Specifications

PCIe/104 and PCI/104-Express Specification Revision 3.0 February 17, 2015 Page 55
6.3.3 Connector A Placement Details
Since the QFS (ASP-129646-03) connector is larger than the QMS (ASP-129637-03), the QFS was used to determine the
placement of both the QFS and the QMS. The maximum width of the QFS is determined by the recommend solder pad size
and placement which is larger than the outer plastic dimensions of the QFS connector. The connector was lined up so that
the base of the bottom solder pad lined up with the bottom of the AT ISA connector found on the PC/104 and PC/104-Plus
form factors. This allows the retention of the traditional keep out region. With this placement the centerline of the connector
(which placement should be based on) is located at 0.290 inches (7.37 mm) from the edge of the board.
The horizontal positioning of the QFS connector was calculated by positioning it in the center of the PCB and rounding off to
a reasonable even multiple of 0.025 inches (0.635 mm) since this is the distance between two solder pads. The result was the
first solder pad being located 0.625 inches (15.875 mm) from the left edge of the PCB as shown in Figure 6-17.
With the placement of the bottom side QFS connector, the QMS connector placement points are determined. The vertical
placement point for the QMS is the same as that for the QFS which is 0.290 inches (7.37 mm) from the edge of the PCB to
the center planes of the connector.
--
0.625 (15.88)
0.000 (0.00)
0.200 (5.08)
0.365 (9.27)
0.290 (7.37)
0.570 (14.48)
0.000 (0.00) 0.200 (5.08)
Connector A: ASP-129637-03
Top View of Module
0.450 (11.43)
1
2
0.130 (3.30)
0.5325 (13.53)
0.000 (0.00)
0.200
(
5.08
)
0.290 (7.37)
Connector A: ASP-129646-03
Bottom View of Module
0.460 (11.68)
0.120 (3.05)
0.210 (5.33)
2
1
Figure 6-17: Top Side and Bottom Side Views of Connector Placements
Dimensions are in inches / [millimeters]