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MC74AC643DW Folha de dados(PDF) 1 Page - Motorola, Inc

Nome de Peças MC74AC643DW
Descrição Electrónicos  OCTAL BIDIRECTIONAL TRANSCEIVER WITH 3-STATE OUTPUTS
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Fabricante Electrônico  MOTOROLA [Motorola, Inc]
Página de início  http://www.freescale.com
Logo MOTOROLA - Motorola, Inc

MC74AC643DW Folha de dados(HTML) 1 Page - Motorola, Inc

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5-1
FACT DATA
Octal Bidirectional Transceiver
with 3State Outputs
The MC74AC643/74ACT643 octal bus transceiver is designed for asynchronous
two-way communication between data buses. The device transmits data from bus A
to bus B when T/R = HIGH, or from bus B to bus A when T/R = LOW. The enable
input can be used to disable the device so the buses are effectively isolated.
• Bidirectional Data Path
• A and B Outputs Sink 24 mA/Source –24 mA
• ′ACT643 Has TTL Compatible Inputs
19
20
18
16
15
14
2
1
3
4
5
6
7
VCC
13
8
12
9
11
10
OE
B0
B1
B2
B3
B4
B5
B6
B7
T/R
A0
A1
A2
A3
A4
A5
A6
A7
GND
17
PIN NAMES
A0–A7
Side A Inputs or 3-State Outputs
OE
Output Enable Input
T/R
Transmit/Receive Input
B0–B7
Side B Inputs or 3-State Outputs
TRUTH TABLE
OE
T/R
Applied
Inputs
Valid
Direction
I/P
→O/P
Output
H
X
X
X
X
L
H
H
A to B
L
L
H
L
A to B
H
L
L
H
B to A
H
L
L
L
B to A
L
H = HIGH Voltage Level
L = LOW Voltage Level
X = Immaterial
MC74AC643
MC74ACT643
OCTAL BIDIRECTIONAL
TRANSCEIVER WITH
3-STATE OUTPUTS
N SUFFIX
CASE 738-03
PLASTIC
DW SUFFIX
CASE 751D-04
PLASTIC


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