Jameco Keypad Encoder

I've been researching how to build a hex keypad -- and found....

EDE1144 KEYPAD ENCODER

Keypad Encoder IC from Jameco

Would using this IC qualify me for cheating?

(And why am I having a hard time finding a keypad with keys 0-9 and A-F? Don't they make these anymore?)

How to discharge a capacitor

Here is a simple example:

How to discharge a capacitor