ZL40294LDF6

Overview

The ZL40294 is a 1-to-20 fanout clock buffer compliant with the Intel DB2000QL specification. It provides 20 low-power push-pull HCSL outputs supporting PCIe Gen 5.0 and Gen 6.0 standards. The device operates on a single 3.3V supply and supports input/output frequencies from 0 MHz to 250 MHz. Key electrical characteristics include an ultra-low typical additive jitter of 14 fs within the DB2000QL band, a maximum output-to-output skew of 50 ps, and embedded series termination resistors for 85Ω differential transmission lines. It features an integrated LDO regulator for superior power supply noise rejection.

Feature Summary

• Fully compliant with Intel DB2000QL specification
• 20 Low-Power Push-Pull HCSL outputs with embedded 85Ω termination
• Ultra-low additive jitter: 14 fs typical in DB2000QL band
• Supports PCIe Gen 5.0 and Gen 6.0 specifications

Applications

• PCI Express generation 1/2/3/4/5/6 clock distribution
• Intel QPI
• Servers
• Storage and Data Centers
• Switches and Routers

Procurement Notes

Verify the specific ordering suffix (e.g., LDF6) against the manufacturer's Product Identification System documentation to confirm package type and tape/reel configuration. Ensure compatibility with the required SMBus address selection pins (SA_0, SA_1) during procurement planning.

Selection Notes

Select this component for designs requiring strict adherence to the Intel DB2000QL standard. It is suitable for high-speed clock distribution where ultra-low additive jitter is critical. The device requires a 3.3V supply and supports industrial temperature ranges (-40°C to +85°C). Consider the 80-lead WGQFN package constraints for PCB layout.

Part Context

The ZL40294 belongs to Microchip's ZL40xxx family of clock buffers. It is specifically engineered to meet the rigorous timing and power requirements of modern high-speed serial interfaces like PCIe Gen 5/6. It serves as a replacement for legacy buffers that lack integrated termination or fail to meet the DB2000QL jitter specifications.

Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided datasheet. Verify pin-out and electrical parameters if considering alternative vendors.