PI6C20400ALE

Overview

The PI6C20400ALE is a PCIe 2.0 compliant high-speed, low-noise differential clock buffer manufactured by Diodes Incorporated. It distributes a differential SRC clock from a companion synthesizer to four pairs of differential outputs in a 28-TSSOP package. The device supports both PLL and bypass modes, with a maximum input frequency of 400 MHz and an output frequency limit of 100 MHz in PLL mode. Operating on a 3.3V supply (3.135V–3.465V), it features HCSL inputs/outputs, <50ps skew, and <1ps additive RMS phase jitter. Control is managed via SMBus or dedicated pins like SRC_STOP# and PWRDWN#.

Feature Summary

• PCIe 2.0 compliant 1:4 differential clock buffer with integrated programmable PLL
• Low skew (<50ps) and low cycle-to-cycle jitter (<50ps) for signal integrity
• Supports 100MHz PLL mode and 100-400MHz bypass mode operation
• SMBus interface for indexed block read/write control of outputs and configuration

Applications

• Companion device for Intel PCIe chipsets and PI6C410BS clock synthesizers
• High-speed data acquisition systems requiring precise clock distribution
• Telecommunications equipment utilizing PCIe interfaces

Procurement Notes

Verify the 'LE' suffix indicates the 28-pin TSSOP package variant rather than SSOP. Confirm RoHS compliance status through official documentation as manufacturing processes may change. Ensure the design accommodates the specific 3.3V power supply requirements and thermal characteristics associated with the TSSOP form factor.

Selection Notes

Select this component when a 1:4 fan-out with low-jitter performance is required for PCIe 2.0 applications. The internal PLL allows for jitter filtering, while the bypass mode supports higher frequencies up to 400 MHz. Consider the 28-TSSOP package dimensions if board space is constrained compared to the wider SSOP option.

Part Context

This part belongs to the PI6C20400A series of clock buffers. The 'ALE' suffix specifically denotes the Lead-free and Green 28-pin Thin Shrink Small Outline Package (TSSOP). Other variants include the HE suffix for the Wide SSOP package. The device was originally developed by Pericom Semiconductor before its acquisition by Diodes Incorporated.

Replacement Considerations

The PI6C20400AHE serves as a direct pin-compatible alternative offering the same electrical specifications but housed in a 28-pin Wide SSOP package instead of TSSOP.