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Hitachi Power Semiconductor Device Electronic Components Datasheet

HD74HC444 Datasheet

(HD74HC442 - HD74HC444) Quad. Tridirectional Bus Transceiver(with noninverted/inverted 3-state outputs)

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HD74HC442/HD74HC443/HC74HC444
Quad. Tridirectional Bus Transceiver
(with noninverted 3-state outputs)
Quad. Tridirectional Bus Transceiver
(with inverted 3-state outputs)
Quad Tridirectional Bus Transceiver
(with noninverted/inverted 3-state outputs)
Description
These bus transceivers are designed for a synchronous three-way communication between four-line data
buses. They give the designer a choice of selecting inverting, noninverting or a combination of inverting
and noninverting data paths with 3-state outputs.
The S0 and S1 inputs select the bus from which data are to be transferred. The G inputs enable the bus or
buses to which data are to be transferred. The port for any bus selected for input and any other bus not
enabled for output will be at high impedance.
Features
High Speed Operation
High Output Current: Fanout of 15 LSTTL Loads
Wide Operating Voltage: VCC = 2 to 6 V
Low Input Current: 1 µA max
Low Quiescent Supply Current: ICC (static) = 4 µA max (Ta = 25°C)


Hitachi Power Semiconductor Device Electronic Components Datasheet

HD74HC444 Datasheet

(HD74HC442 - HD74HC444) Quad. Tridirectional Bus Transceiver(with noninverted/inverted 3-state outputs)

No Preview Available !

HD74HC442/HD74HC443HD74HC444
Function Table
Inputs
Transfers Between Buses
CS S1 S0 GA GB GC HD74HC442
H X X X X X None
HD74HC443
None
X H H X X X None
None
X X X H H H None
None
X L L X H H None
None
X L H H X H None
None
X H L H H X None
None
L L L X L L A B, A C
A B, A C
L L H L X L B C, B A
B C, B A
L H L L L X C A, C B
C A, C B
L L L X L H AB
AB
L L H H X L BC
BC
L H L L H X CA
CA
L L L X H L AC
AC
L L H L X H BA
BA
L H L H L X CB
CB
HD74HC444
None
None
None
None
None
None
A B, A C
B C, B A
C A, C B
AB
BC
CA
AC
BA
CB
2


Part Number HD74HC444
Description (HD74HC442 - HD74HC444) Quad. Tridirectional Bus Transceiver(with noninverted/inverted 3-state outputs)
Maker Hitachi Semiconductor
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HD74HC444 Datasheet PDF






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