M74HC592

2/14

INPUT AND OUTPUT EQUIVALENT CIRCUIT

PIN DESCRIPTION

TRUTH TABLE

X: Don’t Care

RCO = QA’·QB’·QC’·QD’·QE’·QF’·QG’·QH’ (QA’ to QH’ : INTERNAL OUTPUTS OF THE COUNTER)

PIN No

SYMBOL

NAME AND FUNCTION

1 to 7, 15

A to H

Data Inputs

9RCO

Ripple Carry Output

10

CCLR

Counter Clear Input

11

CCK

Counter Clock Input

12

CCKEN

Counter Clock Enable

Input

13

RCK

Register Clock Input

14

CLOAD

Counter Load Input

8

GND

Ground (0V)

16

Positive Supply Voltage

INPUTS

OUTPUT

RCK

CLOAD

CCLR

CCKEN

CCK

x

L

H

X

X

REGISTER DATA IS LOADED INTO COUNTER

x

H

L

X

X

COUNTER CLEAR

H

H

X

X

THE DATA OF A THRU H INPUTS IS STORED INTO REGISTER

H

H

X

X

REGISTER STATE IS NOT CHANGED

X

H

H

L

COUNTER ADVANCES THE COUNT

X

H

H

L

NO COUNT

X

H

H

H

X

NO COUNT