SE555N STMicroelectronics, SE555N Datasheet - Page 10

• Manufacturer Part Number: SE555N
• Description: IC TIMER GP SGL BIPOLAR 8-DIP
• Manufacturer: STMicroelectronics
• Type: 555 Type, Timer/Oscillator (Single)r

Specifications of SE555N

• Frequency: 500kHz
• Voltage - Supply: 4.5 V ~ 16 V
• Current - Supply: 10mA
• Operating Temperature: -55°C ~ 125°C
• Package / Case: 8-DIP (0.300", 7.62mm)
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Count: -
• Other names: 497-7421-5; SE555N

Application information
10/20
Figure 15. Typical schematics in astable operation
Figure 16
The charge time (output HIGH) is given by:
and the discharge time (output LOW) by:
Thus the total period T is given by:
The frequency of oscillation is then:
It can easily be found from
The duty cycle is given by:
t1 = 0.693 (R
t2 = 0.693 (R
T = t1 + t2 = 0.693 (R1 + 2R2) C1
shows the actual waveforms generated in this mode of operation.
V
0.01
CC
Output
1
2
) C
+ R
= 5 to 15V
μ
F
1
2
) C
Voltage
Control
Figure
1
3
5
17.
f =
1
1
-- -
T
D
4
=
NE555
=
-------------------------------------- -
(
------------------------- -
R1
R1
R2
+
+
1.44
2R2
2R2
8
)C1
2
6
7
NE555 - SA555 - SE555
R2
R1
C1