SY89831UMI-TR

Clock Buffers, Drivers Overview

The SY89831UMI-TR is an ultra-precision 1:4 LVPECL fanout buffer and translator from the Precision Edge family. It supports a typical throughput of DC to 2.5GHz with a maximum frequency of 2.0GHz at 450mV output swing. The device features a unique internal termination design accessible via a VT pin, allowing compatibility with AC- or DC-coupled differential inputs as small as 100mV. Within-device skew is guaranteed to be less than 20ps (typical 5ps). It operates on a 2.5V ±5% or 3.3V ±10% supply and includes a VREF-AC reference output for AC-coupled applications.

Clock Buffers, Drivers Feature Summary

• Ultra-low jitter design with 62fs RMS phase jitter (typical) and 5ps within-device skew (typical)
• Unique patent-pending input termination and VT pin accepts DC- and AC-coupled differential inputs
• Guaranteed AC performance over temperature and voltage with 350ps propagation delay (typical)
• Includes VREF-AC reference output for AC-coupled applications

Clock Buffers, Drivers Applications

• Processor clock distribution
• SONET clock distribution
• Fibre Channel clock distribution
• Gigabit Ethernet clock distribution

Clock Buffers, Drivers Procurement Notes

Verify that the ordering suffix 'MI' corresponds to the MLF-16 package and industrial temperature range (-40°C to +85°C) as specified in the datasheet's Ordering Information table. Confirm the presence of the Pb-Free bar-line indicator and NiPdAu lead finish. Ensure the TR suffix indicates Tape and Reel packaging. Cross-reference the manufacturer designation, noting the transition from Micrel to Microchip Technology.

Clock Buffers, Drivers Selection Notes

Select this component when interfacing with various logic standards requiring flexible input termination. The VT pin allows access to the internal termination network, simplifying interface designs for both AC- and DC-coupled signals. Use the synchronous EN pin for precise enable/disable control that occurs only during logic low states. Consider the 16-pin MLF package for space-constrained PCB layouts requiring efficient thermal management through the exposed pad.

Clock Buffers, Drivers Part Context

The SY89831U belongs to Micrel's high-speed clock synchronization family, now under Microchip Technology. It is part of the Precision Edge series, designed for ultra-low skew applications. Related products include the SY89830U (1:4 LVPECL with MUX input), SY89832U (LVDS version), and SY89833AL (3.3V LVDS version). The device utilizes Micrel's unique 3-input termination architecture for clean, stub-free interfaces.

Clock Buffers, Drivers Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation. Consult the manufacturer's website for alternative I/O combinations within the high-speed clock synchronization family.