9ZXL0831AKLFT

Overview

The 9ZXL0831AKLFT is an 8-output low-power differential clock buffer manufactured by Renesas Electronics. It complies with the Intel DB800ZL specification, supporting PCIe Gen 1/2/3 and QPI/UPI applications. The device features LP-HCSL outputs and accepts HCSL inputs within a frequency range of 33 MHz to 150 MHz. It operates on a single 3.3 V supply (3.135 V to 3.465 V) and consumes typical power of 445 mW. Key electrical parameters include cycle-to-cycle jitter under 50 ps, output-to-output skew under 65 ps, and input-to-output delay variation under 50 ps. It utilizes a 48-pin VFQFPN package.

Feature Summary

• Intel DB800ZL compliant 8-output differential buffer for PCIe and QPI/UPI
• Fixed external feedback path enabling 0 ps input-to-output delay
• Low-power push-pull LP-HCSL outputs eliminating external series termination resistors
• Selectable PLL bandwidth to minimize jitter peaking in downstream PLLs

Applications

• PCI Express Gen 1, Gen 2, and Gen 3 systems
• Intel QuickPath Interconnect (QPI) and Ultra Path Interconnect (UPI)
• Server and high-performance computing platforms
• NVMe storage controllers and networking accelerators

Procurement Notes

Verify the suffix 'T' indicates tape-and-reel packaging versus the 'LF' tray variant. Confirm RoHS compliance status via the official datasheet. Check for Product Change Notifications regarding assembly site or labeling updates. Ensure moisture sensitivity level (MSL 3) handling requirements are met during assembly.

Selection Notes

Select this component when strict adherence to the Intel DB800ZL specification is required for legacy PCIe or QPI designs. The fixed feedback architecture suits applications needing minimal drift. Compare against the 9ZXL0831E for enhanced jitter performance if higher frequencies up to 400 MHz are needed. Ensure the 48-VFQFPN footprint fits the board layout constraints.

Part Context

This part belongs to the 9ZXL0831 family of zero-delay fanout buffers. It serves as a pin-compatible predecessor to the 9ZXL0831E, which offers improved phase jitter performance. The AKLF/T designation specifies the commercial temperature range and specific packaging format within the broader Renesas clock buffer portfolio.

Replacement Considerations

The 9ZXL0831E is a direct pin-compatible upgrade offering improved phase jitter performance. The 9ZXL0832EKILF is another derivative within the same package family. Verify that the enhanced specifications of the E-series do not introduce compatibility issues with existing system timing budgets.