Si5351A I2C Clock Generator, 8 kHz–160 MHz (3–5 V DC)

The module can generate up to three independent output frequencies in the range 8 kHz to 160 MHz. It is fitted with a high-quality 25 MHz crystal oscillator for stable output signals.

It is ideal for radio projects (SDR), digital systems, embedded device development, test applications and any project requiring an accurate clock or reference signal.

🔧 Features:

• Chip: Si5351A

• Supply voltage: 3,3 V – 5 V DC

• Communication: I2C (SDA, SCL)

• Output frequency range: 8 kHz – 160 MHz

• Number of outputs: 3 (CLK0, CLK1, CLK2)

• Built-in oscillator: 25 MHz Xtal

• Selectable I2C address: via jumpers (0, 1, 2)

• Interface: standard pins for easy connection to microcontrollers (ESP32, Arduino, STM32, etc.)

📦 Applications:

• Clocking microprocessors and FPGAs

• Generating RF signals (e.g. SDR and amateur radio)

• Replacing expensive precision oscillators

• Experimental frequency generators

• Precision timing in embedded projects

💡 Tip: Output frequencies can be configured independently in software (e.g. with the Arduino Si5351 library).

🧑‍💻 Example code for Arduino IDE will be added soon. 💻