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Wing Shing Computer Components

NE555 Datasheet Preview

NE555 Datasheet

Precision Timer

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Precision Timer
NE555
Connection Diagram
SO-8 NE555M
FUNCTION TABLE
RESET TRIGGER
VOLTAGE
Low
High
High
High
Irrelevant
<1/3VDD
>1/3V DD
>1/3VDD
THRESHOLD
VOLTAGE
DISCHARGE
OUTPUT SWITCH
Irrelevant
High
>2/3VDD
<2/3V DD
Low
High
On
Off
Low
On
As previously established
DIP-8 NE555N
General Description
The NE555 is a highly stable device for generating accurate
time delays or oscillation. Additional terminals are provided
for triggering or resetting if desired. In the time delay mode of
operation, the time is precisely controlled by one external re-
sistor and capacitor. For astable operation as an oscillator,
the free running frequency and duty cycle are accurately
controlled with two external resistors and one capacitor. The
circuit may be triggered and reset on falling waveforms, and
the output circuit can source or sink up to 200mA or drive
TTL circuits.
Features
n Direct replacement for SE555/NE555
n Timing from microseconds through hours
n Operates in both astable and monostable modes
n Adjustable duty cycle
n Output can source or sink 200 mA
n Output and supply TTL compatible
n Normally on and normally off output
Applications
n Precision timing
n Pulse generation
n Sequential timing
n Time delay generation
n Pulse width modulation
n Pulse position modulation
n Linear ramp generator
Wing Shing Computer Components Co., (H.K.)Ltd.
Homepage: http://www.wingshing.com
Tel:(852)2341 9276 Fax:(852)2797 8153
E-mail: wsccltd@hkstar.com
1




Wing Shing Computer Components

NE555 Datasheet Preview

NE555 Datasheet

Precision Timer

No Preview Available !

NE555
ELECTRICAL CHARACTERISTICS
(TA = 25˚C, VCC = +5V to +15V, unless othewise specified)
Parameter
Conditions
Supply Voltage
Supply Current
Note 4
Timing Error, Monostable
Initial Accuracy
Drift with Temperature
Accuracy over Temperature
Drift with Supply
Timing Error, Astable
Initial Accuracy
Drift with Temperature
Accuracy over Temperature
Drift with Supply
Threshold Voltage
Trigger Voltage
Trigger Current
Reset Voltage
Reset Current
Threshold Current
Control Voltage Level
Pin 7 Leakage Output High
Pin 7 Sat (Note 7)
Output Low
Output Low
VCC = 5V, RL = OUTPUT LOW
VCC = 15V, RL = OUTPUT LOW
Vcc=5V,No load OUTPUT HIGH
Min
4.5
RA = 1k to 100k,
C = 0.1µF, (Note 5)
RA, RB = 1k to 100k,
C = 0.1µF, (Note 5)
VCC = 15V
VCC = 5V
Trigger at 0V
Reset at Vcc
(Note 6)
VCC = 15V
VCC = 5V
VCC = 15V, I7 = 15mA
VCC = 4.5V, I7 = 4.5mA
4.5
1.1
0.3
9
2.6
Limits
Typ
3
10
2
1
50
1.5
0.1
2.25
150
3.0
0.30
0.667
5
1.67
0.5
0.7
0.1
30
10
3.33
210
180
80
Max
16
6
15
5
3
0.5
5.6
2.2
2
1
0.4
250
11
4
100
200
Units
V
mA
%
ppm/˚C
%
%/V
%
ppm/˚C
%
%/V
x VCC
V
V
uA
V
mA
nA
V
nA
mV
mV
2


Part Number NE555
Description Precision Timer
Maker Wing Shing Computer Components
Total Page 5 Pages
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