LTC1689CS#PBF

Drivers, Receivers, Transceivers Overview

The LTC1689CS#PBF is a high-speed RS485 quad differential line driver manufactured by Analog Devices Inc. It operates from a single 3V or 5V supply and supports data rates up to 100Mbps, with guaranteed propagation delay of 8ns ±4ns over the full operating temperature range. The device features Hot Swap capability, maintaining high impedance outputs during power-off or three-state conditions across the common mode range of –7V to 12V. It includes short-circuit protection limiting output current to approximately 3mA and thermal shutdown. The component is housed in a 16-lead plastic SOIC package.

Drivers, Receivers, Transceivers Feature Summary

• Hot Swap capable outputs maintain high impedance during board insertion/removal and power cycles
• Guaranteed narrow propagation delay window of 8ns ±4ns ensures signal integrity at high speeds
• Integrated short-circuit protection reduces fault current to typical 3mA levels
• Supports operation with single 3V or 5V power supplies

Drivers, Receivers, Transceivers Applications

• High-speed RS485 twisted-pair communication networks
• Backplane data transmission systems
• STS-1/OC-1 data drivers
• SCSI interface drivers

Drivers, Receivers, Transceivers Procurement Notes

Verify the specific suffix #PBF indicates lead-free and RoHS compliance status as per manufacturer documentation. Confirm the CS variant meets the required commercial operating temperature range of 0°C to 70°C for your application environment. Ensure ordering quantities match the standard tube packaging configuration provided by distributors.

Drivers, Receivers, Transceivers Selection Notes

Select the LTC1689CS#PBF when independent control of driver pairs is required, as it enables two drivers simultaneously via EN12 and EN34 pins. Choose this model over the LTC1688 if asymmetric bus configurations are necessary. Ensure the system design accommodates the 16-lead SOIC footprint and provides adequate thermal dissipation for the specified junction temperature limits.

Drivers, Receivers, Transceivers Part Context

This component belongs to the LTC1688/LTC1689 family of ultrahigh speed differential bus drivers. It shares pin compatibility with legacy parts like the LTC486 and LTC487 but offers significantly higher data rate capabilities. The family is designed for applications requiring robust RS485 performance with added hot swap functionality.

Drivers, Receivers, Transceivers Replacement Considerations

Public confirmed substitute part numbers include the LTC1688CS#PBF, which allows all four drivers to be enabled together. Other pin-compatible options within the Analog Devices portfolio include the LTC486 and LTC487 series, though these operate at lower maximum data rates.