9ZXL0831EKILFT

Overview

The 9ZXL0831EKILFT is a second-generation enhanced performance DB800ZL differential clock buffer manufactured by Renesas Electronics. It serves as a pin-compatible upgrade to the 9ZXL0831A, offering improved phase jitter performance for critical QPI/UPI applications. The device features one differential HCSL input and eight differential LP-HCSL outputs, supporting frequencies up to 400 MHz. It operates on a single 3.3V supply (3.135V to 3.465V) within an industrial temperature range of -40°C to +85°C. Packaged in a compact 48-VFQFPN (6mm x 6mm) with exposed pad, it integrates selectable PLL bandwidth and spread spectrum compatibility to minimize jitter peaking and reduce EMI.

Feature Summary

• Zero-delay buffer architecture with fixed external feedback maintaining low drift for QPI/UPI applications
• Eight LP-HCSL outputs eliminating 16 series resistors and saving approximately 27mm² of board area
• Selectable PLL bandwidth and hardware/SMBus control for mode changes without power cycling
• Spread spectrum compatible operation tracking input clock spreading for EMI reduction

Applications

• Servers and high-performance computing systems
• NVMe storage controllers
• Networking accelerators
• Industrial control systems

Procurement Notes

Verify the suffix EKILFT corresponds to the tape-and-reel packaging configuration. Confirm that the specific revision matches the second-generation DB800ZL derivative requirements. Ensure the design accommodates the 48-VFQFPN package thermal pad connection for proper heat dissipation during operation at maximum frequency.

Selection Notes

Select this component when upgrading from the 9ZXL0831A to benefit from reduced phase jitter while maintaining pin compatibility. Choose this part for designs requiring independent hardware control of each output via dedicated OE# pins. Verify that the input clock source supports the required HCSL signaling format and that the system can accommodate the 3.3V supply voltage constraints.

Part Context

This part belongs to the 9ZXL08x1E family of zero-delay/fanout clock buffers designed for PCIe Gen 1–5 compliance. It is functionally related to the 9ZXL0851E but offers distinct performance characteristics optimized for legacy QPI and UPI protocols alongside modern PCIe standards.

Replacement Considerations

The 9ZXL0831A is the direct predecessor, offering pin-to-pin compatibility with lower performance metrics. The 9ZXL0851E provides an alternative within the same package footprint. No other cross-model substitutes are confirmed in public documentation.