9DB433AFLF

Overview

The Renesas Electronics 9DB433AFLF is a four-output PCIe Gen3 zero-delay buffer and fanout clock distribution IC. It operates within a supply voltage range of 3.135 V to 3.465 V and supports maximum input frequencies up to 166 MHz. The device features differential HCSL signaling for both inputs and outputs, with a typical power consumption of 317 mW. Packaged in an SSOP-28 format (10.2 x 5.3 x 1.73 mm), it functions across an industrial temperature range of -40°C to +85°C. Key electrical parameters include phase jitter performance below 1 ps rms for PCIe Gen3 applications.

Feature Summary

• Four differential HCSL output pairs supporting PCIe Gen3, Gen2, and Gen1 standards
• Zero-delay buffer mode with bandwidth programming available from 33MHz to 110MHz in PLL mode
• Low phase jitter: <1ps rms for PCIe Gen3, <3.1ps rms for Gen2, and <86ps peak-to-peak for Gen1
• Accepts spread spectrum input signals for EMI reduction

Applications

• PCI Express (PCIe) Gen3 clock distribution networks
• Backward compatible PCIe Gen2 and Gen1 system designs
• High-performance computing platforms requiring low-jitter clocking
• Server and storage infrastructure clock buffering

Procurement Notes

Verify the specific package variant when ordering, as the base part number 9DB433 corresponds to multiple packages including SSOP-28 and TSSOP-28. Confirm that the 'AF' suffix denotes the SSOP-28 package type with the specified dimensions. Check current RoHS compliance status and moisture sensitivity level (MSL 1) against project requirements before finalizing procurement.

Selection Notes

Select this component when a four-channel differential clock buffer is required for PCIe Gen3 interfaces. Ensure the design accommodates the 3.3V nominal supply voltage (3.135V–3.465V range). Consider the SSOP-28 footprint constraints during PCB layout. Verify that the input source provides a differential HCSL signal pair compatible with the device's input specifications.

Part Context

The 9DB433AFLF belongs to the 9DB433 family of zero-delay buffers designed primarily for PCI Express applications. It serves as a downstream buffer driven by main clock generators such as the 932S421 or 932SQ420. The device ensures signal integrity and timing alignment for multiple PCIe endpoints while maintaining backward compatibility with older generation standards.

Replacement Considerations

Publicly confirmed substitute part numbers are not provided in the verified source material.