beaglebone-black - Flipbook - Page 92
BeagleBone Black
The G in the part number is a plating option. Other options may be used as well as long as the contact area is
gold. Other possible sources are Sullins and Samtec for these connectors. You will need to ensure the depth
into the connector is su昀케cient
8.2.4 Main Expansion Headers-Stacking
For stacking con昀椀guration, the two 46 pin expansion headers use the same connectors. Figure 66 is a picture
of the connector. These are dual row 23 position 2.54mm x 2.54mm connectors.
Fig. 8.6: Expansion Connector
The connector is mounted on the top side of the board with longer tails to allow insertion into the BeagleBone
Black. Figure 67 is the connector con昀椀guration for the connector.
Fig. 8.7: Stacked Cape Expansion Connector
For convenience listed in Table 18 are some possible choices for part numbers on this connector. They have
varying pin lengths and some may be more suitable than others for your use. It should be noted, that the longer
the pin and the further it is inserted into the BeagleBone Black connector, the harder it will be to remove due
to the tension on 92 pins. This can be minimized by using shorter pins. There are most likely other suppliers
out there that will work for this connector as well. If anyone 昀椀nds other suppliers of compatible connectors
that work, let us know and they will be added to this document. The 昀椀rst item in**Table 19** is on the edge
and may not be the best solution. Overhang is the amount of the pin that goes past the contact point of the
connector on the BeagleBone Black.
The third part listed in Table 20 will have insertion force issues.
Table 8.7: Stacked Cape Connectors
SUPPLIER
PARTNUMBER
TAIL LENGTH(in)
OVERHANG(in)
Major League
Major League
Major League
SSHQ-123-D-06-G-LF
SSHQ-123-D-08-G-LF
SSHQ-123-D-10-G-LF
.190
.390
.560
0.049
0.249
0.419
There are also di昀昀erent plating options on each of the connectors above. Gold plating on the contacts is the
minimum requirement. If you choose to use a di昀昀erent part number for plating or availability purposes, make
sure you do not select the “LT” option.
Other possible sources are Sullins and Samtec but make sure you select one that has the correct mating depth.
8.2.5 StackedStealing
Figure 68 is the connector con昀椀guration for stackable capes that does not provide all of the signals upwards
for use by other boards. This is useful if there is an expectation that other boards could interfere with the
8.2. Pin Usage Consideration
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