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The ISL32470E, ISL32472E, ISL32475E, and ISL32478E are fault-protected, extended common-mode range differential transceivers that exceed the RS-485 and RS-422 standards for balanced communication. The RS-485 bus pins (driver outputs and receiver inputs) are fault protected against overvoltages up to ¡À60V and are protected against ¡À16.5kV ESD strikes without latch-up. Additionally, these transceivers operate in environments with common-mode voltages up to ¡À15V (exceeds the RS-485 requirement), making this fault-protected RS-485 family one of the most robust on the market.

Features

? Fault protected RS-485 bus pins . . . . . . . . . . . . . . Up to ¡À60V

? Extended common-mode range. . . . . . . . . . . . . . . . . . . . ¡À15V larger than required for RS-485

? 1/4 unit load for up to 128 devices on the bus

? ¡À16.5kV HBM ESD protection on RS-485 bus pins

? High transient over-voltage tolerance . . . . . . . . . . . . . . . ¡À80V

? Full fail-safe (open, short, terminated) RS-485 receivers

? High Rx IOL for opto-couplers in isolated designs

? Hot plug circuitry: Tx and Rx outputs remain three-state during power-up/power-down

? RS-485 data rates. . . . . . . . . . . . . . . . . . . . . .250kbps to 15Mbps

? Low quiescent supply current. . . . . . . . . . . . . . . . . . . . 2.3mA

? Ultra low shutdown supply current. . . . . . . . . . . . . . . . . . 10?A

Applications

? Utility meters and automated meter reading systems

? High node count RS-485 systems

? PROFIBUS and RS-485 based field bus networks, factory automation

? Security camera networks

? Building lighting and environmental control systems

? Industrial/process control networks