74HCT138D 查看數據表（PDF） - Philips Electronics
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74HCT138D Datasheet PDF : 7 Pages
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Philips Semiconductors
3-to-8 line decoder/demultiplexer; inverting
PIN DESCRIPTION
PIN NO.
1, 2, 3
4, 5
6
8
15, 14, 13, 12, 11, 10, 9, 7
16
SYMBOL
A0 to A2
E1, E2
E3
GND
Y0 to Y7
VCC
NAME AND FUNCTION
address inputs
enable inputs (active LOW)
enable input (active HIGH)
ground (0 V)
outputs (active LOW)
positive supply voltage
Product specification
74HC/HCT138
Fig.1 Pin configuration.
handbook, halfpage
1
2
3
4
5
6
A0
A1
A2
E1
E2
E3
Y0
15
Y1
14
Y2
13
Y3
12
Y4
11
Y5
10
Y6
9
Y7
7
MLB312
Fig.2 Logic symbol.
(a)
(b)
Fig.3 IEC logic symbol.
September 1993
3
Fig.4 Functional diagram.
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