74AC138 Fairchild Semiconductor, 74AC138 Datasheet - Page 2
![no-image](/images/manufacturer_photos/0/2/252/fairchild_semiconductor_sml.jpg)
74AC138
Manufacturer Part Number
74AC138
Description
1-of-8 Decoder/Demultiplexer
Manufacturer
Fairchild Semiconductor
Datasheet
1.74AC138.pdf
(9 pages)
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Part Number:
74AC138
Manufacturer:
TOSHIBA/东芝
Quantity:
20 000
Part Number:
74AC138M
Manufacturer:
ST
Quantity:
20 000
Part Number:
74AC138PC
Manufacturer:
NS/国半
Quantity:
20 000
Company:
Part Number:
74AC138SCX
Manufacturer:
FAIRCHILD
Quantity:
8 180
Part Number:
74AC138SCX
Manufacturer:
FAIRCHILD/仙童
Quantity:
20 000
74AC138
2/9
INPUT AND OUTPUT EQUIVALENT CIRCUIT
TRUTH TABLE
X: Don’t Care
LOGIC DIAGRAM
This logic diagram has not be used to estimate propagation delays
G 2B
X
X
H
L
L
L
L
L
L
L
L
ENABL E
G2A
X
H
X
L
L
L
L
L
L
L
L
G1
H
H
H
H
H
H
H
H
X
X
L
INPUTS
C
X
X
X
H
H
H
H
L
L
L
L
SEL ECT
B
H
H
H
H
X
X
X
L
L
L
L
A
H
H
H
H
X
X
X
L
L
L
L
Y0
H
H
H
H
H
H
H
H
H
H
L
PIN DESCRIPTION
Y1
H
H
H
H
H
H
H
H
H
H
L
15, 14, 13,
12, 11, 10,
PIN No
1, 2, 3
4, 5
9, 7
16
6
8
Y2
H
H
H
H
H
H
H
H
H
H
L
SYMBOL
G2A, G2B
Y0 to Y7
A, B, C
OUTPUTS
Y3
H
H
H
H
H
H
H
H
H
H
L
GND
V
G1
CC
Y4
H
H
H
H
H
H
H
H
H
H
L
Address Inputs
Enable Inputs
Enable Input
Outputs
Ground (0V)
Positive Supply Voltage
NAME AND F UNCTIO N
Y5
H
H
H
H
H
H
H
H
H
H
L
Y6
H
H
H
H
H
H
H
H
H
H
L
Y7
H
H
H
H
H
H
H
H
H
H
L