SY89873LMI

Overview

The SY89873LMI is a 3.3V, low-skew, low-jitter clock divider and fanout buffer featuring precision LVDS outputs. It accepts any high-speed differential input (AC- or DC-coupled CML, LVPECL, HSTL, or LVDS) and divides the frequency using programmable ratios of ÷2, ÷4, ÷8, or ÷16. The device includes two output banks: Bank A provides an undivided pass-through copy of the input clock, while Bank B provides the divided output. Key performance metrics include a maximum output toggle frequency exceeding 2.0GHz, an input frequency capability over 3.0GHz, propagation delay under 800ps with matched delays between banks, and within-device skew less than 15ps.

Feature Summary

• Accepts any differential input standard (LVPECL, LVDS, CML, HSTL) via unique VT pin termination design
• Two LVDS output banks: Bank A (undivided pass-through) and Bank B (÷2, ÷4, ÷8, ÷16)
• Guaranteed AC performance: >2.0GHz fMAX output, <15ps skew, <800ps matched delay
• Low jitter design with <1ps RMS cycle-to-cycle jitter

Applications

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

Procurement Notes

Verify that the component is sourced from authorized distributors to ensure authenticity. Confirm the package marking matches '873L' and check for the Pb-free bar line indicator. Ensure the operating temperature range (-40°C to +85°C) aligns with system requirements.

Selection Notes

Select this part for applications requiring a 3.3V supply with LVDS outputs. For 2.5V applications, consider the SY89872U. If LVPECL outputs are required instead of LVDS, consider the SY89871U. The device supports both AC and DC coupling through the VT pin configuration.

Part Context

The SY89873LMI belongs to Micrel’s Precision Edge® timing and distribution family. It was originally manufactured by Micrel, Inc., which was later acquired by Microchip Technology. The device is designed for high-speed clock distribution in telecommunications and computing infrastructure.

Replacement Considerations

For 2.5V LVDS applications, use SY89872U. For LVPECL output requirements, use SY89871U. These are direct functional alternatives within the same product family with adjusted voltage levels or output types.