SY89467UHY

Clock Buffers, Drivers Overview

The SY89467UHY is a precision LVPECL 1:20 fanout buffer featuring a 2:1 differential input multiplexer and internal termination with fail-safe input protection. It operates from a 2.5V ±5% or 3.3V ±10% supply voltage across an industrial temperature range of –40°C to +85°C. The device provides DC-to >1.5 GHz throughput with propagation delay under 1200ps and rise/fall times less than 270ps. It incorporates ultra-low jitter characteristics, including less than 1ps RMS random jitter and less than 10ps peak-to-peak total jitter.

Clock Buffers, Drivers Feature Summary

• 2:1 Differential Input Multiplexer with Fail-Safe Input (FSI) to prevent metastable output conditions during clock failure
• Unique patented internal termination architecture accepting AC- or DC-coupled inputs as small as 100mV without external level shifting
• Ultra-low jitter design with <1ps RMS cycle-to-cycle jitter and <0.7ps RMS MUX crosstalk induced jitter
• Synchronous Output Enable (OE) and asynchronous Select (SEL) inputs for flexible control

Clock Buffers, Drivers Applications

• Fail-safe clock protection
• SONET clock distribution
• Backplane distribution

Clock Buffers, Drivers Procurement Notes

Verify the package type is TQFP-64 (T64-1) and confirm the lead finish is Matte-Sn Pb-Free. Ensure the operating range matches the Industrial specification (-40°C to +85°C). Cross-reference the part number suffix 'HY' with the manufacturer's documentation to confirm it denotes the specific tape and reel or tray packaging configuration if required for assembly.

Clock Buffers, Drivers Selection Notes

Select this component when a high-speed LVPECL fanout buffer with integrated multiplexing is required. It is suitable for applications demanding low jitter and robust input interface flexibility via internal termination. Verify that the supply voltage requirements align with either 2.5V or 3.3V systems and ensure the thermal management strategy accounts for the power dissipation in the 64-pin TQFP package.

Clock Buffers, Drivers Part Context

The SY89467UHY belongs to Micrel’s Precision Edge product line, designed for high-speed clock distribution. It is manufactured by Microchip Technology following the acquisition of Micrel. The device is part of a family that includes similar fanout buffers like the SY89468U, offering differentiated features such as LVDS outputs instead of LVPECL.

Clock Buffers, Drivers Replacement Considerations

The SY89468U is a related product offering LVDS outputs instead of LVPECL. Direct replacement requires verifying signal compatibility between LVPECL and LVDS levels. No other specific substitute part numbers are confirmed in the provided documentation.