PI6C20400BHE

Overview

The PI6C20400BHE is a PCIe 3.0 compliant high-speed, low-noise differential clock buffer designed as a companion to PCIe 3.0 clock generators. It distributes the differential SRC clock from a generator to four pairs of differential clock outputs in either PLL or bypass mode. The device operates on a single 3.3V supply with a voltage range of 3.135V to 3.465V. In bypass mode, it supports frequencies from 100 MHz to 400 MHz, while the PLL mode is optimized for 100 MHz operation. It features low skew and jitter characteristics suitable for high-speed data transmission applications.

Feature Summary

• PCIe 3.0 Compliant: Designed for PCIe 3.0 clock distribution with backward compatibility for PCIe 1.0 and 2.0 specifications.
• Low Jitter Performance: Achieves less than 1 ps additive RMS phase jitter and cycle-to-cycle jitter under 50 ps.
• Flexible Operation Modes: Supports both Phase-Locked Loop (PLL) mode at 100 MHz and Bypass mode for 100-400 MHz operation.
• SMBus Control: Includes an SMBus interface for programmable output enable, tristate control, and PLL bandwidth selection.

Applications

• PCI Express 3.0 Clock Distribution
• High-Speed Data Transmission Systems
• Server and Storage Motherboards

Procurement Notes

Verify the package type matches the required footprint; the HE suffix indicates a 28-pin wide SSOP package. Confirm that the design utilizes a single 3.3V power supply within the specified 3.135V to 3.465V range. Ensure the PCB layout accommodates the differential output traces and the external resistor connection for IREF to set the output current correctly according to the datasheet recommendations.

Selection Notes

Select this component when a low-jitter, differential clock buffer is needed for PCIe 3.0 architectures requiring up to four output pairs. Choose the HE suffix specifically if the 28-pin wide SSOP package is preferred over the TSSOP option. Consider the SMBus control requirements for dynamic output management and ensure the system can support the necessary external components for the IREF setting and termination resistors.

Part Context

The PI6C20400BHE belongs to the PI6C20400B series of clock buffers manufactured by Diodes Incorporated. This series is part of the company's portfolio of timing solutions tailored for high-speed serial interfaces. The 'E' suffix denotes Pb-free and Green packaging compliance, while 'H' specifies the 28-pin SSOP physical package form factor.

Replacement Considerations

For pin-compatible alternatives within the same family, consider the PI6C20400BLE, which offers the same functionality but in a 28-pin TSSOP package. Verify that any replacement maintains the required 1:4 fanout ratio, differential HCSL/LVDS-like output characteristics, and SMBus control capabilities.