Ecification – Compaq COM Express Extension User Manual

Page 11

3 COM Express™ Module sizes

Specification Rev 013

The PCB size for the nano module is defined as 55mm x 84mm.

The holes shown in this drawing are intended for mounting the module / heat-spreader combination to

the carrier board. An independent, implementation specific set of holes and spacers shall be used to

attach the heat-spreader to the module.

Figure - Small Form Factor nano

All dimensions are shown in millimetres. Tolerances should be ± 0.25mm [±0.010"], unless noted

otherwise. The tolerances on the module connector locating peg holes (dimensions [16.50, 6.00])

should be ± 0.10mm [±0.004"].

The 220 pin connector shall be mounted on the backside of the PCB and is seen “through” the board in

this view. The X mounting holes shown should use 6mm diameter pads and should have 2.7mm plated

holes, for use with 2.5mm hardware. The pads should be tied to the PCB ground plane.

Holes Compatible to COM Express™

ecification

COM Express™ Type 1