LTC1385 Datasheet | Linear Technology

LTC1385 3.3V Low Power EIA/TIA-562 Transceiver Features s s s s s s s s DESCRIPTIO s s Operates from a Single 3.3V Supply Low Supply Current: ICC = 200µA ICC = 35µA in Driver Disable Mode ICC = 0.2µA in Shutdown Mode ESD Protection Over ±10k V Uses Small Capacitors: 0.1µF Operates to 120k Baud Output Overvoltage Does Not Force Current Back into Supplies EIA/TIA-562 I/O Lines Can Be Forced to ± 25V Without Damage Pin patible with LT1180A The LTC1385 is an ultra-low power, 2-driver/2-receiver EIA / TIA-562 transceiver which operates from a single 3.3V supply. The charge pump requires only four spacesaving 0.1µF capacitors. The transceiver operates in one of three modes: Normal, Driver Disable or Shutdown. In the Normal mode, ICC is only 200µA in the unloaded condition. In the Driver Disable mode, the charge pump is turned off, the driver outputs are forced into three-state, both receivers are kept active, and ICC drops to 35µA. In the Shutdown mode, everything is turned off and ICC drops to 0.2µA. The LTC1385 is fully pliant with all data rate and overvoltage EIA / TIA-562 specifications. The transceiver can operate up to 120kbaud with a 1000p F, 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 2-Drivers/2-Receivers with Shutdown and Driver Disable 2 0.1µF 0.1µF LOGIC INPUT 4 5 6 VCC 12 VCC LOGIC INPUT LOGIC OUTPUT LOGIC OUTPUT 11 13 10 5k 5k ON/OFF 18 1 DRIVER DISABLE - TA01 Quiescent and Shutdown Supply Current vs Temperature 600 1.2 1.0 SHUTDOWN CURRENT (µA) 17 LTC1385 3 7 300k 15 300k 8 14 9 VCC = 3.3V 0.1µF 562 OUTPUT 0.1µF QUIESCENT CURRENT (µA) 400 300 200 100 0 - 20 SHUTDOWN CURRENT 0 20 40 TEMPERATURE (°C) 60 QUIESCENT CURRENT 562 OUTPUT 562 INPUT 562 INPUT TEST CONDITION: VCC = 3.3V - TA02 0.8 0.6 0.4 0.2 0 80 LTC1385 ABSOLUTE AXI U RATI...