6V49R904-074NLGW38

Overview

The 6V49R904-074NLGW38 is a clock synthesizer manufactured by Renesas Electronics Corporation. It operates with a supply voltage of 3.3V and supports input frequencies ranging from 1 MHz to 200 MHz. The device features low additive phase jitter, typically 350 fs RMS. It utilizes an LP-HCSL output signaling format and includes integrated differential termination resistors for direct connection to transmission lines. The component is housed in a compact 4mm x 4mm 24-VFQFPN package with a pitch of 0.5 mm.

Feature Summary

• Supports PCIe Gen 1–7 Common Clocked (CC) and Separate Reference Independent Spread (SRIS) architectures
• Provides selectable asynchronous or glitch-free switching modes for flexible system integration
• Offers integrated output terminations compatible with 85Ω or 100Ω transmission lines

Applications

• PCIe Gen 1–7 clock distribution systems
• High-speed digital interface synchronization
• Systems requiring spread spectrum tolerance for EMI reduction

Procurement Notes

Verify the specific suffix -074NLGW38 against official Renesas documentation to confirm pinout, temperature range, and packaging details. Ensure compatibility with 3.3V logic levels and LP-HCSL requirements. Cross-reference the part number with authorized distributors to avoid counterfeit components. Confirm that the selected variant meets the required PCIe generation specifications for your design.

Selection Notes

Select this component when designing interfaces requiring precise clock synthesis for PCIe Gen 1 through Gen 7 standards. Consider its integrated termination capabilities if board space is limited, as it eliminates external resistors. Evaluate the glitch-free switching feature if seamless transition between clock sources is critical for system stability during power-up or mode changes.

Part Context

This part belongs to Renesas' full-featured PCIe clock family, designed to support high-speed serial link standards. It addresses the need for compact, low-power clock solutions in modern computing and communication hardware. The device integrates functions typically requiring multiple discrete components, simplifying the overall system architecture.

Replacement Considerations

Check for direct substitutes within the 6V49 series or other Renesas PCIe clock multiplexers. Verify pin-to-pin compatibility and electrical parameter equivalence before substitution. Consult official replacement guides for updated part numbers.