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HD74HC444 Datasheet PDF

Hitachi HD74HC444

The S 0 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.
Part No. HD74HC444
Datasheet HD74HC444 Download
Manufacturer
Hitachi
Description Quad. Tridirectional Bus Transceiver(with noninverted/inverted 3-state outputs)
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HD74HC444 datasheet page 1 preview

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 port for any bus selected for input and any other bus not enabled for output will be at high impedance.

FEATURES

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● 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) HD74HC442/HD74HC443HD74HC444 Function Table Inputs CS H X X X X X L L L L L L L L L S1 X H X L L H L L H L L H L L H S0 X H X L H L L H L L H L L H L GA X X H X H H X L L X H L X L H GB X X H H X H L X L L X H H X L GC X X H H H X L L X H L X L H X Transfers Between Buses HD74HC442 None None None None None None A → B, A → C B → C, B → A C → A, C → B A→B B→C C→A A→C B→A C→B HD74HC443 None None None Non...
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