8V79S680NLGI

Clock Buffers, Drivers Overview

The Renesas 8V79S680NLGI is a clock buffer and divider designed for JESD204B applications. It features a 2:16 input-to-output ratio with four circuits, supporting frequencies up to 3 GHz. The device provides LVDS and LVPECL differential outputs and operates on a 3.135V to 3.465V supply within a -40°C to +85°C temperature range. Packaged in a 64-VFQFPN (9x9 mm) exposed pad case, it integrates dividers and phase delay circuits for precise signal distribution.

Clock Buffers, Drivers Feature Summary

• Supports clock frequencies up to 3 GHz with low output noise floor of -158.8dBc/Hz at 245.76MHz
• Four output channels providing 16 differential outputs (8 dedicated clocks, 8 configurable SYSREF/clocks)
• Integrated dividers (÷1, ÷2, ÷4, ÷6, ÷8, ÷12, ÷16) and programmable phase delay circuits
• Configurable LVDS/LVPECL output types with amplitude control and power-saving modes

Clock Buffers, Drivers Applications

• JESD204B compliant wireless base station radio equipment
• High-speed data converter clock distribution
• LTE/LTE-A radio board implementation requiring deterministic phase relationships

Clock Buffers, Drivers Procurement Notes

Verify the specific ordering suffix against the manufacturer datasheet to confirm package type and moisture sensitivity level. Ensure the procurement channel provides official RoHS compliance documentation. Confirm that the 64-VFQFPN package matches the required PCB footprint dimensions of 9mm x 9mm.

Clock Buffers, Drivers Selection Notes

Select this component when designing systems requiring JESD204B synchronization with low additive jitter. Verify that the 3.3V core voltage and 1.8V digital control I/O requirements align with the system power architecture. Ensure the design accommodates the 64-pin VFQFPN package constraints and thermal dissipation needs.

Clock Buffers, Drivers Part Context

This part belongs to the 8V79S680 series of fanout buffers and dividers. It is specifically optimized for distributing high-frequency clocks and low-frequency SYSREF signals in complex digital systems. The device eliminates phase ambiguity between dividers across multiple chips.

Clock Buffers, Drivers Replacement Considerations

Check for direct pin-compatible alternatives within the same Renesas family. Verify if updated revisions offer improved thermal performance or different packaging options while maintaining the 3GHz frequency capability.