Crystal Oscillator – 16MHz
⏱️ Crystal Oscillator – 16MHz (HC-49S)
📝 Overview
The 16MHz Crystal Oscillator is a precision quartz crystal used to provide a stable clock signal in microcontroller and digital logic circuits. It’s widely used in Arduino boards (e.g. UNO, Nano), AVR microcontrollers, and timing-sensitive applications that require accurate and consistent frequency.
⚙️ Key Features
Stable frequency output: 16.000 MHz
Ideal for microcontrollers: Arduino, ATmega328, STM32
HC-49S standard package – compact and through-hole
Low frequency drift over temperature
Works with external load capacitors for tuning
📦 Technical Specifications
| Parameter | Value |
|---|---|
| Nominal Frequency | 16 MHz |
| Frequency Tolerance | ±30 ppm (typical) |
| Load Capacitance | 18 pF (common) |
| Operating Temperature | −20°C to +70°C |
| Package Type | HC-49S (radial, through-hole) |
| Drive Level | 100 µW (typical) |
| Aging Rate | ±5 ppm/year (typical) |
| Mounting | Through-hole (2-pin) |
🛠️ Usage Notes
Place two 22pF capacitors from each leg of the crystal to GND
Connect one leg to XTAL1 and the other to XTAL2 of MCU
Used as a system clock for Arduino, ATmega328P, ESP8266 (external crystal mode)
Ensure proper grounding to avoid noise issues
🎯 Common Applications
Arduino Uno/Nano/Pro Mini clock source
Real-time embedded systems
Communication devices
Frequency timers and counters
Oscillator circuits with logic ICs