The ISL32470E, ISL32472E, ISL32475E, 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 more 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

• Choice of RS-485 Data Rates . . . . . . . . . . . .250kbps to 15Mbps

• Low Quiescent Supply Current . . . . . . . . . . . . . . . . . . . 2.3mA

• Ultra Low Shutdown Supply Current . . . . . . . . . . . . . . . . 10µA

Applications

• Utility Meters/Automated Meter Reading Systems

• High Node Count RS-485 Systems

• PROFIBUS® and RS-485 Based Field Bus Networks, and Factory Automation

• Security Camera Networks

• Building Lighting and Environmental Control Systems

• Industrial/Process Control Networks