High ESD Protected, +125°C, 40Mbps, 3.3V, Full Fail-Safe, RS-485/RS-422 Transceivers

Intersil’s ISL3179E and ISL3180E are high ESD Protected (see Table 1 below), 3.3V powered, single transceivers that meet both the RS-485 and RS-422 standards for balanced communication. Each device has low bus currents (+220μA/-150μA), so it presents a “1/5 unit load” to the RS-485 bus. This allows up to 160 transceivers on the network without violating the RS-485 specification’s 32 unit load maximum, and without using repeaters.

特性 Features

? High ESD Protection on RS-485 I/O Pins

- ISL3179E . . . . . . . . . . . . . . . . . . . . . ±16.5kV IEC61000

- ISL3180E . . . . . . . . . . . . . . . . . . . . . . . . . . ±12kV HBM

- Class 3 HBM ESD Level on all Other Pins . . . . . . .>9kV

? Specified for +125°C Operation

? High Data Rates. . . . . . . . . . . . . . . . . . . . . . up to 40Mbps

? 5V Tolerant Logic Inputs

? 1/5 Unit Load Allows up to 160 Devices on the Bus

? Full Fail-Safe (Open, Shorted, Terminated/Undriven) Receiver

? Hot Plug - Tx and Rx Outputs Remain Three-State During Power-Up

? Low Quiescent Current . . . . . . . . . . . . . . . . . . 4mA (Max)

? Low Current Shutdown Mode. . . . . . . . . . . . . . 1μA (Max)

? -7V to +12V Common Mode Input Voltage Range

? Three-State Rx and Tx Outputs

? 16/16.5ns (Max) Tx/Rx Propagation Delays; 1.5ns (Max) Skew

? Operates from a Single +3.3V Supply (10 Tolerance)

? Current Limiting and Thermal Shutdown for driver Overload Protection

? Pb-Free (RoHS Compliant)

Applications

? Motor Controller/Position Encoder Systems

? Factory Automation

? Field Bus Networks

? Security Networks

? Building Environmental Control Systems

? Industrial/Process Control Networks