TechNetters,
I would like to take this time to offer the best of Holiday spirits to
one and all!!
And to those who cannot read, I will offer to buy glasses. And to those
who are so busy jumping to conclusions, take a holiday!
I thought the idea here was to 'float' a question with basic details ("I
have been very unsuccessful....") and if someone had further details
they could respond, and we could go from there. I guess I am in another
world. Sorry for the inconvenience.
Richard Hamilton *<():}>
Clemar Mfg. / Rain Bird
[log in to unmask]
> -----Original Message-----
> From: Jack Crawford [SMTP:[log in to unmask]]
> Sent: Monday, December 22, 1997 1:26 PM
> To: [log in to unmask]
> Subject: Re: [TN] Cost comparisons TH vs SMT
>
> Jerry, this is a really nice and thought-inducing response. A
> wonderful example of
> suggesting to a user how they can arrive at a solution to their needs.
> (It's the give
> a fish/teach to fish concept at its best.) Thanks for your support of
> the TechNet,
> and we look forward to your continued sage advice in the coming year.
> We wish you
> all the best for this Holiday season, and a wonderful and prosperous
> New Year. Jack
>
> Jack Crawford, IPC Project Manger - Assembly
> 2215 Sanders Road, Northbrook IL 60062-6135
> [log in to unmask] http://www.ipc.org
> 847-509-9700 x 393
> fax 847-509-9798
>
> >>> Jerry Cupples <[log in to unmask]> 12/22/97 02:32PM >>>
>
> <snip-questions about cost comparisons of through-hole vs SMT
> components>
>
> It being near Christmas, I should be nice and offer plenty of kind and
> helpful responses to your posted requests.
>
> BUT, at this time of year, my own feelings (production support and
> management) are more like those of E. Scrooge - trying to make the
> quarter,
> ship those boards, tote that bale, and the d---d ISO auditor will be
> here
> in early January. I'm already paddling my "boat" as fast as I can, so
> "Humbug" is the real sentiment here, be warned.
>
> You guys need to look for yourself first, then ask for help. Your
> requests
> didn't sound very moving - much too general. What kinds of parts?
> logic,
> RAM, microprocessor, PLD? Where did you look? Or did you just ask the
> world
> a week or so back and not get a complete free answer via electronic
> auto-response?
>
> Here are some suggestions.
>
> Make a list of the parts to buy/use based on what you are designing or
> are
> already using. Strip it down to a list of your most popular 30 part
> numbers, and list by generic part type (i.e. 74FCT244, 74ALS244,
> 74HCT244,
> 74LCX244, etc.). If you don't have a list, you will have trouble
> getting
> any price numbers from anyone in the real world. Make up an imaginary
> BOM
> if you must, but get some actual part numbers ready, first step - not
> to be
> skipped.
>
> Then, you can look on the web several places, try
> http://www.marshall.com/
> which is a distributor site searchable by part number, and they will
> give
> quotes from the site. Also, http://www.national.com/ is the National
> Semi
> site, they did show the pricing and availability of various package
> styles.
> Lastly, try http://www.digikey.com/ for similar disty info.
>
> My impression is the newer logic types such as LCX (low power CMOS)
> are
> only being offered in the SMT packages. Through hole is unquestionably
> on
> the ramp down, and a minority portion of the market in 1997. In the
> past
> few years, the mainstream semiconductor manufacturers are seemingly
> looking
> for excuses (the famous mold compound shortage of a few years back) to
> drop
> the DIP packages from their price lists, as these tend to be slower
> sellers.
>
> Incidentally, most of the big semiconductor OEMS publish an annual
> "price
> list" which shows the various packages offered and the "recommended
> distributor resale" price. Moto publishes theirs on CR ROM, and it
> shows
> all the package styles and the resale price. This price is sort of a
> high
> trade price that just about anyone can get, and if you buy lots, you
> can
> get discounts as high as 40-50% of those. You can call a local rep for
> Moto, National, TI, etc. and get one of these easily.
>
> I would also venture to guess that the pricing on _available_ parts in
> DIP
> vs SOT or SSOP is pretty close, but that prices may actually be higher
> for
> the DIP, as this sort of packaging is less commonly used by volume
> producers. This is a guess on my part, you should confirm this if more
> depends on it than a term paper.
>
> If you are in the market for these parts, why not simply call your
> distributors and ask them to do some research into pricing. In most
> cases,
> they will do this if you provide a list with expected volumes.
>
> So maybe Santa will grant your requests from a more generous source
> than
> old Scrooge here, but at worst these are some "gift" suggestions to
> help
> yourself with.
>
>
> cheers,
>
>
> Jerry Cupples
> Interphase Corporation
> Dallas, TX USA
> http://www.iphase.com
>
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