SparkFun
555 Timer
The classic 555 timer/oscillator IC from Texas Instruments — one of the most versatile and widely used integrated circuits in electronics. With just a few ex...
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The classic 555 timer/oscillator IC from Texas Instruments — one of the most versatile and widely used integrated circuits in electronics. With just a few external resistors and capacitors, it can generate timing delays from microseconds to hours, produce square wave oscillations, and drive LEDs, buzzers, or relays directly from its output.
Key Features
- Wide Supply Range – 4.5V to 16V operation
- Astable & Monostable Modes – Oscillator or one-shot pulse operation
- Adjustable Duty Cycle – Control on/off timing with external components
- 200mA Output – Source or sink current, TTL compatible
- Timing Range – Microseconds to hours
- 8-Pin DIP Package – Breadboard and perfboard friendly
Specifications
- Supply Voltage: 4.5–16V
- Output Current: 200mA source/sink
- Max Frequency: 100kHz
- Package: PDIP-8
- Manufacturer: Texas Instruments
Ideal For
- LED blinker and flasher circuits
- Tone and sound generation
- PWM and motor speed control
- Timing delays and pulse generation
- First-year electronics and STEM projects
Package Contents
- 1× 555 Timer IC (PDIP-8)
Resources
Jargon buster
Plain-language definitions for the technical terms used above.
- duty cycle
- The fraction of time a signal or power source is switched on during each repeating on/off cycle, usually given as a percentage. It is central to PWM (pulse-width modulation), where adjusting the duty cycle controls things like LED brightness, motor speed or heater power, and on devices such as proximity sensors it can also affect detection range, response speed, accuracy and power use.
- LED
- A light-emitting diode (LED) is a small electronic component that emits light when current flows through it in the correct direction. Because it only conducts one way, its polarity matters, and a through-hole LED must be soldered the correct way around to light up.
- PWM
- Pulse Width Modulation is a way for a digital pin to simulate variable output power by switching on and off very quickly. It matters for controlling things like LED brightness, motor speed, or servo-style signals from a microcontroller pin.
Find this product in
Brands
Ne555
Datasheet · 1.5 MB · Click any page to view full size
555 Timer Datasheet
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Supplier page — sparkfun.com
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Related Tutorials
Free guides on learn.littlebird.com.au
