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HC595Y Datasheet(PDF) 5 Page - STMicroelectronics

Part # HC595Y
Description  8-bit shift register with output latches (3-state)
PDF  22 Pages
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Manufacturer  STMICROELECTRONICS [STMicroelectronics]
Direct Link  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

HC595Y Datasheet(HTML) 5 Page - STMicroelectronics

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DocID1989 Rev 6
5/22
M74HC595
Functional description
22
Figure 4. Input and output equivalent circuit
Table 3. Truth table(1)
Inputs
Outputs
SI
SCK
SCLR
RCK
G
X
X
X
X
H
QA through QH outputs disable
X
X
X
X
L
QA through QH outputs enable
X
X
L
X
X
Shift register is cleared
LH
X
X
First stage of S.R. becomes “L” other stages store the
data of previous stage, respectively
HH
X
X
First stage of S.R. becomes “H” other stages store the
data of previous stage, respectively
X
H
X
X
State of S.R. is not changed
X
X
X
X
S.R. data is stored into storage register
X
X
X
X
Storage register state is not changed
1. X: don’t care.



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