M74HC237 データシートの表示（PDF） - STMicroelectronics
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M74HC237 Datasheet PDF : 11 Pages
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M74HC237
INPUT AND OUTPUT EQUIVALENT CIRCUIT
PIN DESCRIPTION
PIN No
1, 2, 3
4
5
6
15, 14, 13,
12, 11, 10, 9,
7
8
16
SYMBOL
A, B, C
GL
G2
G1
Y0 to Y7
NAME AND FUNCTION
Data Inputs
Latch Enable Input
Data Enable Input (Active
LOW)
Data Enable Input (Active
HIGH)
Decoder Outputs
GND
VCC
Ground (0V)
Positive Supply Voltage
TRUTH TABLE
INPUTS
ENABLE
SELECT
GL G2 G1
C
B
A
X
X
L
X
X
X
X
H
X
X
X
X
L
L
H
L
L
L
L
L
H
L
L
H
L
L
H
L
H
L
L
L
H
L
H
H
L
L
H
H
L
L
L
L
H
H
L
H
L
L
H
H
H
L
L
L
H
H
H
H
H
L
H
X
X
X
X : Don’t Care
OUTPUTS
Y0
Y1
Y2
Y3
Y4
Y5
Y6
Y7
L
L
L
L
L
L
L
L
L
L
L
L
L
L
L
L
H
L
L
L
L
L
L
L
L
H
L
L
L
L
L
L
L
L
H
L
L
L
L
L
L
L
L
H
L
L
L
L
L
L
L
L
H
L
L
L
L
L
L
L
L
H
L
L
L
L
L
L
L
L
H
L
L
L
L
L
L
L
L
H
Outputs corresponding to stored address H: all others L
2/11
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