PI6C20400LE

Overview

The PI6C20400LE is a high-speed, low-noise differential clock buffer designed as a companion to the PI6C410B for Intel PCI Express chipsets. It distributes a differential SRC clock from the synthesizer to four pairs of differential outputs in either PLL or fanout mode. The device operates on a single 3.3V supply with a voltage range of 3.135V to 3.465V. Key electrical specifications include a maximum propagation delay of 6.5 ns in non-PLL mode and output-to-output skew under 50 ps. It features programmable PLL bandwidth, SMBus control, and power management capabilities.

Feature Summary

• Four pairs of differential HCSL outputs with <50ps skew and jitter
• Programmable PLL bandwidth and selectable PLL/fanout operation
• SMBus interface for indexed block read/write and output control
• Power management via PWRDWN# and SRC_STOP# inputs

Applications

• Intel PCI Express chipset clock distribution
• PCIe 1.0 and 2.0 compliant systems
• High-speed data acquisition timing

Procurement Notes

Verify the ordering suffix 'LE' corresponds to the 28-pin TSSOP package (173-mil wide). Confirm RoHS compliance status through official manufacturer documentation. Ensure the design supports the required 3.3V supply tolerance and SMBus protocol implementation for proper configuration.

Selection Notes

Select this component when a 1:4 differential clock distribution with integrated PLL is required for PCIe applications. Verify that the 28-TSSOP package fits the PCB layout constraints. Check if the specific operating temperature range of 0°C to 70°C meets the system requirements, as industrial grades may require different suffixes.

Part Context

The PI6C20400 series includes variants like the HE (SSOP) and LE (TSSOP). The 'E' suffix indicates Pb-free and Green packaging. This part is specifically optimized for compatibility with the PI6C410B clock synthesizer, forming a complete solution for PCIe reference clock generation and distribution.

Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation.