ISO672x/ISO672x-Q1 Digital Isolators Texas Instruments ISO672x/ISO672x-Q1 Dual-Channel Digital Isolators are ideal for cost-sensitive applications requiring up to 3000VRMS (D package) isolation ratings per UL 1577. These devices are also certified by VDE, TUV, CSA, and CQC. The ISO672x/ISO672x-Q1 devices provide high electromagnetic immunity and low emissions at low power consumption while isolating CMOS or LVCMOS digital I/Os. Each isolation channel has a logic input and output buffer separated by TI’s double capacitive silicon dioxide (SiO2) insulation barrier. The ISO672xB/ISO672xB-Q1 device has 2 isolation channels with 1 channel in each direction. In the event of input power or signal loss, the default output is high for devices without suffix F and low for devices with suffix F.