9DBU0941AKLFT

Overview

The 9DBU0941AKLFT is a PCI Express (PCIe) fanout buffer IC manufactured by Renesas Electronics. It features a single HCSL differential input and nine LP-HCSL differential outputs, providing a 1:9 distribution ratio. The device operates at a maximum frequency of 167MHz with a supply voltage range of 1.425V to 1.575V. Packaged in a 48-VFQFPN (6x6mm) surface-mount format, it supports PCIe Gen1-3 applications within an operating temperature range of 0°C to 70°C.

Feature Summary

• Provides 1:9 clock distribution from one HCSL input to nine LP-HCSL outputs
• Supports PCIe Gen1, Gen2, and Gen3 standards up to 167MHz
• Operates on a 1.5V supply rail (1.425V–1.575V)
• Housed in a compact 48-pin VFQFPN package

Applications

• PCI Express clock distribution for Gen1-3 systems
• Server and storage motherboard clocking architectures
• High-speed digital interface timing distribution

Procurement Notes

Verify the specific suffix 'KLFT' against the manufacturer's datasheet to confirm packaging details and material compliance. Confirm that the commercial temperature grade (0°C to 70°C) meets system requirements, as industrial variants may exist under different suffixes. Ensure compatibility with the 1.5V power domain before integration.

Selection Notes

Select this component when a single source clock must drive nine downstream PCIe receivers. The 1:9 ratio distinguishes it from other family members like the 9DBU0441 (1:4) or 9DBU0231 (1:2). Verify that the target design utilizes LP-HCSL signaling levels and requires zero-delay buffering without internal PLL generation.

Part Context

This part belongs to the Renesas 9DBU series of PCIe clock buffers. It serves as a fanout solution for distributing reference clocks in high-performance computing environments. The device is designed to replace discrete resistor networks by integrating output terminations, thereby reducing board space and component count in PCIe topology designs.

Replacement Considerations

Direct functional substitutes within the same package include the 9DBU0941AKILF. For different output counts, consider the 9DBU0441AKILFT (1:4 ratio) or 9DBU0231AKILFT (1:2 ratio). Note that the 9DBV0941 family offers similar functionality but typically operates at 1.8V.