Ci 555

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INTEGRATED CIRCUITS

NE/SA/SE555/SE555C Timer
Product data Supersedes data of 1994 Aug 31 2003 Feb 14

Philips Semiconductors

Philips Semiconductors

Product data

Timer

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 isprecisely 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.

PIN CONFIGURATION
D and N Packages
GND 1 TRIGGER 2OUTPUT 3 RESET 4 8 7 6 5 VCC DISCHARGE THRESHOLD CONTROL VOLTAGE

SL00349

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

Figure 1. Pin configurationBLOCK DIAGRAM
VCC 8

R 5 THRESHOLD 6
COMPARATOR

CONTROL VOLTAGE

R 2

• Precision timing • Pulse generation • Sequential timing • Time delay generation • Pulse width modulation

COMPARATOR R

TRIGGER

7 DISCHARGE FLIP FLOP 4 RESET

OUTPUT STAGE

3 OUTPUT

1 GND

SL00350

Figure 2. Block Diagram

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) 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 SOT97-1SOT96-1 SOT97-1 SOT97-1 SOT97-1

2003 Feb 14

2

Philips Semiconductors

Product data

Timer

NE/SA/SE555/SE555C

EQUIVALENT SCHEMATIC
FM CONTROL VOLTAGE VCC R1 4.7 kΩ R2 330 Ω R3 4.7 kΩ R4 1 kΩ R7 5 kΩ R12 6.8 kΩ Q21 Q5 Q6 Q7 Q8 Q9 Q22 Q19 R13 3.9 kΩ

THRESHOLD

Q1 Q2 Q3

Q4

R10 82 kΩ Q23 C B R8 5 kΩ Q11 Q12 CB Q18 E
R11 4.7 kΩ

OUTPUT

R5 10 kΩ TRIGGER RESET DISCHARGEQ14 GND Q25 R6 100 kΩ R16 100 Ω Q10

Q20 R14 220 Ω Q24 R15 4.7 kΩ

Q13 Q16 Q15 R9 5 kΩ

Q17

NOTE:

Pin numbers are for 8-Pin package

SL00351

Figure 3. Equivalent schematic

ABSOLUTE MAXIMUM RATINGS
SYMBOL VCC PD Supply voltage SE555 NE555, SE555C, SA555 Maximum allowable power dissipation1 Operating ambient temperature range NE555 SA555 SE555, SE555C Storage temperature rangeLead soldering temperature (10 sec max) PARAMETER RATING +18 +16 600 0 to +70 –40 to +85 –55 to +125 –65 to +150 +230 UNIT V V mW °C °C °C °C °C

Tamb

Tstg TSOLD

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 Npackage 100 °C/W

2003 Feb 14

3

Philips Semiconductors

Product data

Timer

NE/SA/SE555/SE555C

DC AND AC ELECTRICAL CHARACTERISTICS
Tamb = 25 °C, VCC = +5 V to +15 V unless otherwise specified. SYMBOL VCC ICC PARAMETER Supply voltage Su ly 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 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...
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