Pin descriptions, Functional diagram, Logic diagram – Diodes 74HC594 User Manual

Page 2

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74AHC594

Document number: DS35484 Rev. 3 - 2

2 of 10

www.diodes.com

June 2013

© Diodes Incorporated

74HC594

Pin Descriptions

Pin Number

Pin Name

Description

1

Q1

Parallel Data Output 1

2

Q2

Parallel Data Output 2

3

Q3

Parallel Data Output 3

4

Q4

Parallel Data Output 4

5

Q5

Parallel Data Output 5

6

Q6

Parallel Data Output 6

7

Q7

Parallel Data Output 7

8 GND

Ground

9

Q7S

Serial Data Output

10

SHR

Shift Register Reset active low

11

SHCP

Shift Register Clock Input

12

STCP

Storage Register Clock Input

13

STR

Storage Register Reset active low

14

DS

Serial Data input

15

Q0

Parallel Data Output 0

16

V

CC

Supply Voltage

Functional Diagram



Logic Diagram

R

D

Q

CP

FF0

D

Q

CP

LATCH

STAGE 0

D

Q

STAGES 1 TO 6

R

D

Q

CP

FF7

D

Q

CP

LATCH

STAGE 7

DS

SHCP

SHR

STCP

STR

Q0

Q1 Q2 Q3

Q5

Q4

Q6

Q7

R

R








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