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Features:

3.3V power supply, half-duplex;

1/8 unit load allows up to 256 devices on the bus;

Driver output short-circuit protection function;

Over temperature protection function;

Low power shutdown function;

Receiver open circuit protection function;

Strong anti-noise ability;

Integrated transient voltage resistance function;

Transmission rate up to 12Mbps in an electrical noise environment;

Description

The ST3485E is a 3.3V powered, half-duplex, low-power RS-485 transceiver that fully meets the

requirements of the TIA/EIA-485 standard.

The ST3485E includes a driver and a receiver, both of which can be independently enabled and

disabled. When both are disabled, both the driver and the receiver output a high impedance state. The

ST3485E has a 1/8 load that allows 256 ST3485E transceivers to be connected to the same

communication bus. Error-free data transfer of up to 12Mbps is possible.

The ST3485E operates from a voltage range of 3.0 to 3.6V and features fail-safe, over

temperature protection, current limit protection, over-voltage protection, and other functions.