9ZX21902AKLFT

Overview

The 9ZX21902AKLFT is a clock buffer and driver integrated circuit manufactured by Renesas Electronics. It supports Intel QPI and PCI Express (PCIe) applications, featuring a 1:21 input-to-output ratio with differential inputs and outputs. The device operates within a supply voltage range of 3.135V to 3.465V and supports maximum frequencies up to 400MHz. It utilizes HCSL output signaling and incorporates an internal PLL. The component is housed in a 72-VFQFPN package with exposed pads, designed for surface-mount installation.

Feature Summary

• Supports high-speed data transmission standards including Intel QPI and PCIe
• Features a single circuit configuration with one differential input and twenty-one differential outputs
• Integrates a phase-locked loop for stable clock generation and distribution

Applications

• Intel QuickPath Interconnect (QPI) clock distribution systems
• PCI Express (PCIe) bus clock buffering and driving
• High-performance server and workstation motherboard designs

Procurement Notes

Verify the specific suffix 'AKLFT' against official Renesas documentation to confirm pinout compatibility and electrical specifications. Ensure that the required operating temperature range and moisture sensitivity level align with the target assembly process. Cross-reference the datasheet revision history to confirm current manufacturing status and any potential design changes affecting integration.

Selection Notes

Select this component when designing systems requiring a single differential clock source to drive multiple PCIe or QPI endpoints. The 1:21 fan-out capability reduces the need for multiple buffer stages. Confirm that the HCSL output swing meets the receiver requirements of the connected devices. Evaluate the thermal performance within the 72-VFQFPN package for the specific PCB layout constraints.

Part Context

This part belongs to the 9ZX21901/9ZX21902 series of Z-Buffers from Renesas. These components are specialized timing solutions designed for complex server architectures. The series provides flexible clock distribution options for high-bandwidth interconnects, ensuring signal integrity across multiple lanes in demanding computing environments.

Replacement Considerations

Check for direct substitutes such as the 9ZX21901CKLFT or 9ZX21901BKLFT if the application requires a different fan-out ratio like 1:19. Verify pin-to-pin compatibility and electrical parameter alignment before swapping. Consult the official cross-reference list for validated alternatives.