Overview: Fault Protected, Extended CMR, RS-485/RS-422 Transceivers with Cable Invert ISL31480E, ISL31483E, ISL31485E, ISL31486E The ISL3148xE are fault protected, 5V powered differential transceivers that exceed the RS-485 and RS-422 standards for balanced munication. The RS-485 transceiver pins (driver outputs and receiver inputs) are fault protected up to ±60V. Additionally, the extended mon mode range allows these transceivers to operate in environments with mon mode voltages up to ±25V (>2X the RS-485 requirement), making this fault protected RS-485 family one of the most 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 network 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.
The ISL31483E, ISL31485E and ISL31486E include cable invert functions that reverse the polarity of the Rx and/or Tx bus pins in case the cable is misconnected. Unlike peting devices, Rx full fail-safe operation is maintained even when the Rx input polarity is switched.
The ISL31480E and ISL31486E feature a logic supply (VL) pin that sets the VOH of the Rx outputs, and the switching points of the logic input pins, to be patible with a lower supply voltage (down to 1.8V) in mixed voltage systems.
