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circuits
74140 - (2x) NAND 4-input (50 ohm line driver)
pinout
1
1A
14
VCC
2
1B
13
2D
3
NC
12
2C
4
1C
11
NC
5
1D
10
2B
6
1Y
9
2A
7
GND
8
2Y
74140
www.nanobob.com
symbol
1
1A
2
1B
6
1Y
4
1C
5
1D
9
2A
10
2B
8
2Y
12
2C
13
2D
function table
A
B
C
D
Y
0
x
x
x
1
x
0
x
x
1
x
x
0
x
1
x
x
x
0
1
1
1
1
1
0
pin types
0
digital input
0
digital output
0
digital input-output (bidir)
0
analog (input or output)
0
positive power
0
ground
0
negative power