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 SP3485E is a 3.3V powered, half-duplex, low-power RS-485 transceiver that fully meets the
requirements of the TIA/EIA-485 standard.
The SP3485E 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
SP3485E has a 1/8 load that allows 256 SP3485E transceivers to be connected to the same
communication bus. Error-free data transfer of up to 12Mbps is possible.
The SP3485E 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.