9DBU0841AKLF

Overview

The 9DBU0841AKLF is a clock buffer manufactured by Renesas Electronics Corporation, designed for PCI Express applications. It features one differential input and eight differential outputs with an input-to-output ratio of 1:8. The device operates on a single 3.3V supply voltage (3.135V to 3.465V) and supports frequencies up to 200MHz. It utilizes HCSL signaling for both input and output. The component is housed in a 48-VFQFPN package with dimensions of 6x6 mm and includes an exposed pad. It is rated for operation within a temperature range of -40°C to +85°C.

Feature Summary

• Eight-channel differential clock buffer supporting PCIe Gen1/Gen2/Gen3 standards
• HCSL input/output signaling with 1:8 distribution ratio
• Operates at frequencies up to 200MHz with a 3.3V power supply
• Available in a compact 48-VFQFPN (6x6mm) surface-mount package

Applications

• PCI Express riser cards
• NVMe storage systems
• Networking accelerators
• Industrial control and embedded systems

Procurement Notes

Verify the specific suffix 'AKLF' against official Renesas documentation to confirm pinout and electrical characteristics, as suffixes often denote packaging or temperature variants. Confirm RoHS compliance status and moisture sensitivity level (MSL) requirements prior to assembly. Check for active product change notifications (PCNs) regarding manufacturing site changes or material updates that may affect qualification.

Selection Notes

Select this component when a low-jitter, high-speed clock distribution solution is required for multiple PCIe endpoints. Ensure the design accommodates the 48-pin VFQFPN footprint and thermal requirements. Verify that the system's reference clock source matches the HCSL input specifications and that the 3.3V supply rail stability meets the IC's operating voltage range of 3.135V to 3.465V.

Part Context

This part belongs to the Renesas 9DBU series of PCIe clock buffers. It serves as a fanout buffer to distribute a single reference clock signal to eight downstream devices, maintaining signal integrity across high-speed interfaces. It is distinct from clock generators, which create clocks from scratch, as this device primarily buffers and distributes existing clock signals.

Replacement Considerations

Direct replacements should be sought from the Renesas 9DBU series or compatible PCIe clock buffers with identical 1:8 ratios and HCSL I/O. Verify that any substitute matches the 48-VFQFPN package dimensions and thermal performance. Cross-reference datasheets for jitter specifications and supply voltage compatibility to ensure functional equivalence.