Adafruit
16 MHz Crystal + 20pF capacitors
A 16.000 MHz quartz crystal in the HC49/US short-style package, supplied with two 20pF load capacitors. The crystal provides higher precision than ceramic re...
Get notified when back in stock
A 16.000 MHz quartz crystal in the HC49/US short-style package, supplied with two 20pF load capacitors. The crystal provides higher precision than ceramic resonators, with 30 PPM tolerance and 50 PPM stability — suitable for USB timing, long-term timekeeping, and RF/PLL/VCO applications.
The breadboard-friendly package has two pins with symmetric pinout. Connect one pin to XTAL-in and the other to XTAL-out on your microcontroller, with one 20pF capacitor from each crystal pin to ground. Check your microcontroller datasheet for any additional components (e.g. a 1 MΩ feedback resistor).
Specifications
- Frequency – 16.000 MHz
- Tolerance – ±30 PPM
- Stability – ±50 PPM
- Package – HC49/US (short style)
- Load Capacitance – 20pF (capacitors included)
Ideal For
- Arduino-compatible builds requiring precise 16 MHz clocking
- USB timing on ATmega32U4 and similar MCUs
- Applications requiring higher precision than ceramic resonators
Package Contents
- 1× 16 MHz quartz crystal (HC49/US)
- 2× 20pF ceramic capacitors
Jargon buster
Plain-language definitions for the technical terms used above.
- 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.
- 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.
- RF
- RF means radio frequency, referring to signals used for wireless communication and other high-frequency electronics. A low-noise, stable power supply is important for RF circuits because power noise can affect signal quality and measurements.
- 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.
Find this product in
Circuitry & IOT
Related Tutorials
Free guides on learn.littlebird.com.au
