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Philips Semiconductors Linear Products Product specification 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 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. PIN CONFIGURATIONS D, N, FE Packages GND 1 TRIGGER 2 OUTPUT 3 RESET 4 8 7 6 5 VCC DISCHARGE THRESHOLD CONTROL VOLTAGE FEATURES F Package GND 1 NC 2 TRIGGER 3 OUTPUT 4 NC 5 RESET 6 NC 7 14 13 12 11 10 9 8 VCC NC DISCHARGE NC THRESHOLD NC CONTROL VOLTAGE · Turn-off time less than 2µs · Max. operating frequency greater than 500kHz · 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 TOP VIEW · Precision timing · Pulse generation · Sequential timing · Time delay generation · Pulse width modulation ORDERING INFORMATION DESCRIPTION 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 Small Outline (SO) Package 8-Pin Hermetic Ceramic Dual In-Line Package (CERDIP) 8-Pin Plastic Dual In-Line Package (DIP) 14-Pin Plastic Dual In-Line Package (DIP) 8-Pin Hermetic Cerdip 14-Pin Ceramic Dual In-Line Package (CERDIP) 14-Pin Ceramic Dual In-Line Package (CERDIP) 14-Pin Ceramic Dual In-Line Package (CERDIP) 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 -55°C to +125°C -55°C to +125°C 0 to +70°C -55°C to +125°C -55°C to +125°C ORDER CODE NE555D NE555N SA555N SA555D SE555CFE SE555CN SE555N SE555FE NE555F SE555F SE555CF 0581B 0581B 0581B 0404B 0405B DWG # 0174C 0404B 0404B 0174C August 31, 1994 346 853-0036 13721 Philips Semiconductors Linear Products Product specification Timer NE/SA/SE555/SE555C BLOCK DIAGRAM VCC 8 R THRESHOLD 6 CONTROL VOLTAGE 5 COMPARATOR R TRIGGER COMPARATOR R 2 DISCHARGE 7 FLIP FLOP RESET 4 OUTPUT STAGE 3 OUTPUT GND 1 EQUIVALENT SCHEMATIC FM CONTROL VOLTAGE VCC R1 4.7K R2 330 R3 4.7 K R 4 1 K Q9 Q22 Q8 Q19 R13 3.9K R 7 5 K R12 6.8K Q21 Q5 Q6 Q7 Q1 THRESHOLD Q2 Q3 Q4 R1 0 82. K C CB Q18 E R11 4.7K Q17 Q16 OUTPUT Q23 B R5 10 K Q10 TRIGGER Q25 RESET DISCHARGE Q14 GND R16 100 R6 100K Q11 Q12 Q13 R8 5K Q20 R14 220 Q24 R15 4.7K Q15 R9 5K NOTE: Pin numbers are for 8-Pin package August 31, 1994 347 Philips Semiconductors Linear Products Product specification Timer NE/SA/SE555/SE555C ABSOLUTE MAXIMUM RATINGS SYMBOL Supply voltage VCC PD TA SE555 NE555, SE555C, SA555 Maximum allowable power dissipation1 Operating ambient