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1:4 Clock Driver for Intel PCIe® 3.0 Chipsets

NOTE: Datasheet may not yet reflect updated package obsolescence/phase out status or Package Drawing. Please refer to the PRODUCT OPTIONS tab for the most up to date package options and drawings. Please refer to PCN/PDN tabs for most current package obsolescence/phase out status.
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Product Description

The PI6C20400B is a PCIe 3.0 compliant high-speed, low-noise differential clock buffer designed to be companion to PCIe 3.0 clock generator. It is backward compatible with PCIe 1.0 and 2.0 specification. 
The device distributes the differential SRC clock from PCIe 3.0 clock generator to four differential pairs of clock outputs either with or without PLL. The clock outputs are controlled by input selection of SRC_STOP#, PWRDWN# and SMBus, SCLK and SDA. When input of either SRC_STOP# or PWRDWN# is low, the output clocks are Tristated. When PWRDWN# is low, the SDA and SCLK inputs must be Tri-stated.


  • Phase jitter filter for PCIe 3.0 application
  • Four Pairs of Differential Clocks
  • Low skew < 50ps
  • Low jitter < 50ps cycle-to-cycle
  • < 1 ps additive RMS phase jitter
  • Output Enable for all outputs
  • Outputs tristate control via SMBus
  • Programmable PLL Bandwidth
  • 100 MHz PLL Mode operation
  • 100 - 400 MHz Bypass Mode operation
  • 3.3V Operation
  • Packaging (Pb-free and Green):
    -28-Pin SSOP (H28)
    -28-Pin TSSOP (L28)

Product Specifications

Product Parameters

Compliance(Only Automotive supports PPAP) Standard
Function PCIe clock buffer
Input Type(s) HCSL
Jitter RMS (ps) 50
Number of Outputs 4
Output Frequency (MHz) 100
Output Type(s) HCSL
Skew (PS) 50
Supply Voltage (V) 3.3
Ambient or Junction Temperature (°C) -40 to 85

Technical Documents

Recommended Soldering Techniques


Orderable Part Number Status Package Environmental Compliance Packing Buy from Distributor /
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Request Samples
Qty. Carrier
PI6C20400BHE Obsolete SSOP-28 LFGP 47 TUBE
PI6C20400BHEX Active SSOP-28 TPGP 2000 T&R Contact Sales Request Sample
PI6C20400BLE Not Recommended for New Design (NRND) TSSOP-28 TPGP 50 TUBE Contact Sales
PI6C20400BLEX Active TSSOP-28 TPGP 3000 T&R


Authorized Distributor Quantity Inventory Date Countries/Regions Buy Online
Digi-Key Electronics 2074 12/5/2022 Europe, Asia, North America Buy Now
Mouser Electronics Inc. 20637 12/5/2022 South America, North America, Asia, Europe, Middle East Buy Now
Request Sample

Environmental Compliance Legend:
LFF: Pb-Free Finish and RoHS 5/6
TLFP: Totally Pb-Free Product and RoHS 6/6
LFGP: Pb-free Finish and Green Product, RoHS 5/6 and Halogen Free
TPGP: Totally Pb-Free and Green Product, RoHS 6/6 and Halogen Free
GREEN: Halogen-free and RoHS compliant
RoHS: RoHS compliant but NOT halogen-free

Product Change Notices (PCNs)

A PCN may only apply to specific orderable part numbers in this datasheet. Please refer to the corresponding PCN to see the exact orderable part number(s) affected.

PCN # Issue Date Implementation Date Subject
PCN-2487 2020-10-07 2021-01-07 Fab Porting from Global Foundries to Magnachip, Assembly & Test Site Transfer, and Datasheet Change
PCN-2481 2020-08-26 2021-02-26 Device End of Life (EOL)
PCN-2325 – Rev 3 (Interim Update) 2018-04-20 2020-11-20 Fab Porting from Global Foundries to MagnaChip