74VHC594MTR 데이터 시트보기 (PDF) - STMicroelectronics

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74VHC594MTR

8 BIT SHIFT REGISTER WITH OUTPUT REGISTER

STMicroelectronics 

74VHC594

INPUT EQUIVALENT CIRCUIT

TRUTH TABLE

SI

SCK

X

X

L

INPUTS

SCLR

L

H

RCK

X

X

H

H

X

L

H

X

X

X

X

X

X

X

X

X

X

X

X: Don’t Care

PIN DESCRIPTION

PIN No

1, 2, 3, 4, 5,

6, 7, 15

9

10

11

13

14

12

8

16

SYMBOL NAME AND FUNCTION

QA to QH Data Outputs

QH’

SCLR

SCK

RCLR

SI

RCK

GND

VCC

Serial Data Output

Shift Register Clear Input

Shift Register Clock Input

Storage Register Clear

Input

Serial Data Input

Storage Register Clock

Input

Ground (0V)

Positive Supply Voltage

RCLR

X

X

X

OUTPUTS

SHIFT REGISTER IS CLEAR

FIRST STAGE OF SHIFT REGISTER GOES LOW

OTHER STAGES STORE THE DATA OF PREVI-

OUS STAGE, RESPECTIVELY

FIRST STAGE OF SHIFT REGISTER GOES HIGH

OTHER STAGES STORE THE DATA OF PREVI-

OUS STAGE, RESPECTIVELY

X

SHIFT REGISTER STATE IS NOT CHANGED

L

STORAGE REGISTER IS CLEARED

H

SHIFT REGISTER DATA IS STORED IN THE

STORAGE REGISTER

H

STORAGE REGISTER STATE IS NOT CHANGED

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