PI6C20800VEX

Overview

The PI6C20800VEX is a high-speed, low-noise differential clock buffer designed for Intel PCI Express chipsets. It distributes the differential SRC clock from the PI6C410B synthesizer to eight differential pairs of outputs with or without PLL support. The device operates on a 3.3V supply (3.135V to 3.465V) and supports frequencies up to 400MHz in bypass mode. It features low skew (<50ps) and cycle-to-cycle jitter (<50ps). The component is housed in a 48-pin SSOP package.

Feature Summary

• Eight pairs of differential HCSL clock outputs
• Programmable PLL bandwidth and fanout/PLL operation selection
• SMBus interface for output enable, tristate control, and power management
• Low skew (<50ps) and low cycle-to-cycle jitter (<50ps)

Applications

• Intel PCI Express chipset clock distribution
• High-speed data acquisition systems
• Telecommunications equipment

Procurement Notes

Verify the specific suffix 'VEX' against official documentation. The datasheet lists 'VE' as the standard 48-pin SSOP part number and notes that adding an 'X' suffix indicates Tape/Reel packaging. Confirm if the local source material's 'VEX' designation aligns with this manufacturer convention for reel packaging.

Selection Notes

Select this component when a 1:8 differential clock distribution solution with integrated PLL capabilities is required for PCIe applications. Ensure the design accommodates the 48-SSOP package dimensions and the 3.3V operating voltage range. Verify compatibility with the SMBus control protocol for system integration.

Part Context

This component belongs to the PI6C20800 series of clock buffers. The 'V' suffix denotes the 48-pin SSOP package variant, while the 'E' suffix typically indicates Pb-Free and Green manufacturing compliance. The 'X' suffix generally specifies tape and reel packaging for automated assembly.

Replacement Considerations

The PI6C20800VE is the tube-packaged equivalent of this component. Other variants include the PI6C20800AE (TSSOP package) and the PI6C20800AEX (TSSOP tape/reel). Ensure pinout and electrical characteristics match before substitution.

FAQ

What is the maximum input frequency supported by the PI6C20800?

The device supports a maximum input frequency of 400 MHz in bypass mode.

How is the output state controlled?

Outputs can be enabled or tristated via individual OE pins, the SMBus interface, or control signals like SRC_STOP# and PWRDWN#.

What is the typical skew performance?

The output-to-output skew is less than 50 ps.