SY89542UMI

Signal Switches, Multiplexers, Decoders Overview

The SY89542UMI is a dual differential 2:1 LVDS multiplexer operating from a single 2.5V supply with guaranteed AC performance over temperature and voltage. It supports data rate throughput up to 3.2Gbps, featuring an internal input termination network accessible via VT pins for flexible interface configurations. The device provides ultra-low jitter characteristics, including less than 1ps RMS random jitter and less than 10ps peak-to-peak deterministic jitter. It operates within an industrial temperature range of –40°C to +85°C and is housed in a 32-pin MLF package.

Signal Switches, Multiplexers, Decoders Feature Summary

• Dual 2:1 multiplexers with LVDS compatible outputs
• Internal input termination with VT pin access
• Ultra-low jitter design for high-speed signals
• CMOS/TTL compatible MUX select inputs

Signal Switches, Multiplexers, Decoders Applications

• Redundant clock/data switchover
• SONET/SDH multi-channel select applications
• Fibre Channel applications
• GigE applications

Signal Switches, Multiplexers, Decoders Procurement Notes

Verify the specific ordering suffix (e.g., UMI vs. UMIG) to confirm lead finish and packaging type. Confirm that the application environment remains within the specified 2.5V supply voltage limits and the –40°C to +85°C operating temperature range. Ensure proper thermal management by soldering the exposed pad to the ground plane as required by the MLF package specifications.

Signal Switches, Multiplexers, Decoders Selection Notes

Select this component when a dual 2:1 multiplexer with integrated input termination is required for LVDS signal routing. Consider the SY89543L if the system design utilizes a 3.3V power supply instead of 2.5V. Evaluate the SY89544U or SY89546U if higher channel density or fanout capabilities are needed beyond the dual 2:1 configuration provided by this part.

Signal Switches, Multiplexers, Decoders Part Context

The SY89542UMI belongs to Micrel’s Precision Edge product family, designed for high-speed digital signal processing and communication systems. It integrates two independent multiplexers into a compact 32-pin MLF package, facilitating space-constrained PCB layouts while maintaining signal integrity through low jitter performance and internal termination networks.

Signal Switches, Multiplexers, Decoders Replacement Considerations

SY89543L

Signal Switches, Multiplexers, Decoders FAQ

How does the SY89542UMI 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. In this configuration, the corresponding VT pin must be left open.

What logic standards can the SY89542UMI accept at its inputs?

The unique input termination and VT pin allow the device to accept DC-coupled and AC-coupled inputs supporting LVDS, LVPECL, and CML logic standards without requiring external resistor-bias and termination networks.