There is no forum topic that seem to cover this. Where do I ask a general question about a part in the catalog?
I have a question about the following item:
Digi-Key Part Number:116-1264-ND
Manufacturer: Cinch Connectivity Solutions
Manufacturer Product Number: DCCM21PCBRPN
Description: CONN MICRO-D PLUG 21POS R/A SLDR
I cannot find any documentation on how the two-rows at the connector face map to the 3-rows on the PCB layout. This information does not seem to be in the linked documentation.
@charles.b.naumann
Looking at page labeled 35 in the below link. If you reference the 100 contact callout in the middle.
This would be the same pattern for the the 21 position versions(Plug and Socket).
For the socket
---------1,2,3,4,5,6
-----7,8,9,10,11,12,13
14,15,16,17,18,19,20,21
And reversed for the Plug
---------6,5,4,3,2,1
-----13,12,11,10,9,8,7
21,20,19,18,17,16,15,14
Thank you for your reply. But there is no physical way the connector could be laid out that way. Contacts would be crossing each other at crazy angles.
That is not quite the way the 100 pin is laid out.
100 pin:
1,3,5,7…
2,4,6,8…
27,29,31…
26,28,30…
.
.This 100 pin works out because there are 2 rows on the PCB for every one row on the connector.
.
But there is no way to apply the 100 pin layout to the 21 pin connector. The center row of the PCB footprint HAS to be alternating between the top and bottom row of the connector, but there no obvious single way of doing that.
