MAX3222EEUP+T

EVALUATION KIT AVAILABLE Click here for production status of specific part numbers. MAX3222E/MAX3232E/ MAX3237E/MAX3241E/ MAX3246E General Description The MAX3222E/MAX3232E/MAX3237E/MAX3241E/ MAX3246E +3.0V-powered EIA/TIA-232 and V.28/V.24 communications interface devices feature low power consumption, high data-rate capabilities, and enhanced electrostatic-discharge (ESD) protection. The enhanced ESD structure protects all transmitter outputs and receiver inputs to ±15kV using IEC 1000-4-2 Air-Gap Discharge, ±8kV using IEC 1000-4-2 Contact Discharge (±9kV for MAX3246E), and ±15kV using the Human Body Model. The logic and receiver I/O pins of the MAX3237E are protected to the above standards, while the transmitter output pins are protected to ±15kV using the Human Body Model. A proprietary low-dropout transmitter output stage delivers true RS-232 performance from a +3.0V to +5.5V power supply, using an internal dual charge pump. The charge pump requires only four small 0.1μF capacitors for operation from a +3.3V supply. Each device guarantees operation at data rates of 250kbps while maintaining RS-232 output levels. The MAX3237E guarantees operation at 250kbps in the normal operating mode and 1Mbps in the MegaBaud™ operating mode, while maintaining RS-232-compliant output levels. The MAX3222E/MAX3232E have two receivers and two transmitters. The MAX3222E features a 1μA shutdown mode that reduces power consumption in battery-powered portable systems. The MAX3222E receivers remain active in shutdown mode, allowing monitoring of external devices while consuming only 1μA of supply current. The MAX3222E and MAX3232E are pin, package, and functionally compatible with the industry-standard MAX242 and MAX232, respectively. The MAX3241E/MAX3246E are complete serial ports (three drivers/five receivers) designed for notebook and subnotebook computers. The MAX3237E (five drivers/ three receivers) is ideal for peripheral applications that require fast data transfer. These devices feature a shutdown mode in which all receivers remain active, while consuming only 1μA (MAX3241E/MAX3246E) or 10nA (MAX3237E). The MAX3222E, MAX3232E, and MAX3241E are available in space-saving SO, SSOP, TQFN and TSSOP packages. The MAX3237E is offered in an SSOP package. The MAX3246E is offered in the ultra-small 6 x 6 UCSP™ package. MegaBaud and UCSP are trademarks of Maxim Integrated Products, Inc. 19-1298; Rev 13; 12/18 ±15kV ESD-Protected, Down to 10nA, 3.0V to 5.5V, Up to 1Mbps, True RS-232 Transceivers Next-Generation Device Features ●● For Space-Constrained Applications • MAX3228E/MAX3229E: ±15kV ESD-Protected, +2.5V to +5.5V, RS-232 Transceivers in UCSP ●● For Low-Voltage or Data Cable Applications • MAX3380E/MAX3381E: +2.35V to +5.5V, 1μA, 2Tx/2Rx, RS-232 Transceivers with ±15kV • ESD-Protected I/O and Logic Pins Applications ●● ●● ●● ●● ●● ●● Battery-Powered Equipment Cell Phones Smart Phones Cell-Phone Data Cables Notebook, Subnotebook, and Palmtop Computers Printers xDSL Modems Ordering Information PART TEMP RANGE PIN-PACKAGE MAX3222ECTP+ 0°C to +70°C 20 TQFN-EP** (5mm x 5mm) MAX3222ECUP+ 0°C to +70°C 20 TSSOP MAX3222ECAP+ 0°C to +70°C 20 SSOP MAX3222ECWN+ 0°C to +70°C 18 Wide SO MAX3222ECPN+ 0°C to +70°C 18 Plastic DIP MAX3222EC/D+ 0°C to +70°C Dice* -40°C to +85°C 20 TQFN-EP** (5mm x 5mm) MAX3222EEUP/V+ -40°C to +85°C 20 TSSOP MAX3222EEUP+ -40°C to +85°C 20 TSSOP MAX3222EEAP+ -40°C to +85°C 20 SSOP MAX3222EETP+ MAX3222EEWN+ -40°C to +85°C 18 Wide SO MAX3222EEPN+ -40°C to +85°C 18 Plastic DIP MAX3232ECAE+ 0°C to +70°C 16 SSOP MAX3232ECWE+ 0°C to +70°C 16 Wide SO MAX3232ECPE+ 0°C to +70°C 16 Plastic DIP +Denotes a lead(Pb)-free/RoHS-compliant package. *Dice are tested at TA = +25°C, DC parameters only. **EP = Exposed pad. /V denotes an automotive qualified part. Ordering Information continued at end of data sheet. Pin Configurations, Selector Guide, and Typical Operating Circuits appear at end of data sheet. MAX3222E/MAX3232E/ MAX3237E/MAX3241E/ MAX3246E ±15kV ESD-Protected, Down to 10nA, 3.0V to 5.5V, Up to 1Mbps, True RS-232 Transceivers Absolute Maximum Ratings VCC to GND.............................................................-0.3V to +6V V+ to GND (Note 1)..................................................-0.3V to +7V V- to GND (Note 1)...................................................+0.3V to -7V V+ + |V-| (Note 1).................................................................+13V Input Voltages T_IN, EN, SHDN, MBAUD to GND......................-0.3V to +6V R_IN to GND....................................................................±25V Output Voltages T_OUT to GND..............................................................±13.2V R_OUT, R_OUTB (MAX3237E/MAX3241E)....................... -0.3V to (VCC + 0.3V) Short-Circuit Duration, T_OUT to GND......................Continuous Continuous Power Dissipation (TA = +70°C) 16-Pin SSOP (derate 7.14mW/°C above +70°C).........571mW 16-Pin TSSOP (derate 9.4mW/°C above +70°C)......754.7mW 16-Pin TQFN (derate 20.8mW/°C above +70°C)....1666.7mW 16-Pin Wide SO (derate 9.52mW/°C above +70°C)....762mW 18-Pin Wide SO (derate 9.52mW/°C above +70°C)....762mW 18-Pin PDIP (derate 11.11mW/°C above +70°C).........889mW 20-Pin TQFN (derate 21.3mW/°C above +70°C).......1702mW 20-Pin TSSOP (derate 10.9mW/°C above +70°C).......879mW 20-Pin SSOP (derate 8.00mW/°C above +70°C).........640mW 28-Pin SSOP (derate 9.52mW/°C above +70°C).........762mW 28-Pin Wide SO (derate 12.50mW/°C above +70°C).........1W 28-Pin TSSOP (derate 12.8mW/°C above +70°C).....1026mW 32-Pin TQFN (derate 33.3mW/°C above +70°C).......2666mW 6 x 6 UCSP (derate 12.6mW/°C above +70°C).........1010mW Operating Temperature Ranges MAX32_ _EC_ _..................................................0°C to +70°C MAX32_ _EE_ _.............................................. -40°C to +85°C Storage Temperature Range............................. -65°C to +150°C Lead Temperature (soldering, 10s).................................. +300°C Soldering Temperature (reflow)........................................ +260°C Bump Reflow Temperature (Note 2) Infrared, 15s.................................................................+200°C Vapor Phase, 20s......................................................... +215°C Note 1: V+ and V- can have maximum magnitudes of 7V, but their absolute difference cannot exceed 13V. Note 2: This device is constructed using a unique set of packaging techniques that impose a limit on the thermal profile the device can be exposed to during board-level solder attach and rework. This limit permits only the use of the solder profiles recommended in the industry-standard specification, JEDEC 020A, paragraph 7.6, Table 3 for IR/VPR and convection reflow. Preheating is required. Hand or wave soldering is not allowed. 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 (VCC = +3V to +5.5V, C1–C4 = 0.1μF, TA = TMIN to TMAX, unless otherwise noted. Typical values are at TA = +25°C.) (Notes 3, 4) PARAMETER CONDITIONS MIN TYP MAX MAX3222E, MAX3232E, MAX3241E, MAX3246E 0.3 1 MAX3237E 0.5 2.0 UNITS DC CHARACTERISTICS (V CC = +3.3V or +5V, T A = +25°C) Supply Current Shutdown Supply Current SHDN = V CC, no load mA SHDN = GND 1 10 µA SHDN = R_IN = GND, T_IN = GND or V CC (MAX3237E) 10 300 nA 0.8 V LOGIC INPUTS Input Logic Low Input Logic High T_IN, EN, SHDN, MBAUD T_IN, EN, SHDN, MBAUD VCC = +3.3V 2.0 VCC = +5.0V 2.4 Transmitter Input Hysteresis Input Leakage Current www.maximintegrated.com V 0.5 T_IN, EN, SHDN MAX3222E, MAX3232E, MAX3241E, MAX3246E T_IN, SHDN, MBAUD MAX3237E (Note 5) V ±0.01 ±1 9 18 µA Maxim Integrated │  2 MAX3222E/MAX3232E/ MAX3237E/MAX3241E/ MAX3246E ±15kV ESD-Protected, Down to 10nA, 3.0V to 5.5V, Up to 1Mbps, True RS-232 Transceivers Electrical Characteristics (continued) (VCC = +3V to +5.5V, C1–C4 = 0.1μF, TA = TMIN to TMAX, unless otherwise noted. Typical values are at TA = +25°C.) (Notes 3, 4) PARAMETER CONDITIONS MIN TYP MAX UNITS ±0.05 ±10 µA 0.4 V RECEIVER OUTPUTS Output Leakage Current R_OUT (MAX3222E/MAX3237E/MAX3241E/ MAX3246E), EN = VCC, receivers disabled Output-Voltage Low IOUT = 1.6mA (MAX3222E/MAX3232E/MAX3241E/ MAX3246E), IOUT = 1.0mA (MAX3237E) Output-Voltage High IOUT = -1.0mA VCC 0.6 VCC 0.1 V RECEIVER INPUTS Input Voltage Range -25 Input Threshold Low TA = +25°C Input Threshold High TA = +25°C VCC = +3.3V 0.6 1.1 VCC = +5.0V 0.8 1.5 1.5 2.4 VCC = +5.0V 2.0 2.4 0.5 TA = +25°C 3 5 Output Voltage Swing All transmitter outputs loaded with 3kΩ to ground (Note 6) ±5 ±5.4 Output Resistance VCC = 0V, transmitter output = ±2V 300 50k V V VCC = +3.3V Input Hysteresis Input Resistance +25 V V 7 kΩ TRANSMITTER OUTPUTS Output Short-Circuit Current Output Leakage Current VCC = 0V or +3.0V to +5.5V, VOUT = ±12V, transmitters disabled (MAX3222E/MAX3232E/MAX3241E/MAX3246E) V Ω ±60 mA ±25 µA MOUSE DRIVABILITY (MAX3241E) Transmitter Output Voltage T1IN = T2IN = GND, T3IN = VCC, T3OUT loaded with 3kΩ to GND, T1OUT and T2OUT loaded with 2.5mA each ±5 V ESD PROTECTION R_IN, T_OUT Human Body Model ±15 IEC 1000-4-2 Air-Gap Discharge (except MAX3237E) ±15 IEC 1000-4-2 Contact Discharge (except MAX3237E) ±8 IEC 1000-4-2 Contact Discharge (MAX3246E only) T_IN, R_IN, R_OUT, EN, SHDN, MBAUD www.maximintegrated.com MAX3237E kV ±9 Human Body Model ±15 IEC 1000-4-2 Air-Gap Discharge ±15 IEC 1000-4-2 Contact Discharge ±8 kV Maxim Integrated │  3 MAX3222E/MAX3232E/ MAX3237E/MAX3241E/ MAX3246E ±15kV ESD-Protected, Down to 10nA, 3.0V to 5.5V, Up to 1Mbps, True RS-232 Transceivers Timing Characteristics—MAX3222E/MAX3232E/MAX3241E/MAX3246E (VCC = +3V to +5.5V, C1–C4 = 0.1μF, TA = TMIN to TMAX, unless otherwise noted. Typical values are at TA = +25°C.) (Notes 3, 4) PARAMETER SYMBOL RL = 3kΩ, CL = 1000pF, one transmitter switching Maximum Data Rate Receiver Propagation Delay Receiver Output Enable Time tPHL tPLH Receiver Output Disable Time Transmitter Skew Receiver Skew CONDITIONS |tPHL - tPLH| MIN TA = TMIN to TMAX (MAX3222E/MAX3232E/ MAX3241E) (Note 6) 250 TA = +25°C (MAX3246E) 250 MAX UNITS kbps Receiver input to receiver output, CL = 150pF 0.15 Normal operation (except MAX3232E) 200 ns Normal operation (except MAX3232E) 200 ns (Note 7) 100 ns 50 ns VCC = +3.3V, TA = +25°C, RL = 3kΩ to 7kΩ, measured from +3.0V to -3.0V or -3.0V to +3.0V, one transmitter switching µs 0.15 |tPHL - tPLH| Transition-Region Slew Rate TYP CL = 150pF to 1000pF 6 30 V/µs Timing Characteristics—MAX3237E (VCC = +3V to +5.5V, C1–C4 = 0.1μF, TA = TMIN to TMAX, unless otherwise noted. Typical values are at TA = +25°C.) (Note 3) PARAMETER Maximum Data Rate CONDITIONS 250 VCC = +3.0V to +4.5V, RL = 3kΩ, CL = 250pF, one transmitter switching, MBAUD = VCC 1000 VCC = +4.5V to +5.5V, RL = 3kΩ, CL = 1000pF, one transmitter switching, MBAUD = VCC 1000 Receiver Propagation Delay R_IN to R_OUT, CL = 150pF Receiver Output Enable Time Normal operation Receiver Output Disable Time Normal operation Transmitter Skew (Note 7) Receiver Skew Transition-Region Slew Rate MIN RL = 3kΩ, CL = 1000pF, one transmitter switching, MBAUD = GND tPHL CL = 150pF to 1000pF µs 2.6 µs 2.4 µs 100 ns 50 ns MBAUD = GND 6 30 MBAUD = VCC 24 150 4 30 CL = 150pF to 2500pF, MBAUD = GND UNITS kbps 0.15 |tPHL - tPLH|, MBAUD = GND VCC = +3.3V, RL = 3kΩ to 7kΩ, +3.0V to -3.0V or -3.0V to +3.0V, TA = +25°C MAX 0.15 tPLH |tPHL - tPLH|, MBAUD = VCC |tPHL - tPLH| TYP V/µs Note 3: MAX3222E/MAX3232E/MAX3241E: C1–C4 = 0.1μF tested at +3.3V ±10%; C1 = 0.047μF, C2, C3, C4 = 0.33μF tested at +5.0V ±10%. MAX3237E: C1–C4 = 0.1μF tested at +3.3V ±5%, C1–C4 = 0.22μF tested at +3.3V ±10%; C1 = 0.047μF, C2, C3, C4 = 0.33μF tested at +5.0V ±10%. MAX3246E: C1-C4 = 0.22μF tested at +3.3V ±10%; C1 = 0.22μF, C2, C3, C4 = 0.54μF tested at +5.0V ±10%. Note 4: MAX3246E devices are production tested at +25°C. All limits are guaranteed by design over the operating temperature range. Note 5: The MAX3237E logic inputs have an active positive feedback resistor. The input current goes to zero when the inputs are at the supply rails. Note 6: MAX3241EEUI is specified at TA = +25°C. Transmitter skew is measured at the transmitter zero crosspoints. www.maximintegrated.com Maxim Integrated │  4 MAX3222E/MAX3232E/ MAX3237E/MAX3241E/ MAX3246E ±15kV ESD-Protected, Down to 10nA, 3.0V to 5.5V, Up to 1Mbps, True RS-232 Transceivers Typical Operating Characteristics (VCC = +3.3V, 250kbps data rate, 0.1μF capacitors, all transmitters loaded with 3kΩ and CL, TA = +25°C, unless otherwise noted.) SLEW RATE (V/µs) T1 TRANSMITTING AT 250kbps T2 TRANSMITTING AT 15.6kbps 2 1 0 -1 -2 -3 -SLEW 12 10 +SLEW 8 6 4 -4 -5 -6 VOUT0 1000 2000 3000 4000 2 0 5000 0 1000 0 1000 2000 3000 SLEW RATE (V/µs) 4000 120kbps 25 20 20kbps 15 10 5 0 5000 0 2000 3000 4000 5000 MAX3241E OPERATING SUPPLY CURRENT vs. LOAD CAPACITANCE MAX3237E toc05 10 8 6 4 0 5000 1000 LOAD CAPACITANCE (pF) 60 1 TRANSMITTER AT 250kbps 2 TRANSMITTERS AT 15.6kbps 50 250kbps 40 120kbps 30 20kbps 20 10 2 VOUT- 0 1000 2000 3000 4000 0 5000 0 1000 2000 3000 4000 5000 LOAD CAPACITANCE (pF) MAX3237E TRANSMITTER OUTPUT VOLTAGE vs. LOAD CAPACITANCE (MBAUD = GND) MAX3237E TRANSMITTER OUTPUT VOLTAGE vs. LOAD CAPACITANCE MAX3237E TRANSMITTER OUTPUT VOLTAGE vs. LOAD CAPACITANCE (MBAUD = VCC) FOR DATA RATES UP TO 250kbps 1 TRANSMITTER AT 250kbps 4 TRANSMITTERS AT 15.6kbps ALL TRANSMITTERS LOADED WITH 3kΩ + CL 0 -1 -2 -3 -4 -5 VOUT0 500 1000 1500 2000 LOAD CAPACITANCE (pF) www.maximintegrated.com 2500 3000 VOUT+ FOR DATA RATES UP TO 250kbps 1 TRANSMITTER 250kbps 4 TRANSMITTERS 15.6kbps ALL TRANSMITTERS LOADED WITH 3kΩ + CL VOUT0 500 1000 1500 2000 LOAD CAPACITANCE (pF) 2500 3000 7.5 TRANSMITTER OUTPUT VOLTAGE (V) VOUT+ 6 5 4 3 2 1 0 -1 -2 -3 -4 -5 -6 MAX3237E toc08 LOAD CAPACITANCE (pF) MAX3246E toc07A LOAD CAPACITANCE (pF) 2 1 -6 12 TRANSMITTER OUTPUT VOLTAGE (V) 6 5 4 3 14 MAX3237E to04 1 TRANSMITTER AT 250kbps 2 TRANSMITTERS AT 15.6kbps 0 -1 -2 -3 -4 -5 -6 4000 250kbps 30 MAX3241E SLEW RATE vs. LOAD CAPACITANCE MAX3237E toc07 TRANSMITTER OUTPUT VOLTAGE (V) TRANSMITTER OUTPUT VOLTAGE (V) VOUT+ 3000 35 LOAD CAPACITANCE (pF) MAX3241E TRANSMITTER OUTPUT VOLTAGE vs. LOAD CAPACITANCE 5 4 3 2 1 2000 T1 TRANSMITTING AT 250kbps T2 TRANSMITTING AT 15.6kbps 40 FOR DATA RATES UP TO 250kbps LOAD CAPACITANCE (pF) 6 45 MAX3237E toc03 14 SUPPLY CURRENT (mA) 3 16 MAX3237E toc02 VOUT+ SUPPLY CURRENT (mA) 5 4 MAX3237E toc01 TRANSMITTER OUTPUT VOLTAGE (V) 6 MAX3222E/MAX3232E OPERATING SUPPLY CURRENT vs. LOAD CAPACITANCE MAX3222E/MAX3232E SLEW RATE vs. LOAD CAPACITANCE MAX3237E toc06 MAX3222E/MAX3232E TRANSMITTER OUTPUT VOLTAGE vs. LOAD CAPACITANCE 1Mbps 5.0 2Mbps 2.5 1.5Mbps 1 TRANSMITTER AT FULL DATA RATE 4 TRANSMITTERS AT 1/16 DATA RATE 3kΩ + CL LOAD, EACH OUTPUT 0 -2.5 -7.5 1.5Mbps 2Mbps -5.0 1Mbps 0 500 1000 1500 2000 LOAD CAPACITANCE (pF) Maxim Integrated │  5 MAX3222E/MAX3232E/ MAX3237E/MAX3241E/ MAX3246E ±15kV ESD-Protected, Down to 10nA, 3.0V to 5.5V, Up to 1Mbps, True RS-232 Transceivers Typical Operating Characteristics (continued) (VCC = +3.3V, 250kbps data rate, 0.1μF capacitors, all transmitters loaded with 3kΩ and CL, TA = +25°C, unless otherwise noted.) SR+ 6 1 TRANSMITTER AT 250kbps 4 TRANSMITTERS AT 15.6kbps ALL TRANSMITTERS LOADED WITH 3kΩ + CL 1000 1500 2000 2500 0 500 500 1000 1500 2000 6 5 4 3 2 1 0 -1 -2 -3 -4 -5 -6 3000 5000 12 SRSR+ 8 4 2000 2500 MAX3237E toc11 3000 30 20 0 5.0 1 TRANSMITTER AT 250kbps 4 TRANSMITTERS AT 15.6kbps ALL TRANSMITTERS LOADED WITH 3kΩ AND 1000pF 2.0 2.5 3.0 3.5 4.0 4.5 5.0 MAX3246E OPERATING SUPPLY CURRENT vs. LOAD CAPACITANCE 60 MAX3237E toc16 MAX3237E toc15 TRANSMITTER OUTPUT VOLTAGE (V) LOAD CAPACITANCE (pF) www.maximintegrated.com 14 10 1500 SUPPLY VOLTAGE (V) 16 SLEW RATE (V/µs) 4000 4.5 6 VOUT2000 1000 40 10 MAX3246E SLEW RATE vs. LOAD CAPACITANCE 1 TRANSMITTER AT 250kbps 2 TRANSMITTERS AT 15.6kbps 1000 4.0 500 0 SUPPLY VOLTAGE (V) MAX3246E TRANSMITTER OUTPUT VOLTAGE vs. LOAD CAPACITANCE VOUT+ 3.5 1 TRANSMITTER AT 20kbps, 120kbps, 250kbps 4 TRANSMITTERS AT 15.6kbps ALL TRANSMITTERS LOADED WITH 3kΩ + CL 50 VOUT3.0 20 MAX3237E SUPPLY CURRENT vs. SUPPLY VOLTAGE (MBAUD = GND) 1 TRANSMITTER AT 250kbps 4 TRANSMITTERS AT 15.6kbps ALL TRANSMITTERS LOADED WITH 3kΩ + 1000pF 2.5 20kbps 30 LOAD CAPACITANCE (pF) VOUT+ 2.0 120kbps 0 2000 MAX3237E TRANSMITTER OUTPUT VOLTAGE vs. SUPPLY VOLTAGE (MBAUD = GND) |tPLH - tPHL| 1 TRANSMITTER AT 500kbps 4 TRANSMITTERS AT 1/16 DATA RATE ALL TRANSMITTERS LOADED WITH 3kΩ + CL 0 1500 MAX3237E TRANSMITTER SKEW vs. LOAD CAPACITANCE (MBAUD = VCC) LOAD CAPACITANCE (pF) 7 6 5 4 3 2 1 0 -1 -2 -3 -4 -5 -6 1000 40 10 LOAD CAPACITANCE (pF) 40 0 1 TRANSMITTER AT FULL DATA RATE 4 TRANSMITTERS AT 1/16 DATA RATE 3kΩ + CL LOAD EACH OUTPUT LOAD CAPACITANCE (pF) 60 0 0 3000 80 20 20 10 MAX3237E toc12 100 500 30 SUPPLY CURRENT (mA) 0 40 SUPPLY CURRENT (mA) 0 50 250kbps MAX3237E toc13 4 2 TRANSMITTER SKEW (ns) SLEW RATE (V/µs) 8 TRANSMITTER OUTPUT VOLTAGE (V) SLEW RATE (V/µs) SR- -SLEW, 1Mbps +SLEW, 1Mbps -SLEW, 2Mbps +SLEW, 2Mbps MAX3237E toc14 60 SUPPLY CURRENT (mA) 10 50 MAX3237E toc10 70 MAX3237E toc09 12 MAX3237E SUPPLY CURRENT vs. LOAD CAPACITANCE WHEN TRANSMITTING DATA (MBAUD = GND) MAX3237E SLEW RATE vs. LOAD CAPACITANCE (MBAUD = VCC) MAX3237E toc17 MAX3237E SLEW RATE vs. LOAD CAPACITANCE (MBAUD = GND) 1 TRANSMITTER AT 250kbps 2 TRANSMITTERS AT 15.6kbps 55 50 45 40 250kbps 35 120kbps 30 25 20 15 20kbps 10 5 0 1000 2000 3000 4000 LOAD CAPACITANCE (pF) 5000 0 0 1000 2000 3000 4000 5000 LOAD CAPACITANCE (pF) Maxim Integrated │  6 MAX3222E/MAX3232E/ MAX3237E/MAX3241E/ MAX3246E ±15kV ESD-Protected, Down to 10nA, 3.0V to 5.5V, Up to 1Mbps, True RS-232 Transceivers Pin Description PIN MAX3222E MAX3232E SO/ TSSOP/ TQFN TQFN DIP SSOP MAX3241E SO/DIP/ SSOP/ MAX3246E SSOP/ 20-PIN MAX3237E SO/ TQFN 16-PIN TSSOP TSSOP TSSOP NAME FUNCTION 19 1 1 — — — 13* 23 22 B3 EN Receiver Enable. Active low. 1 2 2 16 1 2 28 28 28 F3 C1+ Positive Terminal of Voltage-Doubler Charge-Pump Capacitor 20 3 3 15 2 3 27 27 27 F1 V+ +5.5V Generated by the Charge Pump 2 4 4 1 3 4 25 24 23 F4 C1- Negative Terminal of Voltage-Doubler Charge-Pump Capacitor 3 5 5 2 4 5 1 1 29 E1 C2+ Positive Terminal of Inverting Charge-Pump Capacitor 4 6 6 3 5 6 3 2 30 D1 C2- Negative Terminal of Inverting Charge-Pump Capacitor 5 7 7 4 6 7 4 3 31 C1 V- -5.5V Generated by the Charge Pump 6, 15 8, 15 8, 17 5, 12 7, 14 8, 17 5, 6, 7, 10, 12 9, 10, 11 6, 7, 8 F6, E6, D6 T_OUT 7, 14 9, 14 9, 16 6, 11 8, 13 9, 16 8, 9, 11 4–8 1–5 A4, A5, A6, B6, C6 R_IN 15–19 13, 14, 15, 17, 18 C2, B1, A1, TTL/CMOS Receiver R_OUT A2, A3 Outputs 8, 13 10, 13 10, 15 7, 10 9, 12 12, 15 18, 20, 21 10, 11 11, 12 12, 13 8, 9 10, 11 13, 14 17*, 19*, 22*, 23*, 24* 12, 13, 10, E3, E2, D2 14 11, 12 T_IN RS-232 Transmitter Outputs RS-232 Receiver Inputs TTL/CMOS Transmitter Inputs *These pins have an active positive feedback resistor internal to the MAX3237E, allowing unused inputs to be left unconnected. www.maximintegrated.com Maxim Integrated │  7 MAX3222E/MAX3232E/ MAX3237E/MAX3241E/ MAX3246E ±15kV ESD-Protected, Down to 10nA, 3.0V to 5.5V, Up to 1Mbps, True RS-232 Transceivers Pin Description (continued) PIN MAX3222E MAX3232E SO/ TSSOP/ TQFN TQFN DIP SSOP MAX3241E SO/DIP/ SSOP/ MAX3246E SSOP/ 20-PIN MAX3237E SO/ TQFN 16-PIN TSSOP TSSOP TSSOP NAME FUNCTION 16 16 18 13 15 18 2 25 24 F5 GND Ground 17 17 19 14 16 19 26 26 26 F2 VCC +3.0V to +5.5V Supply Voltage 18 18 20 — — — 14* 22 21 B2 SHDN — 1, 10, 11, 20 9, 12 — — — — — — — 11, 14 — — — www.maximintegrated.com — — — — — — — — — — — — C3, D3, B4, 9, 16, C4, D4, E4, 25, B5, C5, D5, 32 E5 15* — — 16 20, 21 19, 20 — — — — — — N.C. Shutdown Control. Active low. No Connection. For MAX3246E, these locations are not populated with solder bumps. MegaBaud Control Input. Connect to GND for normal operation; MBAUD connect to VCC for 1Mbps transmission rates. R_ OUTB EP Noninverting Complementary Receiver Outputs. Always active. Exposed Pad. Solder the exposed pad to the ground plane or leave unconnected (for TQFN only). Maxim Integrated │  8 MAX3222E/MAX3232E/ MAX3237E/MAX3241E/ MAX3246E ±15kV ESD-Protected, Down to 10nA, 3.0V to 5.5V, Up to 1Mbps, True RS-232 Transceivers VCC VCC 0.1µF 0.1µF VCC C1+ C1 C1C2+ C2 C2- MAX3222E MAX3232E MAX3237E MAX3241E MAX3246E C3 C1 C4 C2 MAX3222E MAX3232E MAX3237E MAX3241E MAX3246E 3kΩ MINIMUM SLEW-RATE TEST CIRCUIT VC4 R_ IN 5kΩ 1000pF (2500pF, MAX3237E only) C3 T_ OUT R_ OUT 5kΩ GND C2- V+ T_ IN R_ IN R_ OUT C1C2+ V- T_ OUT T_ IN VCC C1+ V+ GND 7kΩ 150pF MAXIMUM SLEW-RATE TEST CIRCUIT Figure 1. Slew-Rate Test Circuits Detailed Description Dual Charge-Pump Voltage Converter The MAX3222E/MAX3232E/MAX3237E/MAX3241E/ MAX3246E’s internal power supply consists of a regulated dual charge pump that provides output voltages of +5.5V (doubling charge pump) and -5.5V (inverting charge pump) over the +3.0V to +5.5V VCC range. The charge pump operates in discontinuous mode; if the output voltages are less than 5.5V, the charge pump is enabled, and if the output voltages exceed 5.5V, the charge pump is disabled. Each charge pump requires a flying capacitor (C1, C2) and a reservoir capacitor (C3, C4) to generate the V+ and V- supplies (Figure 1). RS-232 Transmitters The transmitters are inverting level translators that convert TTL/CMOS-logic levels to ±5V EIA/TIA-232-compliant levels. The MAX3222E/MAX3232E/MAX3237E/MAX3241E/ MAX3246E transmitters guarantee a 250kbps data rate with worst-case loads of 3kΩ in parallel with 1000pF, providing compatibility with PC-to-PC communication software (such as LapLink™). Transmitters can be paralleled to drive multiple receivers or mice. The MAX3222E/MAX3237E/MAX3241E/MAX3246E transmitters are disabled and the outputs are forced into a high-impedance state when the device is in shutdown mode (SHDN = GND). The MAX3222E/MAX3232E/ MAX3237E/MAX3241E/MAX3246E permit the outputs to be driven up to ±12V in shutdown. The MAX3222E/MAX3232E/MAX3241E/MAX3246E transmitter inputs do not have pullup resistors. Connect unused inputs to GND or VCC. The MAX3237E’s transmitter inputs have a 400kΩ active positive-feedback resistor, allowing unused inputs to be left unconnected. MAX3237E MegaBaud Operation For higher-speed serial communications, the MAX3237E features MegaBaud operation. In MegaBaud operating mode (MBAUD = VCC), the MAX3237E transmitters guarantee a 1Mbps data rate with worst-case loads of 3kΩ in parallel with 250pF for +3.0V < VCC < +4.5V. For +5V ±10% operation, the MAX3237E transmitters guarantee a 1Mbps data rate into worst-case loads of 3kΩ in parallel with 1000pF. RS-232 Receivers The receivers convert RS-232 signals to CMOS-logic output levels. The MAX3222E/MAX3237E/MAX3241E/ MAX3246E receivers have inverting three-state outputs. Drive EN high to place the receiver(s) into a high-impedance state. Receivers can be either active or inactive in shutdown (Table 1). LapLink is a trademark of Traveling Software. www.maximintegrated.com Maxim Integrated │  9 MAX3222E/MAX3232E/ MAX3237E/MAX3241E/ MAX3246E ±15kV ESD-Protected, Down to 10nA, 3.0V to 5.5V, Up to 1Mbps, True RS-232 Transceivers VCC VCC 5V/div 0 PREVIOUS RS-232 PROTECTION DIODE Rx 2V/div 0 5kΩ UART GND SHDN = GND 40µs/div Figure 3. Transmitter Outputs Recovering from Shutdown or Powering Up a) OLDER RS-232: POWERED-DOWN UART DRAWS CURRENT FROM A ACTIVE RECEIVER OUTPUT IN SHUTDOWN. MAX3222E/MAX3237E/MAX3241E/ MAX3246E Shutdown Mode VCC LOGIC TRANSITION DETECTOR MAX3237E/ MAX3241E R1OUTB VCC PROTECTION DIODE Rx R1IN R1OUT THREE-STATED EN = VCC UART T1IN Tx GND T1OUT VCC = 3.3V C1–C4 = 0.1µF Tx TO µP SHDN T2OUT 5kΩ T1OUT SHDN = GND b) NEW MAX3237E/MAX3241E: EN SHUTS DOWN RECEIVER OUTPUTS B (EXCEPT FOR B OUTPUTS), SO NO CURRENT FLOWS TO UART IN SHUTDOWN. B B OUTPUTS INDICATE RECEIVER ACTIVITY DURING SHUTDOWN WITH EN HIGH. Figure 2. Detection of RS-232 Activity when the UART and Interface are Shut Down; Comparison of MAX3237E/ MAX3241E (b) with Previous Transceivers (a) The complementary outputs on the MAX3237E/ MAX3241E (R_OUTB) are always active, regardless of the state of EN or SHDN. This allows the device to be used for ring indicator applications without forward biasing other devices connected to the receiver outputs. This is ideal for systems where VCC drops to zero in shutdown to accommodate peripherals such as UARTs (Figure 2). www.maximintegrated.com Supply current falls to less than 1μA in shutdown mode (SHDN = low). The MAX3237E’s supply current falls to10nA (typ) when all receiver inputs are in the invalid range (-0.3V < R_IN < +0.3V). When shut down, the device’s charge pumps are shut off, V+ is pulled down to VCC, V- is pulled to ground, and the transmitter outputs are disabled (high impedance). The time required to recover from shutdown is typically 100μs, as shown in Figure 3. Connect SHDN to VCC if shutdown mode is not used. SHDN has no effect on R_OUT or R_OUTB (MAX3237E/MAX3241E). ±15kV ESD Protection As with all Maxim devices, ESD-protection structures are incorporated to protect against electrostatic discharges encountered during handling and assembly. The driver outputs and receiver inputs of the MAX3222E/ MAX3232E/MAX3237E/MAX3241E/MAX3246E have extra protection against static electricity. Maxim’s engineers have developed state-of-the-art structures to protect these pins against ESD of ±15kV without damage. The ESD structures withstand high ESD in all states: normal operation, shutdown, and powered down. After an ESD event, Maxim’s E versions keep working without latchup, whereas competing RS-232 products can latch and must be powered down to remove latchup. Furthermore, the MAX3237E logic I/O pins also have ±15kV ESD protection. Protecting the logic I/O pins to ±15kV makes the MAX3237E ideal for data cable applications. Maxim Integrated │  10 MAX3222E/MAX3232E/ MAX3237E/MAX3241E/ MAX3246E ±15kV ESD-Protected, Down to 10nA, 3.0V to 5.5V, Up to 1Mbps, True RS-232 Transceivers Table 1. MAX3222E/MAX3237E/MAX3241E/ MAX3246E Shutdown and Enable Control Truth Table ESD protection can be tested in various ways; the transmitter outputs and receiver inputs for the MAX3222E/ MAX3232E/MAX3241E/MAX3246E are characterized for protection to the following limits: ●● ±15kV using the Human Body Model SHDN EN T_OUT R_OUT R_OUTB (MAX3237E/ MAX3241E) 0 0 High impedance Active Active 0 1 High impedance High impedance ●● ±9kV (MAX3246E only) using the Contact Discharge method specified in IEC 1000-4-2 Active 1 0 Active Active Active ●● ±15kV using the Air-Gap Discharge method specified in IEC 1000-4-2 Active High impedance Active 1 1 RC 1MΩ CHARGE-CURRENTLIMIT RESISTOR HIGHVOLTAGE DC SOURCE Cs 100pF RD 1500Ω IP 100% 90% DISCHARGE RESISTANCE STORAGE CAPACITOR ●● ±8kV using the Contact Discharge method specified in IEC 1000-4-2 Ir PEAK-TO-PEAK RINGING (NOT DRAWN TO SCALE) AMPERES DEVICEUNDERTEST Figure 4a. Human Body ESD Test Model 36.8% 10% 0 0 tRL TIME tDL CURRENT WAVEFORM Figure 4b. Human Body Model Current Waveform I 100% CHARGE-CURRENTLIMIT RESISTOR HIGHVOLTAGE DC SOURCE Cs 150pF 90% RD 330Ω DISCHARGE RESISTANCE STORAGE CAPACITOR I PEAK RC 50MΩ to 100MΩ DEVICEUNDERTEST 10% t r = 0.7ns to 1ns t 30ns 60ns Figure 5a. IEC 1000-4-2 ESD Test Model www.maximintegrated.com Figure 5b. IEC 1000-4-2 ESD Generator Current Waveform Maxim Integrated │  11 ±15kV ESD-Protected, Down to 10nA, 3.0V to 5.5V, Up to 1Mbps, True RS-232 Transceivers Table 2. Required Minimum Capacitor Values C1 (ΜF) C2, C3, C4 (ΜF) MAX3222E/MAX3232E/MAX3241E 3.0 to 3.6 0.1 0.1 4.5 to 5.5 0.047 0.33 3.0 to 5.5 0.1 0.47 3.0 to 3.6 0.22 0.22 3.15 to 3.6 0.1 0.1 4.5 to 5.5 0.047 0.33 3.0 to 5.5 0.22 1.0 MAX3237E/MAX3246E Table 3. Logic-Family Compatibility with Various Supply Voltages SYSTEM POWER-SUPPLY VOLTAGE (V) V CC SUPPLY VOLTAGE (V) 3.3 3.3 Compatible with all CMOS families 5 5 Compatible with all TTL and CMOS families 5 3.3 COMPATIBILITY Compatible with ACT and HCT CMOS, and with AC, HC, or CD4000 CMOS For the MAX3237E, all logic and RS-232 I/O pins are characterized for protection to ±15kV per the Human Body Model. ESD Test Conditions ESD performance depends on a variety of conditions. Contact Maxim for a reliability report that documents test setup, test methodology, and test results. Human Body Model Figure 4a shows the Human Body Model, and Figure 4b shows the current waveform it generates when discharged into a low impedance. This model consists of a 100pF capacitor charged to the ESD voltage of interest, which is then discharged into the test device through a 1.5kΩ resistor. www.maximintegrated.com TRANSMITTER OUTPUT VOLTAGE (V) V CC (V) 6 5 4 3 VOUT+ VCC = 3.0V 2 1 0 VOUT+ -1 -2 -3 -4 -5 -6 MAX3222E-fig06a MAX3222E/MAX3232E/ MAX3237E/MAX3241E/ MAX3246E VCC VOUTVOUT- 0 1 2 3 4 5 6 7 8 9 10 LOAD CURRENT PER TRANSMITTER (mA) Figure 6a. MAX3241E Transmitter Output Voltage vs. Load Current Per Transmitter IEC 1000-4-2 The IEC 1000-4-2 standard covers ESD testing and performance of finished equipment; it does not specifically refer to integrated circuits. The MAX3222E/MAX3232E/ MAX3237E/MAX3241E/MAX3246E help you design equipment that meets level 4 (the highest level) of IEC 1000-4-2, without the need for additional ESDprotection components. The major difference between tests done using the Human Body Model and IEC 1000-4-2 is higher peak current in IEC 1000-4-2, because series resistance is lower in the IEC 1000-4-2 model. Hence, the ESD withstand voltage measured to IEC 1000-4-2 is generally lower than that measured using the Human Body Model. Figure 5a shows the IEC 1000-4-2 model, and Figure 5b shows the current waveform for the ±8kV IEC 1000-4-2 level 4 ESD Contact Discharge test. The Air-Gap Discharge test involves approaching the device with a charged probe. The Contact Discharge method connects the probe to the device before the probe is energized. Machine Model The Machine Model for ESD tests all pins using a 200pF storage capacitor and zero discharge resistance. Its objective is to emulate the stress caused by contact that occurs with handling and assembly during manufacturing. All pins require this protection during manufacturing, not just RS-232 inputs and outputs. Therefore, after PC board assembly, the Machine Model is less relevant to I/O ports. Maxim Integrated │  12 MAX3222E/MAX3232E/ MAX3237E/MAX3241E/ MAX3246E ±15kV ESD-Protected, Down to 10nA, 3.0V to 5.5V, Up to 1Mbps, True RS-232 Transceivers VCC = +3.0V TO +5.5V C1 28 24 1 C2 VCC 2 C1+ CBYPASS 26 VCC V+ 27 C1C2+ MAX3241E V- 3 14 C2T1IN T1OUT 9 13 T2IN T2OUT 10 12 T3IN T3OUT 11 21 R1OUTB 20 R2OUTB 19 R1OUT 18 R2OUT 17 C3 COMPUTER SERIAL PORT C4 +V +V -V GND R1IN 4 5kΩ R2IN 5 R3OUT 5kΩ R3IN 6 16 R4OUT 5kΩ R4IN 7 15 R5OUT R5IN 8 23 EN SHDN 22 5kΩ 5kΩ GND 25 Tx MOUSE VCC Figure 6b. Mouse Driver Test Circuit Applications Information Capacitor Selection The capacitor type used for C1–C4 is not critical for proper operation; polarized or nonpolarized capacitors can be used. The charge pump requires 0.1μF capacitors for 3.3V operation. For other supply voltages, see Table 2 for required capacitor values. Do not use values smaller than those listed in Table 2. Increasing the capacitor values (e.g., by a factor of 2) reduces ripple on the transmitter outputs and slightly reduces power consumption. C2, C3, and C4 can be increased without changing C1’s value. However, do not increase C1 without also increasing the values of C2, C3, C4, and CBYPASS to maintain the proper ratios (C1 to the other capacitors). excessively with temperature. If in doubt, use capacitors with a larger nominal value. The capacitor’s equivalent series resistance (ESR), which usually rises at low temperatures, influences the amount of ripple on V+ and V-. Power-Supply Decoupling In most circumstances, a 0.1μF VCC bypass capacitor is adequate. In applications sensitive to power-supply noise, use a capacitor of the same value as charge-pump capacitor C1. Connect bypass capacitors as close to the IC as possible. Operation Down to 2.7V Transmitter outputs meet EIA/TIA-562 levels of ±3.7V with supply voltages as low as 2.7V. When using the minimum required capacitor values, make sure the capacitor value does not degrade www.maximintegrated.com Maxim Integrated │  13 MAX3222E/MAX3232E/ MAX3237E/MAX3241E/ MAX3246E ±15kV ESD-Protected, Down to 10nA, 3.0V to 5.5V, Up to 1Mbps, True RS-232 Transceivers Transmitter Outputs Recovering from Shutdown transmitters are enabled only when the magnitude of Vexceeds approximately -3.0V. Figure 3 shows two transmitter outputs recovering from shutdown mode. As they become active, the two transmitter outputs are shown going to opposite RS-232 levels (one transmitter input is high; the other is low). Each transmitter is loaded with 3kΩ in parallel with 2500pF. The transmitter outputs display no ringing or undesirable transients as they come out of shutdown. Note that the Mouse Drivability The MAX3241E is designed to power serial mice while operating from low-voltage power supplies. It has been tested with leading mouse brands from manufacturers such as Microsoft and Logitech. The MAX3241E successfully drove all serial mice tested and met their current and voltage requirements. VCC 0.1µF VCC C1+ C1 C1C2+ C2 C2- V+ MAX3222E MAX3232E MAX3237E MAX3241E MAX3246E V- C3 C4 T1IN 5V/div T1OUT 5V/div 5V/div R1OUT VCC = 3.3V, C1–C4 = 0.1µF T_ OUT T_ IN 2µs/div Figure 9. MAX3241E Loopback Test Result at 250kbps R_ IN R_ OUT 5kΩ 1000pF GND +5V T_IN 0 +5V Figure 7. Loopback Test Circuit T_OUT 5kΩ + 250pF 0 -5V +5V 5V/div T1IN VCC = 3.3V C1–C4 = 0.1µF R_OUT 0 400ns/div 5V/div T1OUT R1OUT 5V/div VCC = 3.3V C1–C4 = 0.1µF Figure 10. MAX3237E Loopback Test Result at 1000kbps (MBAUD = VCC) 2µs/div Figure 8. MAX3241E Loopback Test Result at 120kbps www.maximintegrated.com Maxim Integrated │  14 MAX3222E/MAX3232E/ MAX3237E/MAX3241E/ MAX3246E ±15kV ESD-Protected, Down to 10nA, 3.0V to 5.5V, Up to 1Mbps, True RS-232 Transceivers Figure 6a shows the transmitter output voltages under increasing load current at +3.0V. Figure 6b shows a typical mouse connection using the MAX3241E. High Data Rates The MAX3222E/MAX3232E/MAX3237E/MAX3241E/ MAX3246E maintain the RS-232 ±5V minimum transmitter output voltage even at high data rates. Figure 7 shows a transmitter loopback test circuit. Figure 8 shows a loopback test result at 120kbps, and Figure 9 shows the same test at 250kbps. For Figure 8, all transmitters were driven simultaneously at 120kbps into RS-232 loads in parallel with 1000pF. For Figure 9, a single transmitter was driven at 250kbps, and all transmitters were loaded with an RS-232 receiver in parallel with 1000pF. The MAX3237E maintains the RS-232 ±5.0V minimum transmitter output voltage at data rates up to 1Mbps. Figure 10 shows a loopback test result at 1Mbps with MBAUD = VCC. For Figure 10, all transmitters were loaded with an RS-232 receiver in parallel with 250pF. Interconnection with 3V and 5V Logic UCSP Reliability The UCSP represents a unique packaging form factor that may not perform equally to a packaged product through traditional mechanical reliability tests. UCSP reliability is integrally linked to the user’s assembly methods, circuit board material, and usage environment. The user should closely review these areas when considering use of a UCSP package. Performance through Operating Life Test and Moisture Resistance remains uncompromised as the wafer-fabrication process primarily determines it. Mechanical stress performance is a greater consideration for a UCSP package. UCSPs are attached through direct solder contact to the user’s PC board, foregoing the inherent stress relief of a packaged product lead frame. Solder joint contact integrity must be considered. Table 4 shows the testing done to characterize the UCSP reliability performance. In conclusion, the UCSP is capable of performing reliably through environmental stresses as indicated by the results in the table. Additional usage data and recommendations are detailed in Application Note 1891: Wafer-Level Packaging (WLP) and Its Applications. The MAX3222E/MAX3232E/MAX3237E/MAX3241E/ MAX3246E can directly interface with various 5V logic families, including ACT and HCT CMOS. See Table 3 for more information on possible combinations of interconnections. Table 4. Reliability Test Data TEST Temperature Cycle Operating Life DURATION FAILURES PER SAMPLE SIZE TA = -35°C to +85°C, TA = -40°C to +100°C 150 cycles, 900 cycles 0/10, 0/200 TA = +70°C TA = -20°C CONDITIONS 240 hours 0/10 TA = +20°C to +60°C, 90% RH 240 hours 0/10 240 hours 0/10 TA = -10°C 24 hours 0/10 8-hour steam age — 0/15 ESD ±15kV, Human Body Model — 0/5 High-Temperature Operating Life TJ = +150°C 168 hours 0/45 Moisture Resistance Low-Temperature Storage Low-Temperature Operational Solderability www.maximintegrated.com Maxim Integrated │  15 MAX3222E/MAX3232E/ MAX3237E/MAX3241E/ MAX3246E ±15kV ESD-Protected, Down to 10nA, 3.0V to 5.5V, Up to 1Mbps, True RS-232 Transceivers Pin Configurations TOP VIEW + C1+ 2 20 SHDN N.C. 1 19 VCC 20 N.C. C1+ 1 C1+ 2 19 VCC V+ 2 18 GND C1- 3 17 T1OUT C2+ 4 16 R1IN C2- 5 V+ 3 16 GND V+ 3 18 GND V+ 3 C1- 4 15 T1OUT C1- 4 17 T1OUT C1- 4 14 R1IN C2+ 5 16 R1IN C2+ 5 C2- 6 13 R1OUT V- 7 12 T1IN V- 7 T2OUT 8 11 T2IN R2IN 9 10 R2OUT MAX3232E 15 R1OUT C2- 6 V- 6 11 T1IN 14 T1IN T2OUT 7 10 T2IN T2OUT 8 13 T1IN T2OUT 8 13 T2IN R2IN 8 R2IN 9 12 T2IN R2IN 9 12 R2OUT R2OUT 10 11 N.C. N.C. 10 11 N.C. 4 25 C1- R1IN 4 25 GND R1IN 1 T1OUT 5 24 T1IN R2IN 5 24 C1- R2IN 23 EN R3IN MAX3237E 23 T2IN 6 R3IN 6 MAX3241E N.C. V- VCC 26 VCC 25 27 V+ 3 26 2 V- V+ C2- 26 VCC C1+ 27 V+ 3 27 2 T2OUT 28 C1+ TOP VIEW 1 C2- SO/DIP/SSOP/TSSOP 28 + 9 R2OUT TSSOP C2+ GND 13 R1IN 12 R1OUT C2+ + 14 T1OUT V- 7 15 R1OUT 28 C1+ 1 MAX3232E 14 N.C. C2- 6 TSSOP/SSOP C2+ 15 GND C2- SO/DIP MAX3222E 16 VCC 29 MAX3222E + V- C2+ 5 + 30 17 VCC C1+ 2 EN 1 31 18 SHDN N.C. + 32 EN 1 + 24 GND 2 23 C1- 3 22 EN R4IN 4 21 SHDN T3OUT 7 22 T3IN R4IN 7 22 SHDN R1IN 8 21 R1OUT R5IN 8 21 R1OUTB R5IN 5 20 R1OUTB 20 R2OUTB T1OUT 6 19 R2OUTB 18 R1OUT 17 R2OUT SSOP 15 T1IN 14 16 SHDN 14 N.C. 16 R4OUT 15 R5OUT 15 MBAUD R3OUT 17 R3OUT T2IN 13 14 T3IN 12 16 R1OUTB 13 17 T5IN R4OUT EN 13 R5OUT T5OUT 12 *EP 12 8 T1IN 7 T3OUT 11 T2OUT 18 R2OUT 10 19 R1OUT T2IN R3IN 11 T3IN T2OUT 10 18 R3OUT T3OUT 11 19 T4IN T4OUT 10 9 9 20 R2OUT T1OUT 9 N.C. R2IN MAX3241E SSOP/SO/TSSOP *CONNECT EP TO GND. www.maximintegrated.com TQFN Maxim Integrated │  16 MAX3222E/MAX3232E/ MAX3237E/MAX3241E/ MAX3246E ±15kV ESD-Protected, Down to 10nA, 3.0V to 5.5V, Up to 1Mbps, True RS-232 Transceivers 12 11 GND 16 10 T2IN VCC 17 9 N.C. 8 R2OUT 7 R2IN 6 T2OUT MAX3222E SHDN 18 EN 19 *EP 11 10 9 GND 13 VCC 14 MAX3232E V+ 15 *EP 3 4 5 1 2 3 4 C1- C2+ C2- V- + V- C1+ 16 C2- 2 12 C2+ 1 C1- + C1+ V+ 20 T1IN T1IN 13 R1OUT N.C. 14 R1IN R1OUT 15 TOP VIEW T1OUT R1IN TOP VIEW T1OUT Pin Configurations (continued) TQFN 8 T2IN 7 R2OUT 6 R2IN 5 T2OUT TQFN TOP VIEW (BUMPS ON BOTTOM) B2: SHDN C2: R1OUT D2: T3IN E2: T2IN B3: EN E3: T1IN BUMPS B4, B5, C3, C4, C5, D3, D4, D5, E4, AND E5 NOT POPULATED + R4OUT R5OUT R1IN R2IN A4 A5 R3OUT A1 A2 A3 R2OUT B1 B2 B3 V- C1 C2 C2- D1 D2 C2+ E1 E2 E3 V+ F1 F2 F3 F4 F5 VCC C1+ C1- GND A6 R3IN B6 R4IN C6 R5IN MAX3246E D6 T3OUT E6 T2OUT F6 T1OUT UCSP *CONNECT EP TO GND. www.maximintegrated.com Maxim Integrated │  17 MAX3222E/MAX3232E/ MAX3237E/MAX3241E/ MAX3246E ±15kV ESD-Protected, Down to 10nA, 3.0V to 5.5V, Up to 1Mbps, True RS-232 Transceivers Typical Operating Circuits +3.3V +3.3V 17 CBYPASS C1 0.1µF C2 0.1µF 2 C1+ 4 5 6 C1- VCC MAX3222E C2+ V- C3* 0.1µF C1 0.1µF C4 0.1µF C2 0.1µF 7 T1OUT 15 T2OUT 8 11 T2IN 5kΩ 10 R2OUT R2IN 9 1 C1+ 3 4 5 C1- VCC RS-232 OUTPUTS TTL/CMOS INPUTS V+ MAX3232E C2+ V- TTL/CMOS OUTPUTS GND SHDN 6 T2OUT 7 10 T2IN C4 0.1µF RS-232 OUTPUTS R1IN 13 5kΩ 9 R2OUT R2IN 8 5kΩ 1 EN C3* 0.1µF T1OUT 14 12 R1OUT RS-232 INPUTS 2 C2- 11 T1IN R1IN 14 13 R1OUT TTL/CMOS OUTPUTS 3 C2- 12 T1IN TTL/CMOS INPUTS V+ 16 CBYPASS RS-232 INPUTS 5kΩ 18 16 GND 15 *C3 CAN BE RETURNED TO EITHER VCC OR GROUND. NOTE: PIN NUMBERS REFER TO SO/DIP PACKAGES. MAX3222E PINOUT REFERS TO SO/DIP PACKAGES. MAX3232E PINOUT REFERS TO TSSOP/SSOP/SO/DIP PACKAGES www.maximintegrated.com SEE TABLE 2 FOR CAPACITOR SELECTION. Maxim Integrated │  18 MAX3222E/MAX3232E/ MAX3237E/MAX3241E/ MAX3246E ±15kV ESD-Protected, Down to 10nA, 3.0V to 5.5V, Up to 1Mbps, True RS-232 Transceivers Typical Operating Circuits (continued) +3.3V +3.3V CBYPASS 0.1µF 28 C1+ 25 1 0.1µF 3 C1- VCC V+ MAX3237E C2+ V- 27 C3* 0.1µF 4 0.1µF C2- 24 T1IN 23 T2IN LOGIC INPUTS CBYPASS 26 22 T3IN 19 T4IN T1 T2 T3 T4 17 T5IN T5 C1 0.1µF C2 0.1µF T1OUT 5 T2OUT 6 T3OUT 7 TTL/CMOS INPUTS RS-232 OUTPUTS 28 C1+ 24 1 2 C1- 26 VCC V+ MAX3241E C2+ V- 20 R2OUT C4 0.1µF 14 T1IN T1OUT 9 13 T2IN T2OUT 10 12 T3IN T3OUT 11 RS-232 OUTPUTS 20 R2OUTB T5OUT 12 19 R1OUT R1IN 4 5kΩ R2IN R2 9 R3IN 11 R3 R2IN 18 R2OUT R1IN 8 R1 5kΩ 18 R3OUT 3 21 R1OUTB T4OUT 10 5kΩ LOGIC OUTPUTS C3* 0.1µF C2- 16 R1OUTB 21 R1OUT 27 RS-232 INPUTS TTL/CMOS OUTPUTS 5kΩ 17 R3OUT R3IN 6 5kΩ 16 R4OUT 5kΩ 15 R5OUT MBAUD GND SHDN RS-232 INPUTS R4IN 7 5kΩ 13 EN 5 R5IN 8 15 14 5kΩ 23 EN 2 GND SHDN 22 25 *C3 CAN BE RETURNED TO EITHER VCC OR GROUND. www.maximintegrated.com Maxim Integrated │  19 MAX3222E/MAX3232E/ MAX3237E/MAX3241E/ MAX3246E ±15kV ESD-Protected, Down to 10nA, 3.0V to 5.5V, Up to 1Mbps, True RS-232 Transceivers Typical Operating Circuits (continued) +3.3V CBYPASS C1 0.1µF C2 0.1µF TTL/CMOS INPUTS F3 C1+ F4 C1E1 D1 F2 VCC V+ MAX3246E C2+ V- F1 C3* 0.1µF C1 C4 0.1µF C2- E3 T1IN T1OUT F6 E2 T2IN T2OUT E6 D2 T3IN T3OUT D6 C2 R1OUT RS-232 OUTPUTS R1IN A4 5kΩ R2IN B1 R2OUT A5 5kΩ TTL/CMOS OUTPUTS A1 R3OUT R3IN A6 5kΩ A2 R4OUT RS-232 INPUTS R4IN B6 5kΩ A3 R5OUT R5IN C6 5kΩ B3 EN GND SHDN B2 F5 *C3 CAN BE RETURNED TO EITHER VCC OR GROUND. www.maximintegrated.com Maxim Integrated │  20 MAX3222E/MAX3232E/ MAX3237E/MAX3241E/ MAX3246E ±15kV ESD-Protected, Down to 10nA, 3.0V to 5.5V, Up to 1Mbps, True RS-232 Transceivers Ordering Information (continued) PART TEMP RANGE PIN-PACKAGE MAX3232ECTE+ 0°C to +70°C 16 TQFN-EP** (5mm x 5mm) MAX3232ECUE+ 0°C to +70°C 16 TSSOP MAX3232ECUP+ 0°C to +70°C 20 TSSOP MAX3232ECSE+ 0°C to +70°C 16 SOIC MAX3232EESE+ -40°C to +85°C 16 SOIC MAX3232EEAE+ -40°C to +85°C 16 SSOP MAX3232EEWE+ -40°C to +85°C 16 Wide SO MAX3232EEPE+ -40°C to +85°C 16 Plastic DIP MAX3232EETE+ -40°C to +85°C 16 TQFN-EP** (5mm x 5mm) MAX3232EEUE+ -40°C to +85°C 16 TSSOP MAX3232EEUP+ -40°C to +85°C 20 TSSOP MAX3237ECAI+ 0°C to +70°C 28 SSOP MAX3237EEAI+ -40°C to +85°C 28 SSOP MAX3241ECAI+ 0°C to +70°C 28 SSOP MAX3241ECWI+ 0°C to +70°C 28 Wide SO MAX3241ECUI+ 0°C to +70°C 28 TSSOP MAX3241ECTJ+ 0°C to +70°C 32 TQFN-EP** (7mm x 7mm) MAX3241EEAI+ -40°C to +85°C 28 SSOP MAX3241EEWI+ -40°C to +85°C 28 Wide SO MAX3241EEUI+ -40°C to +85°C 28 TSSOP MAX3246ECBX-T+ 0°C to +70°C 6 x 6 UCSP† MAX3246EEBX-T+ -40°C to +85°C 6 x 6 UCSP† +Denotes a lead(Pb)-free/RoHS-compliant package. †Requires solder temperature profile described in the Absolute Maximum Ratings section. UCSP Reliability is integrally linked to the user’s assembly methods, circuit board material, and environment. Refer to the UCSP Reliability Notice in the UCSP Reliability section of this datasheet for more information. **EP = Exposed pad. Chip Information PROCESS: BiCMOS www.maximintegrated.com Selector Guide PART NO. OF LOWGUARANTEED DRIVERS/ POWER DATA RATE RECEIVERS SHUTDOWN (bps) MAX3222E 2/2 P 250k MAX3232E 2/2 — 250k MAX3237E (Normal) 5/3 P 250k MAX3237E (MegaBaud) 5/3 P 1M MAX3241E 3/5 P 250k MAX3246E 3/5 P 250k 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 OUTLINE NO. LAND PATTERN NO. 90-0010 T2055+5 21-0140 20 TSSOP H20+2 21-0066 90-0116 20 SSOP A20+1 21-0056 90-0094 18 Wide SO W18+1 21-0042 90-0181 18 PDIP P18+5 21-0043 — 16 SOIC S16 +1 21-0041 90-0097 16 SSOP A16+2 21-0056 90-0106 16 Wide SO W16+3 21-0042 90-0107 16 PDIP P16+1 21-0043 — 16 TQFN T1655+2 21-0140 90-0072 20 TQFN 16 TSSOP U16+1 21-0066 90-0117 28 SSOP A28+1 21-0056 90-0095 28 Wide SO W28+6 21-0042 90-0109 28 TSSOP U28+2 21-0066 90-0171 32 TQFN T3277+2 21-0144 90-0125 6x6 HCSP B36+3 21-0082 Refer to Application Note 1891 Maxim Integrated │  21 MAX3222E/MAX3232E/ MAX3237E/MAX3241E/ MAX3246E ±15kV ESD-Protected, Down to 10nA, 3.0V to 5.5V, Up to 1Mbps, True RS-232 Transceivers Revision History REVISION NUMBER REVISION DATE PAGES CHANGED 11 10/07 Corrected Package Information 22–28 12 12/10 Changed all parts to lead free in the Ordering Information, added automotive qualified part to Ordering Information, corrected capacitor in Typical Operating Circuits 1, 19 13 12/18 Updated Ordering Information and Package Information tables DESCRIPTION 21 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. ©  2018 Maxim Integrated Products, Inc. │  22