SY89543LMG

Signal Switches, Multiplexers, Decoders Overview

The SY89543LMG is a dual 2:1 differential LVDS multiplexer from the Precision Edge family, designed for high-speed signal routing. It supports data rates up to 3.2 Gbps with guaranteed AC performance across temperature and voltage ranges. The device features ultra-low jitter characteristics, including less than 1 ps RMS random jitter and less than 10 ps peak-to-peak deterministic jitter. It operates on a single 3.3V supply within a –40°C to +85°C industrial temperature range. The MLF-32 package integrates internal input termination accessible via VT pins, facilitating flexible interface configurations.

Signal Switches, Multiplexers, Decoders Feature Summary

• Dual independent 2:1 multiplexers with integrated internal input termination networks
• Ultra-low jitter design optimized for high-speed clock and data applications
• Flexible input interface supporting AC-coupled and DC-coupled LVDS, LVPECL, and CML standards
• CMOS/TTL compatible select inputs for straightforward control logic integration

Signal Switches, Multiplexers, Decoders Applications

• Redundant clock and data switchover systems
• SONET/SDH multi-channel selection architectures
• Fiber Channel interconnects
• Gigabit Ethernet (GigE) implementations

Signal Switches, Multiplexers, Decoders Procurement Notes

Verify that the specific ordering suffix matches the required packaging format, as tape-and-reel variants exist alongside tube packaging. Confirm RoHS compliance status and lead finish specifications corresponding to the exact part number variant. Ensure the procurement documentation references the correct Micrel/Microchip datasheet revision to validate electrical parameters against current manufacturing standards.

Signal Switches, Multiplexers, Decoders Selection Notes

Select this component when dual independent differential signal paths are required within a single package footprint. Consider the SY89542U if a 2.5V supply rail is mandatory instead of the standard 3.3V operation. Evaluate the SY89545L or SY89547L if four-input multiplexing or additional fanout capabilities are necessary for the system architecture.

Signal Switches, Multiplexers, Decoders Part Context

The SY89543LMG belongs to the Precision Edge product family, which focuses on low-jitter timing and signal routing solutions. Originally developed by Micrel, Inc., the portfolio was integrated into Microchip Technology following acquisition. This series targets high-performance networking and storage infrastructure requiring precise signal integrity and minimal propagation delay.

Signal Switches, Multiplexers, Decoders Replacement Considerations

SY89542U serves as a direct functional substitute operating at 2.5V.

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 1kΩ resistor, while leaving the associated VT pin open.

What is the function of the VT pins on the device?

The VT pins provide a center-tap access point to the internal 50Ω termination network, allowing users to configure the input stage for various logic standards without external resistors.

Can the SY89543LMG interface directly with CML signals?

Yes, the unique input termination design allows the device to accept both AC-coupled and DC-coupled CML inputs in addition to LVDS and LVPECL standards.