The IL3685-1E PROFIBUS-compatible, galvanically isolated RS-485 transceiver from NVE offers data rate of 40Mbps and is designed for bidirectional data communication on balanced transmission lines, while being fully compliant with PROFIBUS specifications, including the differential output voltage. The IL3685 series is compatible with 3V and 5V power supplies. A unique ceramic/polymer composite barrier provides excellent isolation and virtually unlimited barrier life. This particular device uses NVE’s patented IsoLoop spintronic Giant Magnetoresistance (GMR) technology and comes in an ultraminiature QSOP package.

• Surface-mount PROFIBUS-compatible galvanically isolated RS-485 transceiver
• 3V and 5V power supplies
• Data rate of 40Mbps
• 15kV bus ESD protection
• Isolation of 2.5kV_RMS per VDE V 0884-10
• Working voltage of 600V_RMS per VDE V 0884-10
• Temperature range of −40°C to +85°C
• Typical common mode transiend immunity of 50kV/μs (30kV/μs minimum)
• Propagation delay as low as 20ns
• Thermal shutdown protection
• UL 1577 recognised, VDE V 0884-10 certified; meets or exceeds ANSI RS-485 and ISO 8482:1987(E)
• Ultraminiature QSOP package

The IL3685 has current limiting and thermal shutdown features to protect against output short circuits and bus contentions that may cause excessive power dissipation, and also incorporate a “fail-safe if open” design, ensuring a logic high on R if the bus lines are disconnected or “floating.”

Typical applications for the IL3685 series include:

• PROFIBUS, PROFIBUS DP and FMS networks
• Factory automation
• Industrial control networks
• Building environmental controls
• Equipment covered under IEC 61010-1 Edition 3

The below table gives the recommended operating conditions for the NVE IL3685 isolated RS-485 transceiver series, including IL3685-1E: