M54HC595D datasheet(2/15 Pages) STMICROELECTRONICS

Part #	M54HC595D

Description	RAD-HARD 8 BIT SHIFT REGISTER WITH OUTPUT LATCHES (3 STATE)

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Manufacturer	STMICROELECTRONICS [STMicroelectronics]

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M54HC595

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Figure 1: IEC Logic Symbols

Figure 2: Input And Output Equivalent Circuit

Table 1: Pin Description

Table 2: 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

9

QH’

Serial Data Outputs

10

SCLR

Shift Register Clear Input

11

SCK

Shift Register Clock Input

13

G

Output Enable Input

14

SI

Serial Data Input

12

RCK

Storage Register Clock

Input

8

GND

Ground (0V)

16

VCC

Positive Supply Voltage

INPUTS

OUTPUTS

SI

SCK

SCLR

RCK

G

X

H

QA THRU QH OUTPUTS DISABLE

XX

L

QA THRU QH OUTPUTS ENABLE

X

L

X

SHIFT REGISTER IS CLEARED

LH

X

FIRST STAGE OF S.R. BECOMES "L" OTHER

STAGES STORE THE DATA OF PREVIOUS

STAGE, RESPECTIVELY

HH

X

FIRST STAGE OF S.R. BECOMES "H" OTHER

STAGES STORE THE DATA OF PREVIOUS

STAGE, RESPECTIVELY

X

H

X

STATE OF S.R. IS NOT CHANGED

XX

X

S.R. DATA IS STORED INTO STORAGE

REGISTER

X

STORAGE REGISTER STATE IS NOT CHANGED

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