SA555 datasheet(15/20 Pages) STMICROELECTRONICS

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SA555 Arkusz danych(PDF) 15 Page - STMicroelectronics

Numer części	SA555

Szczegółowy opis	General purpose single bipolar timers

PDF	20 Pages

Scroll/Zoom	100%

Producent	STMICROELECTRONICS [STMicroelectronics]

Strona internetowa	http://www.st.com

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15 / 20 page

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

NE55

VCC

51k

22k

0.01

μF

VCC

0.01

μF

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