SY89547LMI

Overview

The SY89547LMI is a high-speed differential multiplexer manufactured by Microchip Technology in a 32-pin MLF package. It operates on a single 3.3V supply within the industrial temperature range of –40°C to +85°C. The device selects among four differential inputs and provides two copies of the selected signal via LVDS outputs with a typical swing of 350mV. It supports data rates up to 3.2Gbps, featuring an input-to-output propagation delay of 440ps typ. Internal termination allows for AC- or DC-coupled interfaces.

Feature Summary

• Selects among four differential inputs and provides two identical copies of the selected signal
• Features internal input termination accessible through VT pins for flexible interface configurations
• Supports both AC-coupled and DC-coupled connections for LVDS, LVPECL, and CML standards
• Designed for ultra-low jitter performance to maintain signal integrity at high speeds

Applications

• SONET/SDH multi-channel select applications
• Fibre Channel applications
• GigE applications

Procurement Notes

Verify that the specific ordering suffix matches the required lead finish and packaging format. The 'MI' suffix indicates a tube package with Sn-Pb finish, while 'MG' denotes Pb-free NiPdAu finish. Confirm the exact part number against the manufacturer's current datasheet to ensure compatibility with RoHS directives and design requirements.

Selection Notes

Choose this component when a 4:1 differential multiplexer with dual output fanout is required. It is suitable for systems needing internal termination to simplify PCB layout. Consider the SY89546U if a 2.5V supply is preferred, or the SY89544U if only a single differential output is necessary.

Part Context

This device belongs to Micrel’s Precision Edge product family, designed for high-speed signal routing. It integrates a 4:1 multiplexer with a 1:2 fanout buffer. The MLF-32 package facilitates compact board designs while providing thermal management through an exposed pad connected to ground.

Replacement Considerations

For 2.5V operation, consider the SY89546U. For single-ended output requirements, evaluate the SY89544U or SY89545L. These parts share similar functional characteristics but differ in voltage supply and output configuration.