621SDCGI8

Overview

The Renesas Electronics 621SDCGI8 is a low skew clock buffer from the 621S series, designed for high-speed signal distribution. It features one input and four outputs, supporting supply voltages between 1.8V and 3.3V. The device achieves a typical RMS jitter of 50fs and operates with a maximum input frequency of 200 MHz. Propagation delay is specified at a maximum of 4.5 ns. It functions within an industrial temperature range of -40°C to +105°C and is available in surface-mount packaging formats including cut tape and reel.

Feature Summary

• Low skew architecture with 50fs RMS jitter specification
• 1-to-4 output configuration for fan-out applications
• Supports 1.8V to 3.3V supply voltage ranges
• Maximum operating frequency of 200 MHz

Applications

• High-speed data communication systems
• Server and storage infrastructure clock distribution
• Telecommunications equipment timing networks

Procurement Notes

Verify component authenticity through authorized channels due to reported long delivery times and extended factory production cycles. Confirm package type availability, as the suffix '8' indicates specific reel or cut tape configurations distinct from tube packaging variants like the 621SDCGI. Ensure compliance with RoHS requirements prior to integration.

Selection Notes

Select this model when low phase noise and precise timing alignment are critical for multi-output clock trees. Compare against the 651SDCGI8 for identical electrical performance but different packaging options. Consider the 553SDCGI8 if slightly lower propagation delay (4 ns) is required, noting it belongs to the 553S series.

Part Context

This component belongs to the Renesas 621S family of clock buffers. It shares core specifications with the 651SDCGI8 but differs in standard packaging. The part number structure identifies the manufacturer, series, pin count, and package style, distinguishing it from other Renesas timing devices such as gate drivers or microcontrollers.

Replacement Considerations

The 651SDCGI8 offers equivalent electrical characteristics and may serve as a functional substitute depending on packaging requirements. Verify pin compatibility and thermal performance before substitution.