MAX3188EUT-T

19-1628; Rev 0; 2/00 1Mbps, 1µA RS-232 Transmitters in SOT23-6 Features ♦ Small 6-Pin SOT23 Package ♦ 150µA Supply Current ♦ Shutdown Reduces Supply Current to 1µA ♦ Guaranteed Data Rate 1Mbps (MAX3189) 250kbps (MAX3188) ♦ Three-State RS-232 Transmitter Output ♦ No External Components Required Ordering Information Applications Diagnostic Ports TOP MARK PART TEMP. RANGE PIN-PACKAGE Networking Equipment MAX3188EUT-T -40°C to +85°C 6 SOT23-6 AAHJ Set-Top Boxes MAX3189EUT-T -40°C to +85°C 6 SOT23-6 AAHK Telecommunications Digital Cameras Hand-Held Equipment Pin Configuration Typical Operating Circuit 1 +5.4V 6 TOP VIEW SHDN VEE VCC CBYPASS1 0.1µF 5 GND 2 TOUT 4 GND 2 SHDN 1 CBYPASS2 0.1µF MAX3188 MAX3189 3 TIN -5.4V MAX3188 MAX3189 TIN 3 6 VCC 5 VEE 4 TOUT SOT23-6 CAPACITORS MAY BE POLARIZED OR UNPOLARIZED. ________________________________________________________________ Maxim Integrated Products 1 For free samples and the latest literature, visit www.maxim-ic.com or phone 1-800-998-8800. For small orders, phone 1-800-835-8769. MAX3188/MAX3189 General Description The MAX3188/MAX3189 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. RS-232 data transmission is guaranteed up to 250kbps with the MAX3188 and up to 1Mbps with the MAX3189. The MAX3188/MAX3189 transmitters are inverting level translators that convert CMOS-logic levels to 5V EIA/TIA-232 levels. They feature a shutdown input that reduces current consumption to only 1µA and forces the transmitter output into a high-impedance state. The MAX3188/MAX3189 transmitters have a standard inverting output. MAX3188/MAX3189 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 +160°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 6 V DC CHARACTERISTICS 4.5 Positive Supply Voltage VCC Negative Supply Voltage VEE Positive Supply Current ICC V SHDN = 5V Negative Supply Current IEE V SHDN = 5V Shutdown Supply Current -6 110 45 V 170 µA 34 0.2 V SHDN = 0 -4.5 µA 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 VCC = 4.5V, VEE = -4.5V, RL = 3kΩ ±3.7 VCC = 5.4V, VEE = -5.4V, RL = 3kΩ ±5 RTOUT VCC = VEE = 0, VTOUT = ±2V 300 ITOUT VOUT = ±12V; VCC = VEE = 0 or VCC = +5.4V, VEE = -5.4V; SHDN = 0 Output Voltage Swing VTOUT Output Resistance Ω ±35 Output Short-Circuit Current Output Leakage Current V ±60 mA ±25 µA TIMING CHARACTERISTICS RL = 3kΩ, CL = 1000pF Maximum Data Rate Transmitter Skew tTS 0.25 MAX3189EUT 1 Mbps MAX3188EUT 100 MAX3189EUT 25 RL = 3kΩ to 7kΩ, CL = 150pF to 1000pF, MAX3188EUT measured from -3V to +3V or +3V to -3V, VCC = 5.4V, VEE = MAX3189EUT -5.4V, TA = +25°C Transition-Region Slew Rate Transmitter Enable Time |tPHL - tPLH|, Figure 1 MAX3188EUT 6 30 V/µs 24 tEN 150 2 Note 2: All devices are 100% tested at TA = +25°C. All limits over temperature are guaranteed by design. 2 ns _______________________________________________________________________________________ µs 1Mbps, 1µA RS-232 Transmitters in SOT23-6 IEE (MAX3189) 1.0 IEE (MAX3188) 5 4 3 MAX3189 2 1.5 40kbps 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1.0 0 500 1000 2000 2500 DATA RATE (Mbps) OUTPUT CAPACITANCE (pF) MAX3189 SUPPLY CURRENT vs. OUTPUT CAPACITANCE MAX3188 SLEW RATE vs. OUTPUT CAPACITANCE MAX3189 SLEW RATE vs. OUTPUT CAPACITANCE 6 240kbps 8 +SLEW 6 4 4 80 70 SLEW RATE (V/µs) 500kbps -SLEW 10 MAX3188/9 toc06 12 SLEW RATE (V/µs) 10 90 MAX3188/9 toc05 1Mbps 8 14 MAX3188/9 toc04 12 60 50 40 -SLEW 30 +SLEW 20 40kbps 2 2 10 0 0 0 1500 DATA RATE (Mbps) 14 SUPPLY CURRENT (mA) 120kbps 2.0 0 0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1.0 2.5 0.5 0 0 3.0 1.0 1 0 250kbps 3.5 MAX3188 0.5 MAX3188/9 toc03 MAX3188/9 toc02 4.0 SUPPLY CURRENT (mA) SUPPLY CURRENT (mA) ICC (MAX3188) 1.5 6 SUPPLY CURRENT (mA) ICC (MAX3189) 2.0 7 MAX3188/9 toc01 2.5 MAX3188 SUPPLY CURRENT vs. OUTPUT CAPACITANCE SUPPLY CURRENT vs. DATA RATE (CL = 1000pF) SUPPLY CURRENT vs. DATA RATE (CL = 150pF) 500 1000 1500 2000 0 0 2500 500 1000 1500 2000 0 2500 500 OUTPUT CAPACITANCE (pF) OUTPUT CAPACITANCE (pF) MAX3188 TRANSMITTER OUTPUT SHUTDOWN WAVEFORM SHDN 2500 MAX3188/9 toc08 +2V SHDN 0 +5V 0 +5V TOUT 0 -5V 1µs/div 2000 CL = 150pF +2V 0 TOUT 1500 MAX3189 TRANSMITTER OUTPUT SHUTDOWN WAVEFORM MAX3188/9 toc07 CL = 150pF 1000 OUTPUT CAPACITANCE (pF) -5V 1µs/div _______________________________________________________________________________________ 3 MAX3188/MAX3189 Typical Operating Characteristics (VCC = +5.4V, VEE = -5.4V, RL = 3kΩ, TA = +25°C, unless otherwise noted.) MAX3188/MAX3189 1Mbps, 1µA RS-232 Transmitters in SOT23-6 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 TTL/CMOS Transmitter Input RS-232 Transmitter Output Detailed Description The transmitter is an inverting level translator that converts CMOS-logic levels to 5V EIA/TIA-232 levels. The MAX3188 guarantees a 250kbps data rate, and the MAX3189 guarantees a 1Mbps data rate with worst-case loads of 3kΩ in parallel with 1000pF. The transmitter input does not have a pull-up resistor and should be connected to GND if unused. Shutdown The MAX3188/MAX3189 feature a shutdown input. Drive SHDN low to reduce the supply current to 1µA (max). Shutdown also forces TOUT into a highimpedance state that allows the signal line to be safely controlled by other transmitters. Drive SHDN high for normal operation. 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. Applications Information +5V 50% TOUT 50% -5V tPLH tPHL VIH 50% TIN 50% VIL Figure 1. Transmitter Propagation-Delay Timing When using another RS-232 device containing an internal regulated charge pump (Table 1), the MAX3188/ MAX3189 may be powered from the internal charge pump (Figure 2). This eliminates the need for additional external DC-DC converters to generate the required ±4.5V to ±6V dual supplies. Power-Supply Sources The MAX3188/MAX3189 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 devices’ low current consumption, a charge pump can provide the proper supply voltages and requires a minimal amount of board space and cost. 4 _______________________________________________________________________________________ 1Mbps, 1µA RS-232 Transmitters in SOT23-6 MAX3188/MAX3189 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 AutoShutdown and AutoShutdown Plus are trademarks of Maxim Integrated Products. _______________________________________________________________________________________ 5 MAX3188/MAX3189 1Mbps, 1µA RS-232 Transmitters in SOT23-6 +3V SUPPLY CBYPASS 0.1µF C3 0.1µF VCC C1+ V+ C1- V- VCC C1 0.1µF VEE C4 0.1µF C2+ SHDN MAX3188 MAX3189 C2 0.1µF C2TIN TOUT (TABLE 1) GND GND Figure 2. Powering the MAX3188/MAX3189 Chip Information TRANSISTOR COUNT: 111 6 _______________________________________________________________________________________ 1Mbps, 1µA RS-232 Transmitters in SOT23-6 6LSOT.EPS _______________________________________________________________________________________ 7 MAX3188/MAX3189 Package Information MAX3188/MAX3189 1Mbps, 1µA RS-232 Transmitters in SOT23-6 NOTES 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.