SY89854UMI TR

Clock Buffers, Drivers Overview

The SY89854UMI TR is a precision, high-speed, fully differential 1:4 LVPECL fanout buffer manufactured by Microchip Technology. It operates from a 2.5V ±5% or 3.3V ±10% supply and supports clock frequencies up to 3.5 GHz. The device provides four identical output copies with less than 20ps of skew and less than 10ps (pp) total jitter. It features a unique patent-pending 3-pin input termination architecture that accepts AC- or DC-coupled differential signals as small as 100mV without external level shifting or termination resistor networks.

Clock Buffers, Drivers Feature Summary

• Precision 1:4 LVPECL fanout buffer with guaranteed AC performance over temperature and supply voltage
• Ultra-low jitter design: <1ps RMS random jitter, <10ps PP deterministic jitter, and <10ps PP total jitter
• Unique patent-pending input termination and VT pin accepts DC-coupled and AC-coupled inputs (CML, PECL, LVDS)
• Typical 800mV LVPECL output swing with fast rise/fall times guaranteed to be less than 180ps

Clock Buffers, Drivers Applications

• SONET and All GigE clock distribution
• Fibre Channel clock and data distribution
• Backplane distribution

Clock Buffers, Drivers Procurement Notes

Verify the ordering suffix 'TR' indicates tape and reel packaging. Confirm the 'MI' designation corresponds to the industrial operating range (-40°C to +85°C). Ensure compatibility with the 16-pin QFN package type specified in the datasheet for this part number variant.

Clock Buffers, Drivers Selection Notes

Select this component when low power consumption (137mW typ at 2.5V) and ultra-low jitter are critical requirements. It is suitable for applications requiring interface flexibility with various signal types (LVDS, CML, PECL) due to its internal termination. Ensure the system can accommodate the 16-pin QFN package size (3mm x 3mm).

Clock Buffers, Drivers Part Context

The SY89854U belongs to Micrel’s Precision Edge® product line, known for high-speed, low-power differential logic. This specific part number represents the fanout buffer variant within the SY89854 family, designed for precise clock distribution in high-frequency digital systems.

Clock Buffers, Drivers Replacement Considerations

The SY58021U is a related product offering similar functionality but with a higher maximum frequency of 4GHz. Verify if the increased speed capability is necessary for the application before substituting.