Automotive-grade isolation for the BOM
The Texas Instruments ISO7741FQDBQQ1 is a 4-channel, unidirectional digital isolator using capacitive coupling, built to the AEC-Q100 automotive qualification standard. It delivers 5000Vrms galvanic isolation across a 2.25V to 5.5V supply range, with a 100Mbps data rate and propagation delay of 16ns max.
What the 5000Vrms and 85kV/µs CMTI mean for your design
The 5000Vrms isolation voltage is the reinforced-grade rating for mains-connected automotive and industrial systems — it covers the 60-second hipot test required for safety certification in traction drives and on-board chargers. The 85kV/µs minimum common-mode transient immunity (CMTI) ensures the output stays clean when a fast-switching SiC or IGBT stage couples a high dv/dt across the isolation barrier. If your gate-driver interface or CAN/SPI isolation path sees >50 kV/µs edges, this part holds the data integrity without bit errors.
Package and footprint notes
Supplied in a 16-SSOP package (3.90mm body width, 0.154" pitch), surface-mount only. The package is MSL 3 out of the bag — if the moisture barrier bag has been open past the floor-life window, a bake before reflow is required. The SSOP-16 footprint is shared with the wider ISO7741 family, so a board laid out for the SOIC-16 variant will need a different land pattern.