Compute Module • CM4 connector placement

I am working on a new PCB design in which I need to add two 100 pin connectors for CM4.

I found the following parts from the documentations.

a. 1.5mm with mating connector (clearance under CM4 0mm): DF40C-100DS-0.4v
b. 3.0mm with mating connector (clearance under CM4 1.5mm): DF40HC(3.0)-100DS-0.4v

I would like to use the one with clearance 1.5 mm under CM4, which is DF40HC(3.0)-100DS-0.4v.

I have two questions.

1- The connector DF40HC(3.0)-100DS-0.4v is already mounted on CM4 or this is the connector I need to add in my IO board PCB design ?

2- What is the distance between two connectors ? Is there a land pattern for PCB layout ?

Statistics: Posted by TommyBills — Fri Jun 13, 2025 8:47 am

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