Document
INTEGRATED CIRCUITS
NE/SA/SE555/SE555C Timer
Product data Supersedes data of 1994 Aug 31
Philips Semiconductors
2003 Feb 14
Philips Semiconductors
Timer
Product data
NE/SA/SE555/SE555C
DESCRIPTION
The 555 monolithic timing circuit is a highly stable controller capable of producing accurate time delays, or oscillation. In the time delay mode of 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 200 mA.
FEATURES
• Turn-off time less than 2 µs • Max. operating frequency greater than 500 kHz • Timing from microseconds to hours • Operates in both astable and monostable modes • High output current • Adjustable duty cycle • TTL compatible • Temperature stability of 0.005% per °C
APPLICATIONS
• Precision timing • Pulse generation • Sequential timing • Time delay generation • Pulse width modulation
PIN CONFIGURATION
D and N Packages
GND 1 TRIGGER 2 OUTPUT 3
RESET 4
8 VCC 7 DISCHARGE 6 THRESHOLD 5 CONTROL VOLTAGE
SL00349
Figure 1. Pin configuration
BLOCK DIAGRAM
VCC 8
R THRESHOLD 6 COMPARATOR
5 CONTROL VOLTAGE
R COMPARATOR R
2 TRIGGER
7 DISCHARGE
FLIP FLOP
4 RESET
ORDERING INFORMATION
DESCRIPTION 8-Pin Plastic Small Outline (SO) Package 8-Pin Plastic Dual In-Line Package (DIP) 8-Pin Plastic Small Outline (SO) Package 8-Pin Plastic Dual In-Line Package (DIP) 8-Pin Plastic Dual In-Line Package (DIP) 8-Pin Plastic Dual In-Line Package (DIP)
OUTPUT STAGE
3 OUTPUT
1 GND
Figure 2. Block Diagram
SL00350
TEMPERATURE RANGE 0 to +70 °C 0 to +70 °C
–40 °C to +85 °C –40 °C to +85 °C –55 °C to +125 °C –55 °C to +125 °C
ORDER CODE NE555D NE555N SA555D SA555N SE555CN SE555N
DWG # SOT96-1 SOT97-1 SOT96-1 SOT97-1 SOT97-1 SOT97-1
2003 Feb 14
2
Philips Semiconductors
Timer
Product data
NE/SA/SE555/SE555C
EQUIVALENT SCHEMATIC
VCC Q5
R1 4.7 kΩ
R2 330 Ω
Q6 Q7
R3 4.7 kΩ
R4 1 kΩ
Q9 Q8
FM CONTROL VOLTAGE
R7 5 kΩ
R12 6.8 kΩ
Q21
Q22 Q19 R13
3.9 kΩ
THRESHOLD
TRIGGER RESET
DISCHARGE GND
Q1 Q2 Q3
Q4
R5 10 kΩ
Q11 Q12
R8 5 kΩ
Q10 Q13
Q25
Q14
R6 100 kΩ
R9 5 kΩ
R16 100 Ω
R10 82 kΩ
CB Q18
E
R11 4.7 kΩ
Q23 CB
Q20
OUTPUT
Q16 Q15
Q17
R14 220 Ω
Q24
R15 4.7 kΩ
NOTE: Pin numbers are for 8-Pin package
Figure 3. Equivalent schematic
SL00351
ABSOLUTE MAXIMUM RATINGS
SYMBOL
PARAMETER
RATING
Supply voltage
VCC SE555 NE555, SE555C, SA555
+18 +16
PD Tamb
Maximum allowable power dissipation1
Operating ambient temperature range NE555 SA555 SE555, SE555C
600
0 to +70 –40 to +85 –55 to +125
Tstg Storage temperature range
–65 to +150
TSOLD
Lead soldering temperature (10 sec max)
+230
NOTE:
1. The junction temperature must be kept below 125 °C for the D package and below 150°C for the N package. At ambient temperatures above 25 °C, where this limit would be derated by the following factors: D package 160 °C/W N package 100 °C/W
UNIT
V V mW
°C °C °C °C °C
2003 Feb 14
3
Philips Semiconductors
Timer
Product data
NE/SA/SE555/SE555C
DC AND AC ELECTRICAL CHARACTERISTICS
Tamb = 25 °C, VCC = +5 V to +15 V unless otherwise specified.
SYMBOL
PARAMETER
TEST CONDITIONS
SE555
NE555/SA555/SE555C
Min Typ Max Min Typ Max
UNIT
VCC ICC
tM ∆tM/∆T ∆tM/∆VS
tA ∆tA/∆T ∆tA/∆VS VC
VTH ITH VTRIG ITRIG VRESET IRESET
Supply voltage
Supply current (low state)1
Timing error (monostable) Initial accuracy2 Drift with temperature Drift with supply voltage
Timing error (astable) Initial accuracy2 Drift with temperature Drift with supply voltage
Control voltage level
Threshold voltage
Threshold current3
Trigger voltage
Trigger current Reset voltage4 Reset current Reset current
VOL LOW-level output voltage
VOH HIGH-level output voltage
tOFF Turn-off time5 tR Rise time of output tF Fall time of output
Discharge leakage current
VCC = 5 V, RL = ∞ VCC = 15 V, RL = ∞ RA = 2 kΩ to 100 kΩ
C=0.1 µF
RA, RB = 1 kΩ to 100 kΩ C = 0.1 µF VCC = 15 V
VCC = 15 V VCC = 5 V VCC = 15 V VCC = 5 V
VCC = 15 V VCC = 5 V VTRIG = 0 V VCC = 15 V, VTH = 10.5 V VRESET = 0.4 V VRESET = 0 V VCC = 15 V ISINK = 10 mA ISINK = 50 mA ISINK = 100 mA ISINK = 200 mA VCC = 5 V ISINK = 8 mA ISINK = 5 mA VCC = 15 V ISOURCE = 200 mA ISOURCE = 100 mA VCC = 5 V ISOURCE = 100 mA VRESET = VCC
4.5 18 4.5
35 10 12
3 10
0.5 2.0 30 100 0.05 0.2
1.0 50 0.1
46 500
0.15 0.6
5 0.3
9.6 10.0 10.4 9.0 10.0 2.9 3.33 3.8 2.6 3.33
9.4 10.0 10.6 8.8 10.0 2.7 3.33 4.0 2.4 3.33
0.1 0.25
0.1
4.8 5.0 1.45 1.67
5.2 1.9
4.5 5.0 1.1 1.67
0.5 0.9
0.5
0.3 1.0 0.3
0.1 0.4 0.4 1.0
0.1 0.4
0.1 0.15 0.4 0.5 2.0 2.2 2.5
0.1 0.4 2.0 2.5
0.1 0.25 0.05 0.2
0.3 0.25
12.5 13.0 13.3
12.5 12.75 13.3
3.0 3.3
2.75 3.3
0.5 2.0
0.5
100 200
100
100 200
100
20 100
20
16 V 6 mA 15 mA
3.0 % 150 ppm/°C 0.5 %/V
13 % 500 ppm/°C
1 %/V 11.0 V 4.0 V 11.2 V 4.2 V.