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NE555 Datasheet(PDF) 4 Page - STMicroelectronics

Part No. NE555
Description  GENERAL PURPOSE SINGLE BIPOLAR TIMERS
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Maker  STMICROELECTRONICS [STMicroelectronics]
Homepage  http://www.st.com
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 4 page
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ELECTRICAL CHARACTERISTICS (continued)
Symbol
Parameter
SE555
NE555 - SA555
Unit
Min.
Typ.
Max.
Min.
Typ.
Max.
Idis(off)
Discharge Pin Leakage Current
(output high) (Vdis = 10V)
20
100
20
100
nA
Vdis(sat)
Discharge pin Saturation Voltage
(output low) - (note 5)
VCC = +15V, Idis = 15mA
VCC = +5V, Idis = 4.5mA
180
80
480
200
180
80
480
200
mV
tr
tf
Output Rise Time
Output Fall Time
100
100
200
200
100
100
300
300
ns
toff
Turn off Time - (note 6) (Vreset =VCC)
0.5
0.5
µs
Notes :
5. No protection against excessive Pin 7 current is necessary, providing the package dissipation rating will not be exceeded.
6. Time mesaured from a positive going input pulse from 0 to 0.8x VCC into the threshold to the drop from high to low of the
output trigger is tied to treshold.
Figure 1 : Minimum Pulse Width Required for
Trigering
Figure 2 : Supply Current versus Supply Voltage
Figure 3 : Delay Time versus Temperature
Figure 4 : Low Output Voltage versus Output
Sink Current
NE555/SA555/SE555
4/10




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