80 MHz Cortex-M4 with 512 KB Flash in a 3.36×3.66 mm WLCSP
The STM32L452REY6PTR: Connectivity covers CANbus, I²C, SPI, UART/USART, USB, QSPI, and SAI — enough for industrial fieldbus bridging or audio codec interfaces. The 52 I/O lines and 16-channel 12-bit ADC give it the analog front-end reach for multi-sensor acquisition.
End-of-life — plan the BOM transition now
80 MHz — what it means for the application
The 80 MHz Cortex-M4 core with single-cycle multiply and hardware divide handles real-time control loops — motor commutation, digital power conversion, or audio processing — without needing an external DSP. The 160 KB SRAM leaves headroom for double-buffered ADC data and a modest RTOS heap. If your algorithm needs floating-point throughput, the M4 FPU is there; if it doesn't, the 80 MHz still beats a Cortex-M3 at the same clock on integer tasks.
Temperature grade and environment
Rated for -40°C to 85°C ambient, this MCU fits industrial enclosures, outdoor telecom cabinets, and automotive cabin environments (non-engine-bay). The internal oscillator and brown-out detect keep it running through supply dips without an external supervisor.