• 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
• High Transient Over Voltage Tolerance: ±80V
• Full Fail-safe (Open, Short, Terminated) RS-485 Receivers
• High Rx I_OL 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
• Pb-Free (RoHS Compliant)

The ISL31470E, ISL31472E, ISL31475E, ISL31478E 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 protected against overvoltages up to ±60V. Additionally, these transceivers operate in environments with common mode voltages up to ±15V (exceeds the RS-485 requirement), making this RS-485 family one of the more robust on the market.

Transmitters deliver an exceptional 2.5V (typical) differential output voltage into the RS-485 specified 54Ω load. This yields better noise immunity than standard RS-485 ICs, or allows up to six 120Ω terminations in star topologies.

Receiver (Rx) inputs feature a Full Fail-Safe design which ensures a logic high Rx output if Rx inputs are floating, shorted, or on a terminated but undriven (idle) bus. Rx outputs feature high drive levels - typically 15mA @ V_OL = 1V (to ease the design of opto-coupled isolated interfaces).

Half duplex (Rx inputs and Tx outputs multiplexed together) and full duplex pinouts are available.

For an RS-485 family with a ±25V extended common mode range, please see the ISL31490E and ISL31480E data sheets.

• Utility Meters/Automated Meter Reading Systems
• High Node Count Systems
• PROFIBUS™ and Field Bus Networks, and Factory Automation
• Security Camera Networks
• Building Lighting and Environmental Control Systems
• Industrial/Process Control Networks