M54HC692M1R datasheet(2/23 Pages) STMICROELECTRONICS

Part #	M54HC692M1R

Description	HC691/693 4 BIT BINARY COUNTER/REGISTER 3-STATE HC690/692 DECADE COUNTER/REGISTER 3-STATE

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Manufacturer	STMICROELECTRONICS [STMicroelectronics]

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counter’s outputs are stored in the output register at

the positive edge of the register clock (RCK). If the

register clear input (RCLR) is held ”L” the register is

cleared (synchronously

to

register

clock for

HC692/HC693

and

asynchronously

for

HC690/HC691). All inputs are equipped with protec-

tion circuits against static discharge and transient

excess voltage.

INPUT AND OUTPUT EQUIVALENT CIRCUIT

PIN DESCRIPTION

PIN No

SYMBOL

NAME AND FUNCTION

3 to 6

A to D

Data Inputs

7, 14

ENT, ENP

Enable Inputs

15 to 18

QA to QD

Data Outputs

1

CCLR

Counter Clear (Active

LOW)

2

CCK

Counter Clock

11

R/C

Counter/ Register Select

8

RCLR

Register Clear (Active

LOW)

9

RCK

Register Clock

19

RCO

Ripple Counter Output

10

GND

Ground (0V)

20

VCC

Positive Supply Voltage

IEC LOGIC SYMBOLS

HC691

HC692

HC693

HC690

M54/M74HC690/691/692/693

2/23

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