Hw-044 Datasheet //top\\ -
The (often marketed as the RS232 to TTL Converter Board) transforms high-voltage RS232 signal levels ( ± 12V typically) into low-voltage 3.3V or 5V TTL signals, and vice versa. It is specifically designed to allow microcontrollers to communicate with devices that have a standard DB9 RS232 port. Key Applications
The board splits its interfaces into two distinct regions for installation ease. 1. Microcontroller Side (4-Pin Header) HW-044-1 MAX3232
The HW-044, as characterized above, is a compact, low-power analog/digital sensor module suitable for embedded and IoT applications. Its combination of on-board signal conditioning, digital interface, low standby current, and configurable alerts makes it flexible for many use cases. Designers should follow recommended PCB layout, supply decoupling, and filtering practices to achieve the stated performance, and plan for periodic recalibration in precision deployments. hw-044 datasheet
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| 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 | The (often marketed as the RS232 to TTL
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If you have been tinkering with Arduino or Raspberry Pi for a while, you have likely accumulated a bag of miscellaneous blue breakout boards. One of the most common—yet often misunderstood—is the . The article will include an introduction
| Parameter | Value | | :--- | :--- | | | HW-044 | | Primary IC | MAX3232 | | Operating Voltage | 3.3V - 5V DC (Compatible with 3.3V and 5V logic systems) | | Operating Current | ~6 mA (Very low power consumption) | | Main Function | Bi-directional RS232 ⇔ TTL signal level conversion | | Interface | RS232 side: DB9 female connector or terminal block TTL side: 4-pin header (VCC, GND, TXD, RXD) | | Dimensions (Approx.) | ~33mm x 32mm x 16mm (varies slightly by manufacturer) | | Baud Rate | Up to 250 kbps (depending on the MAX3232 chip) |
. Using 5V on a 3.3V-only pin can damage your microcontroller. Cross the TX/RX Pins : Remember that TX (Transmit) on the module goes to RX (Receive)