GENERAL PURPOSE DUAL BIPOLAR TIMERS

The NE556 dual monolithic Timing circuit is a high- ly 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 fre- quency and the duty cycle are both accurately controlled with two external resistors and one ca- pacitor. The circuit may be triggered and reset on falling waveforms, and the output structure CAN source or sink up to 200mA. By STMicroelectronics