LTC1387CSW#TRPBF

Drivers, Receivers, Transceivers Overview

The LTC1387CSW#TRPBF 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. Supply current is typically 7mA, reducing to 5µA in shutdown mode. The component is housed in a 20-lead plastic SO (SW) package and operates within a temperature range of 0°C to 70°C.

Drivers, Receivers, Transceivers Feature Summary

• Configurable interface supporting either one RS485/RS422 differential port or two RS232/EIA562 single-ended ports via logic inputs.
• Integrated charge pump generates required voltage swings for RS232 operation using only a single 5V supply.
• Logic-selectable fast and slow slew rates for the RS485 driver to optimize signal integrity and minimize reflections.
• Includes loopback mode for diagnostic self-testing and separate enable controls for drivers and receivers.

Drivers, Receivers, Transceivers Applications

• Point-of-sale terminals
• Software selectable multiprotocol interface ports
• Low power RS485/RS422/RS232/EIA562 interfaces
• Cable repeaters
• Level translators

Drivers, Receivers, Transceivers Procurement Notes

Verify the specific suffix #TRPBF indicates tape and reel packaging when sourcing components. Confirm the 'C' grade designation matches the required commercial operating temperature range of 0°C to 70°C for your application environment. Ensure compatibility with the 20-lead SW package dimensions during PCB layout.

Drivers, Receivers, Transceivers Selection Notes

Select this component when a single IC must support multiple communication protocols to save board space. Consider the internal charge pump requirements if minimizing external capacitor count is critical. Evaluate the thermal performance given the junction-to-ambient thermal resistance of 75°C/W for the SW package under expected load conditions.

Drivers, Receivers, Transceivers Part Context

This part belongs to the LTC1387 family of multiprotocol transceivers. It shares functional similarities with other single-supply RS232/RS485 devices but distinguishes itself through its specific reconfigurable architecture and integrated charge pump capabilities designed for low-power applications.

Drivers, Receivers, Transceivers Replacement Considerations

Public confirmed substitute part numbers include ISL81387IAZ and ISL81387IAZ-T from Renesas Electronics Corporation. Verify pinout compatibility and electrical specifications before substitution.