9ZX21901CKLFT

Overview

The Renesas Electronics 9ZX21901CKLFT is a PCIe buffer IC designed for Intel QPI and PCI Express platforms. It features a single differential HCSL input driving 19 differential HCSL outputs, providing a 1:19 ratio. The device includes an integrated PLL capable of operating up to 400MHz and supports spread spectrum inputs. It operates within a supply voltage range of 3.135V to 3.465V and functions at temperatures between 0°C and 70°C. The component is housed in a 72-VFQFPN package with dimensions of 10x10mm.

Feature Summary

• 19 differential HCSL outputs driven by a single differential HCSL input
• Integrated PLL supporting frequencies up to 400MHz
• Spread spectrum compatible input signal handling
• Designed specifically for Intel QPI and PCIe architectures

Applications

• Intel QPI clock distribution
• PCI Express (PCIe) clock buffering
• Server platform timing solutions

Procurement Notes

Verify the specific suffix 'CKLFT' against official Renesas documentation to confirm exact temperature grade and packaging specifications. Ensure compatibility with the required 3.135V to 3.465V supply rail during system design validation.

Selection Notes

Select this component when a 1:19 fan-out buffer is required for PCIe or QPI signals. The integrated PLL allows for jitter reduction if the input source requires conditioning. Confirm that the 72-VFQFPN footprint fits the target PCB layout constraints.

Part Context

This part belongs to the 9ZX21901 series of clock buffers from Renesas. It serves as a specialized timing solution for high-speed serial interfaces, ensuring signal integrity across multiple downstream components in server and storage applications.

Replacement Considerations

Check datasheets for backward compatibility with previous generations like the 9ZX21901C. Verify pinout and electrical parameters before substituting with other 19-output PCIe buffers.