4011 : 2-input NAND gates (easy IC )

Source :: http://www.doctronics.co.uk/4011.htm

Pin connections

The 4011 has four separate 2-input NAND
gates which you can use independently.

Truth table

The truth table of each individual gate is:

input B	input A	output
0	0	1
0	1	1
1	0	1
1	1	0

where '0' represents a LOW voltage, and '1' represents a HIGH voltage.