2002 Mar 04

3

Philips Semiconductors

Product specification

Octal D-type flip-flop; positive edge-trigger;

3-state

74ALVC574

ORDERING INFORMATION

FUNCTION TABLE

See note 1.

Note

1. H = HIGH voltage level;

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

L = LOWvoltage level;

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

↑ = LOW-to-HIGH clock transition;

Z = high-impedance OFF-state.

PINNING

TYPE NUMBER

PACKAGES

PINS

PACKAGE

MATERIAL

CODE

74ALVC574D

20

SO

plastic

SOT163-1

74ALVC574PW

20

TSSOP

plastic

SOT360-1

OPERATING MODES

INPUT

INTERNAL

FLIP-FLOPS

OUTPUT

OE

CP

Load and read register

L

↑

lL

L

L

↑

hH

H

Latch and read register

H

↑

lL

Z

H

↑

hH

Z

PIN

SYMBOL

DESCRIPTION

1

OE

output enable input (active LOW)

2, 3, 4, 5, 6, 7, 8, 9

3-state flip-flop output

10

GND

ground (0 V)

11

CP

clock input (LOW-to-HIGH, edge triggered)

12, 13, 14, 15, 16, 17, 18,

19

data input

20

supply voltage