SY89874UMG

Overview

The SY89874UMG is a low-skew, low-jitter integrated circuit featuring a programmable clock divider and a 1:2 fanout buffer. It accepts high-speed differential inputs (CML, LVDS, PECL, HSTL) and divides the frequency by ratios of 2, 4, 8, or 16, or passes through the reference clock. The device provides two differential LVPECL outputs with guaranteed AC performance up to 2.5 GHz maximum output toggle frequency. Key electrical parameters include a supply voltage range of 2.375V to 3.63V, within-device skew of less than 15 ps, total jitter under 10 ps peak-to-peak, and cycle-to-cycle jitter under 1 ps RMS.

Feature Summary

• Integrated programmable clock divider with ratios of 2, 4, 8, and 16, plus straight pass-through mode.
• Flexible input termination via VT pin supports DC-coupled and AC-coupled CML, PECL, LVDS, and HSTL signals.
• Low jitter design ensuring <10 ps PP total jitter and <1 ps RMS cycle-to-cycle jitter.
• Includes /RESET and Output Disable functions controlled by LVTTL/CMOS logic levels.

Applications

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

Procurement Notes

Verify the ordering suffix 'TR' if tape and reel packaging is required instead of the standard tube. Confirm that the exposed pad on the QFN package is soldered to a ground plane for proper thermal management and electrical connection. Ensure the application voltage aligns with the specified 2.5V or 3.3V operating ranges.

Selection Notes

Select this component when a single differential input must be divided and distributed to two LVPECL loads. Verify compatibility with the source signal standard (CML, LVDS, PECL, or HSTL) and ensure the required division ratio matches the S0-S2 pin configuration. Check that the system power supply falls within the 2.375V to 3.63V window.

Part Context

This device belongs to the SY89874 family, specifically designed as a 2.5 GHz Any-Diff-In-to-LVPECL Programmable Clock Divider/Fanout Buffer. It utilizes a 16-pin 3 mm x 3 mm QFN package. The 'UMG' suffix indicates a 2.5V/3.3V input voltage capability, a 3 mm x 3 mm QFN-16 package, and an operating temperature range of –40°C to +85°C.

Replacement Considerations

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