SY55856UHG-TR

Overview

The SY55856UHG-TR is a SuperLite differential two-channel precision CML delay line manufactured by Microchip Technology. It operates within a supply voltage range of 2.3V to 3.6V and supports maximum frequencies exceeding 2.5GHz with a throughput up to 5Gbps. The device provides programmable relative delay adjustments in 50ps increments, offering a total adjustment range of ±350ps across seven steps. Key electrical parameters include a propagation delay of less than 384ps, output rise/fall times under 120ps, and an output jitter below 1ps RMS. It utilizes source-terminated CML outputs optimized for 50Ω loads and is housed in a 32-pin EPAD-TQFP package.

Feature Summary

• Provides digitally controlled relative delay adjustment between clock and data signals in precise 50ps increments
• Features full differential CML I/O architecture with source-terminated outputs optimized for 50Ω loads
• Includes variable threshold inputs allowing flexible logic level interfacing via the LVL control pin
• Supports optional clock signal inversion through the dedicated CINV control input

Applications

• Data communications systems requiring signal alignment
• Telecom systems utilizing high-speed backplanes
• Signal de-skewing applications
• Pulse alignment circuits
• Digitally controlled delay lines

Procurement Notes

Verify component authenticity by checking for the Pb-Free bar line indicator on the package marking, which distinguishes the HG suffix variant from standard Sn-Pb versions. Confirm that the ordering suffix TR corresponds to the tape and reel packaging format required for automated assembly processes. Ensure compatibility with industrial temperature ranges specified in the datasheet.

Selection Notes

Select this component when precise relative timing adjustments between differential clock and data paths are required. The device is suitable for designs needing adjustable delays up to ±350ps with 50ps resolution. Consider the variable threshold inputs if interfacing with different logic families or voltage levels using the LVL pin. Ensure the design accommodates the 32-pin TQFP footprint and exposed pad thermal requirements.

Part Context

This part belongs to the SuperLite family of high-speed differential logic devices originally developed by Micrel, Inc., now produced by Microchip Technology. The SY55856U specifically addresses the need for programmable delay in high-frequency CML applications. The HG suffix indicates a lead-free (NiPdAu) finish, while the TR suffix denotes tape and reel packaging for surface mount technology.

Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation.