9DBV0431AKLFT

Overview

The 9DBV0431AKLFT is a PCIe clock buffer and driver manufactured by Renesas Electronics. It operates with a single HCSL input and provides four HCSL outputs, functioning as a 1:4 fanout device. The maximum operating frequency is 137.5 MHz, suitable for PCI Express Gen 1 through Gen 3 applications. The component requires a supply voltage between 1.7 V and 1.9 V and supports an industrial temperature range from -40°C to +85°C. It is housed in a 32-QFN (5x5 mm) package with exposed pad for surface mount installation.

Feature Summary

• Provides 1:4 differential-to-differential or single-ended-to-single-ended clock distribution
• Supports PCI Express Gen 1/2/3 Common Clocked architecture
• Integrated output termination resistors for direct connection to transmission lines
• Low power consumption with 1.8 V nominal supply operation

Applications

• PCI Express root complex clock distribution
• Switch fabric clock buffering
• Server and storage system timing networks

Procurement Notes

Verify the suffix 'KILFT' against official Renesas documentation to confirm RoHS compliance and lead-free status. Confirm the specific tape and reel quantity required for automated assembly processes. Ensure the ordering part number matches the exact package variant and temperature grade specified in the current datasheet revision.

Selection Notes

Select this component when a low-jitter, high-drive 1:4 PCIe clock buffer is required for Gen 1 to Gen 3 interfaces. Compare propagation delay and jitter specifications against other family members like the 9DBV0641 if more outputs are needed. Verify that the HCSL input/output signaling levels match the source and load requirements of the target design.

Part Context

This device belongs to the Renesas 9DBV series of PCIe clock buffers. It serves as a replacement for legacy discrete buffer solutions, offering integrated termination and reduced board space. The 32-QFN package allows for compact layout in high-density server and networking equipment designs requiring reliable clock distribution.

Replacement Considerations

Direct pin-compatible alternatives within the same family include the 9DBV0641 for six-output requirements. Cross-family replacements may require schematic and layout modifications due to differing pinouts or electrical characteristics.