Intersil – ISL32740E/41E: High-Speed RS-485 Transceivers with Highest Reinforced Isolation

The ISL3274xE is a family of high-speed, isolated RS-485 differential bus transceivers that provide 40Mbps bidirectional data communication for Industrial Internet of Things (IIoT) networks. The ISL32741E offers 1,000VRMS working voltage and 6kV of reinforced isolation, more than 2x higher than competitive solutions. The higher working voltage and reinforced isolation is required for today’s most rigorous medical and high-speed motor control applications. The ISL32740E with 2.5kV of isolation and 600VRMS working voltage comes in the industry’s smallest package, enabling high channel density for programmable logic controllers (PLCs) in factory automation applications.


  • 40Mbps data rate
  • 5ns pulse skew and 20ns propagation delay
  • 50kV/μs (typ), 30kV/μs (min) common-mode transient immunity
  • 15kV ESD bus-pin protection
  • PROFIBUS compliant
  • 3V to 5V power supplies
  • Single unit load allows up to 160 devices on the bus
  • 44,000 years barrier lifetime
  • Thermal shutdown protection
  • 1k MSRP: $3.79 to $4.49 US