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Ic 555

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IC 555

General Description The LM555 is a highly stable device for generating accurate time delays or oscillation. Additional terminals are provided for triggering or resetting if desired. In the time delay mode of operation, the time is precisely controlled by one external resistor and capacitor. For astable operation as an oscillator, the free running fre uency and duty cycle are accurately controlled !ith t!o external resistors and one capacitor. The circuit may be triggered and reset on falling !aveforms, and the output circuit can source or sin" up to #$$mA or drive TTL circuits. Features %irect replacement for &'555()'555

Timing from microseconds through hours *perates in both astable and monostable modes Ad+ustable duty cycle *utput can source or sin" #$$ mA *utput and supply TTL compatible Temperature stability better than $.$$5, per -. )ormally on and normally off output Available in /0pin M&*1 pac"age

Applications 1recision timing 1ulse generation &e uential timing Time delay generation 1ulse !idth modulation 1ulse position modulation Linear ramp generator

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