LTC2870CUFD#PBF

Drivers, Receivers, Transceivers Overview

The LTC2870CUFD#PBF is a multiprotocol transceiver supporting RS232, RS485, and RS422 protocols. It operates on a single 3V to 5.5V supply with a logic interface range of 1.7V to 5.5V. The device integrates two RS232 transceivers or one RS485 transceiver on shared I/O lines. Key electrical parameters include a maximum data rate of 20Mbps for RS485 and 500kbps for RS232. It features an integrated DC/DC boost converter generating VDD (+7V) and VEE (-6.3V). ESD protection ratings are ±26kV (HBM) for the LTC2870 interface pins. The component is housed in a 28-lead 4mm × 5mm QFN package.

Drivers, Receivers, Transceivers Feature Summary

• Pin-configurable multiprotocol support for RS232, RS485, and RS422 interfaces
• Integrated termination resistors with automatic selection for RS485 (120Ω) and RS232 (5kΩ)
• Built-in DC/DC boost converter eliminates external supplies for RS232 levels
• High ESD protection on interface pins and full failsafe operation for RS485 receivers

Drivers, Receivers, Transceivers Applications

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

Drivers, Receivers, Transceivers Procurement Notes

Verify the specific ordering suffix against the manufacturer's official documentation to confirm the package type and temperature grade. Ensure the part number matches the required pin configuration and lead finish specifications before procurement.

Drivers, Receivers, Transceivers Selection Notes

Select this component when system design requires flexible switching between RS232 and RS485 protocols using shared I/O lines. It is suitable for applications needing high ESD immunity and simplified board layout due to integrated termination and power generation capabilities.

Drivers, Receivers, Transceivers Part Context

This part belongs to the LTC2870/LTC2871 family of robust multiprotocol transceivers. The 'CUFD' designation indicates the commercial temperature range (0°C to 70°C) and the 28-lead QFN package format. The '#PBF' suffix denotes a lead-free finish compliant with RoHS standards.

Drivers, Receivers, Transceivers Replacement Considerations

Public confirmed substitute part numbers: None identified.