14 Oct
2007
14 Oct
'07
1:14 p.m.
On 10/13/07, Roy J. Tellason <rtellason at verizon.net> wrote
I don't know if they are still available (I've never looked), but I
remember reading about some devices in 6-pin SMD paackages that were
basically single 2-input multiplexers. One type had a non-inerting
output, like 1/4 or a 74157, the other was inverting, like 1/4 of a
74158. I thin kthe part numbers contained '157' and '158' but I can't
really rememebr.
By crafule wiring you could make most of the common 2-input logic gates
And what's funny is that there now seems to
be some stuff out there that's
offering as simple as single gates in a small surface-mount package.
The first one of those I saw was a single-gate NAND in a 5-pin
pseudo-SOT-23 package (don't know the proper designation) on a Palm
Pilot memory board over 10 years ago. I still have some older Palms
that might be upgradable, but you need both the RAM chip _and_ an
extra NAND to fully populate the partially-empty boards.
No idea where to get just a couple of those these days. Probably the
easiest thing is to scrape them off of a Palm SIMM from an old Palm
with a broken screen. from one or other of these devices.
-tony