If you'd actually had a look at the datasheet I linked to you'd see
the recommended _MALE_ pattern in there, including clearance for this
particular connector. It's always like this, the female connector
prescribes the pattern for card edge.
Since you seem to be talking specifically about the ISA slot, here are
the mechanical dimensions:
<
http://www.xs4all.nl/~ganswijk/chipdir//////oth/sokos/isa.txt>
The correct publication would be IEEE-P996, but since it never got
finished it is hard to get. Probably the original IBM PC
specification, or even earlier telecom specifications (from which the
ISA slot was inherited) will also have the dimensions.
If that isn't "official" enough I again suggest to go by what your
socket manufacturer says. For example this datasheet of the ISA
connector has _again_ the recommended male finger pattern in it.
<
http://www.hirose.co.jp/cataloge_hp/e54801112.pdf>
All this information was easy to find in 5 minutes with google. I put
it down to stress while finishing your project.
ST
On Sat, Feb 13, 2010 at 12:57 AM, alienrelics <alienrelics@...> wrote:
> All that tells me is how deep the socket is, and the pitch. I can find diagrams for the sockets all day. I know the pitch, because I select it. What I need to know is the clearance between pads. And I can't eyeball it, this is for a class and we are specifically not allowed to "eyeball" or estimate anything. I have to show where I got my numbers.
>
> If this were for my use only, I could toss a board under my microscope with a ruler and estimate it very closely.
>
> Heck, this book I'm working out of is pretty old. Most of the assignments require 20/20 rules for logic and small signal analog.
>
> Thanks,
> Steve Greenfield
>
> --- In Homebrew_PCBs@yahoogroups.com, Stefan Trethan <stefan_trethan@...> wrote:
>>
>> The correct pattern is determined by the mating connector. You should
>> find the recommended pattern in it's datasheet, like this for example:
>> <http://www.edac.net/file_library/series/39_737.pdf>
>>
>> If there is nothing in the datasheet for your connector ask the
>> supplier, or eyeball it. There are some differences between the
>> different brands of connectors, some have one contact, some have them
>> split in two, etc..
>>
>>
>> Remember that gold plating the edge connector usually requires you (or
>> the board shop) to extend the tongues out and run them together in a
>> shorting bar, so they can be contacted for gold plating. Have a look
>> at an extremely bad image here:
>> <http://t2.gstatic.com/images?q=tbn:d91SlFCXorXWaM:http://www.ettech.com.tw/English/picture/FR-4,%20Edge%20plating,%20Sink%20Milling,%20Medical%20PCB-1%20.JPG>
>>
>> ST
>>
>>
>> On Fri, Feb 12, 2010 at 6:09 PM, Steve Greenfield <alienrelics@...> wrote:
>> > I've done quite a bit of Googling, and all I find are diagrams and measurements of edge-connector sockets. Or just the outer dimensions of the PCB edge-connector. I am looking for the specs for trace width, spacing, and length.
>> >
>> > Any ideas?
>> >
>> > Thanks,
>> > Steve Greenfield
>> > Electronic Engineering Technician student
>> > Electronic Technician 20+ years
>> > CET Computers and Consumer Electronics
>> > IPC-A-610D CIS Specialist
>> >
>> >
>> >
>> > ------------------------------------
>> >
>> > Be sure to visit the group home and check for new Links, Files, and Photos:
>> > http://groups.yahoo.com/group/Homebrew_PCBsYahoo! Groups Links
>> >
>> >
>> >
>> >
>>
>
>
>
>
> ------------------------------------
>
> Be sure to visit the group home and check for new Links, Files, and Photos:
> http://groups.yahoo.com/group/Homebrew_PCBsYahoo! Groups Links
>
>
>
>