USB host on an SPI bus — the 32-TQFN integration story
The MAX3421EETJ+T is a USB 2.0 host/peripheral controller that communicates over an SPI interface, letting any MCU with a spare SPI port act as a USB host without needing a dedicated USB controller core.
Sourcing and compliance documentation
Cut Tape works for prototype runs and small-batch builds. ROHS3 compliance is confirmed on the manufacturer's listing; additional compliance documentation (REACH, conflict minerals, material declaration) is maintained by Analog Devices and can be provided at RFQ.