16 Apr
2005
16 Apr
'05
11:39 a.m.
Does anyone have a datasheet for these? I THINK they're Quad 2 input
multiplexers but I'm not sure. I found them in an i8008 computer system.
Joe
16 Apr
16 Apr
12:02 p.m.
Joe wrote:
Does anyone have a datasheet for these? I THINK
they're Quad 2 input
multiplexers but I'm not sure. I found them in an i8008 computer system.
Yes. They're a bit unusual as they have two select inputs. It's the
inverting open-collector version of the 8233, so you can get the
complements of the A or B inputs, or 1.
-----U-----
A0 | 1 16 | Vcc
B0 | 2 15 | A3
f0 | 3 14 | B3
f1 | 4 13 | f3
B1 | 5 12 | f2
A1 | 6 11 | B2
S1 | 7 10 | A2
GND | 8 9 | S0
-----------
Truth table:
8233/
82S33 8234/
(totem 82S34 8235
pole) (open collector)
S0 S1 fn fn fn
---- ---- ----- ----- -------
0 0 B /B /A * B
0 1 B /B B
1 0 A /A /A
1 1 0 1 1
7192
days inactive
7192
days old
1 comments
2 participants
participants (2)
-
eric＠brouhaha.com -
rigdonj＠cfl.rr.com