UM3090 Datasheet (Union Semiconductor) - True RS-485 Transceivers

UM3090, True RS-485 Transceivers

The UM3090EESA is ±15kV ESD-protected, high-speed transceiver for RS-485 communication that contains one internal low-dropout regulator, one driver and one receiver.

The internal LDO allows the device to operate from an unregulated power supply of up to 30V.

The internal LDO generates a 5V±5% power

UM3090 Features

* fail-safe circuitry, which guarantees a logic-high receiver output when the receiver inputs are open, shorted or idle. This means that the receiver output will be logic high if all transmitters on a terminated bus are disabled (high impedance). The UM3090EESA features reduced slew-rate driver that