HUDL is using the following connector to mount our Jetson Xavier NX module (on the Flex camera) to their host system:
TE Connector spec: 2309413-1
TE’s specification calls out that the card slot center is 7.30+0.25/-0 mm from the surface of the host PCB ie see Section A-A as follows:
Section A-A Page 1 of spec
Center of Card slot to Top surface of mounting PCB: 7.3 +0.25/-00 (7.35 – 7.
The NVIDIA specification for board thickness is 1.2+/-0.12mm. As per Page 43 of Jetson_Xavier_NX_Product_Design_Guide_DG-09693-001_v1.7.pdf
So using TE Connectivity’s connector solution, we have:
Max distance of NVIDIA module to PCB separation:
7.55 – (1.2-0.12)/2 = 7.01mm
Min distance of NVIDIA module to PCB separation:
7.35 – (1.2+0.12)/2 = 6.69mm
Hence distance tolerance can be expressed as:
6.85 +/-0.16 mm
The NVIDIA module spec calls out 6.57±/0.1mm spacer for a 9.2mm height connector. TE Connectivity calls out the connector we use as a 9.3mm height. As per Page 9 of
Jetson_Xavier_NX_Product_Design_Guide_DG-09693-001_v1.7.pdf
Hence, I have the following question: Does NVIDIA see any concern in this arrangement with using a 6.5 +/-0.1 spacer? This solution represents the most easily sourced/manufactured outcome. Other solutions which land the spacing in the middle of the tolerance range either require a custom part or an extra part ie washer which is difficult to assemble. So hoping you have a view regarding the use of a 6.5mm spacer only.