Àû²©¡¤(¼¯ÍÅ)ÓÐÏÞ¹«Ë¾¹ÙÍø

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 ¡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 more 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

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

? Low Quiescent Supply Current . . . . . . . . . . . . . . . . . . . 2.3mA

? Ultra Low Shutdown Supply Current . . . . . . . . . . . . . . . . 10?A

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