.0, 0.1 — 1.0, 0.1 1.0, 0.1 1.0, 0.1 1.0, 0.1 No Yes Yes No No No No No No No No No 120 120 120 120 120 120 MAX240 MAX241 +5 +5 +5 +5 +5 +5 and +7.5 to +5 +5 5/5 4/5 4 4 1.0 1.0, 0.1 Yes Yes No No 120 120 Replaces 1488 No external caps Shutdown, three state Complements IBM PC serial port Replaces 1488 and 1489 Standard +5/+12V or battery supplies; single-package solution for IBM PC serial DIP or flatpack package Complete IBM PC serial port MAX242 MAX243 MAX244 MAX245 MAX246 MAX247 MAX248 MAX249 +5 +5 +5 +5 +5 +5 +5 +5 2/2 2/2 8/10 8/10 8/10 8/9 8/8 6/10 4 4 4 0 0 0 4 4 0.1 0.1 1.0 — — — 1.0 1.0 Yes No No Yes Yes Yes Yes Yes Yes No No Yes Yes Yes Yes Yes 200 200 120 120 120 120 120 120 Separate shutdown and enable Open-line detection simplifies cabling High slew rate High slew rate, int. caps, two shutdown High slew rate, int. caps, three shutdown High slew rate, int. caps, nine operating High slew rate, selective half-chip enables Available in quad flatpack package MAX232 MAX232A MAX233 MAX233A MAX234 MAX235 MAX236 MAX237 MAX238 MAX239 www.maximintegrated.com 120 FEATURES Ultra-low-power, industry-standard pinout Low-power shutdown MAX241 and receivers active in shutdown Available in SO 5 drivers with shutdown Standard +5/+12V or battery supplies; same functions as MAX232 120 (64) Industry standard Higher slew rate, small caps 200 No external caps 120 No external caps, high slew rate 200 200 120 120 120 120 Maxim Integrated │  37 MAX220–MAX249 +5V-Powered, Multichannel RS-232 Drivers/Receivers Package Information For the latest package outline information and land patterns (footprints), go to www.maximintegrated.com/packages. Note that a “+”, “#”, or “-” in the package code indicates RoHS status only. Package drawings may show a different suffix character, but the drawing pertains to the package regardless of RoHS status. PACKAGE TYPE PACKAGE CODE P14+3 16 SO(W) W16+1 P16+1 16 SO(W) W16+2 16 PDIP P16+2 16 SO(W) W16+3 16 PDIP P16+3 18 SO(W) W18+1 18 PDIP P18+5 20 SO(W) W20+3 20 PDIP P20+3 20 SO(W) W20M+1 20 PDIP P20M+1 24 SO(W) W24+2 24 PDIP N24+3 28 SO(W) W28+1 24 PDIP P24M+1 28 PDIP P28+2 40 PDIP P40+1 20 LCC L20+3 40 PDIP P40M+2 20 SSOP A20+1 14 CERDIP J14-3 24 SSOP A24+2 16 CERDIP J16-3 18 CERDIP J18-2 PACKAGE TYPE PACKAGE CODE 14 PDIP 16 PDIP OUTLINE NO. LAND PATTERN NO. 21-0043 — 21-0044 21-0045 28 SO(W) W28+2 28 SO(W) W28M+1 28 SSOP A28+1 16 TSSOP U16+1 OUTLINE NO. LAND PATTERN NO. 90-0107 90-0181 21-0042 90-0108 90-0182 90-0109 21-0658 90-0177 90-0094 90-0110 21-0658 90-0095 90-0117 20 CERDIP J20-2 16 FPCK F16-3 21-0013 — 24 CERDIP R24-4 44 MQFP M44+5 21-0826 90-0169 16 SO(N) S16+3 44 PLCC Q44+1 16 SO(N) S16+5 44 PLCC Q44+2 21-0049 90-0236 21-0041 90-0097 Terminal Connections 01,03,05 01,03,05 J16 L20 02 02 04 04 J18 L20 J18 L20 01,03,05 01,03,05 J16 02 02 04 04 L20 J18 L20 J18 L20 1 C1+ NC NC NC EN EN 11 T1IN NC T2IN NC T2IN NC 2 V+ C1+ C1+ C1+ C1+ C1+ 12 R1OUT R2OUT T1IN R2OUT T1IN R2OUT 3 C1- V+ V+ V+ V+ V+ 13 R1IN T2IN R1OUT T2IN R1OUT T2IN 4 C2+ C1- C1- C1- C1- C1- 14 T1OUT T1IN R1IN T1IN R1IN T1IN 5 C2- C2+ C2+ C2+ C2+ C2+ 15 GND R1OUT T1OUT R1OUT T1OUT R1OUT 6 V- NC C2- NC C2- NC 16 VCC NC GND R1IN GND R1IN 7 T2OUT C2- V- C2- V- C2- 17   R1IN VCC T1OUT VCC T1OUT 8 R2IN V- T2OUT V- T2OUT V- 18   T1OUT SHND GND SHND GND 9 R2OUT T2OUT R2IN T2OUT R2IN T2OUT 19   GND   VCC   VCC 10 T2IN R2IN R2OUT R2IN R2OUT R2IN 20   VCC   SHND   SHND www.maximintegrated.com Maxim Integrated │  38 MAX220–MAX249 +5V-Powered, Multichannel RS-232 Drivers/Receivers Revision History REVISION NUMBER REVISION DATE PAGES CHANGED 15 1/06 Added part information to the lead temperature in the Absolute Maximum Ratings sections 16 7/10 Changed multiple packages to lead-free versions; updated/added notes 3, 4, 5, 7, and 8 to the Electrical Characteristics table; removed incorrect subscripting from all pin names in the Electrical Characteristics table and Pin Configurations 17 1/15 Updated General Description and Benefits and Features sections 1 18 5/19 Add Terminal Connections table 38 DESCRIPTION 2, 5, 8 1, 2–9, 17–36 For pricing, delivery, and ordering information, please visit Maxim Integrated’s online storefront at https://www.maximintegrated.com/en/storefront/storefront.html. Maxim Integrated cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim Integrated product. No circuit patent licenses are implied. Maxim Integrated reserves the right to change the circuitry and specifications without notice at any time. The parametric values (min and max limits) shown in the Electrical Characteristics table are guaranteed. Other parametric values quoted in this data sheet are provided for guidance. Maxim Integrated and the Maxim Integrated logo are trademarks of Maxim Integrated Products, Inc. ©  2019 Maxim Integrated Products, Inc. │  39