9DBL0452BKILFT

Overview

The 9DBL0452BKILFT is a 4-output, 3.3V PCIe zero-delay/fanout clock buffer from Renesas Electronics. It supports PCIe Gen 1 through Gen 6 and accommodates both Common and Independent Reference Clock architectures. The device features additive PCIe Gen 6 CC jitter performance of less than 18fs RMS in fanout mode and less than 100fs RMS in high-bandwidth zero-delay buffer (ZDB) mode. It provides four low-power HCSL (LP-HCSL) outputs that eliminate the need for external resistors per output pair, allowing direct connection to 85Ω transmission lines. The component operates within a supply voltage range of 3.135V to 3.465V and functions at temperatures between -40°C and +85°C.

Feature Summary

• Supports PCIe Gen 1 through Gen 6 with additive jitter < 18fs RMS (Fanout) and < 100fs RMS (High-BW ZDB).
• Four LP-HCSL differential outputs enable direct connection to 85Ω transmission lines without series resistors.
• Dedicated OE# pin for each output allows independent control.
• SMBus interface supports configuration with three selectable addresses; operation does not require SMBus.
• Tolerant to spread spectrum input signals.

Applications

• PCI Express (PCIe) Gen 1 to Gen 6 systems.
• Common Reference Clock architectures.
• Independent Reference Clock architectures.

Procurement Notes

Verify the suffix 'B' against official documentation to confirm specific package or temperature grade variations, as standard listings may reference the base model 9DBL0452. Confirm RoHS compliance status and Moisture Sensitivity Level (MSL) ratings prior to procurement. Ensure the ordering part number matches the exact electrical specifications required for the target PCIe generation.

Selection Notes

Select this component when designing for PCIe Gen 6 applications requiring low jitter performance in either fanout or zero-delay buffer modes. The LP-HCSL output signaling simplifies board layout by removing the need for output termination resistors. Verify that the system architecture supports the dedicated OE# pin configuration and that the 3.3V supply rail aligns with the specified operating voltage range of 3.135V to 3.465V.

Part Context

This device belongs to the 9DBL04xx family of PCIe clock buffers. Renesas Electronics' timing product portfolio has been acquired by SiTime. Documentation and sample orders remain available via Renesas.com until the end of 2026, after which full transition to SiTime is expected. New design inquiries should be directed to SiTime resources.

Replacement Considerations

Publicly confirmed substitute part numbers are not provided in the source data. Designers should consult SiTime or Renesas technical support for cross-reference recommendations following the portfolio transition.