PI6C20400SHE

Overview

The PI6C20400SHE is a PCIe-compatible high-speed, low-noise differential clock buffer manufactured by Diodes Incorporated. Designed for PCI Express applications, it features a 1:4 fan-out ratio with differential input and output signals. The device operates within a supply voltage range of 3.135V to 3.465V and supports maximum frequencies up to 100MHz. It integrates an internal PLL and accepts LVTTL inputs. Packaged in a 28-SSOP surface-mount case, it functions reliably across an operating temperature range of 0°C to 70°C.

Feature Summary

• PCIe 3.0 compatible with backward compatibility for PCIe 1.0 and 2.0 specifications
• 1:4 differential clock fan-out buffer with integrated PLL
• Low-noise design optimized for high-speed signal integrity
• Controlled via SRC_STOP#, PWRDWN#, SMBus, SCLK, and SDA inputs

Applications

• PCI Express 3.0 system designs
• Clock distribution for PCIe root complexes or switches
• Server and workstation motherboard timing circuits

Procurement Notes

Verify the specific ordering suffix 'SHE' against official Diodes Incorporated documentation to confirm package dimensions and tape/reel specifications. Ensure the component meets the required RoHS compliance standards for the target assembly process. Cross-reference the 28-SSOP footprint with PCB layout guidelines to guarantee mechanical fit and thermal performance during installation.

Selection Notes

Select this component when a differential 1:4 clock distribution solution is required for PCIe architectures. Confirm that the system power supply aligns with the 3.135V to 3.465V operating range. Verify that the LVTTL input logic levels are compatible with the upstream clock generator. Consider the 0°C to 70°C industrial temperature range suitability for the intended environment.

Part Context

This part belongs to the PI6C20400 series of PCIe clock buffers. It serves as a companion to PCIe clock generators, distributing the source reference clock to multiple downstream components. The series is designed to reduce board space and simplify layout by integrating buffering and termination capabilities within a compact SSOP package.

Replacement Considerations

Check for direct pin-to-pin replacements within the PI6C20400 family, such as variants with different suffixes indicating package or temperature changes. Verify electrical compatibility if substituting with other PCIe clock buffers from Diodes Incorporated or competitors.