SPH0645LM4H I2S MEMS Microphone Module for Raspberry Pi

SPH0645LM4H I2S MEMS Microphone Breakout Board – Compatible with Raspberry Pi & Cortex M Series

Upgrade your audio capture projects with the SPH0645LM4H I2S MEMS Microphone Breakout Module. Designed for makers, engineers, and hobbyists, this compact sensor board delivers clean, digital audio over a standard I2S interface — making it a perfect companion for Raspberry Pi, Feather M0, Arduino Zero, and other compatible single-board computers or microcontrollers.

Key Features

• I2S Digital Output: Delivers high-quality digital audio directly — no ADC required on your microcontroller.
• Selectable Mono Channel: Set the microphone to left or right channel by connecting the Select pin to power or ground.
• Stereo-Ready: Use two modules sharing clock, WS, and data lines to achieve stereo audio capture.
• Low Voltage Operation: Operates at 1.6V–3.6V, making it ideal for modern 3.3V logic boards and single-board computers.
• Bottom-Ported Design: The sound port faces downward — orient the board so the bottom faces the audio source you want to capture.
• Broad Compatibility: Works seamlessly with Cortex M series microcontrollers (e.g., Feather M0, Arduino Zero) and Raspberry Pi.
• Compact Form Factor: Measures just 17 × 13 mm — small enough to integrate into tight spaces and portable builds.
• Made in Mainland China.

Specifications

What's in the Box

• 1 × SPH0645LM4H I2S MEMS Microphone Breakout Board

Important Notes

• This module is not compatible with 5V logic. Please verify your board uses 3.3V (or compatible 1.6–3.6V) I2S interface before connecting.
• Many entry-level microcontroller boards do not include I2S support — confirm I2S compatibility before purchase.
• For stereo capture, two modules are required (sold separately).
• Slight color variation from product images may occur due to monitor and lighting differences. Please refer to the actual product received.
• Allow slight manual measurement deviation for listed dimensions.

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Frequently Asked Questions

Q: Is the SPH0645LM4H microphone breakout module compatible with Raspberry Pi?

A: Yes! The SPH0645LM4H I2S MEMS Microphone Breakout Module is specifically designed to work with Raspberry Pi and other single-board computers that support the I2S digital audio interface. It also works with Cortex M series microcontrollers such as the Feather M0 and Arduino Zero.

Q: Can I use two of these modules together for stereo audio?

A: Absolutely. The SPH0645LM4H is a mono microphone, but you can achieve stereo audio by using two modules simultaneously. Simply share the clock, WS, and data lines between them, and set one module to the left channel and the other to the right channel using the Select pin.

Q: What voltage does this I2S MEMS microphone module require?

A: The module operates at 1.6V to 3.6V. It is not compatible with 5V logic boards. Most modern Raspberry Pi and Cortex M series boards use 3.3V logic, which is fully compatible with this module.

Q: Which direction should the microphone face for best audio capture?

A: The sound port is located at the bottom of the board. For optimal audio capture, orient the module so the bottom (port side) faces toward the audio source you wish to record.

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.