MAX3485 MAX485 Module Development Board TTL to RS485 Module MCU Development Accessories Overvoltage Protection
KSH 400.00
Out of Stock
The MAX3485 module enables bidirectional TTL to RS485 signal conversion for MCU development, featuring builtin overvoltage protection for reliable longdistance communication[citation:1][citation:2].
| Parameter | Value |
|---|---|
| Chip | MAX3485 industrial grade[citation:1] |
| Supply Voltage | 3.3V[citation:7][citation:8] |
| Data Rate | Up to 12Mbps[citation:2] |
| Communication | Half-duplex[citation:2] |
| ESD Protection | ±15kV HBM[citation:12] |
| Distance | Up to 1km[citation:7] |
| Temperature Range | -40°C to +85°C[citation:2] |
| Nodes Supported | 256 devices[citation:11] |
= Key Features =
Overvoltage Protection - Safeguards RS485 lines[citation:1]
ESD Protected - ±15kV on I/O pins[citation:9]
Low Power - 3.3V operation with shutdown mode[citation:12]
Signal Indicators - TX/RX status LEDs[citation:1]
Termination Resistor - 120Ω jumper for long lines[citation:1]
√ 120Ω termination resistor onboard
√ Power and signal indicator LEDs
√ Compatible with Arduino, ESP32, STM32[citation:7]
| Pin | Function | Description |
|---|---|---|
| VCC | Power | 3.3V input[citation:7] |
| GND | Ground | Power return |
| RO | RX Output | TTL receive to MCU[citation:2] |
| DI | TX Input | TTL transmit from MCU[citation:2] |
| DE/RE | Enable | HighTX, LowRX (tie together)[citation:2] |
| A/B | RS485 | Differential lines[citation:7] |
> Tie DE and RE together for simple half-duplex control[citation:6]
No communication:
Short range:
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