DESCRIPTIO U
The LT ®1280A/LT1281A are dual RS232 driver/receiver pairs with integral charge pump to generate RS232 volt age levels from a single 5V supply. These circuits feature rugged bipolar design to provide operating fault tolerance and ESD protection unmatched by competing CMOS designs. Using only 0.1µF external capacitors, these cir cuits consume only 40mW of power, and can operate to 120kbaud even while driving heavy capacitive loads.

FEATURES
■ 10mA Max Supply Current
■ ESD Protection over ±10kV
■ Uses Small Capacitors: 0.1µF
■ 120kBaud Operation for RL = 3k, CL = 2500pF
■ 250kBaud Operation for RL = 3k, CL = 1000pF
■ Outputs Withstand ±30V Without Damage
■ CMOS Comparable Low Power: 40mW
■ Operates from a Single 5V Supply
■ Rugged Bipolar Design
■ Outputs Assume a High Impedance State When Off or Powered Down
■ Meets All RS232 Specifications
■ Available With or Without Shutdown
■ Absolutely No Latch-up
■ Available in SO Package

APPLICATIONS
■ Portable Computers
■ Battery-Powered Systems
■ Power Supply Generator
■ Terminals
■ Modems