LTC1350 Datasheet | Linear Technology

LTC1350 3.3V Low Power EIA/TIA-562 3-Driver/ 5-Receiver Transceiver Features s s DESCRIPTIO s s s s s s s s Low Supply Current 300µA Receivers 4 and 5 Kept Alive in SHUTDOWN 35µA ESD Protection ±10k V Operates from a Single 3.3V Supply Uses Small Capacitors 0.1µF Operates to 120k Baud Three-State Outputs are High Impedance When Off Output Overvoltage Does Not Force Current Back into Supplies EIA/TIA-562 I/O Lines Can Be Forced to ± 25V Without Damage Flowthrough Architecture The LTC1350 is a 3-driver/5-receiver EIA/TIA-562 transceiver with very low supply current. In the no load condition, the supply current is only 300µA. The charge pump only requires four 0.1µF capacitors. In SHUTDOWN mode, two receivers are kept alive and the supply current is only 35µA. All RS232 outputs assume a high impedance state in SHUTDOWN or with the power off. The LTC1350 is fully pliant with all data rate and overvoltage EIA/TIA-562 specifications. The transceiver can operate up to 120k baud with a 1000p F and 3kΩ load. Both driver outputs and receiver inputs can be forced to ± 25V without damage and can survive multiple ± 10k V ESD strikes. APPLICATI s s Notebook puters Palmtop puters TYPICAL APPLICATI V+ VCC C1+ C1- DR1 OUT RX1 IN DR2 OUT RX2 IN RX3 IN RX4 IN DR3 OUT RX5 IN ON/OFF NC 1 2 3 4 5 6 7 8 9 10 11 12 13 14 LTC1350 3-Drivers/5-Receivers with Shutdown 28 27 26 25 24 23 22 21 20 19 18 17 16 15 - TA01 Quiescent and Shutdown Supply Current vs Temperature 600 500 QUIESCENT CURRENT (µA) V- C2 + C2 - DR1 IN RX1 OUT DR2 IN RX2 OUT RX3 OUT RX4 OUT DR3 IN RX5 OUT GND NC NC TEST CONDITION: VCC = 3.3V ALL DRIVER INPUTS TIED TO VCC 400 300 200 100 0 - 40 - 20 85 75 65 55 45 SHUTDOWN CURRENT 35 0 100 SHUTDOWN CURRENT (µA) QUIESCENT CURRENT 40 20 60 0 TEMPERATURE (˚C) - TA02 LTC1350 ABSOLUTE AXI U RATI GS PACKAGE/ORDER I FOR ATIO TOP VIEW V+ C1+ C1- 1 3 4 28 V- 27 C2 + 26 C2 - 25 DR1 IN 24 RX1 OUT 23 DR2 IN 22 RX2 OUT 21 RX3 OUT...