MAX3485 TTL To RS485 Module

MAX3485 TTL to RS485 Converter Module is a high-speed, low-power transceiver module designed for serial communication between TTL and RS485 devices. It enables long-distance, robust, and noise-resistant data transmission with differential signaling.

Key Features:

• TTL to RS485 Conversion: Facilitates communication between microcontrollers and RS485 networks.
• Half-Duplex Communication: Supports bidirectional data transfer.
• Low Power Consumption: Operates with minimal power usage.
• High-Speed Data Transmission: Up to 12Mbps data rate.
• 3.3V and 5V Compatibility: Works with most microcontrollers and embedded systems.
• ESD Protection: Enhanced protection against electrostatic discharge.

Technical Specifications:

• Operating Voltage: 3.3V – 5V
• Data Rate: Up to 12Mbps
• Communication Type: Half-duplex
• Power Consumption: Low-power operation
• Operating Temperature: -40°C to 85°C
• Package: Module with screw terminals and header pins

Schematic Diagram and Pinout:

Pinout:

• VCC: Power input (3.3V or 5V).
• GND: Ground connection.
• RO (Receiver Output): TTL serial output.
• DI (Driver Input): TTL serial input.
• DE (Driver Enable): Controls RS485 transmission mode.
• RE (Receiver Enable): Enables/disables receiving.
• A & B: Differential RS485 signal lines.

Schematic Diagram: Uses differential signaling to ensure robust communication over long distances.

Applications:

• Industrial Automation: Reliable communication in noisy environments.
• Long-Distance Communication: RS485 networks up to 1200 meters.
• Microcontroller Interfaces: Used with Arduino, ESP8266, STM32, Raspberry Pi, etc.
• Security Systems: Implemented in CCTV and access control systems.
• Building Automation: Used in HVAC, fire alarms, and smart metering.

Equivalent Models:

• MAX485: Similar RS485 transceiver with TTL interface.
• SN75176: Alternative transceiver for RS485 applications.