LTC1344CG#TRPBF

Overview

The LTC1344CG#TRPBF is a software-selectable multiprotocol cable terminator manufactured by Analog Devices Inc. It operates within a supply voltage range of 4.75V to 5.25V and consumes a typical supply current of 200µA. The device provides six configurable termination modes, including RS-232 (V.28), RS-423 (V.10), RS-422 (V.11), V.35, V.36, X.21, EIA-530, and RS-449. It features a data bus latch for sharing select lines across multiple ports and ensures outputs do not load the line when power is off. The component is housed in a 24-lead SSOP package.

Feature Summary

• Software-configurable cable termination supporting multiple serial protocols
• Data bus latch feature enabling shared control lines for multiple interface ports
• High-impedance output state prevents line loading during power-off conditions

Applications

• Data networking equipment requiring protocol flexibility
• Channel Service Unit/Data Service Unit (CSU/DSU) implementations
• Data routers with multiprotocol serial interfaces

Procurement Notes

Verify the specific ordering suffix #TRPBF indicates tape-and-reel packaging rather than tube packaging. Confirm the commercial temperature grade (C) aligns with operational requirements of 0°C to 70°C. Ensure compatibility with the 24-lead SSOP footprint on the target PCB layout.

Selection Notes

Select this component when designing multiprotocol serial interfaces that require dynamic termination switching without hardware changes. It is intended to be paired with transceivers such as the LTC1343 or LTC1543 series to form complete serial port solutions. Verify logic input voltage levels match the system's TTL standards.

Part Context

This part belongs to the LTC1344 family of software-selectable cable terminators. It serves as a complementary component to multiprotocol transceivers, allowing a single hardware design to support various electrical standards like RS-232, RS-422, and V.35 through digital control signals.

Replacement Considerations

The LTC1344A is a pin-compatible alternative within the same family. It offers similar functionality but differs in the mode selection table, specifically providing separate configuration options for RS-449 mode.