LTC1546IG#PBF

Drivers, Receivers, Transceivers Overview

The LTC1546IG#PBF is a multiprotocol transceiver with integrated cable termination, operating from a single 5V supply. It supports RS232, RS449, EIA530, EIA530-A, V.35, V.36, and X.21 protocols via software-selectable mode pins M0, M1, and M2. The device features three drivers and three receivers, utilizing an internal charge pump to generate required voltage levels. It operates within the industrial temperature range of -40°C to 85°C and is housed in a 28-lead SSOP package.

Drivers, Receivers, Transceivers Feature Summary

• Software-selectable support for multiple serial interface standards including RS232, V.35, and X.21
• Integrated on-chip cable termination eliminates external resistor networks
• Internal charge pump generates necessary supply voltages using minimal external capacitors
• Fail-safe receiver operation ensures defined logic states during floating or shorted input conditions

Drivers, Receivers, Transceivers Applications

• Data networking equipment interfaces
• Channel Service Unit (CSU) and Data Service Unit (DSU) implementations
• Data router serial port configurations

Drivers, Receivers, Transceivers Procurement Notes

Verify the suffix #PBF indicates lead-free compliance and RoHS adherence. Confirm the 'I' designation matches the required -40°C to 85°C industrial temperature range. Ensure the 28-lead SSOP package dimensions align with the target PCB footprint. Cross-reference the datasheet revision date to confirm electrical characteristics remain current.

Drivers, Receivers, Transceivers Selection Notes

Select this component when a single IC must replace discrete transceivers for multiple protocol standards. Verify that the application requires only three differential driver/receiver pairs. Check if the system can accommodate the five external capacitors needed for the charge pump. Consider pairing with the LTC1544 for complete control signal handling in DTE/DCE ports.

Drivers, Receivers, Transceivers Part Context

This part belongs to the Linear Technology multiprotocol transceiver family. It is pin-compatible with the LTC1543 but offers enhanced integration by including on-chip termination. It is typically used alongside the LTC1544 to form a complete serial interface solution. The device simplifies design by removing the need for manual termination switching or complex relay circuits.

Drivers, Receivers, Transceivers Replacement Considerations

The LTC1543 is a pin-compatible predecessor lacking integrated termination. The LTC1546IG is the industrial grade variant; the LTC1546CG covers the commercial range. No direct cross-manufacturer equivalents are officially documented as drop-in replacements.