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74ACT138TTR Datasheet(Hoja de datos) 2 Page - STMicroelectronics

No. de Pieza. 74ACT138TTR
Descripción  3 TO 8 LINE DECODER (INVERTING)
Descarga  10 Pages
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Fabricante  STMICROELECTRONICS [STMicroelectronics]
Página de inicio  http://www.st.com
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 2 page
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74ACT138
2/10
INPUT AND OUTPUT EQUIVALENT CIRCUIT
PIN DESCRIPTION
TRUTH TABLE
X : Don’t Care
LOGIC DIAGRAM
This logic diagram has not be used to estimate propagation delays
PIN No
SYMBOL
NAME AND FUNCTION
1, 2, 3
A, B, C
Address Inputs
4, 5
G2A, G2B
Enable Inputs
6
G1
Enable Input
15, 14, 13,
12, 11, 10, 9,
7
Y0 to Y7
Outputs
8
GND
Ground (0V)
16
VCC
Positive Supply Voltage
INPUTS
OUTPUTS
ENABLE
SELECT
G2B
G2A
G1
CBA
Y0
Y1
Y2
Y3
Y4
Y5
Y6
Y7
X
X
L
X
X
X
HHHHH
HHH
XH
XXXX
HHHHH
HHH
HXXXXX
HHHHH
HHH
LL
H
LLLL
HHHH
HHH
L
L
H
L
L
H
H
L
HHH
HHH
L
L
H
L
H
L
HH
L
H
H
HHH
L
L
H
L
HHHHH
L
H
HHH
L
L
HH
L
L
HHHH
L
HHH
L
L
HH
L
HHHHHH
L
H
H
L
L
HHH
L
HHHHH
H
L
H
L
L
HHHHHHHHH
HH
L




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