Datasheet //top\\ - Hw-044
: While the IC supports up to 250kbps, long cables (over 15 meters) will require you to lower the baud rate to 9600 or 19200 to avoid data corruption.
The is a compact RS232 to TTL Serial Port Converter module. It acts as a bridge, allowing modern microcontrollers (like Arduino or ESP32) to communicate with legacy industrial equipment or computers that use high-voltage RS232 signals. Core Technical Specifications The module is built around the MAX3232 transceiver IC:
: System Common Ground reference. Must connect with the MCU ground.
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The underlying core of the HW-044 module is the Texas Instruments or Maxim Integrated . Unlike older MAX232 modules which require a strict 5V power supply, the MAX3232 features a dual internal charge pump that allows it to operate across a much broader voltage range while retaining full RS232 compliance.
Connects to the RX pin of your microcontroller. Key Features and Use Cases
Datasheets are crucial documents for engineers, designers, and anyone working with electronic components or modules. They serve as a primary source of information for understanding the capabilities, limitations, and operational parameters of a device. For something like the HW-044, which could be anything from a simple electronic component to a complex module, the datasheet would be indispensable. : While the IC supports up to 250kbps,
The HW-044 has clearly labeled on the PCB:
Ideal for connecting modern microcontrollers to older industrial equipment, digital multimeters , or PLC units that still use RS232. Compact Design: Small footprint (approx.
| Parameter | Value / Description | | :--- | :--- | | | HW-044 | | Primary Function | RS232 to TTL signal level conversion | | Core Chip | Maxim MAX3232 | | Operating Voltage (VCC) | 3.3 V to 5 V DC | | Typical Operating Current | ~6 mA | | Interface (Controller Side) | 4-pin header: VCC, GND, TXD, RXD | | Interface (RS232 Side) | DB9 female connector | | Compatibility | Arduino, STM32, AVR, PIC, Raspberry Pi, etc. | | Typical Applications | Debugging legacy equipment, programming, data exchange between modern and legacy systems | | Dimensions (approx.) | 33 mm x 32 mm x 16 mm | Core Technical Specifications The module is built around
The is a compact, highly reliable RS232-to-TTL serial converter board built around the MAX3232 integrated circuit . This hardware solution bridges the gap between legacy industrial computer equipment running high-voltage RS232 protocols and modern low-voltage microcontrollers like Arduino, ESP32, STM32, and Raspberry Pi. HW-044 Datasheet & Technical Specifications Hardware Specifications Specification Core Transceiver IC Texas Instruments / Maxim MAX3232 Dual driver/receiver architecture Operating Voltage (VCC) 3.0V to 5.5V DC Supports both 3.3V and 5V logic Logic Level Side (TTL) Autocompatible with microcontrollers RS232 Connector DB9 Female (9-Pin) Direct connection to PC COM ports Maximum Data Rate 120 Kbps Standard communication ceiling Board Dimensions 32 mm × 30 mm (approx) Ultra-compact PCB form factor Onboard Passives 4 × 0.1µF Capacitors External charge pump network Functional Overview & Core Mechanism
The "HW-044" code is also used for products unrelated to electronics, such as LED desk lamps, decorative furniture nails, and even government procurement contract numbers. This article focuses on the most common electronic modules, as they are the ones for which a "datasheet" is most relevant.
Cheap HW-044 modules often use "clone" MAX3232 chips which may struggle with higher baud rates or exhibit instability at exactly 3.0V. If you are planning a build, I can help you with:
Interfacing microcontrollers with PLCs or industrial sensors.