In a message dated 11/4/99 6:10:33 PM Central Standard Time,
[log in to unmask] writes:
> Hello all again,
>
> One day I will learn how to 'speak' English. I apologize for not making
> myself clear the first time around.
>
> I am not looking for specifications for the component packaging, I need to
> find out what industry standards there are for the presentation of the
> components to automatic equipment. In other words, QFP's come on trays,
what
> is the specification for the trays that these come in.
>
> i.e.,
> What is the minimum and maximum size of tray?
> What polarity marking should one expect to find on a tray?
> What, if any, quantity of mixed oriented devices are allowed in a tray from
> the distributor/manufacturer?
> What is the relationship of tray polarity to device polarity?
> What size devices are expected in what size tray?
>
> Like tape and reel specs for thru-hole packing. I have only found the
> IPC-481 series which deals with the carrier taping. I believe I have that
> much under control, however I do need to address trays and tubes at least.
>
> Maybe I am out to lunch on this issue? (Is that why I am this big?) I know
> we made good use of industry standards for TH tape and reel specifications
> and I am assuming (LOOK OUT!!) and/or hoping that there are similar
> documents in the SM world!?
>
> My immediate issue comes from the fact that we are getting some QFP's with
> all the devices oriented in the same direction to each other, however, that
> direction may not always be the same relative orientation to the tray they
> are supplied in. I need to tell our vendors we want all parts supplied with
> the same orientation, but I do not want to re-invent the wheel so to speak!
> (OK, who said that.... I am not lazy,....well.....OK.....when you put it
> that way!)
>
> Still lost and flapping my wings!
>
> Richard Hamilton
> Clemar Mfg. / Rain Bird
> [log in to unmask]
Hey Richard!
Did you go through that Topline page that I sent ya'? It's gotta lot of the
stuff that you're looking for...standard JEDEC tray sizes, standard reel
sizes, etc., ect...I knew what you were looking for...
But if that isn't what you need, go to:
http://www.jedec.org/download/default.htm
that's a page where all there's all kinds of EIA/JEDEC industry standards
that you can download for free...you'll need to go through all the standards
to look for the ones you need...I'm not gonna do all the work for
ya'...hehehe.
But as far as orientation of pin one, you'll need to take what you get from
your vendors, I don't think everybody is working together that close
yet...just as long as they're all the same from a particular vendor is about
all you can expect.
Happy flappin'...hehehe
-Steve Gregory-
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