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 ±60V and are protected against ±16.5kV ESD strikes without latch-up. Additionally, these transceivers operate in environments with common-mode voltages up to ±15V (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 ±60V

• Extended common-mode range. . . . . . . . . . . . . . . . . . . . ±15V larger than required for RS-485

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

• ±16.5kV HBM ESD protection on RS-485 bus pins

• High transient over-voltage tolerance . . . . . . . . . . . . . . . ±80V

• 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. . . . . . . . . . . . . . . . . . 10µA

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