Board Mechanical Requirements
The following guidelines describes the mechanical requirements for the heatsink on Picolo U4 H.264 PCI-104 RH.
The following drawing shows:
- The outline of the PC-104 module
- The position and the diameter of the 4 holes at the corner of the PCI-104 module
- The position and the diameter of the 4 holes intended for the fixation of the heatsink
- The outline of 4 areas. Each being characterized by a "H.Max" indication.
The H.max indication indicates the maximum component height above the PCB surface for that area. All dimensions are expressed in mm.
The Central Area
The central area is characterized by a H. Max; of 2.2 mm. The area is rectangular; it covers all the main heat contributing components.
It contains four non-plated-through holes having a diameter of 3 mm. Each hole occupies the center of a 5 mm diameter area that contains no components and no PCB traces on the outer layers. The holes are specifically designed for the fixation of a heatsink with push-pins.
The standard heatsink delivered with the Picolo U4 H.264 PCI-104 version of the product, namely, fits entirely in the central area.
The Peripheral Area
The peripheral area is characterized by a H. Max; of 5 mm. This area surrenders the central area.
If a custom-designed heatsink extends over this area it is mandatory that the mounted heatsink leaves at least 5 mm of space above the PCB surface for the components.
The User Connector Area
The user connector area is characterized by a H. Max; of 10 mm. This area covers all the user connectors (video/audio/io).
If a custom-designed heatsink extends over this area it is mandatory that the mounted heatsink leaves at least 10 mm of space above the PCB surface for the connectors. Notice also that the accessibility to the connectors might be impeded!
The PCI-104 Connector Area
The PCI-104 connector area is characterized by a H. Max; of 15.24 mm. This area corresponds to the PCI-104 connector stack..
If a custom-designed heatsink extends over this area it is mandatory that the mounted heatsink leaves at least 15.24 mm of space above the PCB surface for the connector. Notice also that this is possible only for the top module of the system.