FAIL-SAFE, 2.5MBPS, RS-485 / RS-422 TRANSCEIVERS WITH

±12KV ESD-PROTECTED

DESCRIPTION

The UTC UTRS3085 high-speed transceivers for RS-485/RS-422

communication contain one driver and one receiver. The device

features fail-safe circuitry, which guarantees a logic-high receiver

output when the receiver inputs are open or shorted. This means that

the receiver output will be logic high if all transmitters on a terminated

bus are disabled (high impedance). The UTC UTRS3085 offer higher

driver output slew-rate limits, allowing transmission up to 2.5Mbps.

The transceiver typically draws 375µA of supply current when

unloaded or when fully loaded with the drivers disabled.

A device has a 1/8-unit-load receiver input impedance that allows

up to 256 transceivers on the bus.

FEATURES

* True fail-safe receiver while maintaining EIA/TIA-485 compatibility.

* Enhanced slew-rate limiting facilitates Error-Free data transmission.

* 5.0V single power supply.

* 1µA low-current shutdown mode.

* Allow up to 256 transceivers on the Bus.

* HBM ±12kV ESD-protected.

* Driver short circuit current limit.

* Thermal shutdown for overload protection.