Boardoza RS485 3V3 Transceiver Breakout Board
A 3.3V RS-485 transceiver breakout board with automatic flow control, designed for long-distance and noise-resistant serial communication.
The Boardoza RS485 3V3 Transceiver Breakout Board is a compact and reliable communication interface built around the HTC Korea MAX485 RS-485 transceiver. This module is designed for long-distance half-duplex communication, offering automatic flow control, low-power operation, and robust differential signaling for electrically noisy environments.
With its stable and interference-resistant communication capabilities, this board is ideal for industrial automation, sensor networks, embedded communication systems, and building management applications.
Click here to purchase!
| Front Side | Back Side |
|---|---|
 |
 |
Key Features
- Maker-Friendly RS-485 Integration: Easily add long-distance wired communication to Arduino, ESP32, STM32, Raspberry Pi, and more.
- Fully Automatic Flow Control: No need for RE/DE pin handling—just connect TX/RX and start communicating instantly.
- Highly Noise-Resistant Signaling: Differential transmission ensures stable communication over long cables and in noisy environments—ideal for robotics, CNC systems, and industrial setups.
- Native 3.3V Compatibility: Directly interfaces with modern MCUs without requiring extra level shifters.
- Low-Power Design: Suitable for battery-operated IoT systems and remote sensors.
- Fast Data Transmission: Supports communication speeds up to 10 Mbps.
Technical Specifications
Manufacturer: HTC Korea
Model: MAX485
Input Voltage: 3.3V
Voltage Input Type: Screw terminal / 4-pin header
Interface: RS-485 (Half-Duplex)
Logic Level: 3.3V
Data Rate: Up to 10 Mbps
Receiver Input Range: ±7V
Functions: RS-485 Transceiver Module
Operating Temperature: –10°C ~ +70°C
Board Dimensions: 40mm × 40mm
Board Pinout
( J1 ) Input Connector
| Pin Number | Pin Name | Description |
|---|---|---|
| 1 | GND | Ground |
| 2 | TXD | Module TXD Pin |
| 3 | RXD | Module RXD Pin |
| 4 | VCC | Power Input (3.3V) |
( J2 ) Input Connector
| Pin Number | Pin Name | Description |
|---|---|---|
| 1 | GND | Ground |
| 2 | TXD | Module TXD Pin |
| 3 | RXD | Module RXD Pin |
| 4 | VCC | Power Input (3.3V) |
( J3 ) RS-485 Connector
| Pin Number | Pin Name | Description |
|---|---|---|
| 1 | COM | Common Ground |
| 2 | B | Inverting Driver/Receiver Line |
| 3 | A | Non-Inverting Driver/Receiver Line |
( J4 ) RS-485 Connector
| Pin Number | Pin Name | Description |
|---|---|---|
| 1 | COM | Common Ground |
| 2 | B | Inverting Driver/Receiver Line |
| 3 | A | Non-Inverting Driver/Receiver Line |
Board Dimensions
Step Files
Boardoza RS485 3V3 Transceiver Breakout Board.step
Datasheet
Version History
- V1.0.0 – Initial Release
Support
For technical questions or assistance, please contact support@boardoza.com
License
Shield: 
This work is licensed under a
Creative Commons Attribution-ShareAlike 4.0 International License.
In this page
Deprecated: str_replace(): Passing null to parameter #3 ($subject) of type array|string is deprecated in /var/www/fastuser/data/www/simdibasla.com/uygulamalar/bproducts/sistem/parsedown.php on line 43