NE555 – Timer

Part Number : NE555

Function : Timer

Manufactures : Philipss

Images :

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NE555 image

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pinout

Description :

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 […]

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NE555 Datasheet


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