9EX21531AKLFT

Overview

The 9EX21531AKLFT is a PCI Express (PCIe) fanout buffer and multiplexer manufactured by Renesas Electronics Corporation. Designed for high-speed data transmission, this integrated circuit operates with a maximum frequency of 167MHz. It features a 2:15 input-to-output ratio, accepting clock inputs and providing differential HCSL outputs. The device is housed in a 64-VFQFN package with exposed pads, measuring 9x9 mm. It functions within a supply voltage range of 3.135V to 3.465V and supports an operating temperature range of 0°C to 70°C. The component includes an internal Phase-Locked Loop (PLL) for signal integrity.

Feature Summary

• PCI Express Fanout Buffer and Multiplexer
• 2:15 Input to Output Ratio
• Differential HCSL Outputs
• Integrated PLL

Applications

• PCI Express (PCIe) systems
• High-speed server infrastructure
• Data communication equipment

Procurement Notes

This component is officially listed as End-of-Life (EOL). Verification of availability should focus on surplus distributors or alternative packaging options if applicable. Confirm the specific suffix requirements for tape-and-reel versus cut-tape formats when sourcing from secondary markets, as standard manufacturing has ceased.

Selection Notes

Select this part for PCIe applications requiring a 2:15 fanout configuration with differential HCSL outputs. Ensure the design accommodates the 64-VFQFN (9x9mm) footprint and the 3.135V-3.465V power supply constraints. Verify that the 167MHz maximum frequency meets the system's timing requirements.

Part Context

The 9EX21531AKLFT belongs to the 9EX series of clock distribution devices from Renesas. It is specifically engineered for PCI Express environments, offering multiplexing capabilities alongside fanout buffering. This series is distinct from the 9FGP (clock generators) and 9ZXL (zero-delay buffers) families.

Replacement Considerations

As the 9EX21531AKLFT is discontinued, engineers must identify functional equivalents from current Renesas portfolios or other manufacturers. Look for PCIe fanout buffers with matching 2:15 ratios, differential HCSL outputs, and compatible 64-VFQFN packages. Cross-reference pinouts and electrical specifications carefully.