SY89859UMY-TR

Overview

The SY89859UMY-TR is a precision low-power 8:1 multiplexer with an integrated 1:2 LVPECL fanout buffer. It supports clock frequencies from DC to over 2.5GHz and data rates up to 2.5Gbps. The device features a unique 3-pin input termination architecture that accepts AC- or DC-coupled differential signals as small as 100mV without external level shifting or termination networks. It operates on a 2.5V ±5% or 3.3V ±10% supply, consuming 150mW typically at 2.5V. The component is housed in a 44-pin QFN package and functions within the industrial temperature range of –40°C to +85°C.

Feature Summary

• Integrates an 8:1 multiplexer with a 1:2 differential fanout buffer for signal distribution
• Features patent-pending channel-to-channel isolation design to minimize crosstalk-induced jitter
• Includes unique patented input termination accepting CML, PECL, and LVDS inputs directly
• Provides ultra-low jitter performance suitable for high-speed precision applications

Applications

• Data communication systems
• SONET/SDH data and clock applications
• Fibre Channel applications
• Gigabit Ethernet applications

Procurement Notes

Verify the specific ordering suffix 'TR' indicates tape and reel packaging when sourcing this component. Confirm the manufacturer origin, as the datasheet identifies Micrel, Inc., which may affect part marking and documentation availability. Ensure the procurement matches the industrial temperature range requirements and the 44-pin QFN package specifications provided in the official documentation.

Selection Notes

Select this component for designs requiring high-speed multiplexing with minimal signal degradation. It is suitable for environments needing direct interfacing with various differential logic families without additional termination resistors. Consider its power consumption and thermal characteristics relative to the PCB layout capabilities. Verify compatibility with the required operating voltage levels of 2.5V or 3.3V for the target system architecture.

Part Context

This component belongs to the Precision Edge product line, designed for high-speed and low-jitter performance. It serves as a critical interface solution in telecommunications and enterprise server distribution networks. The device combines multiplexing and buffering capabilities into a single compact package, reducing board space and complexity compared to discrete solutions.

Replacement Considerations

SY89859UMY