Renesas 9DBV0641 PCIe Gen5 Clock Buffer

Renesas 9DBV0641 PCIe Gen5 Clock Buffer

The Renesas 9DBV0641 is a low-power, 1.8V PCIe clock buffer with six differential LP-HCSL outputs. It supports PCIe Gen1 through Gen5 clock distribution and can operate as a zero-delay buffer (ZDB) or fanout buffer (FOB).

With integrated 100Ω output impedance, configurable PLL operation and low additive jitter, the 9DBV0641 is designed for PCIe reference clock distribution in servers, storage systems and high-speed computing equipment.

9DBV0641 Key Specifications

Note: Jitter and power specifications depend on PLL mode, measurement bandwidth and operating conditions. Refer to the official datasheet when evaluating PCIe Gen5 clock compliance.

Available Ordering Part Numbers

All four versions use a 40-pin VFQFPN package. The main ordering differences are operating temperature grade and packaging. Buyers should confirm the complete part number, required quantity and current supply channel.

LP-HCSL Outputs and PCIe Gen5 Clock Design

The 9DBV0641 provides six LP-HCSL differential clock outputs with integrated 100Ω output impedance for direct connection to appropriately designed 100Ω differential transmission lines.

For PCIe Gen5 applications, engineers should verify:

• Reference clock compatibility: Confirm the input clock frequency, HCSL signaling level and supported clock architecture.

• Additive jitter: Evaluate jitter using the correct PCIe compliance measurement conditions and the complete clock distribution path.

• Clock distribution: Verify output skew, trace routing, impedance control and reference clock topology.

• PLL configuration: Select the appropriate PLL bandwidth or bypass mode for system requirements.

• Power management: Use dedicated output-enable controls when individual clock outputs must be disabled.

The device supports common clock, SRNS and SRIS architectures. It also accepts spread-spectrum clock inputs and provides configurable slew rate and output amplitude.

Applications

• PCIe Gen5 reference clock distribution

• Enterprise servers and storage systems

• PCIe expansion cards and high-speed computing platforms

• FPGA and ASIC clock distribution

• PCIe switch and endpoint clock networks

FAQ

Does the 9DBV0641 support PCIe Gen5?

Yes. The 9DBV0641 supports PCIe Gen1–Gen5 clock applications. The datasheet specifies PCIe Gen5 common-clock additive jitter below 40fs RMS under defined conditions.

What is the difference between 9DBV0641AKLF and 9DBV0641AKILF?

The AKLF version is rated for 0°C to +70°C, while the AKILF version supports −40°C to +85°C. Both share the same package and clock buffer architecture.

Does the 9DBV0641 require external output termination resistors?

The device includes integrated output impedance for direct connection to properly designed 100Ω differential transmission lines. Engineers must still verify the PCB clock interface and complete signal path.

Datasheet and Manufacturer Resources

• 9DBV0641 Official Product Page

• 9DBV0641 Datasheet

Renesas has announced the transfer of its Timing product portfolio to SiTime. For new designs, sourcing and technical support, confirm the latest manufacturer information and approved distribution channels.

9DBV0641 Pricing and Availability

Looking for 9DBV0641AKLF, 9DBV0641AKLFT, 9DBV0641AKILF or 9DBV0641AKILFT?

Contact DataStorageIC with your required part number, quantity, temperature grade and packaging preference. Our team can assist with RFQ requests, sourcing and specification confirmation.