NE555D-TR STMicroelectronics, NE555D-TR Datasheet - Page 10

• Manufacturer Part Number: NE555D-TR
• Manufacturer: STMicroelectronics
• Type: Standardr

Specifications of NE555D-TR

• # Internal Timers: 1
• Operating Supply Voltage (min): 4.5V
• Operating Supply Voltage (typ): 5/9/12/15V
• Operating Supply Voltage (max): 16V
• Package Type: SO
• High Level Output Current: -200mA
• Low Level Output Current: 200mA
• Pin Count: 8
• Operating Temp Range: 0C to 70C
• Operating Temperature Classification: Commercial
• Mounting: Surface Mount
• Lead Free Status / RoHS Status: Compliant

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