±15kV ESD-Protected, 460kbps, 1µA, RS-232-Compatible Transceiver

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±15kV ESD-Protected, 460kbps, 1µA, RS-232-Compatible Transceiver

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19-1696; 3/01
±15kV ESD-Protected, 460kbps, 1µA, RS-232-Compatible Transceiver
MAX3314E ±5V-powered EIA/TIA-232-compatible interface. transmitter receiver flow-through architecture. transmitter output receiver input protected ±15kV using 1000-4-2 Air-Gap Discharge, ±8kV using 1000-4-2 Contact Discharge, ±15kV using Human Body Model. transmitter low-dropout output stage providing minimum RS-232-compatible ±3.7V output levels while driving 1000pF 460kbps. Both must supplied externally. MAX3314E SHDN function that reduces supply current 1µA. transmitter disabled into tristate while receiver remains active. MAX3314E available 8-pin µMAX, SOT23, packages.
Features
Protection RS-232 Pins ±15kV-Human Body Model ±8kV-IEC 1000-4-2 Contact Discharge ±15kV-IEC 1000-4-2 Air-Gap Discharge Low-Power Shutdown with Receiver Active 30µA Operating Supply Current 460kbps Guaranteed Data Rate 8-Pin SOT23 Package ±3.7V RS-232-Compatible Levels
MAX3314E
Ordering Information
PART MAX3314ECKA-T MAX3314ECUA MAX3314ECSA MAX3314EEKA-T MAX3314EEUA MAX3314EESA TEMP. RANGE +70°C +70°C +70°C -40°C +85°C -40°C +85°C -40°C +85°C PIN-PACKAGE SOT23-8 µMAX SOT23-8 µMAX
_Applications
Digital Cameras PDAs Telecommunications Handy-Terminals Set-Top Boxes
Typical Operating Circuit
CBYPASS 0.1µF SHDN 0.1µF TOUT
Configuration
VIEW
MAX3314E
SHDN
VRIN TOUT
MAX3314E
ROUT
ROUT
SOT23/µMAX/SO
CAPACITORS POLARIZED NONPOLARIZED.
Maxim Integrated Products
pricing, delivery, ordering information, please contact Maxim/Dallas Direct! 1-888-629-4642, visit Maxim's website www.maxim-ic.com.
±15kV ESD-Protected, 460kbps, 1µA, RS-232-Compatible Transceiver MAX3314E
ABSOLUTE MAXIMUM RATINGS
.-0.3V .+0.3V Input Voltages TIN, SHDN .-0.3V .±25V Output Voltages TOUT GND.±13.2V ROUT .-0.3V (VCC 0.3V) Short-Circuit Duration TOUT .Continuous Continuous Power Dissipation 8-Pin SOT23 (derate 9.7mW/°C above +70°C).777mW 8-Pin µMAX (derate 4.1mW/°C above +70°C) .300mW 8-Pin (derate 5.88mW/°C above +70°C).471mW Operating Temperature Ranges MAX3314EC_A .0°C +70°C MAX3314EE_A.-40°C +85°C Junction Temperature .+150°C Storage Temperature Range .-65°C +150°C Lead Temperature (soldering, 10s) .+300°C
Stresses beyond those listed under "Absolute Maximum Ratings" cause permanent damage device. These stress ratings only, functional operation device these other conditions beyond those indicated operational sections specifications implied. Exposure absolute maximum rating conditions extended periods affect device reliability.
ELECTRICAL CHARACTERISTICS
(VCC +5V, -5V, TMIN TMAX. Typical values +25°C.)
PARAMETER CHARACTERISTICS Positive Supply Operating Range Negative Supply Operating Range Positive Supply Current Negative Supply Current Shutdown Supply Current LOGIC INPUTS (TIN, SHDN) Input Logic Threshold Input Logic Threshold High Transmitter Input Hysteresis Input Leakage Current RECEIVER OUTPUT Output Voltage Output Voltage High RECEIVER INPUT Input Threshold Input Threshold High Input Hysteresis Input Resistance TRANSMITTER OUTPUT Output Voltage Swing Output Resistance (Note Output Short-Circuit Current Output Leakage Current VOUT ±12V, transmitter disabled Human Body Model ESD-Protection Voltage 1000-4-2 Air-Gap Discharge 1000-4-2 Contact Discharge PROTECTION (Transmitter Output, Receiver Input) Transmitter output loaded with ground transmitter output ±3.7 IOUT 1.6mA IOUT -1.0mA ±0.01 VSHDN VCC, load SHDN VCC, load SHDN 4.75 -4.75 5.25 -5.25 SYMBOL CONDITIONS UNITS
±15kV ESD-Protected, 460kbps, 1µA, RS-232-Compatible Transceiver
TIMING CHARACTERISTICS
(VCC +5V, -5V, TMIN TMAX. Typical values +25°C.)
PARAMETER Maximum Data Rate tPLH Receiver Propagation Delay tPHL Transmitter Skew Receiver Skew Transition Region Slew Rate 150pF 1000pF, measured from SYMBOL CONDITIONS 1000pF, transmitter switching Receiver input receiver output, 150pF Receiver input receiver output, 150pF 0.15 0.15 V/µs UNITS kbps
MAX3314E
Note tested, guaranteed design.
Typical Operating Characteristics
(VCC +5V, -5V, 250kbps data rate, transmitter loaded with +25°C, unless otherwise noted.)
TRANSMITTER OUTPUT VOLTAGE LOAD CAPACITANCE
MAX3314E-02 MAX3314E-01
SLEW RATE LOAD CAPACITANCE
SLEW RATE (V/µs) 1000 1500 2000 2500 3000 LOAD CAPACITANCE (pF) +SLEW -SLEW TRANSMITTER OUTPUT VOLTAGE
SUPPLY CURRENT LOAD CAPACITANCE
SUPPLY CURRENT (mA) 20kbps 250kbps 120kbps 460kbps
MAX3314E-03
20kbps/120kbps
460kbps/250kbps
20kbps/120kbps
460kbps/250kbps
1000
1500
2000
2500
3000
1000
1500
2000
2500
3000
LOAD CAPACITANCE (pF)
LOAD CAPACITANCE (pF)
±15kV ESD-Protected, 460kbps, 1µA, RS-232-Compatible Transceiver MAX3314E
Description
NAME SHDN ROUT TOUT VGND FUNCTION External Power Supply. Decouple with 0.1µF capacitor ground. Shutdown, Active off, on). TTL/CMOS Receiver Output TTL/CMOS Transmitter Input RS-232-Compatible Transmitter Output RS-232-Compatible Receiver Input External Power Supply. Decouple with 0.1µF capacitor ground. Ground
Detailed Description
RS-232-Compatible Drivers
transmitter inverting level translator that converts CMOS-logic levels ±3.7V EIA/TIA-232-compatible levels. guarantees data rates 460kbps with worst-case loads parallel with 1000pF. When SHDN driven low, transmitter disabled into tristate. transmitter input does have pullup resistor. Connect ground unused.
parallel with 1000pF. transmitter output displays ringing undesirable transients MAX3314E comes shutdown.
High Data Rates
MAX3314E maintains minimum RS-232-compatible ±3.7V transmitter output voltage even high data rates. Figure shows transmitter loopback test circuit. Figure shows loopback test result 120kbps, Figure shows same test 250kbps.
RS-232-Compatible Receivers
MAX3314E's receiver converts RS-232 signals CMOS-logic output levels. receiver rated receive signals ±25V. will remain active during shutdown mode.
±15kV Protection
with Maxim devices, ESD-protection structures incorporated pins protect against electrostatic discharges encountered during handling assembly. MAX3314E driver outputs receiver inputs have extra protection against static discharge. Maxim's engineers have developed state-of-the-art structures protect these pins against ±15kV without damage. structures withstand high states: normal operation, shutdown, powered down. After event, Maxim's versions keep working without latchup, whereas competing products latch must powered down remove latchup. protection tested various ways. transmitter outputs receiver inputs product family characterized protection following limits: ±15kV using Human Body Model ±8kV using Contact Discharge method specified 1000-4-2 ±15kV using 1000-4-2 Air-Gap method
MAX3314E Shutdown Mode
shutdown mode, transmitter output into high impedance (Table This reduces supply current 1µA. time required exit shutdown less than 2.5µs.
Applications Information
Capacitor Selection
capacitor type used critical proper operation; either polarized nonpolarized capacitors acceptable. polarized capacitors used, connect polarity shown Typical Operating Circuit. Bypass ground with least 0.1µF.
Transmitter Outputs When Exiting Shutdown
Figure shows transmitter output when exiting shutdown mode. transmitter loaded with
±15kV ESD-Protected, 460kbps, 1µA, RS-232-Compatible Transceiver MAX3314E
Table Shutdown Logic Truth Table
SHDN TRANSMITTER OUTPUT High Active RECEIVER OUTPUT Active Active
TOUT
ROUT 5V/div 5µs/div 1.5V/div SHDN
TOUT
Figure Loopback Test Result 120kbps
1µs/div
Figure Transmitter Outputs When Exiting Shutdown Powering
TOUT
0.1µF SHDN V0.1µF TOUT
2µs/div
ROUT
MAX3314E
Figure Loopback Test Result 250kbps
Test Conditions
performance depends variety conditions. Contact Maxim reliability report that documents test setup, test methodology, test results.
1000pF
ROUT
Human Body Model
Figure shows Human Body Model, Figure shows current waveform generates when discharged into impedance. This model consists 100pF capacitor charged voltage interest, which then discharged into test device through 1.5k resistor.
Figure Loopback Test Circuit
±15kV ESD-Protected, 460kbps, 1µA, RS-232-Compatible Transceiver MAX3314E
CHARGE-CURRENT LIMIT RESISTOR HIGHVOLTAGE SOURCE 100pF 1500 DISCHARGE RESISTANCE STORAGE CAPACITOR DEVICE UNDER TEST HIGHVOLTAGE SOURCE 100M CHARGE-CURRENT LIMIT RESISTOR 150pF DISCHARGE RESISTANCE STORAGE CAPACITOR DEVICE UNDER TEST
Figure Human Body Test Model
Figure 1000-4-2 Test Model
100% AMPERES
PEAK-TO-PEAK RINGING (NOT DRAWN SCALE)
100%
TIME CURRENT WAVEFORM
PEAK
36.8%
Figure Human Body Current Waveform
0.7ns 60ns
30ns
1000-4-2
1000-4-2 standard covers testing performance finished equipment; does specifically refer ICs. MAX3314E helps design equipment that meets Level (the highest level) 1000-4-2 without need additional ESD-protection components. major difference between tests done using Human Body Model 1000-4-2 higher peak current 1000-4-2 because series resistance lower 1000-4-2 model. Hence, withstand voltage measured 1000-4-2 generally lower than that measured using Human Body Model. Figure shows 1000-4-2 model, Figure shows current waveform 8kV, 1000-4-2, Level Contact Discharge test. Air-Gap test involves approaching device with charged probe. Contact Discharge method connects probe device before probe energized.
Figure 1000-4-2 Generator Current Waveform
contact that occurs with handling assembly during manufacturing. course, pins require this protection during manufacturing, just RS-232 inputs outputs. Therefore, after board assembly, Machine Model less relevant ports.
Chip Information
TRANSISTOR COUNT:
Machine Model
Machine Model tests pins using 200pF storage capacitor zero discharge resistance. objective emulate stress caused
±15kV ESD-Protected, 460kbps, 1µA, RS-232-Compatible Transceiver
Package Information
SOT23, 8L.EPS
MAX3314E
8LUMAXD.EPS
±15kV ESD-Protected, 460kbps, 1µA, RS-232-Compatible Transceiver MAX3314E
Package Information (continued)
SOICN.EPS
Maxim cannot assume responsibility circuitry other than circuitry entirely embodied Maxim product. circuit patent licenses implied. Maxim reserves right change circuitry specifications without notice time.
_Maxim Integrated Products, Gabriel Drive, Sunnyvale, 94086 408-737-7600 2001 Maxim Integrated Products Printed registered trademark Maxim Integrated Products.

±15kV ESD-Protected, 460kbps, 1µA, RS-232-Compatible Transceiver

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