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 R_L = 3k, C_L = 2500pF
• 250kBaud Operation for R_L = 3k, C_L = 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

Typical Application

Description

The LT1330 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 shut down 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.