Hw-044 Datasheet -

The HW-044 is a compact, pre-assembled circuit board designed to convert signal voltage levels between and TTL (Transistor-Transistor Logic) serial communication standards. This conversion is a crucial step in modern electronics projects because the voltage levels used by classic RS232 devices are incompatible with the logic levels of modern microcontrollers.

Flashing firmware on DVD players, set-top boxes, or hard drives during recovery.

A: All three serve the same function. The key difference is the IC used. The HW-044 uses the MAX3232 , which is the most versatile. The main difference is the operating voltage: MAX232 requires 5V exclusively, while MAX3232 can be powered by 3.3V or 5V. Since the HW-044 uses the MAX3232, it is the more flexible and modern choice.

Micro-USB, Type-C USB, or Mini-USB female port (varies by board manufacturer), alongside dedicated solder pads. Operating Temperature: -10°C to +85°C Dimensions: Approximately 25mm x 19mm x 10mm Pinout and Connection Diagram hw-044 datasheet

For standard RS232-to-Arduino projects, connect the module and use the Serial object. The hardware handles the level shifting automatically.

Connect both GNDs together via the module’s GND pins – they are internally connected, but still wire both for low impedance.

Inside the IC, the conversion is handled by dual state-inverters. Legacy RS232 protocols use negative logic logic gates: a logic "1" (Mark) sits between -3V and -15V, while a logic "0" (Space) sits between +3V and +15V. The MAX3232's onboard charge pump steps up standard 3.3V/5V inputs to the appropriate higher positive and negative voltage rails needed for standard RS232 validation, converting standard logic Highs and Lows automatically without distorting baud rates. How to Connect the HW-044 to an Arduino Uno The HW-044 is a compact, pre-assembled circuit board

The technical architecture of the HW-044 module centers around low-power consumption and wide voltage compatibility. Below is the foundational data normally compiled in its datasheet profile: Specification Texas Instruments / Maxim MAX3232 Dual driver/receiver architecture Operating Voltage (VCC) 3.0V to 5.5V DC Matches both 3.3V and 5V logical platforms Logic Level Side (TTL) Automatically scales with your VCC input Serial Level Side (RS232) ±5V to ±15V standard Fully compliant with EIA/TIA-232 standards Maximum Data Rate 120 Kbps to 250 Kbps Dependent on cable length and capacitance Hardware Connector DB9 Female Port Standard PC COM port footprint Pin pitch (TTL header) 2.54 mm (0.1 in) Breadboard-friendly pins Dimensions 32 mm × 30 mm × 14 mm Ultra-compact, low-profile layout 📌 Pinout Profile & Interface Layout

: System Common Ground reference. Must connect with the MCU ground.

It is a widely adopted module in DIY electronics for serial debugging, firmware updates, and interfacing industrial equipment with embedded controllers. 1. Introduction and Functionality A: All three serve the same function

// DIN, CLK, CS, number of devices LedControl lc = LedControl(11, 13, 10, 1);

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: Transmit Data line. Connects directly to your microcontroller's hardware or software UART RX pin .

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.