9ZX21901BKLF

Overview

The Renesas 9ZX21901BKLF is a clock buffer IC designed for Intel QPI and PCIe applications. It features a 2:19 input-to-output ratio with differential HCSL signaling on both input and output sides. The device supports a maximum frequency of 400 MHz and operates within a supply voltage range of 3.135 V to 3.465 V. Packaged in a 72-VFQFPN (10x10 mm) exposed pad format, it includes an integrated PLL and functions as a single-circuit timing solution suitable for surface mount installation across a commercial temperature range of 0°C to 70°C.

Feature Summary

• 2:19 Input/Output Ratio: Distributes one differential input to nineteen differential outputs.
• HCSL Signaling: Supports High-Speed Clock Signal Level for both input and output interfaces.
• Integrated PLL: Includes phase-locked loop functionality for clock generation and jitter reduction.
• Compact Packaging: Utilizes a 72-pin VFQFPN package with dimensions of 10x10 mm.

Applications

• Intel QuickPath Interconnect (QPI) clock distribution
• PCI Express (PCIe) system clock buffering
• Server platform timing solutions

Procurement Notes

Verify the specific suffix 'BKLF' against official Renesas documentation to confirm packaging type and moisture sensitivity level. Ensure compatibility with the required operating temperature range of 0°C to 70°C for the target application environment before procurement.

Selection Notes

Select this component when a 2:19 fanout ratio is required for HCSL-based Intel QPI or PCIe architectures. Confirm that the 400 MHz maximum frequency meets the system clock requirements and that the 3.3 V nominal supply voltage aligns with the board design specifications.

Part Context

This part belongs to the 9ZX21901 series of clock buffers manufactured by Renesas Electronics. It is specifically engineered for high-performance computing platforms requiring reliable clock distribution for processor interconnects and expansion slots.

Replacement Considerations

Consult Renesas datasheets for pin-compatible alternatives within the 9ZX21901 family. Verify electrical parameters such as output drive strength and jitter performance when substituting with other variants.