Adafruit
12 MHz Crystal + 20pF capacitors
A 12.000MHz quartz crystal in a standard HC49/US short-style package with two 20pF load capacitors included. The crystal has 30PPM tolerance and 50PPM stabil...
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A 12.000MHz quartz crystal in a standard HC49/US short-style package with two 20pF load capacitors included. The crystal has 30PPM tolerance and 50PPM stability, making it precise enough for USB timing, long-term timekeeping, and RF/PLL/VCO applications. The breadboard-friendly package works with any microcontroller that requires an external crystal.
To use, connect the two pins to XTAL-in and XTAL-out on your microcontroller (the package is symmetric, so either pin works) and place one 20pF capacitor from each crystal pin to ground. Check your microcontroller datasheet for any additional components such as a 1MΩ feedback resistor.
Key Features
- 12.000MHz Frequency – Precision quartz crystal
- 30PPM Tolerance, 50PPM Stability – Suitable for USB and high-precision timing
- HC49/US Short Package – Standard, breadboard-friendly form factor
- Includes 20pF Capacitors – Two load capacitors included
Ideal For
- USB-capable microcontroller circuits
- Real-time clock and timekeeping applications
- RF, PLL, and VCO driving circuits
- Breadboard prototyping with AVR, PIC, and ARM microcontrollers
Package Contents
- 1× 12MHz quartz crystal (HC49/US)
- 2× 20pF ceramic capacitors
Jargon buster
Plain-language definitions for the technical terms used above.
- AVR
- AVR is a family of 8-bit microcontrollers (made by Microchip, formerly Atmel) used in many classic Arduino-style boards such as the Uno and Nano. They are widely supported but older, which can be a limit for memory- or speed-intensive tasks.
- 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.
- 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.
Related Tutorials
Free guides on learn.littlebird.com.au
