Si5351 Module I2C Clock Generator Breakout Board 8kHz-160MHz

The Si5351 Module I2C Clock Generator Breakout Board 8kHz-160MHz is a compact programmable clock generator module for electronics projects. It is used to generate configurable clock and signal frequencies for Arduino, ESP32, Raspberry Pi, RF experimentation, frequency synthesis, and custom microcontroller-based timing applications.

The Si5351 Module I2C Clock Generator Breakout Board 8kHz-160MHz is also known as a Si5351A clock generator module, Si5351 I2C signal generator, Si5351 breakout board, programmable clock generator module, frequency synthesizer module, RF clock generator module, Arduino clock generator board, Raspberry Pi clock generator module, Si5351 oscillator module, CJMCU-5351 module.

Si5351 Module Benefits for Arduino, ESP32, Raspberry Pi and RF Projects

The Si5351 Module I2C Clock Generator Breakout Board gives New Zealand electronics makers a practical way to add programmable clock generation to compact digital, RF, and microcontroller projects.

• Generate configurable clock signals for prototyping, testing, and frequency synthesis
• Use I2C control for straightforward integration with Arduino, ESP32, Raspberry Pi, and other compatible microcontrollers
• Create multiple independent output frequencies for timing, RF experimentation, and clock replacement projects
• Suitable for VFO, signal generator, oscillator, and custom embedded electronics projects
• Compact breakout-board format makes it easier to prototype than working directly with a small IC package
• Useful for makers, radio hobbyists, electronics students, and hardware developers building frequency-controlled projects
• Add flexible clock-generation capability to your next Techexpress NZ electronics build

Features of the Si5351 Module I2C Clock Generator Breakout Board 8kHz-160MHz:

• Si5351A-style programmable clock generator module
• I2C control interface
• Frequency range: 8kHz-160MHz
• Three independent clock outputs
• Designed for microcontroller-based frequency control
• Suitable for Arduino, ESP32, Raspberry Pi, and compatible I2C controllers
• Commonly used with 3V and 5V logic projects
• Onboard reference crystal design
• Breakout-board format for easier prototyping
• Suitable for RF, clock, oscillator, and signal-generation experiments
• Compact module for breadboard and jumper-wire development 

Applications for the Si5351 Module I2C Clock Generator Breakout Board 8kHz-160MHz:

• Arduino clock generator projects
• Raspberry Pi frequency generator projects
• ESP32 signal generator projects
• RF signal experimentation
• VFO projects
• Amateur radio projects
• Frequency synthesizer builds
• Clock replacement projects
• Oscillator prototyping
• Test signal generation
• SDR-related experimentation
• Microcontroller timing projects
• Electronics learning and lab projects
• Custom embedded hardware development

Compatibility

The Si5351 Module I2C Clock Generator Breakout Board 8kHz-160MHz is designed for use with microcontrollers and development boards that support I2C communication. It is best suited to Arduino, ESP32, Raspberry Pi, and similar platforms where the user can control the module through software.

This module is commonly used in projects that require configurable clock outputs, frequency synthesis, oscillator replacement, RF experimentation, or a programmable signal source. It is suitable for electronics users who are comfortable connecting VCC, GND, SDA, SCL, and output pins to a compatible controller or circuit.

The module requires suitable software support, such as an Si5351-compatible Arduino library, ESP32 I2C code, Raspberry Pi I2C code, or other compatible embedded software. It is not a standalone bench signal generator and does not include a display, keypad, enclosure, USB interface, power supply, or finished instrument controls.

For Raspberry Pi use, ensure the I2C bus is enabled and the signal voltage is suitable for the Raspberry Pi GPIO environment. For Arduino and ESP32 use, confirm the board voltage, wiring, and library configuration before applying power. RF output use may require additional buffering, filtering, impedance matching, connectors, shielding, or calibration depending on the project.

Technical Specifications

Compatibility
• Compatibility: Arduino, ESP32, Raspberry Pi, and compatible I2C microcontroller projects
• Not Compatible With: Direct household mains power, standalone bench use without a controller, or plug-and-play audio output
• Product Type: I2C clock generator breakout module
• Chipset / Controller / Main Component: Si5351A-style programmable clock generator

Connectivity / Electrical
• Supply Voltage: Commonly used with 3V-5V DC breakout-board projects
• Interface: I2C
• Frequency Range: 8kHz-160MHz
• Outputs: Three independent clock outputs
• Output Type: Clock signal output for electronics and RF experimentation
• Reference Clock: Onboard crystal reference design
• Setup Required: Requires compatible wiring and software configuration

Physical / Package Information
• Mounting / Pin Format: Breakout board for jumper-wire and breadboard-style prototyping
• Board Dimensions: Not confirmed for this generic module
• Included Items: 1x Si5351 Module I2C Clock Generator Breakout Board 8kHz-160MHz
• Sold As: Single module
• Condition: New
• Product Code: SI5351-I2C-CLKGEN-BRKOUT-8K160M-NZ
• Product Category: Clock Generator Module
• Applications: Arduino projects, ESP32 projects, Raspberry Pi, RF experiments, VFO, frequency synthesis, clock replacement

⚠️ Limitations

• Not a standalone signal generator: This module requires a compatible microcontroller, wiring, and software configuration.
• Not for mains power: Do not connect this module directly to 230V or 240V household electricity.
• No finished enclosure or controls: This is a breakout board, not a complete bench instrument with a case, display, buttons, or USB control interface.
• Software setup required: Frequency output depends on correct I2C communication and compatible Si5351 control code.
• RF use may need extra circuitry: Projects involving RF output may require buffering, filtering, shielding, impedance matching, or SMA/coax hardware.
• Output drive is limited: The module is intended for clock and signal-level electronics work, not for directly driving heavy loads.
• Compatibility must be checked: Confirm voltage levels, I2C wiring, library support, and project requirements before purchase.
• No audio amplification: This module generates clock/signal outputs and is not an audio amplifier, speaker driver, or music playback module.

Package includes: 1x Si5351 Module I2C Clock Generator Breakout Board 8kHz-160MHz.

*Does not include a: Arduino board, ESP32 board, Raspberry Pi, jumper wires, breadboard, SMA connector, antenna, coaxial cable, power supply, USB cable, enclosure, display, keypad, or programming software. The image is for illustrative purposes only. Due to variations in camera settings, lighting, manufacturing processes, monitors, and supply, colours may differ. Product appearance and specifications are subject to change without notice.

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