PI6C20400HEX

Overview

The PI6C20400HEX is a high-speed, low-noise differential clock buffer manufactured by Diodes Incorporated. Designed as a companion to the PI6C410B synthesizer for Intel PCI Express chipsets, it distributes a differential SRC clock to four pairs of differential outputs. The device supports both PLL and fan-out operations with programmable bandwidth. It operates on a single 3.3V supply (3.135V to 3.465V) within an ambient temperature range of 0°C to 70°C. Key electrical characteristics include output-to-output skew less than 50ps and cycle-to-cycle jitter under 50ps. The component is housed in a 28-pin SSOP package.

Feature Summary

• Four pairs of differential HCSL clock outputs
• Low skew (<50ps) and low jitter (<50ps)
• Programmable PLL bandwidth or fan-out operation
• SMBus interface for output enable and control

Applications

• PCI Express (PCIe) chipset clock distribution
• Intel PCI Express system designs
• High-speed digital signal routing

Procurement Notes

Verify the specific ordering suffix against manufacturer documentation. Suffixes such as 'E' indicate Pb-free and Green status, while 'X' denotes tape and reel packaging. Confirm that the selected variant matches the required surface-mount package type and environmental specifications before procurement.

Selection Notes

Select this component when a 1:4 differential clock distribution solution is required for PCIe applications. Ensure the design accommodates the 3.3V power supply requirements and the 28-SSOP footprint. Verify compatibility with the upstream PI6C410B clock generator if utilizing the recommended companion configuration.

Part Context

The PI6C20400 series belongs to the Pericom/PI6C family of clock drivers. The HEX variant specifically utilizes the 28-pin SSOP package with tape and reel packaging options. This part serves as a critical timing element in multi-lane serial link architectures requiring precise clock synchronization.

Replacement Considerations

Direct replacements must match the 1:4 differential ratio, 28-pin SSOP/TSSOP form factor, and 3.3V operation. Verify pinout compatibility and SMBus address alignment. Cross-reference with other PI6C20400 variants (e.g., LE) for package differences.