LTC1387IG#PBF

Drivers, Receivers, Transceivers Overview

The LTC1387IG#PBF is a low-power reconfigurable CMOS bidirectional transceiver manufactured by Analog Devices Inc. It operates from a single 5V supply and can be configured as one RS485 differential port or two RS232 single-ended ports. The device features an onboard charge pump using four 0.1µF capacitors to generate boosted positive and negative supplies for RS232 drivers. It supports data rates up to 5MBd in fast slew mode and 150kBd in slow slew mode. The IC includes separate driver and receiver enable controls, loopback mode for self-testing, and thermal shutdown protection. It is housed in a 20-lead plastic SSOP package and operates within a temperature range of -40°C to +85°C.

Drivers, Receivers, Transceivers Feature Summary

• Configurable interface supporting either one RS485/RS422 differential port or two RS232/EIA562 single-ended ports via logic input.
• Integrated charge pump generates internal boosted voltage rails from a single 5V supply, eliminating the need for external dual-voltage sources.
• Logic-selectable fast or slow slew rate control for the RS485 driver to manage signal reflections and electromagnetic interference.
• Built-in diagnostic loopback mode allows driver outputs to connect internally to receiver inputs for system verification.

Drivers, Receivers, Transceivers Applications

• Point-of-sale terminals
• Software selectable multiprotocol interface ports
• Cable repeaters

Drivers, Receivers, Transceivers Procurement Notes

Verify the specific suffix #PBF indicates lead-free compliance when sourcing. Confirm the 'I' grade designation matches the required industrial temperature range of -40°C to +85°C for your application environment. Ensure the 20-SSOP package dimensions align with your PCB footprint requirements before finalizing procurement.

Drivers, Receivers, Transceivers Selection Notes

Select this component when a single interface port requires flexible protocol switching between RS485 and RS232 without additional hardware complexity. It is suitable for designs constrained by a single 5V power rail. Consider the slow slew rate option if cable termination is uncertain or if EMI reduction is critical for the specific communication link.

Drivers, Receivers, Transceivers Part Context

The LTC1387 belongs to the Analog Devices LTC1387 series of multiprotocol transceivers. This family focuses on providing software-reconfigurable communication interfaces in a compact form factor. The IG#PBF variant specifically denotes the industrial temperature grade version packaged in a 20-lead SSOP housing, distinguishing it from commercial grades or alternative package styles like SW.

Drivers, Receivers, Transceivers Replacement Considerations

ISL81387IAZ