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Advantech SOM-Express Design Guide
7.2 SOM Express Module Connector
The module connector for Pin-out Type 2 shall be a 440-pin receptacle that is
composed of 2 pieces of a 220-pin, 0.5 mm pitch receptacle. The pair of connectors
may be held together by a plastic carrier during assembly to allow handling by
automated assembly equipment. The connectors shall be qualified for LVDS
operation up to 6.25GHz, to support PCI Express Generation 2 signaling speeds.
Sources for the individual 220-piin receptacle are AMP / Tyco 3-1318490-6 0.5mm
pitch Free Height 220 pin 4H Receptacle, or equivalent AMP / Tyco 8-1318490-6
0.5mm pitch Free Height 220 pin 4H Receptacle, or equivalent (same as previous
part, but with anti-wicking solution applied). A source for the combined 440-pin
receptacle (composed of 2 pieces of the 220 pin receptacle held by a carrier) is: AMP
/ Tyco 3-1827231-6 with 0.5mm pitch Free Height 440 pin 4H Receptacle or
equivalent.
Note: the part number above shown with a leading '8' has an anti-wicking solution
applied that may help in processing with an aggressive flux. The other versions of the
parts may also be made available with this solution by the vendor. The module
connector is a receptacle by virtue of the vendor's technical definition of a receptacle,
and to some users it looks like a plug.
Figure 7-2: SOM-Express Module Receptacle
7.3 SOM Express Carrier Board Connector
The Carrier Board connector for module Pin-out Type 2 shall be a 440-pin plug that is
composed of 2 pieces of a 220-pin, 0.5 mm pitch plug. The pair of connectors may
be held together by a plastic carrier during assembly to allow handling by automated
assembly equipment. The connectors shall be qualified for LVDS operation up to
6.25GHz, to support PCI Express Generation 2 signaling speeds. The Carrier Board
plugs are available in a variety of heights. The Carrier Board shall use either the 5
mm or 8 mm heights.
A source for the individual 5mm stack height 220-piin plug is AMP / Tyco 3-1327253-
6 0.5mm pitch Free Height 220 pin 5H Plug, or equivalent
A source for the combined 5mm stack height 440-pin plug ( composed of 2 pieces of
the 220 pin plug held by a carrier ) is: AMP / Tyco 3-1827233-6 0.5mm pitch Free
Height 440 pin 5H Plug, or equivalent
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Chapter 7 Carrier Board Mechanical Design
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