460kbps, 1µA, RS-232-Compatible Transceiver MAX3314 powered EIA/T

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460kbps, 1µA, RS-232-Compatible Transceiver MAX3314 powered EIA/T

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19-1696; 4/00
460kbps, 1µA, RS-232-Compatible Transceiver
MAX3314 powered EIA/TIA-232-compatible interface. transmitter receiver flow-through architecture. transmitter lowdropout output stage providing minimum RS-232-compatible ±3.7V output levels while driving 1000pf 460kbps. Both supplied externally. MAX3314 SHDN function that reduces supply current 1µA. transmitter disabled into 3-state mode while receiver remains active. MAX3314 available 8-pin µMAX packages. 30µA Operating Supply Current 460kbps (min) Data Rate 8-Pin µMAX Package RS-232-Compatible Levels
Features
Low-Power Shutdown with Receiver Active
MAX3314
Ordering Information
PART MAX3314CUA MAX3314CSA MAX3314EUA MAX3314ESA TEMP. RANGE +70°C +70°C -40°C +85°C -40°C +85°C PIN-PACKAGE µMAX µMAX
_Applications
Digital Cameras Telecommunications Handy Terminals Set-Top Boxes
Typical Operating Circuit
CBYPASS 0.1µF SHDN 0.1µF
Configuration
VIEW
MAX3314
TOUT
SHDN
VRIN TOUT
ROUT
MAX3314
ROUT
µMAX/SO
CAPACITORS POLARIZED UNPOLARIZED.
Maxim Integrated Products
free samples latest literature, visit www.maxim-ic.com phone 1-800-998-8800. small orders, phone 1-800-835-8769.
460kbps, 1µA, RS-232-Compatible Transceiver MAX3314
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 µMAX (derate 4.1mW/°C above +70°C) .300mW 8-Pin (derate 5.88mW/°C above +70°C).471mW Operating Temperature Ranges MAX3314C_A.0°C +70°C MAX3314E_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, unless otherwise noted. 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 Transmitter output loaded with ground transmitter output ±3.7 IOUT 1.6mA IOUT -1.0mA ±0.01 SYMBOL CONDITIONS UNITS
VSHDN VCC, load SHDN VCC, load SHDN
4.75 -4.75
5.25 -5.25
Note tested-guaranteed design.
460kbps, 1µA, RS-232-Compatible Transceiver
TIMING CHARACTERISTICS
(VCC +5V, -5V, TMIN TMAX, unless otherwise noted. 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 from SYMBOL CONDITIONS =1000pf, transmitter switching Receiver input receiver output, 150pF Receiver input receiver output, 150pF 0.15 0.15 V/µs UNITS kbps
MAX3314
Typical Operating Characteristics
(VCC +5V, -5V, 250kbps data rate, transmitter loaded with +25°C, unless otherwise noted.)
SLEW RATE LOAD CAPACITANCE
MAX3314-01
TRANSMITTER OUTPUT VOLTAGE LOAD CAPACITANCE
1000 1500 2000 2500 3000
MAX3314-02
SUPPLY CURRENT LOAD CAPACITANCE
SUPPLY CURRENT (mA) 1000 1500 2000 2500 3000 20kbps 120kbps 460kbps 250kbps
MAX3314-03
SLEW RATE (V/us) 1000 1500 2000 2500 SLEW+ SLEW-
TRANSMITTER OUTPUT VOLTAGE
20kbps/120kbps
460kbps/250kbps
20kbps/120kbps
460kbps/250kbps
3000
LOAD CAPACITANCE (pF)
LOAD CAPACITANCE (pF)
LOAD CAPACITANCE (pF)
Description
NAME SHDN ROUT TOUT VGND FUNCTION External Power Supply. Decouple with 0.1µF capacitor ground. Shutdown Active Low. OFF, 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
460kbps, 1µA, RS-232-Compatible Transceiver MAX3314
Detailed Description
RS-232-Compatible Drivers
transmitter inverting level translator that converts CMOS-logic levels EIA/TIA-232-compatible levels. guarantees data rates 460kbps with worst-case loads parallel with 1000pF. When SHDN driven low, transmitter disabled into 3-state mode. transmitter input does have pull-up resistor. Connect ground unused.
5V/div SHDN
1.5V/div
TOUT
RS-232-Compatible Receivers
MAX3314's receiver converts RS-232 signals CMOS-logic output levels. receiver rated signals ±25V. MAX3314's receiver will remain active during shutdown mode.
1µs/div
MAX3314 Shutdown Mode
shutdown mode, transmitter output into high impedance. This reduces supply current 1µA. time required exit shutdown less than 2.5µs. Table shutdown logic truth table.
Figure Transmitter Output When Exiting Shutdown Powering
0.1µF SHDN V0.1µF TOUT
Table Shutdown Logic Truth Table
SHDN TRANSMITTER OUTPUT High-Z Active RECEIVER OUTPUT Active Active
MAX3314
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.
ROUT
1000pF
Transmitter Output When Exiting Shutdown
Figure shows transmitter output when exiting shutdown mode. transmitter loaded with parallel with 1000pF. transmitter output displays ringing undesirable transients MAX3314 comes shutdown. Note that transmitter enabled only when magnitude exceeds approximately -3V.
CAPACITORS POLARIZED NONPOLARIZED.
Figure Loopback Test Circuit
Figure shows transmitter loopback test circuit. Figure shows loopback test result 120kbps, Figure shows same test 250kbps.
High Data Rates
MAX3314 maintains minimum RS-232-compatible ±3.7V transmitter output voltage even high data rates.
Chip Information
TRANSISTOR COUNT:
460kbps, 1µA, RS-232-Compatible Transceiver MAX3314
TOUT
TOUT
ROUT
ROUT
5µs/div
2µs/div
Figure Loopback Test Results 120kbps
Figure Loopback Test Results 250kbps
Package Information
460kbps, 1µA, RS-232-Compatible Transceiver MAX3314
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 2000 Maxim Integrated Products Printed registered trademark Maxim Integrated Products.

460kbps, 1µA, RS-232-Compatible Transceiver MAX3314 powered EIA/T

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