SY58020UMI

Clock Buffers, Drivers Overview

The SY58020UMI is a high-speed, fully differential 1:4 CML fanout buffer manufactured by Microchip Technology (originally Micrel). It operates from a 2.5V ±5% or 3.3V ±10% supply and supports clock frequencies up to 6GHz. The device features internal I/O termination, accepting input signals as low as 100mV without external level-shifting networks. It provides four identical output copies with less than 15ps of skew and typical additive phase jitter of 27fsRMS. Outputs are optimized for 400mV swing into 50Ω loads with rise/fall times under 60ps. It functions within the industrial temperature range of –40°C to +85°C.

Clock Buffers, Drivers Feature Summary

• Precision 1:4 CML fanout buffer with guaranteed AC performance over temperature/voltage
• Maximum operating frequency greater than 6GHz with propagation delay under 260ps
• Low-jitter performance with 27fsRMS typical additive phase jitter at 622MHz carrier
• Unique patented input termination architecture supporting DC-coupled and AC-coupled LVPECL, LVDS, and CML inputs

Clock Buffers, Drivers Applications

• SONET and GigE clock distribution
• Fibre Channel clock and data distribution
• Backplane distribution
• Data distribution for OC-48, OC-48+FEC, and XAUI
• High-end, low skew, multiprocessor synchronous clock distribution

Clock Buffers, Drivers Procurement Notes

Verify that the ordering suffix 'MI' corresponds to the QFN-16 package variant documented in the official datasheet. Confirm the manufacturer origin, as the component was originally produced by Micrel before acquisition by Microchip Technology. Ensure compliance with RoHS requirements and check for specific humidity sensitivity handling during storage and assembly.

Clock Buffers, Drivers Selection Notes

Select this component when a 1:4 fanout ratio with CML outputs is required for high-speed clock distribution. It is suitable for applications needing low skew (<15ps) and low jitter (<27fsRMS). Consider alternative models like SY58021U or SY58022U if LVPECL outputs with different voltage swings (800mV or 400mV) are preferred instead of standard CML.

Clock Buffers, Drivers Part Context

The SY58020U belongs to Micrel’s Precision Edge product line, designed for high-speed timing and communications markets. It is part of a family of fanout buffers that includes variants with different output swing characteristics. The device utilizes a unique 3-pin input termination architecture to simplify interface design for various logic families.

Clock Buffers, Drivers Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation.