9DBU0441AKILFT

Overview

The 9DBU0441AKILFT is a 4-output, 1.5V PCIe zero-delay/fanout clock buffer manufactured by Renesas Electronics Corporation. It features integrated output terminations providing ZO=100 ohms for direct connection to 100 ohm transmission lines, eliminating the need for external resistors. The device supports LP-HCSL output signaling with a frequency range of 1 MHz to 167 MHz and accepts spread spectrum input. It operates on a single 1.5V supply with typical power consumption of 45 mW in PLL mode. The component is housed in a space-saving 32-pin VFQFPN package (5.0 x 5.0 mm) and includes an SMBus interface for configuration.

Feature Summary

• Integrated 100-ohm output termination for direct connection to transmission lines
• Low power consumption: 45 mW typical in PLL mode
• Programmable slew rate and output amplitude for line length tuning
• SMBus interface with selectable addresses for system control

Applications

• PCIe Gen1/Gen2/Gen3 clock distribution
• Zero-delay fanout buffering for high-speed interfaces
• EMI reduction via spread spectrum compatibility

Procurement Notes

Verify RoHS compliance status and moisture sensitivity level (MSL 1) before procurement. Confirm package dimensions (32-VFQFPN, 5x5mm) match PCB footprint requirements. Check for end-of-life notifications or alternative part recommendations from the manufacturer due to potential obsolescence risks associated with older PCIe generation components.

Selection Notes

Select this component when a low-power, 1.5V PCIe clock buffer with integrated 100-ohm termination is required. Ensure the design supports LP-HCSL signaling and utilizes an SMBus controller for configuration if programmable features are needed. Verify that the operating temperature range meets system specifications.

Part Context

This part belongs to Renesas' ultra-low-power (ULP) PCIe family, designed specifically for 1.5V applications. It serves as a successor or alternative to higher voltage PCIe clocking solutions, offering reduced board space and power consumption compared to standard HCSL buffers requiring external termination resistors.

Replacement Considerations

The 9DBL411AKLFT is listed as a manufacturer-recommended replacement. However, it operates at 3.3V, not 1.5V, and uses a 20-pin package instead of 32-pin. Verify voltage compatibility and pin-out differences before substitution.