Yes - if you notice, the pins also flare out so they lay flat against the
board.  The part simply lays on the traces, and the pin sitting on the pad
forms a place where capillary action can pull the solder between the two.

By the way, silver-bearing solder flows a little better for this purpose,
but it's not a huge win.

Take a peek at http://www.qsl.net/wb8rcr/AD9850.html for a close up picture
of a TSSOP28 hand soldered.  The web site is dog-slow so it will take a bit
of waiting.  Notice that there is hardly any solder left on top of the pins,
but each pin has a layer of solder gluing it to the pad.

--McD

----- Original Message ----- 
From: "Mcgee, Mark" <mark.mcgee@csfb.com>
To: "'Microcontroller discussion list - Public.'" <piclist@mit.edu>
Sent: Monday, October 18, 2004 8:08 AM
Subject: RE: [EE]TSSOP for diy'er?


> Thanks for a great description of what I need to do!  Now all I need is a
very
> fine tip for my soldering iron and a freestanding magnifying glass!
>
> I notice that the pins from the TSSOP chip aren't long enough to fit
through a
> PCB - I assume I have to mount/solder this on the opposite side of the
PCB,
> i.e. to the copper/track side of the PCB?
>
> Cheers,
> Mark
>
> > -----Original Message-----
> > From: piclist-bounces@mit.edu
> > [mailto:piclist-bounces@mit.edu]On Behalf
> > Of John J. McDonough
> > Sent: 15 October 2004 14:45
> > To: Microcontroller discussion list - Public.
> > Subject: Re: [EE]TSSOP for diy'er?
> >
> >
> > Mark
> >
> > Let me elaborate on this a bit.  I know it seems impossible
> > and although
> > it's not hard, there are a lot of dots unconnected here.
> > <snip>...
>
>
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