ISOW7821 Reinforced Digital Isolators Texas Instruments ISOW7821 Reinforced Digital Isolators are high-performance, dual-channel digital isolators with an integrated high-efficiency power converter. The integrated DC-DC converter provides up to 650mW of isolated power at high efficiency and can be configured for various input and output voltage configurations. Therefore this device eliminates the need for a separate isolated power supply in space-constrained isolated designs.