ICS‑43434 MEMS Digital Microphone Module I2S Omnidirectional Audio Pickup Sensor Board For ESP32 STM32 Arduino Voice Recognition Audio DIY Development Project

ICS‑43434 I2S Digital Microphone Module

📌 Product Overview

The ICS‑43434 is a high‑performance MEMS digital microphone module with I2S output interface. It adopts professional MEMS acoustic sensing chip, delivers high‑accuracy audio sampling, low noise and stable performance. Compact circular PCB design with 13mm diameter, well‑crafted hardware layout, easy for embedding into various audio acquisition projects. It supports left / right channel configuration via solder pad short‑circuit, perfectly compatible with ESP32, STM32 and other main controllers with I2S peripheral.

📋 Product Specifications

Item	Parameter
Model	ICS‑43434
Interface	I2S
PCB Dimension	13mm × 13mm
Working Voltage	3.3V
Sensing Element	MEMS Microphone
Channel Mode	Left / Right channel configurable
Working Temperature	-40℃ ~ +85℃

🔌 Pin Definition

• VDD: Power supply pin, 3.3V input
• GND: Ground pin
• SCK: I2S serial data clock
• WS: I2S serial data word select
• SD: I2S serial data output
• L/R: Left / Right channel selection pin

💡 Function Description

WS is serial data word select of the I²S interface. L/R stands for Left/Right channel selection. When set to low level, the microphone outputs the signal on the left channel of the I²S frame. When set to high level, the microphone outputs the signal on the right channel. SCK is serial data clock of the I²S interface. SD is serial data output of the I²S interface. PS: Short‑circuit the left and middle pads, and the microphone outputs the signal on the right channel; short‑circuit the right and middle pads, and the microphone outputs the signal on the left channel. The default is short‑circuited on the right, with output on the left channel.

✨ Main Features

✅ MEMS high‑fidelity digital microphone ✅ Standard I2S digital audio output, no analog noise interference ✅ Configurable left‑right audio channel by solder pads ✅ Mini circular 13mm PCB, convenient for embedded installation ✅ Wide industrial working temperature range ✅ Comes with pin header for easy wiring

🛠 Application Scenarios

Voice recognition projects, audio signal collection, smart speaker development, sound monitoring device, embedded audio acquisition experiment, robot voice module.

⚠ Important Usage Notice

Kind reminder: If there are version differences or images not been updated, please refer to the actual product.