74HC datasheet(3/6 Pages) NXP

Il numero della parte	74HC

Spiegazioni elettronici	Quad buffer/line driver; 3-state

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Produttore elettronici	NXP [NXP Semiconductors]

Homepage	http://www.nxp.com

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3 / 6 page

December 1990

3

Philips Semiconductors

Product speciﬁcation

Quad buffer/line driver; 3-state

74HC/HCT125

PIN DESCRIPTION

PIN NO.

SYMBOL

NAME AND FUNCTION

1, 4, 10, 13

1OE to 4OE

outputs enable inputs (active LOW)

2, 5, 9, 12

1A to 4A

data inputs

3, 6, 8, 11

1Y to 4Y

data outputs

7

GND

ground (0 V)

14

VCC

positive supply voltage

Fig.1 Pin configuration.

Fig.2 Logic symbol.

Fig.3 IEC logic symbol.

(a)

(b)

Fig.4 Functional diagram.

Fig.5 Logic diagram (one buffer).

FUNCTION TABLE

Note

1. H = HIGH voltage level

L = LOW voltage level

X = don’t care

Z = high impedance OFF-state

INPUTS

OUTPUT

nOE

nA

nY

L

H

L

H

X

L

H

Z

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