SY55856UHI

Overview

The SY55856UHI is a SuperLite differential two-channel precision CML delay line manufactured by Micrel, Inc. It operates within an industrial temperature range of -40°C to +85°C and accepts a supply voltage between 2.3V and 3.6V. The device supports maximum frequencies exceeding 2.5GHz with propagation delays under 384ps. It provides a total adjustable delay range of ±350ps in 50ps increments via three digital control bits. The component utilizes a 32-pin EPAD-TQFP package (H32-1) and features source-terminated CML outputs optimized for 50Ω loads.

Feature Summary

• Provides fully differential CML inputs and outputs designed for high-speed signal integrity
• Enables precise relative delay adjustment between clock and data channels in 50ps increments
• Includes a dedicated control pin for optional inversion of the clock input signal
• Features variable threshold logic inputs compatible with various single-ended control interfaces

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 that the specific ordering suffix matches the required lead finish and packaging format. The H32-1 package variant is available with Sn-Pb or NiPdAu finishes. Confirm whether tape and reel quantities are necessary for the production run. Ensure the selected part number aligns with the intended operating temperature range and power supply specifications.

Selection Notes

Select this component when precise relative timing adjustments between differential signals are required. The device accommodates both single-ended and differential CML inputs. Designers must account for the variable threshold logic inputs and provide appropriate termination resistors for the source-terminated CML outputs to ensure optimal signal performance.

Part Context

This component belongs to the SuperLite family of high-speed analog and digital crosspoint ICs. Originally developed by Micrel, Inc., the product line focuses on precision timing and signal routing solutions. Microchip Technology acquired Micrel, integrating these specialized interface components into their broader portfolio of communication and networking integrated circuits.

Replacement Considerations

The datasheet lists the SY55856UHG as a Pb-Free alternative within the same package type. Verify compatibility regarding the lead finish and environmental compliance requirements before substituting parts. No other direct functional equivalents are documented in the provided reference material.