Pimoroni
16 MHz Crystal Oscillator
$1.25
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A 16 MHz quartz crystal oscillator in the HC49/4H through-hole package. Provides an accurate timing signal for microcontrollers and digital circuits, and is ...
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A 16 MHz quartz crystal oscillator in the HC49/4H through-hole package. Provides an accurate timing signal for microcontrollers and digital circuits, and is ideal for ATmega328P-based projects where you want to take an Arduino Uno design to a permanent PCB.
External load capacitors (30pF) are required and not included — check your microcontroller datasheet for the recommended oscillator circuit.
Specifications
- Frequency – 16 MHz
- Frequency Tolerance – ±50 PPM
- Load Capacitance – 30pF
- ESR (max) – 40Ω
- Package – HC49/4H (through-hole)
Ideal For
- Permanent Arduino-compatible builds using ATmega328P
- Microcontroller clock source requiring accurate timing
- General-purpose digital circuit timing
Package Contents
- 1× 16 MHz crystal oscillator (HC49/4H)
Note: Load capacitors (30pF) are required but not included. See the 16 MHz Crystal + 20pF Capacitors if you need a crystal with capacitors included.
Jargon buster
Plain-language definitions for the technical terms used above.
- ATmega328P
- An 8-bit microcontroller chip used on many Arduino Uno-compatible boards. Knowing the controller uses an ATmega328P helps you understand its memory, speed, pin compatibility, and the Arduino sketches it can run.
- capacitance
- Capacitance is the amount of electrical charge a capacitor can store, usually measured in farads such as uF. Choosing the right capacitance value matters because it affects how well a circuit filters power, handles timing, or stores short bursts of energy.
- microcontroller
- A microcontroller is a small computer on a single chip that runs a stored program and controls connected inputs and outputs such as buttons, sensors, displays and communication interfaces. In a device built around one, it is the part that executes the code and coordinates the device's behaviour.
- PCB
- A printed circuit board (PCB) is a board, usually rigid, with etched copper tracks that connect electronic components together without loose wiring. Components are mounted on the board and signals route between them through the copper layout.
- ppm
- ppm means parts per million, a common way to express very small gas concentrations in air. For CO₂ sensors, the ppm range tells you what levels the sensor can measure, such as normal indoor air through to poorly ventilated spaces.
- through-hole
- A mounting style where the component leads pass through holes in a circuit board and are soldered on the other side. Through-hole parts are often easier to handle and solder by hand, which is useful for classroom and hobby projects.
- Tolerance
- Tolerance tells you how far the real resistance value may be from the printed value. A 1% resistor is useful when a circuit needs more predictable behaviour than a looser 5% or 10% part.
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