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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.
microcontroller
A microcontroller is a small computer on a chip that runs your program and controls connected inputs and outputs. For this product, it is the part that reads buttons and sensors, drives the display and speaker, and communicates over Bluetooth.
PCB
A printed circuit board is a rigid board with copper tracks that connect electronic parts without loose wires. For this kit, the PCBs also form the airplane shape, so they are both the circuit base and part of the finished model.
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.
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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