SY89856UMG

Clock Buffers, Drivers Overview

The SY89856UMG is a high-speed, low-power 1:6 LVPECL fanout buffer featuring an integrated 2:1 differential input multiplexer. It supports clock frequencies up to 2.0 GHz with propagation delays under 400 ps and output skew below 30 ps. The device operates from a 2.5V ±5% or 3.3V ±10% supply, consuming approximately 225 mW at 2.5V. It utilizes Micrel’s unique 3-pin input termination architecture for direct interface with AC- or DC-coupled signals as small as 100 mV without external level shifting. Packaged in a 32-pin QFN (5mm x 5mm) format, it ensures ultra-low jitter performance suitable for precision timing applications.

Clock Buffers, Drivers Feature Summary

• Integrated 2:1 MUX input enables redundant clock switchover functionality
• Unique 3-pin input termination accepts AC/DC-coupled CML, PECL, and LVDS signals directly
• Ultra-low jitter design with 40 fs RMS phase jitter and <30 ps output-to-output skew
• Low power consumption of 225 mW typical at 2.5V supply

Clock Buffers, Drivers Applications

• Redundant clock distribution systems
• SONET/SDH clock and data distribution networks
• Fibre Channel distribution infrastructure
• Gigabit Ethernet clock distribution

Clock Buffers, Drivers Procurement Notes

Verify the ordering suffix 'TR' if tape and reel packaging is required; the base part number typically denotes tube packaging. Confirm that the NiPdAu lead finish and Pb-Free status align with assembly requirements. Ensure the industrial temperature range (-40°C to +85°C) meets system environmental specifications before finalizing procurement.

Clock Buffers, Drivers Selection Notes

Select this component when a 1:6 LVPECL fanout with built-in redundancy switching is necessary. It is appropriate for designs requiring direct interfacing with various differential standards (CML, LVDS, PECL) without external termination networks. Consider the 32-pin QFN package constraints and thermal dissipation capabilities (35°C/W still-air) during PCB layout planning.

Clock Buffers, Drivers Part Context

The SY89856U belongs to Micrel’s Precision Edge® product line, designed for high-speed clock distribution. It serves as a specialized solution for applications demanding low skew and jitter performance while minimizing board space through integrated multiplexing and termination features.

Clock Buffers, Drivers Replacement Considerations

The SY58035U is a related device offering similar functionality but supporting higher frequencies up to 4.5 GHz. Verify pin compatibility and electrical characteristics when considering alternative fanout buffers within the same family.