m74hc595 STMicroelectronics, m74hc595 Datasheet - Page 2

• Manufacturer Part Number: m74hc595
• Description: 8 Bit Shift Register With Output Latches 3 State
• Manufacturer: STMicroelectronics

M74HC595
INPUT AND OUTPUT EQUIVALENT CIRCUIT
TRUTH TABLE
X: Don’t Care
LOGIC DIAGRAM
This logic diagram has not be used to estimate propagation delays
2/16
SI
H
X
X
X
X
X
X
L
SCK
X
X
X
X
X
INPUTS
SCLR
H
H
H
X
X
X
X
L
RCK
X
X
X
X
X
X
G
H
X
X
X
X
X
X
L
PIN DESCRIPTION
1, 2, 3, 4, 5,
6, 7, 15
PIN N°
STORAGE REGISTER STATE IS NOT CHANGED
10
13
14
12
16
11
FIRST STAGE OF S.R. BECOMES "H" OTHER
9
8
FIRST STAGE OF S.R. BECOMES "L" OTHER
STAGES STORE THE DATA OF PREVIOUS
STAGES STORE THE DATA OF PREVIOUS
S.R. DATA IS STORED INTO STORAGE
QA THRU QH OUTPUTS DISABLE
STATE OF S.R. IS NOT CHANGED
QA THRU QH OUTPUTS ENABLE
SHIFT REGISTER IS CLEARED
SYMBOL
QA to QH
STAGE, RESPECTIVELY
STAGE, RESPECTIVELY
SCLR
GND
SCK
RCK
V
QH’
SI
G
CC
REGISTER
OUTPUTS
Data Outputs
Serial Data Outputs
Shift Register Clear Input
Shift Register Clock Input
Output Enable Input
Serial Data Input
Storage Register Clock
Input
Ground (0V)
Positive Supply Voltage
NAME AND FUNCTION