LTC1344ACG#PBF

Overview

The LTC1344ACG#PBF is a software-selectable cable terminator manufactured by Analog Devices Inc. It provides six configurable termination networks for multiprotocol serial interfaces, supporting standards including RS232 (V.28), RS423 (V.10), RS422 (V.11), RS485, RS449, EIA530, V.35, and X.21. The device operates on a single positive supply voltage of 4.75V to 5.25V with a typical supply current of 1.0mA. It features a data bus latch function to allow select line sharing across multiple ports. The component is housed in a 24-lead SSOP package and supports an operating temperature range from 0°C to 70°C.

Feature Summary

• Software-configurable termination networks for multiple serial protocols
• Data bus latch feature for shared control lines
• Outputs remain high impedance when power is off

Applications

• DTE or DCE multiprotocol serial interface with DB-25 connector
• Data networking equipment
• Channel Service Unit/Channel Data Service Unit (CSU/DSU)
• Data routers

Procurement Notes

Verify the specific ordering suffix against official documentation to confirm package type and temperature grade. Ensure compatibility with existing PCB footprints for the 24-SSOP configuration. Confirm that the commercial temperature range meets system requirements before finalizing procurement.

Selection Notes

Select this component when designing multiprotocol serial interfaces requiring software-controlled termination switching. Verify that the host controller can provide the necessary TTL-level logic signals for mode selection. Ensure the design accommodates the required supply voltage range and thermal dissipation limits for the SSOP package.

Part Context

This part belongs to the LTC1344 family of cable terminators. It is functionally similar to the LTC1344 but utilizes a different Mode Selection table. It is designed to work in conjunction with transceivers such as the LTC1543 and LTC1544 to form complete software-selectable multiprotocol serial ports.

Replacement Considerations

LTC1344ACG#TRPBF is a direct replacement offering the same functionality in a Tape & Reel packaging format instead of the Tube.