LTC1689IS#PBF

Drivers, Receivers, Transceivers Overview

The LTC1689IS#PBF is a high-speed RS485 quad differential line driver manufactured by Analog Devices Inc. It operates at data rates up to 100Mbps with a guaranteed propagation delay of 8ns ±4ns over the full operating temperature range. The device supports single 3V or 5V supplies, drawing only 9mA of supply current. It features Hot Swap capability, maintaining high impedance outputs during power-off or three-state conditions. The IS suffix indicates an industrial temperature range of -40°C to +85°C. Packaged in a 16-lead SOIC, it allows two drivers to be enabled simultaneously.

Drivers, Receivers, Transceivers Feature Summary

• Hot Swap capable outputs maintain high impedance during board insertion and removal
• Guaranteed narrow propagation delay window of 8ns ±4ns across temperature
• Low channel-to-channel skew of 500ps typical for precise timing
• Short-circuit protection reduces output current to 3mA typical during faults

Drivers, Receivers, Transceivers Applications

• High speed RS485 twisted-pair communication links
• High speed backplane point-to-point and multipoint drivers
• STS-1/OC-1 data transmission interfaces
• SCSI bus drivers requiring hot swap support

Drivers, Receivers, Transceivers Procurement Notes

Verify the component matches the specific datasheet revision 16889fa. Confirm the package type is the 16-lead plastic SOIC (S Package). Ensure the suffix IS corresponds to the required industrial temperature range of -40°C to +85°C. Check RoHS compliance status as indicated in the ordering information section of the official documentation.

Drivers, Receivers, Transceivers Selection Notes

Select this part when simultaneous enablement of only two drivers is required, distinguishing it from the LTC1688 which enables all four. Verify that the application requires 100Mbps operation with tight skew constraints. Ensure the system design accommodates the 3V to 5.25V supply voltage range and utilizes appropriate termination resistors for the transmission line impedance.

Drivers, Receivers, Transceivers Part Context

This component belongs to the LTC1688/LTC1689 family of ultrahigh speed differential bus drivers. It is pin-compatible with older generations like the LTC486 and LTC487 but offers significantly higher speeds. The primary distinction within the family is the enable logic configuration between the dual-driver LTC1689 and the quad-driver LTC1688.

Drivers, Receivers, Transceivers Replacement Considerations

LTC1688IS#PBF serves as a functional substitute if enabling all four drivers simultaneously is acceptable. For lower speed requirements, the LTC486 or LTC487 families provide pin-compatible alternatives with slower performance characteristics.