The NE556 Timer dual monolithic timing circuit is a highly stable controller capable of producing accurate time delays or oscillation. In the time delay mode of op-eration, the time is precisely controlled by one exter-nal resistor and capacitor.

FEATURES ofNE556 Timer:

• Low turn off time.

• Maximum operating frequency greater than 500kHz.

• Timing from microseconds to hours.

• Operates in both astable and monostable modes.

• High output current can source or sink 200mA.

• Adjustable duty cycle.

• TTL compatible.

• Temperature stability of 0.005% per  ^oc.
• Supply Voltage(VCC):4.5 to 18V
• Maximum Input Voltage:VCC

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