INMP441 Omnidirectional MEMS Microphone Module I2S Interface

INMP441 Omnidirectional MEMS Microphone Module with I2S Interface

Upgrade your electronics projects with the INMP441 Omnidirectional MEMS Microphone Module — a high-performance, low-power digital microphone designed for makers, engineers, and hobbyists. Featuring a 24-bit digital I2S interface, this compact module delivers crystal-clear, high-definition audio capture with exceptional signal stability, making it ideal for voice recognition systems, IoT devices, audio recording projects, and more.

Made in Mainland China.

Key Features

• 24-Bit Digital I2S Interface: Delivers high-precision audio data with stable output performance for reliable integration into your projects.
• Omnidirectional Sound Capture: Flat broadband frequency response picks up sound equally from all directions, producing natural, high-definition audio.
• High Signal-to-Noise Ratio: MEMS sensor technology ensures clean audio output with minimal background interference.
• Bottom-Port Design: The INMP441 features a bottom-port configuration for versatile PCB mounting options.
• Integrated Signal Processing: Onboard MEMS sensor, signal conditioning, analog-to-digital converter, anti-aliasing filter, power management, and I2S interface — all in one compact module.
• Left/Right Channel Selection: Flexible L/R pin control — set low for left channel output, set high for right channel output.
• Wide Voltage Range: Operates on 1.8V–3.3V input power, compatible with most microcontrollers including ESP32, Arduino, and Raspberry Pi.

Specifications

Pin Interface Definition

• SCK: Serial data clock for I2S interface
• WS: Serial data word select for I2S interface
• L/R: Left/right channel selection (Low = Left Channel, High = Right Channel)
• SD: Serial data output from I2S interface
• VCC: Input power (1.8V – 3.3V)
• GND: Power supply ground

Package Contents

• 1× INMP441 Microphone Module
• 2× Pin Headers

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Learn more: ENERGY STAR product efficiency guidance

Frequently Asked Questions

Q: What microcontrollers are compatible with the INMP441 Microphone Module?

A: The INMP441 Microphone Module with I2S interface is broadly compatible with popular microcontrollers and single-board computers including ESP32, ESP8266, Arduino (with I2S support), and Raspberry Pi. Its 1.8V–3.3V operating range makes it a versatile choice for most modern development boards.

Q: How do I select the left or right audio channel on this MEMS microphone module?

A: Channel selection is controlled via the L/R pin. Connect it to a low logic level (GND) to output audio on the left channel, or connect it to a high logic level (VCC) to output audio on the right channel. This makes it easy to use two modules together for stereo audio capture.

Q: Can this omnidirectional microphone module be used for voice recognition projects?

A: Yes! The INMP441's omnidirectional pickup pattern, 24-bit I2S digital output, and high signal-to-noise ratio make it an excellent choice for voice recognition, speech processing, IoT audio sensing, and similar DIY electronics projects requiring clear, accurate sound capture.

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.