DESCRIPTION
The LT®1237 is an advanced low power three driver, five receiver RS232 transceiver. Included on the chip is a shutdown pin for reducing supply current near zero. During shutdown one receiver remains active to detect incoming RS232 signals, for example, to wake up a system.

FEATURES
■ One Receiver Remains Active While in Shutdown
■ ESD Protection over ±15kV
■ Uses Small Capacitors: 0.1µF, 0.2µF, 1.0µF
■ 60µA Supply Current in Shutdown
■ Pin Compatible with LT1137A
■ 120kBaud Operation for RL = 3k, CL = 2500pF
■ 250kBaud Operation for RL = 3k, CL = 1000pF
■ Operates to 120kBaud
■ CMOS Comparable Low Power 30mW
■ Operates from a Single 5V Supply
■ Easy PC Layout—Flowthrough Architecture
■ Rugged Bipolar Design
■ Outputs Assume a High Impedance State When Off or Powered Down
■ Absolutely No Latchup
■ Available in SO and SSOP Packages

APPLICATIONS
■ Notebook Computers
■ Palmtop Computers