SIT3485 is a 3.3V power supply, half-duplex, low power, RS485 Transceiver. SIT3485 fully meets the TIA/EIA-485 standard. SIT3485 includes a driver and a receiver, both of which can be independently enabled and disabled. When both are disabled, the driver and receiver outputs are high-impedance state. SIT3485 has a 1/8-unit-load receiver input impedance, that allows up to 256 transceivers on the bus. The SIT3485 allowing error-free data transmission up to 12Mbps. SIT3485 operates under the supply voltage of 3.0~3.6V. SIT3485 is a true fail-safe transceiver. SIT3485 also has the function of thermal shutdown protection, current limiting protection, overvoltage protection.