PI6C20400LEX

Overview

The PI6C20400LEX is a high-speed, low-noise differential clock buffer manufactured by Diodes Incorporated. Designed as a companion to the PI6C410B synthesizer, it distributes a differential SRC clock to four pairs of differential outputs in either PLL or fanout mode. The device operates on a single 3.3V supply (3.135V to 3.465V) and features HCSL inputs and outputs. It supports SMBus control for output enablement and power management, with an operating temperature range of 0°C to 70°C.

Feature Summary

• Four pairs of differential clock outputs with low skew (< 50ps) and jitter (< 50ps)
• Configurable PLL or Fanout operation with programmable bandwidth
• SMBus interface for indexed block read/write and output control
• Tristate control via SRC_STOP# and PWRDWN# pins

Applications

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

Procurement Notes

Verify that the specific order suffix matches the required packaging format. The 'X' suffix indicates Tape/Reel packaging, while other suffixes may denote tube quantities. Confirm the package code L28 corresponds to the 28-pin TSSOP footprint required for the PCB layout. Ensure the ambient temperature requirements align with the 0°C to 70°C commercial grade specification.

Selection Notes

Select this component when a 1:4 differential clock split is required for PCIe applications. It is specifically designed to pair with the PI6C410B clock generator. Consider the SMBus capability if dynamic output control or power-down states are needed during system initialization. Verify that the 3.3V logic levels match the system voltage rails.

Part Context

This part belongs to the PI6C20400 series of clock buffers from Diodes Incorporated. It serves as a downstream driver for clock synthesizers, providing signal integrity through low-noise differential buffering. The device is RoHS compliant and halogen-free, adhering to environmental directives for electronic components.

Replacement Considerations

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