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M54/M74HC237
INPUT AND OUTPUT EQUIVALENT CIRCUIT
IEC LOGIC SYMBOLS
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
GND
VCC
NAME AND FUNCTION
Data Inputs
Latch Enable Input
(Active LOW)
Data Enable Input
(Active LOW)
Data Enable Input
(Active HIGH)
Decoder Outputs
Ground (0V)
Positive Supply Voltage
TRUTH TABLE
INPUTS
ENABLE
SELECT
GL G2 G1 C B A
XXL XXX
XHXXXX
L LHL L L
L LHL LH
L LHLHL
L L HL HH
L L HH L L
L L HH LH
L L HHH L
L L HHHH
H L HX XX
X: Don’t Care
OUTPUS
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
OUTPUT CORRESPONDING TO STORED ADDRESS, H: ALL OTHERS, L
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