74LVQ163

2/13

INPUT AND OUTPUT EQUIVALENT CIRCUIT

PIN DESCRIPTION

TRUTH TABLE

X : Don’t Care; A, B, C, D; Logic level of data input; CARRY OUT : TE x QA x QB x QC x QD

PIN No

SYMBOL

NAME AND FUNCTION

1

CLEAR

Reset

2

CLOCK

Clock Input (Positive Edge

Trigger)

3, 4, 5, 6

A, B, C, D

Data Inputs

7

PE

Count Enable Input

10

TE

Count Enable Carry Input

9LOAD

Parallel Enable Input

14, 13, 12,

11

QA to QD

Flip-Flop Outputs

15

CARRY OUT Terminal Count Output

8

GND

Ground (0V)

16

Positive Supply Voltage

INPUTS

OUTPUTS

FUNCTION

CLEAR

LOAD

PE

TE

CK

L

X

X

X

L

L

L

L

RESET TO "0"

H

L

X

X

A

B

C

D

PRESET DATA

H

H

X

L

NO CHANGE

NO COUNT

H

H

L

X

NO CHANGE

NO COUNT

HHHH

COUNT UP

COUNT

H

X

X

X

NO CHANGE

NO COUNT