RA2E1 entry-level MCU for cost-sensitive control
The R7FA2E1A53CNH#AA0 is a 32-bit ARM Cortex-M23 MCU from the RA2E1 series, clocked at 48 MHz. It has 32 KB Flash, 16 KB RAM, and 4 KB EEPROM on-chip.
The 10-channel 12-bit SAR ADC handles analog inputs from thermistors, pressure transducers, or current shunts without an external converter. On the security side, the hardware AES accelerator and true random number generator (TRNG) save code space for encrypted communication — a plus for IoT edge nodes that need to authenticate firmware updates.
Renesas lists this part as Active, and it is ROHS3 compliant. For dual-sourcing or a drop-in alternate, the R7FA2E1A52DNH#AA0 shares the same core, memory, and peripherals but is rated to 85°C instead of 105°C — check your ambient before swapping.