LTC1686IS8#TRPBF

Drivers, Receivers, Transceivers Overview

The LTC1686IS8#TRPBF is a high-speed, precision delay, full-duplex RS-485 transceiver manufactured by Analog Devices Inc. It operates from a single 5V supply and supports data rates up to 52Mbps while meeting RS-422 requirements. The device features a unique architecture providing stable propagation delays of typically 18.5ns with low skew over a wide common mode range of –7V to 12V. It includes fail-safe operation guaranteeing a high output when inputs are shorted or floating, along with short-circuit and thermal shutdown protection. The component is housed in an 8-lead plastic SOIC (S8) package.

Drivers, Receivers, Transceivers Feature Summary

• Precision timing architecture ensures tightly controlled propagation delay and minimal skew across temperature variations.
• Fail-safe receiver guarantees a logic high state when differential inputs are shorted or left open within the entire common mode range.
• Integrated short-circuit and thermal shutdown protection prevents latchup damage during fault conditions.

Drivers, Receivers, Transceivers Applications

• High speed RS-485/RS-422 full duplex transceivers
• Level translator circuits
• Backplane transceiver applications
• STS-1/OC-1 data transceivers
• Signal repeaters for extended twisted-pair lines

Drivers, Receivers, Transceivers Procurement Notes

Verify that the ordering suffix #TRPBF corresponds to the tape and reel packaging format rather than tube packaging. Confirm the industrial temperature grade (I suffix) matches system requirements. Ensure the specific datasheet revision aligns with design specifications before finalizing procurement orders.

Drivers, Receivers, Transceivers Selection Notes

Select the LTC1686 variant when driver enable control is required via the DE pin; this part allows three-state outputs. Choose the LTC1687 if a permanently enabled driver is acceptable for simpler interface designs. Both variants share identical electrical characteristics and pinouts, differing only in driver control functionality.

Drivers, Receivers, Transceivers Part Context

This component belongs to the LTC1686/LTC1687 family of high-speed RS-485 transceivers designed for precision timing applications. It serves as a successor to older generations like the LTC490, offering significantly improved propagation delay stability and lower skew suitable for high-frequency data transmission over twisted-pair cables.

Drivers, Receivers, Transceivers Replacement Considerations

Direct pin-compatible substitutes include the LTC490 and LTC491, though these offer different power consumption profiles. Other family members such as the LTC1685 provide similar speed but may lack the specific precision delay characteristics of the LTC1686 series.