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74VHCT257A Folha de dados(PDF) 2 Page - STMicroelectronics

Nome de Peças 74VHCT257A
Descrição Electrónicos  QUAD 2 CHANNEL MULTIPLEXER (3-STATE)
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Fabricante Electrônico  STMICROELECTRONICS [STMicroelectronics]
Página de início  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

74VHCT257A Folha de dados(HTML) 2 Page - STMicroelectronics

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Figure 2: Input Equivalent Circuit
Table 2: Pin Description
Table 3: Truth Table
X: Don’t Care
Z: High Impedance
Figure 3: Logic Diagram
This logic diagram has not be used to estimate propagation delays
PIN N°
SYMBOL
NAME AND FUNCTION
1
SELECT
Common Data Select
Inputs
2, 5, 11, 14
1A to 4A
Data Inputs From Source
A
3, 6, 10, 13
1B to 4B
Data Inputs From Source
B
4, 7, 9, 12
1Y to 4Y
3 State Multiplexer
Outputs
15
OE
3 State Output Enable
Inputs (Active LOW)
8
GND
Ground (0V)
16
VCC
Positive Supply Voltage
INPUTS
OUTPUT
OE
SELECT
A
B
Y
H
XXX
Z
LLL
X
L
LL
H
X
H
LH
X
L
L
LH
X
H
H


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