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74HC540
Octal Inverting Buffer 3-State
Datasheet (PDF)
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74HC540
DIP-20
1
~OE1
2
A0
3
A1
4
A2
5
A3
6
A4
7
A5
8
A6
9
A7
10
GND
20
VCC
19
~OE2
18
~Y0
17
~Y1
16
~Y2
15
~Y3
14
~Y4
13
~Y5
12
~Y6
11
~Y7
vcc
gnd
in
out
io
Pin Reference
⌄
#
Label
Type
1
~OE1
in
2
A0
in
3
A1
in
4
A2
in
5
A3
in
6
A4
in
7
A5
in
8
A6
in
9
A7
in
10
GND
gnd
11
~Y7
out
12
~Y6
out
13
~Y5
out
14
~Y4
out
15
~Y3
out
16
~Y2
out
17
~Y1
out
18
~Y0
out
19
~OE2
in
20
VCC
vcc