The ISO7741TA is a high-performance, quad-channel digital isolator with integrated transformer driver with 5000VRMS isolation ratings per UL 1577. The ISO7741T device provides 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 a double capacitive silicon dioxide (SiO₂) insulation barrier. If the input power or signal is lost, default output is high for devices without suffix F and low for devices with suffix F.

The ISO7741TA includes a low-noise, low-EMI push-pull transformer driver, specifically designed for small form factor, isolated power supplies. The transformer driver drives low-profile, center-tapped transformers from a 2.25V to 5.5V DC power supply. Very low noise and EMI are achieved by slew rate control of the output switch voltage and through Spread Spectrum Clocking (SSC). The transformer driver consists of an oscillator followed by a gate drive circuit that provides the complementary output signals to drive ground-referenced N-channel power switches. The two N-channel Power-MOSFET switches are rated 1A to support start-up under high loads. The internal protection features include a 1.7A current limiting, under-voltage lockout, thermal shutdown, and break-before-make circuitry. ISO7741TA include a soft-start feature that prevents high inrush current during power up with large load capacitors. ISO7741TA has a 160kHz internal oscillator to minimize emissions whereas while keeping smaller transformer size. The ISO7741TA is available in a 16-pin DW package. The device operation is characterized for a temperature range from -40°C to 125°C.