SY89871UMG-TR

Clock Buffers, Drivers Overview

The SY89871UMG-TR is a programmable clock divider and fanout buffer featuring LVPECL outputs. It accepts high-speed differential inputs (CML, LVDS, PECL, HSTL) via an internal termination network accessible through the VT pin. The device provides two phase-matched output banks: Bank A passes the input frequency undivided, while Bank B divides the frequency by 2, 4, 8, or 16 based on parallel programming pins. It operates on a 2.375V to 3.6V supply with a maximum toggle frequency of 2.5GHz and supports AC or DC coupling.

Clock Buffers, Drivers Feature Summary

• Programmable divide-by-2, 4, 8, or 16 ratios for Bank B outputs
• Internal 50Ω input termination with VT pin for flexible interface compatibility
• Two matched-delay output banks (Bank A pass-through, Bank B divided)
• Low jitter design with typical RMS phase jitter of 231fs

Clock Buffers, Drivers Applications

• OC-3 to OC-192 SONET/SDH applications
• Transponders
• Oscillators
• SONET/SDH line cards

Clock Buffers, Drivers Procurement Notes

Verify that the ordering suffix 'TR' corresponds to the tape and reel packaging variant as specified in the datasheet. Confirm the package type is QFN-16 and check for the Pb-Free bar line indicator marking. Ensure the operating temperature range meets industrial requirements (-40°C to +85°C).

Clock Buffers, Drivers Selection Notes

Select this component when a single-ended or differential clock source requires division into multiple lower-frequency signals with precise phase matching. The VT pin allows adaptation to various logic standards without external termination components. Verify that the required divider ratio matches the available S1/S0 pin configurations.

Clock Buffers, Drivers Part Context

This part belongs to the Precision Edge family of clock dividers and buffers. It serves as a solution for distributing and dividing high-speed clock signals in telecommunications infrastructure. The device integrates both the divider function and the fanout buffer into a single 16-pin QFN package.

Clock Buffers, Drivers Replacement Considerations

The SY89874U is a related product offering similar functionality but includes a 1:2 fanout buffer in addition to the programmable divider. Verify if the additional fanout capability is required for the specific application layout.

Clock Buffers, Drivers FAQ

How is the input termination configured?

The device features internal 50Ω termination resistors connected to the VT pin. For CML and LVDS inputs, the VT pin should be left floating.

What are the available divider ratios?

The divider ratios are 2, 4, 8, and 16, selected via the S1 and S0 parallel programming pins.

Can the device handle AC-coupled inputs?

Yes, the device includes a VREF-AC reference voltage (approx. VCC–1.4V) specifically designed for AC-coupled applications.