SY89544UMG

Signal Switches, Multiplexers, Decoders Overview

The SY89544UMG is a Precision Edge differential 4:1 LVDS multiplexer with internal input termination. It operates on a single 2.5V supply and supports data rates up to 3.2 Gbps. The device features ultra-low jitter, including less than 1 ps RMS random jitter and less than 10 ps peak-to-peak total clock jitter. It accepts AC-coupled or DC-coupled inputs from LVDS, LVPECL, and CML standards via unique VT pins. Propagation delay is guaranteed at less than 510 ps from input to output. It is housed in a 32-lead 5 mm x 5 mm QFN package.

Signal Switches, Multiplexers, Decoders Feature Summary

• Ultra-low jitter design with minimal crosstalk-induced noise
• Internal input termination network accessible via VT pins for flexible interfacing
• Supports AC-coupled and DC-coupled differential inputs across multiple logic standards
• CMOS/TTL-compatible MUX select inputs

Signal Switches, Multiplexers, Decoders Applications

• SONET/SDH channel selection
• Fibre Channel multi-channel selection
• Gigabit Ethernet multi-channel selection

Signal Switches, Multiplexers, Decoders Procurement Notes

Verify the specific ordering suffix matches the required packaging format. The 'MG' suffix indicates a tube package containing 60 units per tube. Confirm that the voltage option 'U' aligns with the 2.5V supply requirement of the target circuit design. Ensure the temperature grade 'G' meets the industrial range specifications necessary for the deployment environment.

Signal Switches, Multiplexers, Decoders Selection Notes

Select this component when a low-jitter 4:1 differential multiplexer is required for high-speed serial links. It is suitable for applications needing interface flexibility between different logic families without external termination components. Consider alternative models if a 3.3V supply voltage is mandatory or if dual differential outputs are needed instead of a single LVDS pair.

Signal Switches, Multiplexers, Decoders Part Context

This part belongs to Microchip's Precision Edge family of high-performance signal switches. It is functionally related to the SY89545L for 3.3V applications and the SY89546U/SY89547L for devices requiring two differential outputs. The SY89544U series provides a stub-free, clean interface solution for demanding telecommunications and networking infrastructure.

Signal Switches, Multiplexers, Decoders Replacement Considerations

SY89544UMG-TR

Signal Switches, Multiplexers, Decoders FAQ

How does the device handle unused differential input pairs?

Unused differential input pairs should be terminated by connecting one input to VCC and the complementary input to GND through a 1 kΩ resistor. In this configuration, the corresponding VT pin must be left open.

What logic standards are supported by the input stage?

The unique input termination and VT pin allow the device to accept DC-coupled and AC-coupled inputs from LVDS, LVPECL, and CML logic standards.