9EX21531AKLF

Overview

The Renesas 9EX21531AKLF is a PCI Express (PCIe) fanout buffer and multiplexer IC designed for clock distribution. It features a single circuit with a 2:1 input-to-output ratio, supporting differential inputs and outputs. The device operates at a maximum frequency of 167 MHz and utilizes an internal Phase-Locked Loop (PLL). It requires a supply voltage between 3.135 V and 3.465 V and functions within a commercial temperature range of 0°C to 70°C. The component is housed in a 64-VFQFN package with exposed pad.

Feature Summary

• PCI Express compliant clock distribution buffer
• Integrated PLL for clock generation
• Differential input and output signals
• Maximum operating frequency of 167 MHz

Applications

• PCI Express system clock distribution
• Server and storage backplane timing
• High-speed digital interface synchronization

Procurement Notes

This component is officially listed as End-of-Life (EOL) by the manufacturer. Procurement verification must confirm availability through authorized distributors or secondary market sources. Buyers should verify the specific revision level and packaging type against current inventory records due to the discontinued status.

Selection Notes

Select this part for PCIe applications requiring a 2:1 fanout with integrated PLL capabilities. Ensure the design supports the 3.135 V to 3.465 V supply range and the 64-VFQFN thermal requirements. Verify that the 167 MHz maximum frequency meets the system's clocking needs.

Part Context

The 9EX21531 belongs to the Renesas 9EX series of high-performance clock buffers. This series is specifically engineered for PCI Express and other high-speed serial interface standards, providing signal integrity and jitter attenuation for critical timing nodes in complex electronic systems.

Replacement Considerations

Due to the EOL status, direct substitutes are not explicitly documented in the provided source material. Engineers should consult Renesas technical support for validated replacement components or evaluate alternative PCIe clock generators from the same family if available.