PI6C20400AHE

Overview

The PI6C20400AHE is a PCIe 2.0 compliant high-speed, low-noise differential clock buffer manufactured by Diodes Incorporated. It distributes a single differential SRC clock input to four pairs of differential HCSL outputs in a 1:4 ratio. The device supports both PLL and bypass modes, operating at frequencies up to 400 MHz in bypass mode and 100 MHz in PLL mode. It features low skew (<50ps) and cycle-to-cycle jitter (<50ps). Powered by a 3.135V to 3.465V supply, it is housed in a 28-pin SSOP package.

Feature Summary

• PCIe 2.0 compliant with phase jitter filter capabilities
• Four pairs of differential HCSL outputs with <50ps skew and jitter
• Programmable PLL bandwidth and output enable control via SMBus
• Tristate output control via SRC_STOP# and PWRDWN# inputs

Applications

• Companion buffer for PI6C410BS clock synthesizer
• Intel PCIe chipset clock distribution
• High-speed data acquisition systems requiring low-jitter clocks

Procurement Notes

Verify the specific ordering suffix against the manufacturer's official documentation. The 'H' suffix indicates a 28-pin wide SSOP package, while 'E' denotes lead-free and green status. Confirm that the required quantity matches the standard tube packaging specifications provided by the supplier.

Selection Notes

Select this component when a 1:4 fanout buffer with integrated jitter filtering is required for PCIe 2.0 applications. Ensure the design accommodates the 3.3V supply voltage range and utilizes the SMBus interface if dynamic configuration of output states or PLL bandwidth is necessary.

Part Context

This part belongs to the PI6C20400A series of clock drivers designed specifically for PCI Express architectures. It serves as a slave device controlled by an upstream clock generator, providing conditioned clock signals to multiple downstream receivers while maintaining signal integrity through low-skew distribution.

Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided documentation. Verify pin compatibility and electrical parameters before considering alternative devices from other manufacturers.