SY89859UMY

Overview

The SY89859UMY is a low jitter, low-power, high-speed 8:1 multiplexer with a 1:2 differential fanout buffer. It distributes clock frequencies from DC to >2.5GHz and data rates up to 2.5Gbps. The device features a unique 3-pin input termination architecture that directly interfaces to AC- or DC-coupled differential signals as small as 100mV without level shifting or external termination resistor networks. Outputs are 800mV, 100K-compatible LVPECL with rise/fall times less than 180ps. It operates from a 2.5V ±5% or 3.3V ±10% supply over the industrial temperature range of –40°C to +85°C.

Feature Summary

• Patent-pending channel-to-channel isolation design significantly improves crosstalk-induced jitter performance.
• Unique patented input termination and VT pin accept DC- and AC-coupled inputs including CML, PECL, and LVDS.
• Ultra-low jitter design guarantees <1ps RMS random jitter and <10ps peak-to-peak deterministic jitter.

Applications

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

Procurement Notes

Verify the specific ordering suffix against official documentation to confirm package type and reel configuration. Confirm RoHS compliance status and moisture sensitivity level requirements for your assembly process. Ensure the selected variant matches the required operating temperature range and voltage specifications for your system design.

Selection Notes

Select this component when precision telecom and enterprise server distribution require an 8:1 mux with integrated fanout. Consider its internal termination for simplified interface designs with CML, PECL, or LVDS sources. Evaluate its ultra-low jitter characteristics for high-speed signal integrity requirements in demanding environments.

Part Context

The SY89859U belongs to Micrel’s Precision Edge product line, designed for high-speed, low-power applications. It is part of a family of multiplexers optimized for precision timing and distribution tasks in telecommunications and enterprise infrastructure.

Replacement Considerations

SY58037U (CML Fanout), SY58038U (LVPECL Fanout), SY58039U (400mV LVPECL Fanout). Verify output logic compatibility and specific application requirements before substitution.

FAQ

How does the SY89859UMY handle input termination?

It utilizes a unique 3-pin input termination architecture where each side of the differential input pair terminates to a VT pin through 50 Ω, eliminating the need for external termination resistor networks.

What is the maximum operating frequency?

The device supports clock frequencies greater than 2.5GHz and data rates up to 2.5Gbps.