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SA555 Folha de dados(PDF) 15 Page - STMicroelectronics

Nome de Peças SA555
Descrição Electrónicos  General purpose single bipolar timers
PDF  20 Pages
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Fabricante Electrônico  STMICROELECTRONICS [STMicroelectronics]
Página de início  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

SA555 Folha de dados(HTML) 15 Page - STMicroelectronics

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NE555 - SA555 - SE555
Application information
15/20
Figure 21.
50% duty cycle oscillator
Note that this circuit will not oscillate if RB is greater than 1/2 RA because the junction of RA
and RB cannot bring pin 2 down to 1/3 VCC and trigger the lower comparator.
4.6
Additional information
Adequate power supply by passing is necessary to protect associated circuitry. The
minimum recommended is 0.1µF in parallel with 1µF electrolytic.
Out
RA
C
NE55
2
4
3
1
5
6
7
8
VCC
51k
Ω
RB
22k
Ω
0.01
μF
VCC
0.01
μF



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