New York -- Designed for harsh industrial applications, Exar Corp.’s latest XR3070-78X family of ruggedized RS-485/RS-422 transceivers includes analog bus pins that can withstand direct shorts up to +/-18 V and are protected from ESD events exceeding IEC Level 4.
The XR3070-78X family from Exar (Fremont, Calif.) consists of nine devices that support data rates up to 20 Mbit/s in either full or half-duplex configurations. They operate from 3.3 V with a 300 ĶA idle current, consuming half the power of a comparable +/-18 V fault-tolerant device.
The devices are well suited for energy metering, building automation, security systems, process control, industrial automation, as well as other applications that route 15 Vdc or 12 Vac power in the same cable pack as the RS-485 data lines. Damaged cables or incorrect wiring can expose the transceiver to these voltages, which will permanently damage standard RS-485 devices.
"ESD and over-voltage events are leading causes of field failures and equipment returns in industrial communication applications," said Jack Roan, product marketing manager, Exar, in a statement. "The XR3070-78X family delivers robust protection in both these areas, providing our customers with an additional measure of safety against installation errors or cable faults and at the same time significantly reducing system power consumption."
The XR3070-78X family is available in industry standard 8 NSOIC and 14 NSOIC packages. Pricing for the XR3070-78X family is $1.25 in 1,000-unit quantities.
-- Ismini Scouras is a freelance writer for EE Times.