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LTC1347CS Datasheet(PDF) 1 Page - Linear Technology |
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LTC1347CS Datasheet(HTML) 1 Page - Linear Technology |
1 / 8 page 1 LTC1347 5V Low Power RS232 3-Driver/5-Receiver Transceiver with 5 Receivers Active in Shutdown S FEATURE DESCRIPTIO s Low Supply Current: 300 µA s Five Receivers Kept Alive in Shutdown s ESD Protection Over ±10kV s Operates from a Single 5V Supply s Uses Small Capacitors: 0.1 µF s Operates to 120kBaud s Three-State Outputs Are High Impedance When Off s Output Overvoltage Does Not Force Current Back into Supplies s RS232 I/O Lines Can Be Forced to ±25V Without Damage s Pin Compatible with LT1137 and LT1237 s Flowthrough Architecture The LTC1347 is a 3-driver/ 5-receiver RS232 transceiver with very low supply current. In the no load condition, the supply current is only 300 µA. The charge pump only requires four 0.1 µF capacitors. In Shutdown mode, all five receivers are kept alive and the supply current is 80 µA. All RS232 outputs assume a high impedance state in Shutdown and with the power off. The LTC1347 is fully compliant with all data rate and overvoltage RS232 specifications. The transceiver can operate up to 120kbaud with a 2500pF, 3k Ω load. Both driver outputs and receiver inputs can be forced to ±25V without damage, and can survive multiple ±10kV ESD strikes. S APPLICATI s Notebook Computers s Palmtop Computers 3-Drivers/5-Receivers with SHUTDOWN APPLICATI TYPICAL Quiescent and Shutdown Supply Current vs Temperature 1347 TA01 VCC C1 0.1 µF LTC1347 1 2 3 4 5 6 7 8 9 10 11 12 13 14 DRIVER 1 OUT RX1 IN DRIVER 2 OUT RX2 IN RX3 IN RX4 IN DRIVER 3 OUT RX5 IN ON/OFF NC 28 27 26 25 24 23 22 21 20 19 18 17 16 15 C3 0.1 µF DRIVER 1 IN RX1 OUT DRIVER 2 IN RX2 OUT RX3 OUT RX4 OUT DRIVER 3 IN RX5 OUT GND NC NC V– V+ C2 0.1 µF C4 0.1 µF TEMPERATURE (°C) 1200 1000 800 600 400 200 0 20 40 60 1347 TA02 80 0 –40 120 100 80 60 40 20 0 QUIESCENT CURRENT SHUTDOWN CURRENT TEST CONDITION: VCC = 5V, ALL DRIVER INPUTS TIED TO VCC. –20 100 |
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