NE556

The NE556 integrates two general-purpose 555 timer circuits. These two timer circuits share a common power supply (VCC) and ground (GND), while all other circuitry and pins are independent of each other. Each timer circuit consists of six functional blocks: a threshold comparator, a trigger comparator, an RS flip-flop, a reset input, a discharge stage, and a trigger input. Each timer circuit can achieve precise timing or generate oscillating waveforms through external resistors and capacitors.

Applications

• Precision timing
• Pulse shaping, PWM, pulse phase modulation
• Pulse generators, audio pulse generators
• Delay generators, frequency dividers
• Industrial control
• Traffic signal control

Key features

• Dual independent universal timer circuits with excellent temperature stability
• High output current up to 200mA
• Supports astable and monostable operating modes
• Timing range from microseconds to hours
• Package: DIP14, SOP14