The ISO3086T is a 20Mbps full-duplex 2.5kVrms isolated RS-485/RS-422 transceiver with integrated transformer driver

The ISO3086T is an isolated AZ75232GTR-G1 differential line transceiver with an integrated oscillator output that supplies the primary voltage to the isolation transformer. The device is a full-duplex differential line transceiver for RS-485 and RS-422 applications that can be easily configured as a half-duplex by connecting pin 11 to pin 14 and pin 12 to pin 13 work operation.

These devices are ideal for long transmission lines because the ground return is broken to allow a larger common-mode voltage range. The device's symmetrical isolation barrier is tested to provide 1 minute of isolation per VDE at 4242 V PK between the bus transceiver and the logic level interface.

Any wired I/O can be affected by electrical noise transients from various sources. If these noise transients are of sufficient magnitude and duration, they can damage the transceiver and/or nearby sensitive circuitry. These isolation devices can significantly enhance protection and reduce the risk of damage to expensive control circuits.

ISO3086T is specified for use in the temperature range of –40°C to 85°C.


●Meets or exceeds TIA/EIA-485-A

●Signaling rate up to 20 Mbps

1/8 unit load – up to 256 nodes on the bus

● Thermal shutdown protection

Typical efficiency > 60% (I LOAD = 100 mA) - see SLUU469

Low bus capacitance 7 pF (typ)

50kV/μs typical transient immunity

Fail-safe receiver for bus open, short, idle

Logic input can withstand 5V

●Bus pin ESD protection

○11kV HBM between bus pin and GND2

○ 6kV HBM between bus pin and GND1

● Safety and regulatory approvals

○4242 V PK basic insulation according to DIN V VDE V 0884-10 and DIN EN 61010-1

○ 2500 V RMS isolation for 1 minute per UL 1577

○CSA Component Acceptance Notice 5A, IEC 60950-1 and IEC 61010-1 Standards


● Isolated RS-485/RS-422 interface

●Factory automation

● Motor/Motion Control

●HVAC and building automation networks

●Network Security Station


Type: RS-485

Data Rate (Max) (Mbps): 20

Isolation Level (Vrms): 2500

Surge Voltage Capability (Vpk): 4000

Operating temperature range (°C): -40 to 85

ISO3086T typical application circuit

ISO3086T functional block diagram