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SP3485 3.3V UART to RS485 Transceiver Module — 32 Nodes, RJ-45 & Screw Terminal

SP3485 3.3V UART to RS485 Transceiver Module 32 Nodes, RJ-45 & Screw Terminal

$6.92 USD

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SP3485 3.3V UART to RS485 Transceiver Module — 32 Nodes, RJ-45 & Screw Terminal

This SP3485 RS485 transceiver module is designed specifically for 3.3V microcontrollers (ESP32, STM32, Raspberry Pi) — operating from a single +3.3V supply while remaining interoperable with +5V RS485 bus devices. The SP3485 IC provides -7V to +12V common-mode input voltage range for robust noise immunity. RS485 I/O is broken out to an RJ-45 connector, 3.5mm screw terminal, and 0.1" pitch header for flexible wiring. Driver/receiver enable is connected to the RTS line for automatic flow control.

Specifications

Transceiver IC: SP3485
Supply Voltage: 3.3V (single supply)
Logic Compatibility: Interoperable with 5V logic devices
Common-Mode Range: -7V to +12V
Bus Nodes: Up to 32 transceivers per bus
Flow Control: RTS pin controls driver/receiver enable (auto direction)
Output Protection: Driver short-circuit protection
Connectors: RJ-45, 3.5mm screw terminal, 0.1" header
Dimensions: 0.9 × 1.0"

SP3485 vs MAX485 for 3.3V MCUs

SP3485 (this module): Native 3.3V supply, 5V bus compatible — for ESP32, STM32, Raspberry Pi
MAX485: 5V supply required — needs level shifter for 3.3V MCUs
SP3485 is the correct choice for 3.3V microcontroller RS485 applications

Typical Applications

ESP32 / STM32 Modbus RTU master/slave
Raspberry Pi RS485 industrial sensor network
3.3V MCU to RS485 bus interface
Building automation RS485 network node
Long-distance serial communication (up to 1200m)

SP3485 3.3V RS485 transceiver module — 32 nodes, RJ-45 and screw terminal, RTS flow control for ESP32/STM32 Modbus RTU and industrial RS485 network projects.