Overview: DATASHEET ISL32450E, ISL32452E, ISL32453E, ISL32455E, ISL32457E, ISL32458E, ISL32459E
±60V Fault Protected, 3.3V to 5V, ±20V mon-Mode Range, RS-485/RS-422 Transceivers with Cable Invert and ±15kV ESD The ISL32450E, ISL32452E, ISL32453E, ISL32455E, ISL32457E, ISL32458E, and ISL32459E are 3.3V to 5V powered, fault protected, extended mon-Mode Range (CMR) differential transceivers for balanced munication. The RS-485 bus pins (driver outputs and receiver inputs) are protected against overvoltages up to ±60V, protected against ±15kV ESD strikes, and immune to ±4kV IEC61000-4-4 EFT transients without latch-up. These transceivers operate in environments with mon-mode voltages up to ±20V (exceeds the RS-485 requirement), making this RS-485 family one of the most robust on the market.
The transmitters are RS-485 pliant with VCC ≥ 4.5V and deliver a 1.1V differential output voltage into the RS-485 specified 54Ω load even with VCC = 3V. The receiver (Rx) inputs feature a full fail-safe design that ensures a logic-high Rx output if the Rx inputs are floating, shorted, or on a terminated but undriven (idle) bus. The Rx full fail-safe operation is maintained even when the Rx input polarity is switched (cable invert function on ISL32457E and ISL32459E).
The ISL32457E and ISL32459E include a cable invert function that reverses the polarity of the Rx and Tx bus pins in case the cable is misconnected during installation.
