SY89874UMG-TR

Overview

The SY89874UMG-TR is a low-skew, low-jitter programmable clock divider and fanout buffer manufactured by Microchip Technology. It accepts high-speed differential inputs (CML, LVPECL, LVDS, HSTL) and divides the frequency by ratios of 2, 4, 8, or 16, or passes through the reference clock. The device features integrated internal termination for flexible input interfacing and provides two differential LVPECL outputs. It operates on a single supply voltage of 2.5V ±5% or 3.3V ±10%, with a maximum output toggle frequency of 2.5 GHz. Key performance metrics include less than 15 ps within-device skew and less than 10 ps peak-to-peak total jitter.

Feature Summary

• Integrated programmable clock divider with ratios of 2, 4, 8, and 16, plus straight pass-through mode.
• Unique input termination architecture via VT pin supports DC-coupled and AC-coupled CML, PECL, LVDS, and HSTL signals.
• Low jitter design with <10 ps PP total jitter and <1 ps RMS cycle-to-cycle jitter.
• Parallel programming capability using LVTTL/CMOS compatible S0, S1, and S2 select pins.

Applications

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

Procurement Notes

Verify that the ordering suffix '-TR' corresponds to the Tape and Reel packaging format containing 1,000 units per reel, as specified in the Product Identification System. Confirm the package type is the 16-Lead 3 mm x 3 mm QFN with an exposed pad. Ensure the temperature range matches the 'G' suffix specification of –40°C to +85°C. Cross-reference the datasheet revision DS20006108B for accurate electrical characteristics.

Selection Notes

Select this component when a single differential input must be divided into multiple lower-frequency auxiliary clocks or buffered directly. The device is suitable for systems requiring precise frequency division from high-speed sources like 622 MHz or 1.25 GHz clocks. Consider the internal termination feature if minimizing external resistor networks for CML or LVDS interfaces is required. Verify that the 2.5V or 3.3V supply voltage aligns with the system power rails.

Part Context

The SY89874U belongs to Microchip's Precision Edge® family of clock drivers and distributors. The specific part number SY89874UMG-TR denotes the base device (SY89874), universal voltage input (U), 16-pin QFN package (M), industrial temperature range (G), and tape-and-reel packaging (TR). This distinguishes it from tube-packaged variants or other members of the SY8987x series with different I/O configurations.

Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation. Designers should consult Microchip sales offices for alternative components with similar divider and buffer functionalities.