The Renesas Electronics are Bi CMOS 3.3V powered, Low Power, High Speed, single transceiver that meet both the RS-485 and RS-422 standards for balanced communication. these device have very low bus current and it is allows up to 256 transceiver on the network without violating the RS-485 specification ,32 unit load maximum and without using repeaters.

RS-485 I/O pin ESD protection
Full fail-safe receivers
Hot plug -Tx and Rx outputs remain three-state during power up
True 1/8 Unit load allows up to 256 devices on the bus
Single 3.3V supply
High data rates up to 20Mbps
Low quiescent supply current
-7V to +12V common mode Input/output voltage range
Half and full duplex pinout
Three state Rx and Tx outputs available
Current limiting and thermal shutdown for driver overload protection