SY89547LMI-TR

Overview

The SY89547LMI-TR is a high-speed differential multiplexer from the Precision Edge family, manufactured by Microchip Technology. It selects among four differential inputs and provides two copies of the selected input via LVDS outputs. The device supports data rates up to 3.2Gbps with a propagation delay of 440ps typical. It operates on a single 3.3V supply within a -40°C to +85°C temperature range. Packaged in a 32-pin MLF (5mm x 5mm) format, it features internal input termination accessible through VT pins for flexible AC or DC coupling.

Feature Summary

• Selects among four differential inputs and provides two identical copies of the selected signal
• Features unique internal input termination design that minimizes crosstalk and allows access to the termination network
• Ultra-low jitter architecture ensures clean interface performance across varying conditions
• Accepts both AC-coupled and DC-coupled inputs without requiring external resistor-bias networks

Applications

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

Procurement Notes

Verify the specific ordering suffix 'MI' corresponds to the Sn-Pb lead finish as documented in the official datasheet. Confirm the '-TR' suffix indicates tape and reel packaging. Ensure the component meets RoHS requirements if applicable, noting that Pb-free variants carry different suffixes such as 'MG'. Cross-reference the manufacturer part number against current Microchip documentation to confirm availability and revision status.

Selection Notes

Choose this component when a 4:1 differential multiplexer with dual output fanout is required. It is suitable for designs needing internal termination flexibility for various logic standards like LVDS, LVPECL, and CML. Consider alternatives like the SY89546U for 2.5V operation or the SY89545L if only one differential output is needed. Ensure the system can accommodate the 3.3V supply requirement and the specified thermal management for the MLF package.

Part Context

This device belongs to Micrel's Precision Edge product family, now under Microchip Technology. It is designed for high-speed signal routing where low jitter and minimal crosstalk are critical. The SY89547L complements other devices in the series, such as the SY89544U and SY89545L, offering specific functionality for multi-channel selection with redundant output distribution in a compact surface-mount package.

Replacement Considerations

Public confirmed substitute part numbers include SY89545LMG.

FAQ

How does the device handle input termination?

The SY89547L features a unique 3-pin internal termination design. Each side of the differential input pair terminates to a VT pin through 50Ω, allowing access to the termination network for maximum interface flexibility.

What types of input coupling are supported?

The device accepts both AC-coupled and DC-coupled inputs, including LVDS, LVPECL, and CML standards, without the need for external resistor-bias and termination networks.

What is the maximum operating frequency?

The maximum operating frequency is 3.2 Gbps for NRZ data and 4 GHz for clock signals.