LTC2870IFE#PBF

Drivers, Receivers, Transceivers Overview

The LTC2870IFE#PBF is a robust pin-configurable multiprotocol transceiver supporting RS232, RS485, and RS422 protocols. It operates on a single 3V to 5.5V supply with a 1.7V to 5.5V logic interface. The device integrates an RS485 driver/receiver capable of 20Mbps data rates and up to 256 nodes, alongside two RS232 transceivers operating at 500kbps. Pin-controlled integrated termination resistors (120Ω for RS485, 5kΩ for RS232) eliminate external components. An internal DC/DC boost converter generates the required ±7V and -6.3V supplies using a single 10µH inductor and capacitors.

Drivers, Receivers, Transceivers Feature Summary

• Pin-configurable architecture allows flexible configuration as one RS485 differential transceiver or two RS232 single-ended transceivers on shared I/O lines.
• Integrated half-duplex switching enables seamless transition between four-wire and two-wire RS485 configurations without external relays.
• Built-in failsafe receiver operation ensures UART lockup prevention during floating, shorted, or terminated input conditions.
• Logic loopback mode internally routes driver inputs to receiver outputs for diagnostic self-testing.

Drivers, Receivers, Transceivers Applications

• Point-of-sale terminals
• Cable repeaters
• Protocol translators

Drivers, Receivers, Transceivers Procurement Notes

Verify the specific suffix 'IFE' corresponds to the 28-lead plastic TSSOP package and the industrial temperature range (-40°C to 85°C). Confirm that the '#PBF' designation indicates lead-free finish and RoHS compliance. Ensure the ordering quantity matches the manufacturer's standard tube packaging specifications for this specific package type.

Drivers, Receivers, Transceivers Selection Notes

Select the LTC2870IFE#PBF when a single-chip solution is required to support both RS485 and RS232 interfaces on shared pins. This part is suitable for designs needing automatic termination selection and high ESD protection (±26kV HBM). Consider the LTC2871 if independent control of dedicated RS232 and RS485 lines is necessary instead of shared I/O configuration.

Drivers, Receivers, Transceivers Part Context

The LTC2870 belongs to a family of multiprotocol transceivers that integrate power generation and termination. It simplifies board design by replacing discrete boost converters and termination networks. The device is manufactured by Analog Devices Inc. and is available in various temperature grades and packages, including QFN and TSSOP options.

Drivers, Receivers, Transceivers Replacement Considerations

Public confirmed substitute part numbers are not provided in the verified source material.