Mark,

Try an inquiry to the manufacturer.  In most cases they have a suggested land pattern to use for the
product on the specification sheet.

Lisa Anderson
Paradyne Corp
Largo FL

Mark Ross wrote:

> We just bought the land pattern standard, IPC-SM-782 and found that many
> of the components we are planning to design are not in here and appear
> (?) to be unregistered.
>
> For instance SOT23-5 is not in the book.  Can anyone recommend a good
> source for ALL or most land patterns.  A source that has a proven land
> pattern track record?
>
> I do not want to use the IPC calculator and waste my time on many
> patterns.  I would like a good resource for this information.  Or does
> one not exist yet?
>
> Do I understand the process correctly that first a component must be
> registered with JEDEC and then at some point somehow an IPC land pattern
> for the component is established?
>
> We do not want to design surface mount products that fail because of
> poor land pattern definition.  Thanks in advance.
>
> Mark Ross
> Senior Design Engineer
> Whistler Auto-Mation Products.
>
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