NE555P: Precision timer, microseconds to hours, TTL-compatible, up to 200 mA output
Texas Instruments

The NE555P is a highly versatile timer IC capable of producing accurate time delays or oscillation. In the time-delay (monostable) mode, the duration of the output pulse is determined by an external resistor and capacitor. For astable operation, the oscillation frequency and duty cycle are set with two external resistors and a capacitor. This flexibility makes the NE555P suitable for a wide range of applications, from simple delay circuits to complex pulse generators.

Key features include an adjustable duty cycle, TTL-compatible output capable of sinking or sourcing up to 200 mA, and operation over a supply voltage range of 5 V to 15 V. The control voltage terminal allows for fine-tuning of the threshold and trigger levels, enhancing the IC's adaptability to different circuit configurations. The output state can be directly controlled via the reset input, overriding all other inputs for immediate response to changing conditions.

Key Specifications and Features

  • Timing Range: Microseconds to hours
  • Operation Modes: Astable or Monostable
  • Duty Cycle: Adjustable
  • Output Current: Up to 200 mA, TTL-compatible
  • Supply Voltage Range: 5 V to 15 V
  • Threshold and Trigger Levels: Adjustable via control voltage terminal
  • Reset Input: Direct control of output state

NE555P Substitutes
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General information

Precision timers like the NE555P are fundamental components in electronic circuits, enabling controlled timing of operations, from microseconds to hours. They can operate in either monostable mode, where they produce a single time-delayed output pulse, or astable mode, for continuous oscillation.

When selecting a precision timer, key considerations include timing range, output current capability, supply voltage range, and compatibility with logic levels of the circuit. The NE555P's adjustable duty cycle and TTL-compatible output make it a versatile choice for a broad array of applications. Its ability to source or sink up to 200 mA allows direct driving of many output devices or logic circuits, further broadening its utility.

The NE555P's operation is straightforward, relying on external resistors and capacitors to set the timing parameters. This simplicity, combined with its robust output capabilities, makes it an essential tool for designers needing reliable and adjustable timing functions. Whether for simple delay circuits, pulse generation, or more complex timing arrangements, the NE555P offers a reliable and flexible solution.

Given its wide operating voltage range and the ability to fine-tune trigger and threshold levels, the NE555P accommodates various power supplies and logic levels, making it adaptable to numerous electronic designs. Its long-standing presence in the industry underscores its reliability and effectiveness in a multitude of timing applications.

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