3.3 V, Low Power, RS-485/RS-422 Transceiver (Half Duplex, 250 kbps, Slew Rate Limited, DE/RE)

The ADM3483 / ADM3485 / ADM3488 / ADM3490 / ADM3491 are low power, differential line transceivers designed to operate using a single 3.3 V power supply. Low power consumption, coupled with a shutdown mode, makes the ADM3483 / ADM3485 / ADM3488 / ADM3490 / ADM3491 ideal for power-sensitive applications.

The ADM3488 / ADM3490 / ADM3491 feature full-duplex communication, while the ADM3483/ADM3485 are designed for half-duplex communication.

The ADM3483 / ADM3488 feature slew rate limited drivers that minimize EMI and reduce reflections caused by improperly terminated cables, allowing error-free data transmission at data rates up to 250 kbps.

The ADM3485 / ADM3490 / ADM3491 transmit at up to 10 Mbps. The receiver input impedance is 12 kΩ, allowing up to 32 transceivers to be connected on the bus. A thermal shutdown circuit prevents excessive power dissipation caused by bus contention or by output shorting. If a significant temperature increase is detected in the internal driver circuitry during fault conditions, then the thermal shutdown circuit forces the driver output into a high impedance state. If the inputs are unconnected (floating), the receiver contains a fail-safe feature that results in a logic high output state. The parts are fully specified over the commercial and industrial temperature ranges. The ADM3483 / ADM3485 / ADM3488 / ADM3490 are available in 8-lead SOICN; the ADM3491 is available in a 14-lead SOICN.

APPLICATIONS

* Low-Power RS-485/RS-422 Applications

* Telecom

* Industrial Process Control

* HVAC

* Operate with 3.3 V supply

* Interoperable with 5 V logic

* EIA RS-485/RS-422 Compliant over Full Common-mode Range

* Data Rate Options:250kbps

* Half and Full Duplex Options

* Reduced Slew Rates for Low EMI