SPH0645LM4H I2S MEMS Microphone Breakout Board – Raspberry Pi

SPH0645LM4H I2S MEMS Microphone Breakout Sensor Board Module

Add high-quality digital audio input to your Raspberry Pi or Cortex-M microcontroller project with this compact SPH0645LM4H I2S MEMS Microphone Breakout Board. Operating between 1.6V and 3.6V, this module delivers clean, low-noise mono audio capture over the I2S digital interface — perfect for voice recognition, audio recording, and interactive electronics projects.

Key Features

• I2S Digital Output: Clean, low-noise digital audio signal — no analog-to-digital converter required on your host board.
• Wide Compatibility: Designed for Raspberry Pi and Cortex-M series microcontrollers (e.g., Arduino Zero / M0). Ensure your board supports I2S before connecting.
• Selectable Channel: Connect the Select pin to power or ground to choose left or right channel — ideal for mono or stereo setups.
• Stereo-Ready: Pair two modules by sharing clock, WS, and data lines for a full stereo configuration.
• Bottom-Ported Microphone: Sound inlet is on the underside of the board — orient accordingly so the port faces the audio source you wish to capture.
• 3.3V Logic Friendly: Operates at 1.6–3.6V; not compatible with 5V logic systems.
• Compact Form Factor: Measures just 17 × 13 mm — easy to embed in enclosures or wearable electronics.
• Durable Construction: Built with a plastic and metal housing for reliable, long-lasting performance.

Specifications

How to Use

1. Connect the module's I2S pins (clock, WS, data) to the corresponding pins on your Raspberry Pi or compatible microcontroller.
2. Set the Select pin to ground (left channel) or power (right channel) as needed.
3. For stereo, use two modules sharing the same clock, WS, and data lines — assign one to left and one to right channel.
4. Ensure the bottom port faces the sound source for optimal audio capture.

Compatible Projects

This breakout board is great for voice assistants, audio loggers, interactive installations, robotics, industrial automation, and any project that needs reliable digital audio input. Pair it with other electronics components for a complete build:

• Explore our 1/2" Drive 8-Piece Hex Short Socket Set for your workshop toolkit.
• Check out the 10-Piece Gardening Tool Kit for outdoor DIY projects.

Made in Mainland China.

Learn more: EPA guidance on lithium-ion battery handling

Frequently Asked Questions

Q: Is the SPH0645LM4H I2S Microphone Breakout Board compatible with Raspberry Pi?

A: Yes! This SPH0645LM4H microphone breakout board is specifically designed for use with Raspberry Pi and Cortex-M series microcontrollers. Simply connect the I2S clock, WS, and data lines to your Raspberry Pi's GPIO header to get started with digital audio input.

Q: Can I use two of these microphone modules for stereo recording?

A: Absolutely. For stereo audio, purchase two SPH0645 breakout boards and connect them to the same I2S clock, WS, and data lines. Set one module's Select pin to ground (left channel) and the other to power (right channel) to achieve a full stereo configuration.

Q: Will this module work with 5V Arduino boards?

A: No — the SPH0645LM4H operates at 1.6V to 3.6V and is not compatible with 5V logic systems. Additionally, most standard Arduino boards do not support the I2S interface. It is best used with 3.3V I2S-capable boards such as the Raspberry Pi or Cortex-M0/M4-based microcontrollers.

Q: Which direction should the microphone port face?

A: The sound inlet port is located on the bottom of the board. When mounting or positioning the module, ensure the underside faces toward the audio source you wish to capture for the best recording quality.

Production & Packaging Notice

To maintain high stock availability and fast shipping times, our items are sourced from multiple verified manufacturing facilities. While the core quality, materials, and product specifications remain identical, you may notice slight variations in the packaging design, manufacturing origin, or the wording of the printed instructions.