The BL3085N is an integrated circuit (IC) made by Belling that has been designed for use as a half-duplex RS-485/RS-422 interface. This IC provides a communication baud rate of 500kbps, allowing for high-speed communication up to a distance of 4000ft. It operates between a supply voltage of 4.5V up to 5.5V and comes in a standard SOP-8_150mil RoHS package. This product is designed for a variety of applications, including industrial control, instrumentation, automation, factory automation, and process control systems. Furthermore, it provides immunity from external noise and strong EMI/RFI signal interference.