Intersil – ISL32704E: Industry’s Smallest Isolated RS-485 Transceiver


The ISL32704E RS-485 transceiver leverages giant magnetoresistance (GMR) technology to provide galvanic isolation that keeps the communication bus free from common mode noise generated in electrically noisy factory and building automation environments. The ISL32704E is ideally suited for the equipment to bus interface in IIoT networks that connect programmable logic controllers (PLCs) to instruments, robots, motor drives, data acquisition and digital I/O modules. The advantage of Intersil’s ISL32704E GMR isolation over other isolation technologies is its low radiated emission and low EMI susceptibility.

• 4Mbps data rate
• 3V to 5V power supplies
• 50kV/μs (typ), 30kV/μs (min) common mode transient immunity
• 15kV ESD bus-pin protection
• Meets or exceeds ANSI RS-485 standard
• VDE V0884-11 certification pending
• 2.5kVRMS isolation per UL 1577 standard
• Single unit load allows up to 32 devices on the bus
• Offers a barrier lifetime of 44,000 years
• Thermal shutdown protection
• -40°C to +85°C operating temperature
• 1k MSRP: $3.79 US