LTC1385 Datasheet

• Operates from a Single 3.3V Supply
• Low Supply Current: I_CC = 200µA
• I_CC = 35µA in Driver Disable Mode
• I_CC = 0.2µA in Shutdown Mode
• ESD Protection Over ±10kV
• Uses Small Capacitors: 0.1µF
• Operates to 120kBaud
• Output Overvoltage Does Not Force Current Back into Supplies
• EIA/TIA-562 I/O Lines Can Be Forced to ±25V Without Damage
• Pin Compatible with LT 1180A

• Notebook Computers
• Palmtop Computers

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, I_CC 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 I_CC drops to 35µA. In the Shutdown mode, everything is turned off and I_CC drops to 0.2µA.

The LTC1385 is fully compliant with all data rate and overvoltage EIA/ TIA-562 specifications. The transceiver can operate up to 120kbaud with a 1000pF, 3kΩ load. Both driver outputs and receiver inputs can be forced to ±25V without damage, and can survive multiple ±10kV ESD strikes.