What the integrated isolated power means for your BOM
The ISOW7742QDFMRQ1 is a Texas Instruments automotive-grade quad-channel digital isolator that integrates the isolated DC-DC converter on-chip.
Channel configuration and data path
Four unidirectional channels arranged as two inputs on side 1 and two inputs on side 2, giving a 2/2 split that suits bidirectional data flows like SPI or UART isolation where both sides need to transmit. The 100Mbps data rate handles fast serial interfaces without timing margin issues. Propagation delay is a symmetrical 15.7ns max for both low-to-high and high-to-low transitions, with pulse-width distortion held to 5ns max — tight enough to keep duty-cycle errors under control for PWM signals.
85kV/µs CMTI — why it matters in motor drives
Common-mode transient immunity of 85kV/µs minimum means the output won't glitch when fast-switching IGBTs or SiC MOSFETs slam the isolation barrier with high dV/dt. In an automotive traction inverter or on-board charger, this margin prevents false triggering on the controller side during PWM commutation events.
Dual supply ranges for flexible rail assignment
The integrated isolated power converter generates the secondary-side rail from the primary-side input, so no external isolated bias supply is needed.
AEC-Q100 qualification and production status
AEC-Q100 qualified for automotive applications, which covers the stress tests required for PPAP submission in Tier-1 programs. The 20-SOIC wide-body package (7.50mm width) provides the creepage distance needed for 5000Vrms reinforced insulation.