Hw-044 Datasheet May 2026
To use the HW-044, you need a microcontroller that can generate I²S. Below are minimal examples for two popular platforms.
The HW-044 simplifies driving multi-digit LED displays or matrices by reducing I/O pin usage. Its built-in MAX7219 handles multiplexing, current control, and memory refresh. With a simple 3-pin serial interface, it is ideal for microcontroller projects requiring visual output without complex wiring or real-time software multiplexing.
This datasheet summary is for educational/hobbyist reference. For full electrical specifications, refer to the official MAX7219 datasheet from Analog Devices.
The HW-044 is a compact RS232-to-TTL serial port converter module built around the MAX3232 integrated circuit. This module is an essential tool for projects that require communication between a computer (RS232 levels) and a microcontroller (TTL levels), such as an Arduino or ESP32. Technical Specifications
The HW-044 leverages the MAX3232 chip to ensure stable data transmission even at low voltages. Below are the primary technical parameters as found on the Hans Information datasheet and related technical documentation: Operating Voltage: 3.0V to 5.5V DC.
Operating Current: Typical 300 µA, up to 6 mA during active use. hw-044 datasheet
Data Rate: Guaranteed up to 120 kbps; typical performance up to 250 kbps. Logic Levels: Compatible with both 3.3V and 5V TTL systems.
Communication Chip: MAX3232 (proprietary low-dropout transmitter output stage). Dimensions: Approximately 32mm x 30mm.
Protection: ESD protection up to ±15 kV for the RS-232 bus terminal. Pin Configuration & Layout
The HW-044 module typically features a female DB9 connector on one end and a 4-pin header on the other for TTL connections. ESP32 RS232 Communication - Programming - Arduino Forum
The HW-044 is a digital touch sensor module based on the TTP223 capacitive touch sensor IC. Unlike a physical push-button that requires mechanical force, the HW-044 detects the change in capacitance when a finger (or conductive object) approaches the pad. To use the HW-044, you need a microcontroller
Common Aliases: Keyestudio Touch Sensor, TTP223 Module, Capacitive Touch Switch.
The HW-044 uses a 3-wire SPI-like interface:
Example registers:
Here are two standard connection diagrams for the HW-044.
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.
The HW-044 is not a standardized component like a 555 timer or a MOSFET. It is a breakout module assembled from generic parts. Therefore, no single company publishes an “official” datasheet under the name HW-044. Instead, the information is derived from:
For engineering purposes, treat the specifications provided in this article as the de facto hw-044 datasheet. If you require certification (RoHS, REACH, etc.), you may need to contact the specific retailer or manufacturer—Shenzhen HWTech, LCSC, or generic AliExpress suppliers.
To find original source material, search for "PS2 joystick module schematic" or "thumbstick potentiometer datasheet 10k linear." This datasheet summary is for educational/hobbyist reference