Integrated isolated power in a single SOIC-20 package
The Texas Instruments ISOW7741QDFMRQ1 is a quad-channel, unidirectional digital isolator from the ISOW774x-Q1 family that integrates an isolated DC/DC converter on-chip. This means the device provides both signal isolation and an isolated output supply rail from a single 20-SOIC package — no separate isolated power module needed on the board. Rated for 5000 Vrms isolation with a minimum common-mode transient immunity of 85 kV/µs, it handles the noise environment of automotive motor drives, on-board chargers, and high-voltage battery monitoring without corrupting the data stream.
100 Mbps data rate and propagation delay budget
Maximum propagation delay is 15.7 ns in both directions; pulse-width distortion is 5 ns max. The 3/1 input-to-output channel configuration suits asymmetric data links like isolated SPI or CAN FD.
Dual-supply range and power rail flexibility
The integrated isolated power output tracks the input-side supply; decouple with a ceramic capacitor on each supply pin close to the package. Surface-mount in the 20-SOIC (7.50 mm width) package, MSL 3.