DESCRIPTION
The LT®1330 is a three driver, five receiver RS232 transceiver with low supply current. Designed to interface with new 3V logic, the LT1330 operates with both a 5V power supply and a 3V logic power supply. The chip may be shutdown to micropower operation with one receiver remaining active to monitor RS232 inputs such as ring detect from a modem.
The LT1330 is fully compliant with all EIA RS232 specifications. Additionally, the RS232 line input and output pins are resilient to multiple ±10kV ESD strikes. This eliminates the need for costly TransZorbs® on line pins for the RS232 part.
The LT1330 operates to 120kbaud even driving high capacitive loads. During shutdown, driver and receiver outputs are at a high impedance state allowing devices to be paralleled.

FEATURES
■ 3V Logic Interface
■ ESD Protection over ±10kV
■ Uses Small Capacitors: 0.1µF, 0.2µF, 1.0µF
■ One Low Power Receiver Remains Active While in Shutdown
■ Pin Compatible with LT1137A and LT1237
■ 120kBaud Operation for RL = 3k, CL = 2500pF
■ 250kBaud Operation for RL = 3k, CL = 1000pF
■ CMOS Comparable Low Power: 30mW
■ Easy PC Layout—Flowthrough Architecture
■ Rugged Bipolar Design
■ Outputs Assume a High Impedance State When Off or Powered Down
■ Absolutely No Latchup
■ 60µA Supply Current in Shutdown
■ Available in SO and SSOP Packages

APPLICATIONS
■ Notebook Computers
■ Palmtop Computers