ZL40262LDF1

Overview

The ZL40262LDF1 is a two-output ultra-low additive jitter fanout buffer manufactured by Microchip Technology. It accepts one differential input and provides two differential HCSL outputs, supporting clock frequencies from 0 MHz to 400 MHz. The device operates on 2.5V or 3.3V power supplies and features an embedded low-drop-out (LDO) voltage regulator for superior power supply noise rejection. Key electrical specifications include an additive jitter of 32 fs in the 12 kHz to 20 MHz integration band at 400 MHz, a maximum output-to-output skew of 50 ps, and individual output enable pins for each differential pair.

Feature Summary

• Ultra-low additive jitter performance: 32 fs RMS in the 12 kHz to 20 MHz integration band at 400 MHz
• Supports PCIe Gen 1 through Gen 5 and UPI/QPI clock distribution standards
• Embedded LDO voltage regulator enhances power supply noise rejection
• Individual output enable control for each differential output pair

Applications

• PCI Express Generation 1/2/3/4/5 clock distribution
• UPI/QPI clock distribution
• Low jitter clock trees
• Logic translation
• Clock and data signal restoration

Procurement Notes

Verify the specific ordering suffix 'LDF1' against the manufacturer's current product identification system to confirm package type and tape-and-reel configuration. Ensure that the required power supply voltages (2.5V or 3.3V) match the design specifications, as both VDD and VDDO must be connected to the same voltage level during operation.

Selection Notes

Select this component when ultra-low phase noise is critical for high-speed serial interfaces like PCIe Gen 5 or UPI. The device supports input frequencies up to 400 MHz and offers flexible termination options for HCSL outputs. Consider the 4 mm x 4 mm VQFN package dimensions and thermal properties if space constraints are a primary design factor.

Part Context

The ZL40262 belongs to Microchip's family of ultra-low additive jitter fanout buffers designed for high-performance computing and communication applications. It complements other devices in the series by providing a compact solution for distributing reference clocks with minimal added noise, specifically targeting next-generation interface standards requiring stringent jitter budgets.

Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided documentation. Verify compatibility with existing designs by comparing pin configurations, electrical characteristics, and package dimensions before considering alternative components.