13 Mar
2005
13 Mar
'05
6:46 p.m.
Tony wrote:
Thanks
Does anyone have a pinout for the Signetics 82S83
BCD full-adder chip (16
pin DIL package)? A google search didn't turn up anything useful that I
could see.
Happened to have the relevant data book less than three feet from where
I'm sitting.
------ ------
B2 | 1 u 16 | Vcc
B4 | 2 15 | A4
B8 | 3 14 | A2
A8 | 4 13 | A1
Cin | 5 12 | B1
Cout | 6 11 | S1
S4 | 7 10 | S2
GND | 8 9 | S8
-------------
Assuming you've numbered the pins with their bit-values rather than the
bit-number (which is what is done in the 74F583 data sheet), then the
pinout _is_ the same as the 74F583, altough the latter is much faster.
I am not suprised. I had already found what looked like a carry chain
linking pin 6 on one chip to pin 5 on the next...
[...]
The 82S82 is similar but can also subtract, has an A=B
output,
and has G and P outputs for lookahead carry. It's in a 24-pin
package.
Sounds similar to the 74F582. Maybe even the same pinout
Thanks again for the data
-tony