INPUT EQUIVALENT CIRCUIT

PIN DESCRIPTION

PI N No

SYMBOL

NAME AND FUNCT ION

1

OE

3 State Output Enable

Input (Active LOW)

2, 3, 4,

5, 6, 7,

8, 9

D0 to D7

Data Inputs

12, 13, 14,

15, 16, 17,

18, 19

Q0 to Q7

3 State Latch Outputs

11

LE

Latch Enable

Input

10

GND

Ground (0V)

20

Positive Supply Voltage

TRUTH TABLE

INPUTS

OUT PUTS

OE

L E

D

Q

H

XXZ

L

L

X

NO CHANGE *

LHL

L

LH

H

H

X:Don’t care

Z: High impedance

* Q outputs are latched atthe time when the LEinput is taken low logic level.

LOGIC DIAGRAM

74VHCT573A

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