74VHC594 datasheet(2/14 Pages) STMICROELECTRONICS

Teilenummer	74VHC594

Bauteilbeschribung	8 BIT SHIFT REGISTER WITH OUTPUT REGISTER

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Hersteller	STMICROELECTRONICS [STMicroelectronics]

Direct Link	http://www.st.com

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74VHC594

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Figure 2: Input Equivalent Circuit

Table 2: Pin Description

Table 3: Truth Table

X: Don’t Care

PIN N°

SYMBOL

NAME AND FUNCTION

1, 2, 3, 4, 5,

6, 7, 15

QA to QH

Data Outputs

QH’

Serial Data Output

SCLR

Shift Register Clear Input

SCK

Shift Register Clock Input

RCLR

Storage Register Clear

Input

Serial Data Input

RCK

Storage Register Clock

Input

GND

Ground (0V)

VCC

Positive Supply Voltage

INPUTS

OUTPUTS

SCK

SCLR

RCK

RCLR

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

SHIFT REGISTER STATE IS NOT CHANGED

STORAGE REGISTER IS CLEARED

SHIFT REGISTER DATA IS STORED IN THE

STORAGE REGISTER

STORAGE REGISTER STATE IS NOT CHANGED

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