SY89540UMI-TR

Signal Switches, Multiplexers, Decoders Overview

The SY89540UMI-TR is a low-jitter, high-speed 4x4 crosspoint switch optimized for precision telecom and enterprise server/storage distribution applications. It guarantees data-rates up to 3.2Gbps over temperature and voltage. The device operates from a 2.5V ±5% supply and is guaranteed over the full industrial temperature range of –40°C to +85°C. It features a patent-pending isolation design that significantly improves channel-to-channel crosstalk performance.

Signal Switches, Multiplexers, Decoders Feature Summary

• Provides flexible crosspoint switching between any input pairs to any output pair
• Features a unique 3-pin input termination architecture that directly interfaces to differential signals without level shifting or external termination resistor networks
• Includes a patent-pending isolation design that provides superior channel-to-channel crosstalk performance

Signal Switches, Multiplexers, Decoders Applications

• SONET/SDH channel select applications
• Fibre Channel multi-channel select applications
• Gigabit Ethernet multi-channel select applications

Signal Switches, Multiplexers, Decoders Procurement Notes

Verify the specific ordering suffix 'UMI-TR' against official Microchip documentation to confirm tape-and-reel packaging and lead finish specifications. Ensure compatibility with the required 44-pin MLF package dimensions and thermal characteristics for your PCB layout. Confirm RoHS compliance status as defined in the manufacturer's current product change notices.

Signal Switches, Multiplexers, Decoders Selection Notes

Select this component when designing systems requiring precise signal routing across multiple differential channels. It is suitable for environments demanding ultra-low jitter and fast rise/fall times. Consider its internal termination capabilities if minimizing external passive components is a priority. Verify that the 2.5V power supply requirement aligns with your system's voltage rails.

Signal Switches, Multiplexers, Decoders Part Context

This part belongs to Micrel’s Precision Edge product line, which focuses on high-speed, low-jitter solutions. Originally manufactured by Micrel, Inc., the product line was integrated into Microchip Technology following acquisition. The SY89540U series is designed to meet the rigorous timing and signal integrity requirements of modern telecommunications and data storage infrastructure.

Signal Switches, Multiplexers, Decoders Replacement Considerations

SY89540UMYTR

Signal Switches, Multiplexers, Decoders FAQ

How does the device handle AC-coupled inputs?

The SY89540U accepts AC-coupled differential inputs through its VREF_AC pins, which bias to VCC–1.2V. These pins should be connected to the VT pin and bypassed with a 0.01µF low ESR capacitor.

What is the default operational mode upon power-up?

The device defaults to buffer mode (IN to Q) if the LOAD and CONFIG control signals are not exercised. In this mode, the selected input signal is buffered to all four outputs.