ST491A(2007) Datasheet - STMicroelectronics

Description
The ST491A is a low power transceiver for RS-485 and RS-422 communications. The device contains one driver and one receiver in full duplex configuration. The ST491A draws 5mA (typ.) of supply current when unloaded and operates from a single 5V supply.

FEATUREs
■ Low supply current: 5mA max
■ Designed for RS485 interface applications
■ -7V to 12V common mode input voltage range
■ 70mV typical input hysteresis
■ Designed for 25Mbps operation
■ Operate from a single 5V supply
■ ±4kV ESD protection
■ Current limiting and thermal shutdown for driver overload protection