9DBU0231AKLFT

Overview

The Renesas Electronics 9DBU0231AKLFT is a zero-delay clock buffer designed for PCI Express (PCIe) Gen1, Gen2, and Gen3 applications. It operates with a single 1.5V supply voltage and features two differential LP-HCSL outputs. The device accepts HCSL-compatible differential inputs and supports spread spectrum input signals. Key electrical parameters include an output frequency range of 1 MHz to 167 MHz and a typical additive phase jitter of 313 fs RMS. It utilizes a 24-pin VFQFPN package measuring 4.0 x 4.0 mm.

Feature Summary

• Zero-delay buffer architecture supporting PCIe Gen1/2/3 standards
• Two differential LP-HCSL outputs reduce power consumption and board space compared to standard HCSL
• Programmable slew rate and output amplitude for tuning across various line lengths and environments
• Pin-selectable PLL bandwidth and bypass modes to minimize phase jitter

Applications

• PCI Express (PCIe) Gen1, Gen2, and Gen3 clock distribution
• High-speed digital system clock buffering
• Server and storage infrastructure timing solutions

Procurement Notes

Verify the suffix 'AKLFT' against official Renesas documentation to confirm specific tape-and-reel packaging and lead-free compliance status. Ensure compatibility with the required 24-pin VFQFPN footprint during procurement planning.

Selection Notes

Select this component when a low-power, zero-delay solution is required for PCIe interfaces. The LP-HCSL outputs are suitable for reducing resistor count and power dissipation. Verify that the input signal matches the HCSL specification and that the operating temperature range meets system requirements.

Part Context

The 9DBU0231 belongs to the IDT/Renesas Ultra-Low-Power (ULP) PCIe family. It is part of a series including variants like the 9DBU0441 (4-output) and 9DBU0631 (1-input/6-output), offering different fan-out configurations while maintaining similar low-power characteristics and PCIe compatibility.

Replacement Considerations

Direct replacements within the same family include the 9DBU0441AKILFT for higher fan-out needs or the 9DBU0631AKILFT for single-input multi-output applications. Cross-family alternatives from other manufacturers require verification of LP-HCSL output compatibility and zero-delay performance metrics.