LTC1385IG#TRPBF

Drivers, Receivers, Transceivers Overview

The LTC1385IG#TRPBF is a low-power, dual-driver/dual-receiver EIA/TIA-562 transceiver operating from a single 3.3V supply. It features three modes: Normal (200mA), Driver Disable (35mA), and Shutdown (0.2mA). The charge pump requires four 0.1µF capacitors. It supports data rates up to 120kBaud with a 1000pF, 3kΩ load. Inputs tolerate –25V without damage, and outputs withstand –10kV ESD. Operating temperature range is –40°C to 85°C. Package is 20-lead SSOP.

Drivers, Receivers, Transceivers Feature Summary

• Ultra-low power consumption with dedicated shutdown and driver disable modes for extended battery life in portable devices.
• Robust input protection allowing receiver inputs to be forced to –25V without damage and drivers to survive –10kV ESD strikes.
• Minimal external component count requiring only four space-saving 0.1µF capacitors for the internal charge pump operation.

Drivers, Receivers, Transceivers Applications

• Notebook computers
• Palmtop computers

Drivers, Receivers, Transceivers Procurement Notes

Verify the specific suffix #TRPBF indicates tape and reel packaging when sourcing. Confirm the IG suffix corresponds to the industrial temperature range of –40°C to 85°C. Ensure the order matches the 20-lead SSOP package format required by your PCB layout. Cross-reference the manufacturer's latest documentation for any pinout or electrical specification updates.

Drivers, Receivers, Transceivers Selection Notes

Select this component for applications requiring RS-232 communication powered exclusively by a 3.3V rail. It is suitable where minimizing standby current is critical, offering a 0.2mA shutdown state. Consider the 20-lead SSOP footprint during schematic capture. Verify that the 120kBaud maximum data rate meets the system's serial communication requirements.

Drivers, Receivers, Transceivers Part Context

This device belongs to the LTC1385 family of ultra-low power RS-232 transceivers. It serves as a direct replacement for the LT1180A in many designs while offering improved power efficiency at 3.3V. The series includes variants like the LTC1386 for narrow SO packages and the LTC1387 for multi-protocol support.

Drivers, Receivers, Transceivers Replacement Considerations

The datasheet lists the LT1180A as pin-compatible. Other related parts include the LTC1386 (narrow 16-pin SO) and LTC1387 (multi-protocol). Verify package dimensions and voltage levels before substitution.

Drivers, Receivers, Transceivers FAQ

What is the maximum data rate supported by the LTC1385?

The transceiver can operate up to 120kBaud with a 1000pF, 3kΩ load.

How does the Driver Disable mode affect power consumption?

In Driver Disable mode, the charge pump is turned off and driver outputs are three-stated, reducing supply current to 35mA while keeping receivers active.

Can the receiver inputs handle voltages outside the supply range?

Yes, receiver inputs can be forced to –25V without damage, providing robust protection against line faults.