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HD74HC540 fiches techniques PDF

Hitachi Semiconductor - Octal Buffers/Line Drivers (with 3-state outputs)

Numéro de référence HD74HC540
Description Octal Buffers/Line Drivers (with 3-state outputs)
Fabricant Hitachi Semiconductor 
Logo Hitachi Semiconductor 





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HD74HC540 fiche technique
HD74HC540/HD74HC541
Octal Buffers/Line Drivers (with 3-state outputs)
Description
The HD74HC540 is an inverting buffer and the HD74HC541 is a non-inverting buffer. The 3-state control
gate operates as a two-input NOR such that if either G1 or G2 are high, all eight outputs are in the high-
impedance state.
Features
High Speed Operation: tpd = 11.5 ns typ (CL = 50 pF)
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)
Function Table
Inputs
G1 G2
LL
A
L
LL
H
HX
X
XH
X
X : irrelevant
Z : off (high-impedance) state of a 3-state output.
Output Y
HD74HC540
H
L
Z
Z
HD74HD541
L
H
Z
Z

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