Low-power quad-channel 2/2 digital isolator protects sensitive circuitry

The ISO734x low-power quad-channel 2/2 digital isolator from Texas Instruments (TI) provides galvanic isolation up to 3000Vrms for one minute as per UL and 4242 VPK per VDE. The devices have four isolated channels comprised of logic input and output buffers separated by a silicon dioxide (SiO2) insulation barrier. The ISO7340 has four channels in forward direction. The ISO7341 has three forward and one reverse-direction channels. The ISO7342 has two forward and two reverse-direction channels. 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. Through innovative chip design and layout techniques, electromagnetic compatibility has been significantly enhanced to enable system-level ESD, EFT, surge and emissions compliance.