SY58040UMY

Signal Switches, Multiplexers, Decoders Overview

The SY58040UMY is a low jitter, low skew, high-speed 4×4 crosspoint switch optimized for precision telecom and enterprise server/storage distribution applications. It distributes clock frequencies from DC to 4GHz and data rates to 5Gbps guaranteed over temperature and voltage. The device features ultra-low jitter with 67fs RMS phase jitter (typ) at 622MHz. AC performance includes <350ps propagation delay, <60ps rise/fall times, and <25ps output-to-output skew. It operates on a 2.5V ±5% or 3.3V ±10% power supply within the –40°C to +85°C industrial temperature range.

Signal Switches, Multiplexers, Decoders Feature Summary

• Provides crosspoint switching between any input pair to any output pair with unique patent-pending channel-to-channel isolation design for superior crosstalk performance.
• Features a unique 3-pin input termination architecture that directly interfaces to any differential signal (AC- or DC-coupled) as small as 100mV without level shifting or external termination resistor networks.
• Outputs are 50Ω source terminated CML with extremely fast rise/fall times guaranteed to be less than 60ps, minimizing round-trip reflections.

Signal Switches, Multiplexers, Decoders Applications

• Data communication systems
• All SONET/SDH data/clock applications
• All Fibre Channel applications
• All Gigabit Ethernet applications

Signal Switches, Multiplexers, Decoders Procurement Notes

Verify the specific ordering suffix 'MY' corresponds to the QFN-44 package type and industrial temperature range (-40°C to +85°C). Confirm Pb-Free green package status if required for environmental compliance. Ensure the supplier provides documentation confirming the part is sourced from Micrel, Inc., now Microchip Technology, to guarantee authenticity and traceability of the component revision.

Signal Switches, Multiplexers, Decoders Selection Notes

Select this component when a 4x4 CML crosspoint switch with internal I/O termination is required. It is suitable for applications needing DC to 5Gbps throughput with guaranteed AC performance across temperature and voltage variations. The internal 50Ω input termination simplifies interface design for LVDS, LVPECL, and CML signals. Ensure the system supports 2.5V or 3.3V supplies and requires low skew and jitter characteristics for precision timing distribution.

Signal Switches, Multiplexers, Decoders Part Context

The SY58040U is part of Micrel’s Precision Edge product line, designed for high-speed, low-jitter applications. It serves as a core switching element in telecom and storage networks. The device integrates complex routing logic into a compact 44-pin QFN package, reducing board space compared to discrete solutions. Its design focuses on maintaining signal integrity in high-density environments through advanced isolation techniques.

Signal Switches, Multiplexers, Decoders Replacement Considerations

Public confirmed substitute part numbers are not available in the provided datasheet. Verify compatibility with existing control logic levels (TTL/CMOS compatible SIN/SOUT inputs) before considering alternative components from other manufacturers.

Signal Switches, Multiplexers, Decoders FAQ

How does the SY58040UMY handle input termination?

The device features a unique 3-pin input termination architecture where each side of the differential input pair internally terminates to a VT pin through 50Ω, eliminating the need for external termination resistors.

What is the maximum data rate supported by the SY58040UMY?

The SY58040UMY guarantees AC performance up to 5Gbps throughput over the full operating temperature and voltage range.