INPUT EQUIVALENT CIRCUIT

PIN DESCRIPTION

PI N No

SYMBOL

NAME AND FUNCT ION

1

OE

3 State Output Enable

Input (Active LOW)

2, 5, 6,

9, 12, 15,

16, 19

Q0 to Q7

3 State Outputs

3, 4, 7,

8, 13, 14,

17, 18

D0 to D7

Data Inputs

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 OUTPUTSARE LATCHED AT THE TIME WHEN THE LEINPUT ISTAKEN LOW LOGIC LEVEL.

LOGIC DIAGRAM

74VHCT373A

2/10