NE555 查看數據表（PDF） - STMicroelectronics

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NE555

General-purpose single bipolar timers

STMicroelectronics 

NE555 - SA555 - SE555

Figure 16. Waveforms in astable operation

t = 0.5 ms / div

OUTPUT VOLTAGE = 5.0V/div

Application information

CAPACITOR VOLTAGE = 1.0V/div

R1 = R2 = 4.8kΩ, C1= 0.1μF, RL = 1kΩ

Figure 17. Free running frequency versus R1, R2 and C1

C

(μF)

10

1.0

0.1

0.01

R1

+

R2

=

1MΩ100k1Ω0kΩ1kΩ

10MΩ

0.001

0.1

1

10 100 1k 10k fo(Hz)

Doc ID 2182 Rev 6

11/20

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