Crystal Oscillator 20MHz

The Crystal Oscillator 20MHz is a 20 MHz quartz crystal used as a stable, accurate clock source for microcontrollers and digital circuits. Connected to the oscillator pins of a microcontroller with two small load capacitors, it sets the clock far more precisely than an internal RC oscillator. 20 MHz is the top clock speed of many popular chips, such as the PIC16F877A and the ATmega328P at 5 V, so it is the value to choose when you want full speed.

Crystal Oscillator 20MHz Specifications

• Frequency: 20 MHz
• Type: quartz crystal, two-terminal (passive), driven by the microcontroller's oscillator circuit
• Load capacitors: typically 15–33 pF, commonly 22 pF, one from each pin to GND
• Polarity: none, can be fitted either way round

Crystal Oscillator 20MHz Applications

• Clock for PIC16F877A, PIC16F628A and PIC18F microcontrollers in HS mode
• Standalone ATmega328P and other AVR boards running at 20 MHz
• Accurate timing for clocks, counters and serial communication
• Digital electronics and microcontroller labs

What's in the Box

• 1 × 20 MHz crystal

Tip: Connect the crystal between the OSC1 and OSC2 (or XTAL1 and XTAL2) pins with a 22 pF ceramic capacitor from each pin to GND, and keep the leads short. On a PIC, select the HS oscillator mode in the configuration bits, because XT mode is only meant for crystals up to about 4 MHz.

Orders placed before 14:00 are ready for pickup the same day. Delivery across Lebanon usually takes 1–3 working days.