Robust low-power quad-channel digital isolator series offers options

The low-power Texas Instruments ISO7340 quad-channel 2/2 digital isolator has four forward isolated channels comprised of logic input and output buffers separated by a silicon dioxide (SiO2) insulation barrier. The ISO7341 has three forward and one reverse-direction channels; and the ISO7342 has two forward and two reverse-direction channels. In case of input power or signal loss, default output is 'low' for devices with suffix 'F' and 'high' for devices without suffix 'F'. 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. The ISO734x has integrated noise filtering for harsh industrial environment where short noise pulses may be present at the device input pins. ISO734x has TTL input thresholds and operates from 3V to 5.5V supply levels. Through innovative chip design and layout techniques, electromagnetic compatibility of ISO734x has been significantly enhanced to enable system-level ESD, EFT, surge and emissions compliance. The ISO734x quad-channel 2/2 digital isolator provide galvanic isolation up to 3000 VRMS for one minute as per UL and 4242VPK as per VDE, says the company.