Tony,
According to a datasheet downloaded from
www.freetradezone.com (free
registration, and supposedly 12 million component datasheets -- I believe
it, as there's yet to be a part I haven't found)....
It's a CMOS 4-bit magnitude comparator...
1: B3
2: (A < B) IN
3: (A = B) IN
4: (A > B) IN
5: (A > B) OUT
6: (A = B) OUT
7: (A < B) OUT
8: VSS
9: B0
10: A0
11: B1
12: A1
13: A2
14: B2
15: A3
16: VDD
I can email the datasheet if you'd like.... It's a 220KB .PDF file...
Rich B.
"They that can give up essential liberty
to obtain a little temporary safety deserve
neither liberty nor safety." -- Ben Franklin