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Спецификация NE555 изготовлена «ESTEK» и имеет функцию, называемую «Monolithic timing circuits». |
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Детали детали
Номер произв | NE555 |
Описание | Monolithic timing circuits |
Производители | ESTEK |
логотип |
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NE555
Description
These devices are monolithic timing circuits capable of producing accurate time delays or oscillation.
Inthe time delay mode of operation, the timed interval is controll ed by a single external resistor and capacit
or netw ork. In the astable mode of operation, the frequency and duty cy cle may be independently
controlled wi th two external resistors and a si ngle external capacitor.
Features
• Timing from Microseconds to Hours
• Astable or Monostable Operation
• Adjustable Duty Cycle
• TTL - Compatible Output Can Sink or Source Up to 200 mA
• Temperature Stability of 0.005% per oC
• Direct Replacement for Signetics NE555 Timer
Applications
• Precision timing
• Pulse generation
• Sequential timing
• Time delay generation
• Pulse w idth modulation
• Pulse position modulation
• Missing pulse detector
Pin Configuration
TOP VIEW
DIP-8
SOP-8
P ack age
Internal Block Digram
RESET can override TRIGGER, which can override THRESHOLD
BEIJING ESTEK ELECTRONICS CO.,LTD
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NE555
Absolute Maximum Ratings
(TA=25°C, unless otherwise specified)
Parameter
Supply Voltage, VCC
Input Voltage (control, reset, threshold and trigger)
Output Current, I0
Operating Free-Air Temperature, TA
Storage Temperature Range, TSTG
Min Max Units
4.5 16
V
VCC
±200
mA
70 °C
-65 +150
Electrical characteristics
(TA=25°C, VCC=+5V to +15V, unless otherwise specified)
Parameter
Test conditions (Note 2)
Operating Supply Voltage Range
Min Typ Max Units
4.5 16 V
Threshold Voltage Level
Threshold Current (Note 1)
VCC=15V
VCC=5V
(see Note 1)
8.8 10 11.2
V
2.4 3.3 4.2
30 250
nA
Trigger Voltage Level
Trigger Current
VCC=15V
VCC=5V
Trigger at 0V
4.5 5 5.6
1.1 1.67 2.2
0.5 2
V
µA
Reset Voltage Level
0.3 0.7 1
V
Reset Current
Discharge Leakage Current
Reset at VCC
Reset at 0V
0.1 0.4
-0.4 -1.5
20 100
mA
nA
Control Voltage Level
Low-level Output Voltage
High-level Output Voltage
Supply Current
Initial Error of
Timing Interval (Note 3)
VCC=15V
VCC=5V
VCC=15V
monostable
(Note 4)
astable
(Note 5)
VCC=5V
VCC=15V
VCC=5V
Output Low,
No Load
Output High,
No Load
TA=25°C
IOL=10mA
IOL=50mA
IOL=100mA
IOL=200mA
IOL=5mA
IOL=8mA
IOL=-100mA
IOL=-200mA
IOL=-100mA
VCC=15V
VCC=5V
VCC=15V
VCC=5V
9
2.6
12.75
2.75
10
3.3
0.1
0.4
2
2.5
0.25
0.3
13.3
12.5
3.3
10
3
9
2
1
5
11
4
0.25
0.75
2.5
0.35
0.4
15
6
13
5
3
13
V
mA
%
Temperature Coefficient
of Timing Interval
Supply Voltage Sensitivity of
Timing Interval
Output Pulse Rise Time
Output Pulse Fall Time
monostable
astable
monostable
astable
TA=MIN to MAX
TA=25°C
CL=15pF, TA=25°C
50 150 ppm /°C
150 500
0.1 0.5
%/V
0.3 1
100 300
ns
100 300
Note 1: This parameter influences the maximum value of the timing resistors RA and RB in the circuit on Fig 1. For example, when
VCC=5V, the maximum value is R=RA+RB=3.4 MΩ, and VCC=15V, the maximum value is 10 MΩ.
Note 2: For conditions shown as MIN or MAX, use the appropriate value specified under recommended operating conditions.
Note 3: Timing interval error is defined as the difference between the measured value and the average value of a random sample from
each process run.
Note 4: Values specified are for a device in a monostable circuit similar to Fig. 2, with component values as follow: RA=2KΩ to 100 KΩ,
C=0.1µF.
Note 5: Values specified are for a device in an astable circuit similar to Fig. 1, with component values as follow: RA, RB=1KΩ to 100 KΩ,
C=0.1µF.
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Function Table
Reset
Low
High
High
High
Trigger Voltage *
Irrelevant
< 1/3 VCC
> 1/3 VCC
> 1/3 VCC
* Voltage levels shown are nominal
Threshold Voltage *
Irrelevant
High
> 2/3 VCC
< 2/3 VCC
Typical Applications Circuit
NE555
Output
Discharge Switch
Low On
High
Off
Low On
As previously established
Figure 1 Circuit for astable operation
Figure 2. Circuit for monostable operation
NOTE A: Bypassing the control voltage input to ground with a capacitor may improve operation. This should be evaluated
applications.
for individual
Ordering Information
O RDERING NUM BER
NE555
P ACK AG E
DIP - 8 / SOP - 8
MARKING
NE555
Address :
6A06--6A07
Rm 6A07,Changyin Office Building ,No.88,Yong Ding Road,Hai Dian District ,Beijing
Postalcode:100039
Tel: 86-010-58895780 / 81 / 82 / 83 / 84 Fax : 010-58895793
Http://www.estek.com.cn
Email:[email protected]
REV No:01-060823
BEIJING ESTEK ELECTRONICS CO.,LTD
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