LTC1688IS#TRPBF

Drivers, Receivers, Transceivers Overview

The LTC1688IS#TRPBF is a high-speed, quad differential bus driver manufactured by Analog Devices Inc. It supports data rates up to 100Mbps and operates on a single 3V or 5V supply. The device features guaranteed propagation delay of 4ns to 8ns over the full industrial temperature range (-40°C to 85°C) and maintains low channel-to-channel skew of 500ps typical. It provides Hot Swap capability, ensuring backplane data integrity during board insertion and removal. The outputs maintain high impedance in three-state mode or when power is off, covering the RS485 common mode range of -7V to 12V. Supply current is typically 9mA.

Drivers, Receivers, Transceivers Feature Summary

• Hot Swap capable with outputs maintaining high impedance during power-off or three-state conditions
• Short-circuit protection reduces output current to approximately 3mA during faults
• Thermal shutdown circuitry protects against excessive power dissipation
• Pin-compatible with legacy LTC486 and LTC487 devices

Drivers, Receivers, Transceivers Applications

• High-speed RS485 twisted-pair communication links
• High-speed backplane drivers for point-to-point and multipoint configurations
• Complementary clock distribution systems
• STS-1/OC-1 data transmission interfaces
• SCSI driver applications requiring DC-biased termination

Drivers, Receivers, Transceivers Procurement Notes

Verify that the component matches the specific IS suffix for the industrial temperature range (-40°C to 85°C). Confirm the package type is the 16-lead plastic SOIC (S Package). Ensure the datasheet revision aligns with the required specifications for your design. Check for any product change notifications regarding manufacturing updates.

Drivers, Receivers, Transceivers Selection Notes

Select this part for designs requiring 100Mbps operation with tight propagation delay tolerances. The LTC1688 allows all four drivers to be enabled simultaneously, unlike the LTC1689 which limits enablement to two drivers at a time. Consider the 500ps typical skew for critical timing applications. Ensure the PCB layout minimizes parasitic capacitance to maintain signal integrity at maximum data rates.

Drivers, Receivers, Transceivers Part Context

This component belongs to the LTC1688/LTC1689 family of ultrahigh speed differential line drivers. It is designed to replace older generation drivers while offering significantly faster switching speeds and improved thermal management. The series is optimized for robust performance in noisy industrial environments and high-speed digital backplanes.

Drivers, Receivers, Transceivers Replacement Considerations

The LTC1688IS#TRPBF is pin-compatible with the LTC486IS. Designers upgrading from the LTC486 should verify that the increased drive strength and speed do not require adjustments to termination resistors or trace lengths.