74HC573NB Просмотр технического описания (PDF) - Philips Electronics

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74HC573NB

Octal D-type transparent latch; 3-state

Philips Electronics 

Philips Semiconductors

Octal D-type transparent latch; 3-state

Product specification

74HC/HCT573

Fig.4 Functional diagram.

FUNCTION TABLE

OPERATING

MODES

enable and read

register

(transparent mode)

latch and read

register

latch register and

disable outputs

INPUTS

OE LE DN

LH L

LH H

INTERNAL

LATCHES

L

H

OUTPUTS

Q0 to Q7

L

H

LL l

L

L

LL h

H

H

HL l

L

Z

HL h

H

Z

Notes

1. H = HIGH voltage level

h = HIGH voltage level one set-up time prior to the HIGH-to-LOW

LE transition

L = LOW voltage level

l = LOW voltage level one set-up time prior to the HIGH-to-LOW

LE transition

Z = high impedance OFF-state

December 1990

Fig.5 Logic diagram.

4

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