Overview
The NE555N is a highly stable and versatile monolithic timing circuit produced by STMicroelectronics. It is capable of producing accurate time delays or oscillation, making it a widely used component in various electronic applications. The NE555N operates in both astable and monostable modes, allowing it to generate single pulses or continuous waveforms with adjustable duty cycles. Its stability and precision are enhanced by its ability to be triggered and reset on falling waveforms, and it can source or sink up to 200 mA of current.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Package / Case | 8-DIP (0.300, 7.62mm) | |
| Number of Pins | 8 | |
| Mounting Type | Through Hole | |
| Supply Voltage - Min | 4.5 V | V |
| Supply Voltage - Max | 16 V | V |
| Operating Temperature | 0°C ~ 70°C | °C |
| Maximum Operating Frequency | > 500 kHz | Hz |
| Output Current | Up to 200 mA | mA |
Key Features
- Low turn-off time
- Maximum operating frequency greater than 500 kHz
- Timing from microseconds to hours
- Operates in both astable and monostable modes
- Output can source or sink up to 200 mA
- Adjustable duty cycle
- TTL compatible
- Temperature stability of 0.005% per °C
- Normally on and normally off output
Applications
- Precision timing
- Pulse generation
- Sequential timing
- Time delay generation
- Pulse width modulation
- Pulse position modulation
- Linear ramp generator
Q & A
- What does the NE555N timer IC do?
The NE555N timer IC is a precision timing device that can act as either a simple timer to generate single pulses or long time delays, or as a relaxation oscillator producing a string of stabilized waveforms of varying duty cycles.
- What are the operating modes of the NE555N?
The NE555N operates in both astable and monostable modes.
- What is the maximum operating frequency of the NE555N?
The maximum operating frequency of the NE555N is greater than 500 kHz.
- How much current can the NE555N output source or sink?
The NE555N can source or sink up to 200 mA of current.
- Is the NE555N TTL compatible?
Yes, the NE555N is TTL compatible.
- What is the temperature stability of the NE555N?
The temperature stability of the NE555N is 0.005% per °C.
- What are some common applications of the NE555N?
Common applications include precision timing, pulse generation, sequential timing, time delay generation, pulse width modulation, pulse position modulation, and linear ramp generation.
- How is the timing interval controlled in the NE555N?
In the monostable mode, the timing interval is controlled by one external resistor and capacitor. In the astable mode, it is controlled by two external resistors and one capacitor.
- What should be done with the reset pin if it is not used?
If the reset pin is not used, it should be tied high to avoid any possibility of unwanted triggering.
- Is the NE555N similar to other 555 timer ICs from different manufacturers?
Yes, the NE555N is essentially the same as other 555 timer ICs from different manufacturers, such as the LM555, but there may be slight variations in specifications.
