DESCRIPTION：

The SP3485 device is a +3.3V low power half-duplex transceiver that meets the specifications of the RS-485 and RS-422 serial protocols. This device is pin-to-pin compatible withthe Exar SP48, SP483 and SP485 devices as well as popular industry standards. TheSP3485 features the Exar BiCMOS process, allowing low power operation without sacrificingperformance. The SP3485 can meet the electrical specifications of the RS-485 and RS-422serial protocols up to 0Mbps under load.

Features：

• RS-485 and RS-422 Transceiver

• Operates from a single +3.3V Supply

• Interoperable with +5.0V logic

• Driver/Receiver Enable

• -7V to +2V Common-Mode Input Voltage Range

• Allows up to 32 transceivers on the serial bus

• Compatibility with industry standard 7576 pinout

• Driver Output Short-Circuit Protection