SY56040ARMY

Signal Switches, Multiplexers, Decoders Overview

The SY56040ARMY is a fully differential, low voltage 1.2V/1.8V/2.5V CML 4x4 crosspoint switch manufactured by Microchip Technology (originally Micrel). It processes clock signals up to 5GHz or data patterns up to 6.4Gbps. The device operates from a 2.5V ±5% core supply and a 1.2V/1.8V/2.5V ±5% output supply. It features an internal 3-pin input termination architecture that interfaces to LVPECL, LVDS, or CML signals as small as 100mV without external level-shifting. Outputs are 400mV CML with rise/fall times less than 80ps. It is available in a 44-pin MLF package and operates over the industrial temperature range of –40°C to +85°C.

Signal Switches, Multiplexers, Decoders Feature Summary

• Supports high-speed signal routing for clock and data patterns up to 6.4Gbps
• Features ultra-low jitter design with cycle-to-cycle jitter under 1ps RMS
• Includes unique 3-pin input termination architecture for flexible interfacing
• Operates with dual power supplies for core and output buffers

Signal Switches, Multiplexers, Decoders Applications

• Data Distribution: OC-48, OC-48+FEC
• SONET clock and data distribution
• Fibre Channel clock and data distribution
• Gigabit Ethernet clock and data distribution

Signal Switches, Multiplexers, Decoders Procurement Notes

Verify the manufacturer origin, as the component was originally produced by Micrel before acquisition by Microchip Technology. Confirm the specific ordering suffix 'ARMY' corresponds to the MLF-44 package with matte tin lead finish and industrial temperature rating. Ensure compatibility with the required 2.5V core and selectable 1.2V/1.8V/2.5V output supply voltages for your system design.

Signal Switches, Multiplexers, Decoders Selection Notes

Select this component when a fully differential 4x4 crosspoint switch is required for high-speed CML applications. It is suitable for designs needing precise signal routing with minimal jitter and flexible input termination for LVDS, LVPECL, or CML sources. Consider the 44-pin MLF package constraints and thermal requirements for your PCB layout.

Signal Switches, Multiplexers, Decoders Part Context

The SY56040AR belongs to Micrel’s Precision Edge product line, designed for high-speed communication and networking applications. It serves as a key component in systems requiring reliable clock and data distribution across multiple channels with low skew and jitter performance.

Signal Switches, Multiplexers, Decoders Replacement Considerations

SY58040U: 4x4 CML switch with internal I/O termination. SY89540U: 4x4 LVDS switch with internal I/O termination.

Signal Switches, Multiplexers, Decoders FAQ

How does the SY56040ARMY handle AC-coupled inputs?

For AC-coupled inputs, an internal high impedance resistor divider biases the VT pin. A 0.1µF low ESR capacitor should be used to bypass the VT pin to VCC.

What is the maximum data rate supported by the SY56040ARMY?

The device supports data patterns up to 6.4Gbps and clock signals up to 5GHz.