On the data sheet, name the device in Figure 9, and appropriately name the four pins A, B, C, and D according to what the device is. Check your Digital Logic book for some guidance.
The Attempt at a Solution
So I've set up a truth table for this equation and got
A B C D
0 0 1 1
0 1 1 0
1 0 0 1
1 1 0 0
So having looked at this, it appears as if the two inputs are reversed. However, I'm not sure if there is an actual device out there that this represents, or just a configuration of gates. I've checked my books and nothing sticks out. Any ideas?