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9 Threads found on Smd Footprints
We rarely use thermal relief on smd assemblies, especially when SMPS's are involved or high power. As Klaus has said its all down to correct pre-heating, gently raising the whole assembly to the correct temperature, no thermal shocks.... If it is done correctly you will have no problems. Its like tomb stoning of chip components, if it happens you h
As most modern day smd footprints are hard metric and as mm is a standard unit why not work in metric, its a lot better. For inner layers a conventionally drilled via is used or stacked microvias, read this:
I have bought several OPTEK OPIA412ATU optocouplers, from the OPIA400 range. The datasheet doesn't give much in the way of soldering footprints, just that this type is "Package Style A", which may be an internal OPTEK name. The dimensions are given
Clearly yes. There are detailed IPC specifications for footprints, you can also refer to manufacturer footprint suggestions. The most important point is to understand the limitations of smd wave soldering. A lot of modern components (fine pitch, "quad" pin arrangement) can't be wave soldered. In my view, the technique is almost legacy today. So
im using altium designer 10 for creating my PCB. now i want to create a smd board but my altium library doesn't have 805 component library.where can i download it?
I doubt you will get each and every component footprint for free you can ask some vendor who can make all the smd footprint for you or you have to create it by yourself Standard packages are alsways available you can get them by searching on internet.
1) you need to connect using off page connectors to connect the nets. 2) you need to go through the IPC7351 smd footprint standards to understand the different footprints.
Hi I am doing projects and products mainly using MCU . Presently I am using Orcad for My PCB purposes. I am doing circuits normally with say fits in range of 15Cm*10cm. ~! The components are DIP or smd .Never BGA or any such complicated footprints. So far I have not done any circuit simulation . I wish to learn a simulation tool
PCAD 2002 smd Components Libs