LTC1687IS#PBF

Drivers, Receivers, Transceivers Overview

The LTC1687IS#PBF is a high-speed, precision delay, full-duplex RS485 transceiver manufactured by Analog Devices Inc. It operates from a single 5V supply and supports data rates up to 52Mbps while meeting RS422 requirements. The device features a unique architecture providing stable propagation delays of typically 18.5ns with low skew of 500ps over the industrial temperature range (-40°C to 85°C). It includes fail-safe operation guaranteeing a high output when inputs are shorted or floating across the entire common mode range of -7V to 12V. Additional protections include thermal shutdown and short-circuit protection for both driver and receiver outputs.

Drivers, Receivers, Transceivers Feature Summary

• Precision timing architecture ensures tightly controlled propagation delay and minimal skew over wide temperature and common mode ranges.
• Integrated fail-safe mechanism guarantees a logic high receiver output during input faults or open circuits within the specified common mode voltage limits.
• Robust fault protection includes thermal shutdown and current-limiting short-circuit detection for both driver and receiver stages.

Drivers, Receivers, Transceivers Applications

• High speed RS485/RS422 full duplex transceivers
• Level translator applications
• Backplane transceiver systems
• STS-1/OC-1 data transceivers
• Signal repeaters

Drivers, Receivers, Transceivers Procurement Notes

Verify the specific suffix IS#PBF against official Analog Devices documentation to confirm the industrial temperature grade and lead-free packaging status. Ensure compatibility with the 14-lead SO package footprint during procurement planning. Cross-reference the manufacturer part number directly with authorized distributors to validate authenticity and traceability.

Drivers, Receivers, Transceivers Selection Notes

Select this component when precise timing synchronization between driver and receiver is critical for high-speed data integrity. The industrial temperature rating makes it suitable for environments exceeding standard commercial limits. Consider the 14-lead SO package constraints regarding PCB space and thermal dissipation requirements compared to alternative packages in the family.

Drivers, Receivers, Transceivers Part Context

This device belongs to the LTC1686/LTC1687 family of precision delay RS485 transceivers. It shares architectural similarities with the LTC1686 but adds independent driver and receiver enable controls via DE and RE pins. The series is designed to replace older generations like the LTC490/LTC491 while offering superior timing performance and robust fault protection characteristics.

Drivers, Receivers, Transceivers Replacement Considerations

The LTC1686CS#PBF and LTC1686IS#PBF are pin-compatible alternatives within the same datasheet family. Verify functional differences regarding enable pin configurations before substitution.