SY55858UHC

Signal Switches, Multiplexers, Decoders Overview

The SY55858UHC is a low-voltage, high-speed dual 2 x 2 crosspoint switch manufactured by Microchip Technology. It features a non-blocking architecture allowing any input to connect to any output. The device supports configurable modes including dual 2:1 mux, dual 1:2 fanout buffer, 1:4 fanout buffer, quad buffer, or dual 2 x 2 switch. It accepts CML or PECL inputs and provides fully differential 50Ω compatible CML outputs. Operating parameters include a maximum frequency of 3.0 GHz (3 Gbps), a supply voltage range of 2.3V to 3.6V, and an operating temperature range of –40°C to +85°C.

Signal Switches, Multiplexers, Decoders Feature Summary

• Non-blocking crosspoint architecture enabling flexible signal routing between inputs and outputs.
• Configurable functionality supporting multiple modes such as dual 2:1 mux, fanout buffers, and quad buffers.
• Unique internal termination design with VT pins for interfacing with DC-coupled or AC-coupled CML and PECL signals.
• TTL/CMOS compatible control logic for straightforward integration.

Signal Switches, Multiplexers, Decoders Applications

• SONET/SDH optical transport systems
• Backplane redundancy configurations
• Add-drop Multiplexers

Signal Switches, Multiplexers, Decoders Procurement Notes

Verify the specific ordering suffix against the manufacturer's official documentation to confirm package type and lead finish. Confirm that the selected variant matches the required industrial temperature range and voltage specifications. Ensure compatibility with existing PCB layouts regarding the 32-pin EPAD-TQFP footprint and thermal requirements.

Signal Switches, Multiplexers, Decoders Selection Notes

Select this component for applications requiring high-speed signal switching with flexible configuration options. Consider the internal termination feature when designing interfaces for mixed logic standards like PECL or LVPECL. Evaluate the power supply requirements within the 2.3V to 3.6V range and ensure adequate bypassing for stable operation at frequencies up to 3.0 GHz.

Signal Switches, Multiplexers, Decoders Part Context

This part belongs to the SuperLite family of high-speed crosspoint switches from Micrel, now part of Microchip Technology. These devices are designed for demanding communication and networking applications where signal integrity and low skew are critical. The family offers various configurations to support different system architectures in optical transport and backplane environments.

Signal Switches, Multiplexers, Decoders Replacement Considerations

For single-channel 2 x 2 crosspoint needs, consider the SY55854. Verify pinout and electrical characteristics against current designs when substituting. Check for updated datasheets if sourcing from Microchip after the acquisition of Micrel.

Signal Switches, Multiplexers, Decoders FAQ

How does the SY55858U handle input termination?

It features unique internal termination accessible through VT pins, allowing easy interface to AC-coupled or DC-coupled PECL/LVPECL signals while leaving VT pins floating for direct CML inputs.

What is the maximum data rate supported?

The device guarantees AC parameters for a maximum frequency greater than 3.0 GHz, supporting data rates up to 3 Gbps.