SA555DT Datasheet, PDF (11/20 Pages) STMicroelectronics – General-purpose single bipolar timers

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, R_L = 1kΩ
Figure 17. Free running frequency versus R₁, R₂ and C₁
C
(μF)
10
1.0
0.1
0.01
R1
+
R2
=
1M_Ω^100k1_Ω^0kΩ1kΩ
10M_Ω
0.001
0.1
1
10 100 1k 10k f_o(Hz)
Doc ID 2182 Rev 6
11/20