9DBU0431AKILF

Overview

The 9DBU0431AKILF is a clock buffer and multiplexer IC from Renesas Electronics, designed for Ethernet and PCI Express (PCIe) applications. It features one input and four outputs with a maximum frequency of 137.5MHz. The device operates on a supply voltage range of 1.7V to 1.9V and supports HCSL signaling for both differential inputs and outputs. Packaged in a 32-VFQFN exposed pad, it functions within an operating temperature range of -40°C to 85°C.

Feature Summary

• Supports PCIe Gen 1-3 and Ethernet clocking architectures
• Integrated multiplexer functionality with selectable switching modes
• HCSL differential input/output signaling for low noise performance
• Operates at frequencies up to 137.5MHz with 1:4 output ratio

Applications

• PCI Express (PCIe) Gen 1/2/3 system clock distribution
• Ethernet controller clock generation and buffering
• High-speed digital interface timing synchronization

Procurement Notes

Verify the specific suffix 'ILF' against official Renesas documentation to confirm package type and tape/reel specifications. Ensure compatibility with existing PCB footprints for the 32-VFQFN package. Check for any product change notifications (PCNs) related to manufacturing sites or materials that may affect long-term availability or assembly processes.

Selection Notes

Select this component when a low-power, high-performance clock buffer with multiplexing capability is required for PCIe or Ethernet designs. The 1.7V-1.9V supply voltage makes it suitable for modern low-voltage logic families. Consider the 137.5MHz maximum frequency limit when designing for higher-speed interfaces or future-proofing requirements.

Part Context

This part belongs to Renesas' 9DBU series of PCIe clock buffers and muxes. It complements other devices like the 9DBU0441 and 9DMV0441 by offering specific HCSL I/O characteristics and a 32-pin QFN form factor. It is distinct from the 9FGV series which are clock generators rather than buffers/muxes.

Replacement Considerations

Direct substitutes include the 9DBU0431BKLF if pinout and electrical parameters match exactly. Verify functional equivalence with the 9DBU0441AKILF, noting potential differences in output drive strength or internal termination options.