Does not necessarily need to be hi temp. The distance from the main PWB to those solder connections in most cases would be sufficient to dissipate enough heat to prevent reflow. And if they do reflow the pins are held in place on the daughter board by the clips and at the main board by the through holes.
-----Original Message-----
From: Ted Kong [mailto:[log in to unmask]]
Sent: Friday, November 14, 2003 6:02 PM
To: [log in to unmask]
Subject: Re: [TN] Replacing a DIP package
Hi all,
Just a reminder that the solder at those pins are most
likely high temp solder; otherwise this part could not
be processed with wave soldering.
Ted
--- "Croslin, Robert"
<[log in to unmask]> wrote:
> Dann, we've done more than our share of these as our
> stuff gets built for 20
> - 25 years and obsolescence is an issue, but what
> we've used for pins are
> strip style headers on .10 centers. That way, it
> all fits within normal
> processes. In looking at your picture, it almost
> looks like the pins may
> have been on a band that was broken away after they
> were soldered. It would
> almost certainly have to be fixture to hold
> alignment, but this is the first
> time I've seen those pins. Any chance you could use
> a strip header? You do
> have to watch the height, though.
>
> Bob Croslin
> Nielsen Media Research
>
>
> -----Original Message-----
> From: d. terstegge
> [mailto:[log in to unmask]]
> Sent: Friday, November 14, 2003 9:01 AM
> To: [log in to unmask]
> Subject: [TN] Replacing a DIP package
>
>
> Hi Technet,
>
>
http://www.parallax.com/images/prod_jpg/bs2p24-ic.jpg
> is a picture of a
> tiny pcb assembly that can be wavesoldered onto a
> motherboard almost
> like a normal through-hole package. Due to an
> obsolescense problem we
> are thinking about replacing a 22-pins DIP-package
> by a construction
> similar to what's in the picture.
> Does anyone know what technology to use to get the
> sidepins connected
> to the substrate, and does this fit within a normal
> PCB Assembly
> process? Also any ideas about alternative solution
> are more then
> welcome.
>
> Best regards!
>
> Daan Terstegge
> Thales Communications
> Unclassified mail
> Personal Website: http://www.smtinfo.net
>
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