Estudio del ne555

July 1998
®
N
DIP8
(Plastic Package)
D
SO8
(Plastic Micropackage)
1
2
3
4 5
6
7
8 1 - GND
2 - Trigger
3 - Output
4 - Reset
5 - Control voltage
6 - Threshold
7 - Discharge
8 - VCC
PIN CONNECTIONS (top view)
..LOW TURN OFF TIME MAXIMUM OPERATING FREQUENCY
.GREATER THAN 500kHz .TIMING FROM MICROSECONDS TO HOURS OPERATES IN BOTH ASTABLE AND
.MONOSTABLE MODES HIGH OUTPUTCURRENT CAN SOURCE OR
.SINK 200mA .ADJUSTABLE DUTY CYCLE .TTL COMPATIBLE TEMPERATURE STABILITY OF 0.005%
PERoC
ORDER CODES
Part
Number
Temperature
Range
Package
N D
NE555 0oC, 70oC · ·
SA555 –40oC, 105oC · ·
SE555 –55oC, 125oC · ·
DESCRIPTION
The NE555 monolithic timing circuit is a highly stable
controller capable of producing accurate time delays
or oscillation. In the time delay modeof operation,
the time is precisely controlled by one external resistor
and capacitor. For a stable operation as an oscillator,
the free running frequency and the duty cycle
are both accurately controlled with two external
resistors and one capacitor. The circuit may be triggered
and reset on falling waveforms, and the output
structure can source or sink up to 200mA. The
NE555 isavailable in plastic and ceramic minidip
package and in a 8-lead micropackage and in metal
can package version.
NE555
SA555 - SE555
GENERAL PURPOSE SINGLE BIPOLAR TIMERS
1/10
THRESHOLD
COMP
5kW
5kW
5kW
TRIGGER
R
FLIP-FLOP
S
Q
DISCHARGE
OUT
INHIBIT/
RESET
RESET
COMP
S - 8086
S
+
CONTROL VOLTAGE
VCC
BLOCK DIAGRAM
OUTPUT
CONTROL
VOLTAGE
THRESHOLD
COMPARATOR
VCC
R1
4.7kWR2
830W
Q5 Q6 Q7 Q8 Q9
R3
4.7kW
R4
1kW
R8
5kW
Q1
Q2 Q3
Q4
Q10
Q11 Q12
Q13
THRESHOLD
TRIGGER
RESET
DISCHARGE
G N D
2
4
7
1
Q14
Q15
R5
10kW
R6
100kW
R7
100kW
R10
5kW
Q17
Q16 Q18
R9
5kW D2
R16
100W
R15
4.7kW
R14
220W
Q24
Q23
R17
4.7kW
3
Q22
R13
D1
Q19
Q20
Q21
R12
6.8kW
5
TRIGGER COMPARATOR FLIP FLOP
R11
5kW
3.9kW
SCHEMATIC DIAGRAM
ABSOLUTEMAXIMUM RATINGS
Symbol Parameter Value Unit
Vcc Supply Voltage 18 V
Toper Operating Free Air Temperature Range for NE555
for SA555
for SE555
0 to 70
–40 to 105
–55 to 125
oC
Tj Junction Temperature 150 oC
Tstg Storage Temperature Range –65 to 150 oC
NE555/SA555/SE555
2/10
ELECTRICAL CHARACTERISTICS
Tamb = +25oC, VCC = +5V to +15V (unless otherwise specified)
Symbol ParameterSE555 NE555 - SA555
Unit
Min. Typ. Max. Min. Typ. Max.
ICC Supply Current (RL ¥) (- note 1)
Low State VCC = +5V
VCC = +15V
High State VCC = 5V
3
10
2
5
12
3
10
2
6
15
mA
Timing Error (monostable)
(RA = 2k to 100kW, C = 0.1mF)
Initial Accuracy - (note 2)
Drift with Temperature
Drift with Supply Voltage
0.5
30
0.05
2
100
0.2
1
50
0.1
3
0.5
%
ppm/°C
%/V
Timing Error(astable)
(RA, RB = 1kW to 100kW, C = 0.1mF,
VCC = +15V)
Initial Accuracy - (note 2)
Drift with Temperature
Drift with Supply Voltage
1.5
90
0.15
2.25
150
0.3
%
ppm/°C
%/V
VCL Control Voltage level
VCC = +15V
VCC = +5V
9.6
2.9
10
3.33
10.4
3.8
9
2.6
10
3.33
11
4
V
Vth Threshold Voltage
VCC = +15V
VCC = +5V
9.4
2.7
10
3.33
10.6
4
8.8
2.4
10
3.33
11.2
4.2V
Ith Threshold Current - (note 3) 0.1 0.25 0.1 0.25 mA
Vtrig Trigger Voltage
VCC = +15V
VCC = +5V
4.8
1.45
5
1.67
5.2
1.9
4.5
1.1
5
1.67
5.6
2.2
V
Itrig Trigger Current (Vtrig = 0V) 0.5 0.9 0.5 2.0 mA
Vreset Reset Voltage - (note 4) 0.4 0.7 1 0.4 0.7 1 V
Ireset Reset Current
Vreset = +0.4V
Vreset = 0V
0.1
0.4
0.4
1
0.1
0.4
0.4
1.5
mA
VOL Low Level Output VoltageVCC = +15V, IO(sink) = 10mA
IO(sink) = 50mA
IO(sink) = 100mA
IO(sink) = 200mA
VCC = +5V, IO(sink) = 8mA
IO(sink) = 5mA
0.1
0.4
2
2.5
0.1
0.05
0.15
0.5
2.2
0.25
0.2
0.1
0.4
2
2.5
0.3
0.25
0.25
0.75
2.5
0.4
0.35
V
VOH High Level Output Voltage
VCC = +15V, IO(source) = 200mA
IO(source) = 100mA
VCC = +5V, IO(source) = 100mA
13
3
12.5
13.3
3.3
12.75
2.75
12.5...