SY89875UMI

Overview

The SY89875UMI is a low-skew, low-jitter programmable clock divider and 1:2 fanout buffer manufactured by Micrel. It accepts high-speed differential inputs (CML, LVPECL, LVDS, HSTL) and divides the frequency using ratios of 1, 2, 4, 8, or 16. The device operates at 2.5V with a maximum input frequency exceeding 2.0GHz. Key electrical parameters include less than 15ps within-device skew, under 10ps peak-to-peak total jitter, and under 1ps RMS cycle-to-cycle jitter. It features an internal termination network accessible via a VT pin for flexible interface compatibility.

Feature Summary

• Integrated programmable divider with ratios of 1, 2, 4, 8, and 16
• Low jitter performance: <10ps PP total jitter and <1ps RMS cycle-to-cycle jitter
• Flexible input termination via VT pin supporting CML, PECL, LVDS, and HSTL
• LVDS compatible outputs with internal 100Ω termination capability

Applications

• SONET/SDH line cards
• Transponders
• High-end multiprocessor servers

Procurement Notes

Verify component authenticity through authorized channels as the device was originally manufactured by Micrel. Confirm package integrity for the 16-pin MLF variant. Ensure design compliance with absolute maximum ratings to prevent permanent damage. Check for updated documentation regarding lifecycle status and availability from current distributors.

Selection Notes

Select this component when low jitter and precise clock division are required for high-speed digital systems. The device supports multiple logic standards via the VT pin, simplifying interface design. Ensure the operating voltage is maintained at 2.5V ±5%. Consider thermal management requirements for the exposed pad in the MLF-16 package during PCB layout.

Part Context

This part belongs to the Precision Edge family of clock distribution components. Originally produced by Micrel, Inc., it serves as a specialized solution for generating lower-frequency clocks from high-speed references. The device integrates both division and buffering functions into a single compact package.

Replacement Considerations

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