32 MHz Cortex-M23 — secure IoT edge node engine
The Microchip ATSAML11D15A-MFT is a 32-bit single-core ARM Cortex-M23 microcontroller from the SAM L11 series, built for applications where security and extended temperature range are non-negotiable. The Cortex-M23 core runs at 32 MHz and includes ARM TrustZone for hardware-enforced isolation — a feature that typically lives on higher-end parts but is available here in a compact 24-VFQFN package with 17 I/O lines.
Full industrial temperature range — -40 to 125°C
The 5-channel 12-bit ADC and single 10-bit DAC cover analog front-end needs. Internal oscillator means no external crystal for basic operation, though you can feed an external clock if the application needs tighter timing.
ROHS3 compliant. For a security-focused MCU that you plan to qualify into a five-to-ten-year production run, this is the right lifecycle posture — no looming obsolescence to budget around.