RE: Multi cabinet control panel routing

On Thu, 3 Dec 1998, Clay Cowgill wrote:

> 100 pin TQFP! Aiiiiigggh!!! Run for the hills! ;-)
>
> TQFP's are kind-of tricky to work with compared to packages with larger
> leadspacing. If you have a pretty good soldering iron you can probably
> hand mount the TQFP. Takes some practice. If you know someone with a
> little reflow oven and paste dispenser more the better...

        They have 100-TQFP sockets, actually....

        They're kind of crappy, but for a digital circuit, it really
doesn't matter. The socket kind of comes in two parts, and you screw
the top one to the bottom, with the chip in the middle.

        (The last chip I worked on was in a 100-TQFP. It had 100 dB DACs
in it, and it really complicated the process of characterizing the analog
performance in-house.)

Joe
Received on Thu Dec 3 14:36:31 1998