SY89473UMG

Signal Switches, Multiplexers, Decoders Overview

The SY89473UMG is a Precision LVPECL 2:1 multiplexer with 1:2 fanout and internal termination. It processes clocks up to 2.5GHz and data up to 2.5Gbps. The device operates from a 2.5V ±5% or 3.3V ±10% supply, drawing 45mA to 65mA. It features less than 500ps propagation delay, less than 190ps rise/fall times, and less than 20ps output-to-output skew. Jitter performance includes less than 1ps RMS random jitter and less than 10ps peak-to-peak total jitter. The component is housed in a 24-pin QFN package and functions within an industrial temperature range of –40°C to +85°C.

Signal Switches, Multiplexers, Decoders Feature Summary

• Selects between two differential input channels and provides two copies of the selected signal via unique patented input isolation design.
• Features ultra-low jitter architecture with guaranteed AC performance over temperature and supply voltage variations.
• Accepts DC- and AC-coupled inputs including CML, PECL, and LVDS through patent-pending input termination and VT pin interface.
• Generates 800mV (100K) LVPECL output swing with fast rise and fall times.

Signal Switches, Multiplexers, Decoders Applications

• Clock switchover
• Data distribution

Signal Switches, Multiplexers, Decoders Procurement Notes

Verify current availability status as this component originates from Micrel, Inc., which was acquired by Microchip Technology. Confirm that the ordering suffix MG corresponds to the 24-pin QFN package with NiPdAu lead finish. Ensure compatibility with the specified 2.5V or 3.3V power supply requirements during procurement validation.

Signal Switches, Multiplexers, Decoders Selection Notes

Choose this component for high-speed differential clock routing requiring low jitter and flexible input interfacing. It supports both AC and DC coupling for various logic families without external level shifting. The internal termination simplifies PCB layout. Verify that the 2.5Gbps data rate and 2.5GHz clock frequency meet system bandwidth requirements before selection.

Signal Switches, Multiplexers, Decoders Part Context

This part belongs to the Precision Edge product line originally developed by Micrel, Inc. It serves as a high-speed multiplexer designed for demanding networking and server applications. The device integrates multiplexing and fanout capabilities into a single compact package, reducing component count in complex clock distribution networks.

Signal Switches, Multiplexers, Decoders Replacement Considerations

SY89474U

Signal Switches, Multiplexers, Decoders FAQ

What types of input signals does the SY89473UMG accept?

The device accepts AC- or DC-coupled differential signals such as CML, PECL, and LVDS, handling swings as small as 100mV (200mVpp).

How is the SEL input configured?

The SEL input is TTL/CMOS-compatible and internally connected to a 25kΩ pull-up resistor, defaulting to a logic HIGH state if left open.