9ZX21901DKLFT

Overview

The Renesas 9ZX21901DKLFT is a differential clock buffer designed for Intel QPI and PCIe platforms. It features one differential HCSL input and nineteen differential HCSL outputs, supporting frequencies up to 400MHz. The device includes an integrated PLL with bypass capability and operates on a 3.135V to 3.465V supply voltage. Packaged in a 72-VFQFPN (10x10mm) exposed pad format, it functions within a 0°C to 70°C temperature range.

Feature Summary

• 1:19 Input-to-Output Ratio
• Integrated PLL with Bypass Mode
• HCSL Differential Signaling
• Supports Frequencies up to 400MHz

Applications

• Intel QPI Clock Distribution
• PCI Express Clock Buffering
• Server Platform Timing

Procurement Notes

Verify the specific suffix 'D' against official documentation to confirm phase jitter specifications and feature set differences compared to other variants in the 9ZX21901 series. Ensure compatibility with the target system's SMBus addressing and power requirements before procurement.

Selection Notes

Select this component when a single differential input must drive nineteen downstream HCSL loads. Confirm that the application requires the specific jitter performance associated with the 'D' variant. Verify board space constraints align with the 10x10mm package dimensions.

Part Context

This part belongs to the 9ZX21901 family of second-generation DB1900Z compliant buffers. It serves as a timing distribution solution for modern Intel server architectures, offering improved jitter performance over previous generations while maintaining backward compatibility.

Replacement Considerations

Check datasheets for 9ZX21901C or 9ZX21901B variants to verify pinout and electrical parameter compatibility. Ensure any substitute maintains the required 1:19 ratio and HCSL output signaling standards.