Hw-044 Datasheet -

HW-044 Datasheet: Complete Pinout, Specifications, and Application Guide

Introduction

The HW-044 is a highly popular, inexpensive, and versatile breakout board for the MAX98357 audio amplifier IC. If you are searching for the hw-044 datasheet, you are likely working on an embedded audio project involving an Arduino, ESP32, ESP8266, Raspberry Pi, or any other microcontroller that supports I²S (Inter-IC Sound) audio.

Unlike traditional analog amplifiers (like the LM386), the HW-044 uses a digital I²S input, which results in superior audio quality, reduced noise, and simpler wiring. This article serves as a comprehensive datasheet and practical guide, covering everything from electrical characteristics and pinout to schematic integration and troubleshooting. hw-044 datasheet

4. Hardware Connection Schematics

Here are two standard connection diagrams for the HW-044.

1. Overview of the HW-044 Module

The HW-044 is a breakout board designed around the Maxim Integrated MAX98357 DAC (Digital-to-Analog Converter) and audio amplifier. It takes a 3.3V or 5V I²S signal and directly drives a speaker (mono output) of up to 3.2 Watts at 4 Ohms. eBay Amazon AliExpress Adafruit

11. Where to Buy / Datasheet Availability

The HW-044 is sold on:

Note: There is no official single datasheet from one manufacturer, because HW-044 is a generic module name. However, the underlying circuit is well-documented using BSS138 level shifter schematics (e.g., from SparkFun or Adafruit’s 8-channel BSS138 breakout). SparkFun (as similar "8-channel level shifter")

Interfacing HW-044 with Arduino

Here is a standard wiring diagram and code example to get your HW-044 running with an Arduino Uno.