MAX3485 TTL to RS485 3.3V One Way Serial Converter Module
The MAX3485 TTL to RS485 Module is a one-way serial communication interface designed to convert 3.3V TTL UART signals to robust RS485 differential signals. It is ideal for integrating microcontrollers (Arduino, ESP32, STM32) and embedded systems into industrial multi-drop networks requiring long-distance, noise-immune data transmission.
Features
- Integrates the MAX3485 low-power, slew-rate-limited RS-485 transceiver for reduced EMI and stable communication.
- Operates on a 3.0V to 3.6V supply, making it compatible with 3.3V logic systems like ESP32 and Raspberry Pi.
- Features a one-way (transmit-only) communication interface with dedicated direction control (DE) pin.
- Equipped with a standard 2.54mm pitch pin header for easy connection to development boards and prototyping.
- Compact PCB design (approx. 17mm x 12mm) for space-constrained industrial and automation applications.
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This module serves as a critical interface bridge, converting the single-ended TTL signals from a microcontroller’s UART port into the balanced differential signals used by the RS-485 standard. The onboard MAX3485 transceiver is specifically designed for half-duplex data transmission with slew-rate limiting, which minimizes electromagnetic interference (EMI) and ensures signal integrity over cable lengths up to 1200 meters, depending on data rate and environment.
Its one-way design simplifies wiring and control, requiring only a single direction control line to switch between transmit and receive states. The module’s 3.3V operating voltage aligns with modern low-power embedded systems, providing a reliable and high-value communication link for industrial automation, building management systems, and distributed sensor networks.
Additional Information
| Weight | 0.002 kg |
|---|---|
| Dimensions | 1.7 × 1.2 cm |
