9DBU0231AKILFT

Overview

The Renesas Electronics 9DBU0231AKILFT is a zero-delay clock buffer designed for PCIe Gen1-Gen3 applications. It operates with a single 1.5V supply and features two differential LP-HCSL outputs. The device accepts HCSL-compatible differential inputs and supports spread spectrum input frequencies up to 167 MHz. Typical power consumption in PLL mode is 35 mW. It utilizes a 24-pin VFQFPN package (4x4 mm) for space-constrained designs. Key electrical parameters include a core voltage of 1.5V, output frequency range of 1-167 MHz, and typical additive phase jitter of 313 fs RMS.

Feature Summary

• Zero-delay buffer architecture with 1 differential HCSL input and 2 differential LP-HCSL outputs
• Ultra-low power consumption: 35 mW typical in PLL mode
• Programmable slew rate and output amplitude for line length and environment tuning
• SMBus interface or strapping pins for configuration; outputs blocked until PLL lock

Applications

• PCI Express Gen1, Gen2, and Gen3 clock distribution
• High-speed digital system clock buffering
• Space-constrained embedded designs requiring low-power clock management

Procurement Notes

Verify the specific suffix 'AKILFT' against the manufacturer's current datasheet to confirm package type, tape-and-reel quantity, and RoHS compliance status. Ensure the ordering quantity aligns with the standard factory pack size of 2500 units if full reels are required. Check for any recent Product Change Notifications (PCNs) that may affect material composition or manufacturing location.

Selection Notes

Select this component when a zero-delay buffer with low power consumption is required for PCIe interfaces. The 1.5V supply voltage distinguishes it from 3.3V family members. Verify that the input clock source matches the HCSL specification and that the load requirements align with the programmable LP-HCSL output capabilities. Consider the 24-pin VFQFPN footprint for PCB layout constraints.

Part Context

The 9DBU0231 belongs to Renesas' Ultra-Low-Power (ULP) PCIe clock family. It is functionally similar to other devices in the 9DBU series but specific to 2-output configurations. It complements clock generators like the 9FGV0231 by providing buffered, zero-latency distribution rather than frequency synthesis.

Replacement Considerations

Direct pin-to-pin replacements within the same family include the 9DBU0441AKILFT (4-output) or 9DBU0631AKILFT (6-output), provided the additional outputs are acceptable. For different output counts, verify signal integrity and power budget changes.