This is a common NE555 Timer/oscillator from TI. A classic for all of those first year circuits projects where you need to blink an LED, generate tone, and thousands of other great beginning projects. for a huge list of resources and example projects.This IC provides a highly accurate 555 Timer circuit that is capable of producing both time delays or oscillation. It is in a single 8 pin DIL package and can be operated in astable or monostable mode with external (RC) timing control.The 555 timer is a simple circuit. By taking the trigger signal from high to low the flip-flop is set. This causes the output to go high and the discharge pin to be released from GND (0V). g.

FEATURES of NE555 Timer

• 4.5V to 16V supply
• 8-pin DIP package
• Timing from microseconds to hours
• Astable or monostable operation
• Adjustable duty cycle
• TTL compatible output
• Sink or source up to 200mA• Timing From Microseconds to Hours
  producing accurate time delays or oscillation. In the
  • Astable or Monostable Operation time-delay or mono-stable mode of operation, the
  • Adjustable Duty Cycle timed interval is controlled by a single external
  • TTL-Compatible Output Can Sink or Source resistor and capacitor network. In the a-stable mode