M74HC699 查看數據表（PDF） - STMicroelectronics

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M74HC699

HC697/699 U/D 4 BIT BINARY COUNTER/REGISTER (3-STATE) , HC696/698 U/D DECADE COUNTER/REGISTER (3-STA

STMicroelectronics 

M54/M74HC696/697/698/699

PIN DESCRIPTION

PIN No

1

2

3, 4, 5, 6

7, 14

8

9

11

12

13

15, 16, 17,

18

19

10

20

SYMBOL

U/D

CCK

A to D

EMP/ENT

CCLR

RCK

R/C

G

LOAD

QA to QD

RCO

GND

VCC

NAME AND FUNCTION

Up Down Counter Selector

Counter Clock

Data Inputs

Enable P and T

Counter Clear (Active

LOW)

Register Clock

Register Counter Selector

Enable Input

Load Counter (Active

LOW)

Data Outputs

Load Counter (Active

HIGH)

Ground (0V)

Positive Supply Voltage

IEC LOGIC SYMBOL

INPUT AND OUTPUT EQUIVALENT CIRCUIT

HC696

HC697

HC698

2/22

HC699

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