9DBL0252CKILFT

Overview

The 9DBL0252CKILFT is a 2:4 clock mux buffer from Renesas Electronics, designed for PCIe Gen 1–7 applications. It operates at 3.3V and features four LP-HCSL differential outputs with integrated 100Ω terminations. The device supports Common Clocked (CC), Separate Reference Independent Spread (SRIS), and Separate Reference No Spread (SRNS) architectures. It accepts two HCSL inputs and provides selectable asynchronous or glitch-free switching modes. Packaged in a compact 32-VFQFPN format, it maximizes input frequency up to 125 MHz within a -40°C to +85°C operating range.

Feature Summary

• PCIe Gen 1–7 compliant with support for CC, SRIS, and SRNS clocking architectures
• Four LP-HCSL outputs with integrated 100Ω termination resistors
• Selectable asynchronous or glitch-free switching modes
• Spread spectrum tolerant design for EMI reduction

Applications

• Servers and High-Performance Computing systems
• NVMe Storage solutions
• Networking Accelerators
• Industrial Control equipment

Procurement Notes

Verify the RoHS compliance status and Moisture Sensitivity Level (MSL) rating prior to procurement. Confirm that the 32-VFQFPN package dimensions align with the target PCB footprint. Ensure the supply voltage remains strictly within the 3.135 V to 3.465 V range to maintain signal integrity and operational stability.

Selection Notes

Select this component when a single reference clock must be distributed to multiple PCIe endpoints using LP-HCSL signaling. The integrated 100Ω termination eliminates external resistor requirements, reducing board space. Choose the glitch-free switching mode if seamless transitions between input sources are required during operation without introducing timing errors.

Part Context

This part belongs to the 9DBL0442 family of PCIe clock buffers. While the 9DBL0442 typically denotes a 4-output configuration, the 9DBL0252 variant specifically addresses 2-input to 4-output multiplexing needs. It shares the same 3.3V LP-HCSL output signaling and PCIe Gen 1–7 compatibility as its siblings in the series.

Replacement Considerations

Direct substitutes include other 2:4 PCIe clock muxes from Renesas such as the 9DML04 series. Verify that replacement parts support the same LP-HCSL output type and integrated 100Ω termination to ensure pin-to-pin and functional compatibility.