Low-power dual-channel digital isolator with superior EMC performance

This post is sponsored by Texas Instruments. The Texas Instruments (TI) ISO732x series low-power dual-channel digital isolators provide galvanic isolation up to 3000 VRMS for one minute as per UL and 4242 VPK per VDE. The devices have two isolated channels comprised of logic input and output buffers separated by silicon dioxide (SiO2) insulation barriers. The ISO7320 has both channels in the same direction while ISO7321 has the two channels in opposite direction. In case of input power or signal loss, default output is 'low' for devices with suffix 'F' and 'high' for devices without suffix 'F'. See Device Functional Modes for further details. Used in conjunction with isolated power supplies, the devices prevent noise currents on a data bus or other circuits from entering the local ground and interfering with or damaging sensitive circuitry. ISO732x have integrated noise filters for harsh industrial environment where short noise pulses may be present at the device input pins. ISO732x have TTL input thresholds and operate from 3V to 5.5V supply levels. Through innovative chip design and layout techniques, electromagnetic compatibility characteristics of the ISO732x have been significantly enhanced to enable system-level ESD, EFT, Surge and Emissions compliance, says the company.