651SDCGI

Overview

The Renesas 651SDCGI is a low-skew clock buffer from the 621S series, designed for high-speed signal distribution. It features four outputs and supports input frequencies up to 200 MHz. The device operates within a supply voltage range of 1.71 V to 3.465 V, accommodating 1.8 V to 3.3 V logic levels. Key electrical specifications include a maximum propagation delay of 4.5 ns and an RMS jitter performance of 50 fs. It is housed in a surface-mount tube package and functions reliably across an industrial temperature range of -40°C to +105°C.

Feature Summary

• Low skew output with 50 fs RMS jitter specification
• Four differential or single-ended outputs for fan-out applications
• Wide supply voltage operation from 1.71 V to 3.465 V
• Supports input clock frequencies up to 200 MHz

Applications

• High-speed serial link clock distribution
• Data converter reference clock buffering
• FPGA clock network expansion
• Telecommunications equipment timing systems

Procurement Notes

Verify the specific suffix 'GI' against the official datasheet to confirm package type and tape/reel versus tube packaging options. Confirm RoHS compliance status directly from the manufacturer's documentation prior to ordering. Check current production lifecycle status to ensure long-term availability for design-in purposes.

Selection Notes

Select this component when low phase noise and precise skew control are critical for system timing integrity. Ensure the required output load capacitance is within the specified limits for the 200 MHz operating frequency. Verify that the power supply voltage remains stable within the 1.71 V to 3.465 V window during all operational states.

Part Context

This part belongs to the Renesas 621S series of clock buffers. It serves as a replacement for legacy low-skew drivers in high-performance computing and communication infrastructure designs where signal integrity is paramount. The 651SDCGI provides a compact solution for distributing reference clocks to multiple downstream components.

Replacement Considerations

Consult the official Renesas cross-reference guide for verified pin-compatible alternatives. Ensure any substitute maintains the 50 fs RMS jitter specification and 200 MHz maximum input frequency capability.