SY56034ARMG

Analog Switches - Special Purpose Overview

The SY56034ARMG is a fully differential, low voltage CML 2:6 (2+4) multiplexer with crosspoint capability. 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 or termination resistors. Outputs are 400mV CML with rise/fall times less than 80ps. It is available in a 32-pin QFN package and operates over the industrial temperature range of –40°C to +85°C.

Analog Switches - Special Purpose Feature Summary

• Supports high-speed signal processing for clocks up to 5GHz and data rates 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 interface compatibility.
• Provides configurable output supplies at 1.2V, 1.8V, or 2.5V.

Analog Switches - Special Purpose 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

Analog Switches - Special Purpose Procurement Notes

Verify the component origin, as the datasheet identifies Micrel, Inc. as the manufacturer while the model number prefix suggests Microchip Technology. Confirm the specific ordering suffix 'MG' corresponds to the QFN-32 package with NiPdAu lead finish and Pb-Free status. Ensure the industrial temperature range (-40°C to +85°C) matches the application requirements before procurement.

Analog Switches - Special Purpose Selection Notes

Select this component for applications requiring high-speed CML signal routing with minimal jitter. Ensure the system supports the required dual-supply configuration (2.5V core and 1.2V/1.8V/2.5V output). Verify that the PCB layout accommodates the 32-pin QFN package and provides adequate thermal dissipation for the exposed pad ground connection.

Analog Switches - Special Purpose Part Context

The SY56034AR belongs to Micrel’s Precision Edge product line, designed for high-speed communication systems. This series focuses on low voltage operation and precise timing characteristics. The device integrates multiplexing and crosspoint switching functions into a single compact package, reducing board space compared to discrete solutions.

Analog Switches - Special Purpose Replacement Considerations

Check for direct replacements within the same family, such as the SY56034ARMGTR, which offers the same functionality but in tape and reel packaging instead of trays.

Analog Switches - Special Purpose FAQ

How does the device 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 propagation delay?

The maximum propagation delay from input to output (IN-to-Q) is 300ps, and from select pins to output (SEL-to-Q) is also 300ps.

Can unused outputs be left floating?

No, any unused output pair must be terminated when VCCO is 1.2V. Leaving them floating can affect proper driver operation.