MAX3189EEUT-T

19-1604; Rev 1; 3/00 ±15kV ESD-Protected, 1Mbps, 1µA RS-232 Transmitters in SOT23-6 Features ♦ Small 6-Pin SOT23 Package ♦ ESD-Protected RS-232 Output ±15kV per Human Body Model ±8kV per IEC 1000-4-2, Contact Discharge ±15kV per IEC 1000-4-2, Air-Gap Discharge ♦ 150µA Operating Supply Current ♦ Shutdown Reduces Supply Current to 1µA ♦ Guaranteed Data Rate 1Mbps (MAX3189E) 250kbps (MAX3188E) ♦ Three-State RS-232 Transmitter Output ♦ No External Components Applications Ordering Information Diagnostic Ports Telecommunications Networking Equipment Set-Top Boxes PART TEMP. RANGE PINPACKAGE TOP MARK MAX3188EEUT-T -40°C to +85°C 6 SOT23-6 AAHD MAX3189EEUT-T -40°C to +85°C 6 SOT23-6 AAHE Digital Cameras Hand-Held Equipment Typical Operating Circuit Pin Configuration TOP VIEW 1 +5.4V 6 SHDN VEE VCC CBYPASS1 0.1µF 5 CBYPASS2 0.1µF MAX3188E MAX3189E 3 TIN TOUT 4 GND 2 -5.4V SHDN 1 GND 2 MAX3188E MAX3189E TIN 3 6 VCC 5 VEE 4 TOUT SOT23-6 CAPACITORS MAY BE POLARIZED OR UNPOLARIZED. ________________________________________________________________ Maxim Integrated Products 1 For price, delivery, and to place orders, please contact Maxim Distribution at 1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com. MAX3188E/MAX3189E General Description The MAX3188E/MAX3189E single RS-232 transmitters in a SOT23-6 package are for space- and cost-constrained applications requiring minimal RS-232 communications. These devices consume only 150µA of supply current from ±4.5V to ±6V supplies. They feature a shutdown input that reduces current consumption to only 1µA and forces the transmitter output into a high-impedance state. RS-232 data transmission is guaranteed up to 250kbps with the MAX3188E and up to 1Mbps with the MAX3189E. The MAX3188E/MAX3189E are EIA/TIA-232 transmitters that convert CMOS/TTL logic levels to RS-232-compliant signals. The transmitter output is protected to ±15kV using the IEC 1000-4-2 Air-Gap Discharge method, to ±8kV using the IEC 1000-4-2 Contact Discharge method, and to ±15kV per the Human Body Model, ensuring strict compliance with international standards. The MAX3188E/MAX3189E transmitters have a standard inverting output. MAX3188E/MAX3189E ±15kV ESD-Protected, 1Mbps, 1µA RS-232 Transmitters in SOT23-6 ABSOLUTE MAXIMUM RATINGS VCC to GND (Note 1) ................................................-0.3V to +7V VEE to GND (Note 1).................................................+0.3V to -7V VCC to VEE (Note 1) .............................................................+13V TIN, SHDN to GND ...................................................-0.3V to +7V TOUT to GND (SHDN = GND)..........................................±13.2V TOUT to GND (SHDN = VCC) ................................................±7V Output Short-Circuit Duration.....................................Continuous Continuous Power Dissipation (TA = +70°C) 6-Pin SOT23 (derate 8.7mW/°C above +70°C)..........691mW Operating Temperature Range ...........................-40°C to +85°C Junction Temperature ......................................................+150°C Storage Temperature Range .............................-65°C to +150°C Lead Temperature (soldering, 10s) .................................+300°C Note 1: VCC and VEE can have maximum magnitudes of 7V, but their absolute difference cannot exceed 13V. 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 = +4.5V to +6V, VEE = -4.5V to -6V, TA = TMIN to TMAX, unless otherwise noted. Typical values are at VCC = +5.4V, VEE = -5.4V, and TA = +25°C.) (Note 2) PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS V DC CHARACTERISTICS Positive Supply Voltage VCC 4.5 6 Negative Supply Voltage VEE -6 -4.5 V Positive Supply Current ICC V SHDN = 5V 170 µA Negative Supply Current IEE V SHDN = 5V Shutdown Supply Current 45 µA 0.2 V SHDN = 0 1 µA 0.8 V ±1 µA INPUT LOGIC (TIN, SHDN) Input Logic Threshold Low VIL Input Logic Threshold High VIH 2.0 V ±0.01 Input Leakage 100 TIN Input Hysteresis mV TRANSMITTER OUTPUTS Output Voltage Swing VTOUT Output Resistance RTOUT VCC = 4.5V, VEE = -4.5V, RL = 3kΩ ±3.7 VCC = 5.4V, VEE = -5.4V, RL = 3kΩ ±5 VCC = VEE = 0, VTOUT = ±2V 300 Ω ±35 Output Short-Circuit Current Output Leakage Current V ITOUT VOUT = ±12V; VCC = VEE = 0 or VCC = 5.4V, VEE = -5.4V; SHDN = 0 ±60 mA ±25 µA TIMING CHARACTERISTICS RL = 3kΩ, CL = 1000pF Maximum Data Rate Transmitter Skew tTS 2 0.25 MAX3189E 1 tEN Mbps MAX3188E 100 MAX3189E 25 RL = 3kΩ to 7kΩ, CL = 150pF to 1000pF, MAX3188E measured from -3V to +3V or +3V to -3V, VCC = 5.4V, VEE = MAX3189E -5.4V, TA = +25°C Transition-Region Slew Rate Transmitter Enable Time |tPHL - tPLH|, Figure 1 MAX3188E 6 ns 30 V/µs 24 150 2 _______________________________________________________________________________________ µs ±15kV ESD-Protected, 1Mbps, 1µA RS-232 Transmitters in SOT23-6 (VCC = +4.5V to +6V, VEE = -4.5V to -6V, TA = TMIN to TMAX, unless otherwise noted. Typical values are at VCC = +5.4V, VEE = -5.4V, and TA = +25°C.) (Note 2) PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS ESD PROTECTION ±15 IEC 1000-4-2 Air-Gap Discharge TOUT IEC 1000-4-2 Contact Discharge ±8 Human Body Model ±15 kV Note 2: All devices are 100% tested at TA = +25°C. All limits over temperature are guaranteed by design. Typical Operating Characteristics (VCC = +5.4V, VEE = -5.4V, RL = 3kΩ, TA = +25°C, unless otherwise noted.) IEE (MAX3189E) 1.0 IEE (MAX3188E) 5 4 3 MAX3189E 2 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1.0 120kbps 2.0 1.5 40kbps 0 0 0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1.0 500 1000 2000 2500 DATA RATE (Mbps) OUTPUT CAPACITANCE (pF) MAX3189E SUPPLY CURRENT vs. OUTPUT CAPACITANCE MAX3188E SLEW RATE vs. OUTPUT CAPACITANCE MAX3189E SLEW RATE vs. OUTPUT CAPACITANCE 6 240kbps 4 8 80 70 SLEW RATE (V/µs) 500kbps -SLEW 10 +SLEW 6 4 MAX3188E/9E toc06 12 SLEW RATE (V/µs) 10 90 MAX3188E/9E toc05 1Mbps 8 14 MAX3188E/9E toc04 12 60 50 40 -SLEW 30 +SLEW 20 40kbps 2 2 0 10 0 0 1500 DATA RATE (Mbps) 14 SUPPLY CURRENT (mA) 2.5 0.5 0 0 3.0 1.0 1 0 250kbps 3.5 MAX3188E 0.5 MAX3188E/9E toc03 MAX3188E/9E toc02 6 4.0 SUPPLY CURRENT (mA) ICC (MAX3188E) 1.5 7 SUPPLY CURRENT (mA) ICC (MAX3189E) 2.0 SUPPLY CURRENT (mA) MAX3188E/9E toc01 2.5 MAX3188E SUPPLY CURRENT vs. OUTPUT CAPACITANCE SUPPLY CURRENT vs. DATA RATE (CL = 1000pF) SUPPLY CURRENT vs. DATA RATE (CL = 150pF) 500 1000 1500 2000 OUTPUT CAPACITANCE (pF) 2500 0 0 500 1000 1500 2000 OUTPUT CAPACITANCE (pF) 2500 0 500 1000 1500 2000 2500 OUTPUT CAPACITANCE (pF) _______________________________________________________________________________________ 3 MAX3188E/MAX3189E ELECTRICAL CHARACTERISTICS (continued) MAX3188E/MAX3189E ±15kV ESD-Protected, 1Mbps, 1µA RS-232 Transmitters in SOT23-6 Typical Operating Characteristics (continued) (VCC = +5.4V, VEE = -5.4V, RL = 3kΩ, TA = +25°C, unless otherwise noted.) MAX3189E TRANSMITTER OUTPUT SHUTDOWN WAVEFORM MAX3188E TRANSMITTER OUTPUT SHUTDOWN WAVEFORM MAX3188E/9E toc07 MAX3188E/9E toc08 CL = 150pF CL = 150pF +2V SHDN 0 +2V SHDN 0 +5V +5V TOUT 0 TOUT 0 -5V -5V 1µs/div 1µs/div Pin Description PIN NAME FUNCTION 1 SHDN Active-Low Shutdown. Pull low to reduce the supply current and to force TOUT into a high-impedance state. 2 GND Ground 3 TIN 4 TOUT 5 VEE Negative Supply Voltage 6 VCC Positive Supply Voltage RS-232 Transmitter Output The MAX3188E/MAX3189E are EIA/TIA-232 transmitters that convert CMOS/TTL logic levels to RS-232 signals. They operate on ±4.5V to ±6V supplies and feature enhanced electrostatic discharge protection (see ESD Protection). The MAX3188E guarantees a 250kbps data rate, and the MAX3189E guarantees a 1Mbps data rate with worst-case loads of 3kΩ in parallel with 1000pF. The MAX3188E/MAX3189E invert the TOUT signal relative to TIN (standard RS-232). The transmitter input does not have a pull-up resistor and should be connected to GND if unused. 50% 50% -5V tPLH tPHL VIH TTL/CMOS Transmitter Input Detailed Description 4 +5V TOUT 50% TIN 50% VIL Figure 1. Transmitter Propagation-Delay Timing Shutdown The MAX3188E/MAX3189E feature a shutdown input. Drive SHDN low to reduce the supply current to 1µA (max). Shutdown also forces TOUT into a high-impedance state, allowing the signal line to be safely controlled by other transmitters. Drive SHDN high for normal operation. ESD Protection As with all Maxim devices, ESD protection structures are incorporated on all pins to protect against ESD encountered during handling and assembly. The MAX3188E/ MAX3189Es’ transmitter output has extra protection against static electricity. Maxim has developed state-ofthe-art structures enabling this pin to withstand ESD up _______________________________________________________________________________________ ±15kV ESD-Protected, 1Mbps, 1µA RS-232 Transmitters in SOT23-6 RC 1MΩ • ±15kV using the Human Body Model • ±8kV using the Contact Discharge method specified in IEC 1000-4-2 • ±15kV using the Air-Gap Discharge method specified in IEC 1000-4-2 CHARGE-CURRENT LIMIT RESISTOR HIGHVOLTAGE DC SOURCE Cs 100pF MAX3188E/MAX3189E to ±15kV without damage or latch-up. The MAX3188E/ MAX3189E’s transmitter output is characterized for protection to the following limits: RD 1500Ω DISCHARGE RESISTANCE DEVICE UNDER TEST STORAGE CAPACITOR Human Body Model Figure 2 shows the Human Body Model, and Figure 3 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, and then discharged into the test device through a 1.5kΩ resistor. Figure 2. Human Body ESD Test Model IEC 1000-4-2 The IEC 1000-4-2 standard covers ESD testing and performance of finished equipment; it does not specifically refer to ICs. The MAX3188E/MAX3189E enable the design of equipment that meets the highest level (Level 4) of IEC 1000-4-2 without the need for additional ESD-protection 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, the ESD withstand voltage measured to this standard is generally lower than that measured using the Human Body. Figure 4 shows the IEC 1000-4-2 model, and Figure 5 shows the current waveform for the ±8kV IEC 1000-4-2 Level 4 ESD Contact Discharge test. The Air-Gap test involves approaching the device with a charged probe. The Contact Discharge method connects the probe to the device before the probe is energized. IP 100% 90% Ir PEAK-TO-PEAK RINGING (NOT DRAWN TO SCALE) AMPERES 36.8% 10% 0 0 tRI TIME tDL CURRENT WAVEFORM Figure 3. Human Body Model Current Waveform RC 50MΩ TO 100MΩ Power-Supply Decoupling In most circumstances, 0.1µF bypass capacitors are adequate for power-supply decoupling. Connect the bypass capacitors as close to the IC as possible. CHARGE-CURRENT LIMIT RESISTOR HIGHVOLTAGE DC SOURCE Cs 150pF RD 330Ω DISCHARGE RESISTANCE STORAGE CAPACITOR DEVICE UNDER TEST Figure 4. IEC 1000-4-2 ESD Test Model _______________________________________________________________________________________ 5 Applications Information Power-Supply Sources I 100% 90% IPEAK MAX3188E/MAX3189E ±15kV ESD-Protected, 1Mbps, 1µA RS-232 Transmitters in SOT23-6 10% tR = 0.7ns TO 1ns t 30ns 60ns The MAX3188E/MAX3189E require ±4.5V to ±6V dual supplies. For applications where these supply voltages are not present, a DC-DC converter must be added. Due to the MAX3188E/MAX3189Es’ low current consumption, a charge pump can provide the proper supply voltages and requires a minimal amount of board space and cost. When using another RS-232 device containing an internal regulated charge pump (Table 1), the MAX3188E/ MAX3189E may be powered from the internal charge pump (Figure 6). This eliminates the need for additional external DC-DC converters to generate the required ±4.5V to ±6V dual supplies. Figure 5. IEC 1000-4-2 ESD Generator Current Waveform +3V SUPPLY CBYPASS 0.1µF C3 0.1µF VCC C1+ V+ C1- V- VCC C1 0.1µF VEE C4 0.1µF C2+ SHDN MAX3188E MAX3189E C2 0.1µF C2TIN TOUT (TABLE 1) GND GND Figure 6. Powering the MAX3188E/MAX3189E 6 _______________________________________________________________________________________ ±15kV ESD-Protected, 1Mbps, 1µA RS-232 Transmitters in SOT23-6 MAX3188E/MAX3189E Table 1. RS-232 Devices with Internal Regulated Charge Pumps PART NO. OF Tx/Rx MAX3221 1/1 MAX3221E 1/1 MAX3222 2/2 MAX3222E 2/2 MAX3223 2/2 MAX3223E 2/2 MAX3224 2/2 MAX3224E 2/2 MAX3225 2/2 MAX3225E 2/2 MAX3226 1/1 MAX3226E 1/1 MAX3227 1/1 MAX3227E 1/1 MAX3232 2/2 MAX3232E 2/2 MAX3237 5/3 MAX3238 5/3 MAX3241 3/5 MAX3241E 3/5 MAX3243 3/5 MAX3243E 3/5 MAX3244 3/5 MAX3244E 3/5 MAX3245 3/5 MAX3245E 3/5 ±15kV ESD PROTECTION AutoShutdown Plus™ ✓ AutoShutdown™ DATA RATE (bps) ✓ 120k ✓ 250k 120k ✓ 250k ✓ ✓ ✓ ✓ ✓ ✓ 120k ✓ 250k ✓ 250k ✓ 250k ✓ 1M ✓ 1M ✓ 250k ✓ 250k ✓ 1M ✓ 1M 120k ✓ 250k 1M ✓ 250k 120k ✓ 250k ✓ ✓ ✓ ✓ 120k ✓ 250k ✓ 250k ✓ 250k ✓ 1M ✓ 1M Chip Information TRANSISTOR COUNT: 111 AutoShutdown and AutoShutdown Plus are trademarks of Maxim Integrated Products. _______________________________________________________________________________________ 7 ±15kV ESD-Protected, 1Mbps, 1µA RS-232 Transmitters in SOT23-6 6LSOT.EPS MAX3188E/MAX3189E Package Information Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are implied. Maxim reserves the right to change the circuitry and specifications without notice at any time. 8 _____________________Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 © 2000 Maxim Integrated Products Printed USA is a registered trademark of Maxim Integrated Products.