sa555d-dt STMicroelectronics, sa555d-dt Datasheet - Page 10

• Manufacturer Part Number: sa555d-dt
• Description: General Purpose Single Bipolar Timers
• Manufacturer: STMicroelectronics

Application information
4.2
10/20
Figure 13. Waveforms in monostable operation
Figure 14. Pulse duration versus R1C1
Astable operation
When the circuit is connected as shown in
and free runs as a multi-vibrator. The external capacitor charges through R
discharges through R
of these two resistors.
In the astable mode of operation, C
As in the triggered mode, the charge and discharge times and, therefore, frequency are
independent of the supply voltage.
0.001
2
0.01
(μF)
0.1
1.0
10
only. Thus the duty cycle can be set accurately by adjusting the ratio
C
10
μs
t = 0.1 ms / div
OUTPUT VOLTAGE = 5.0V/div
CAPACITOR VOLTAGE = 2.0V/div
INPUT = 2.0V/div
R1 = 9.1kΩ, C1 = 0.01μF, R = 1kΩ
100
μs
1
charges and discharges between 1/3 V
1.0
ms
Figure 15
ms
10
100
ms
L
(pin 2 and 6 connected) it triggers itself
10
s
(t )
d
NE555 - SA555 - SE555
1
CC
and R
and 2/3 V
2
and
CC
.