NuMicro® M251/M252 Microcontrollers

Nuvoton NuMicro® M251/M252 Microcontrollers are a low-power platform based on the Arm® Cortex®-M23 core for Armv8-M architecture. The MCUs operate up to 48MHz with 32Kbytes to 256Kbytes embedded Flash memory, 8Kbytes to 32Kbytes embedded SRAM, and 4Kbytes Flash loader memory (LDROM) for InSystem Programming (ISP). The 32-bit microcontrollers provide a wide supply voltage from 1.75V to 5.5V and an operating temperature range from -40°C to +105°C.

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Description Datasheet Availability Pricing (EUR) Filter the results in the table by unit price based on your quantity.
Qty. RoHS ECAD Model Mounting Style
Package/Case
Core
Program Memory Size
Data Bus Width
ADC Resolution
Maximum Clock Frequency
Number of I/Os
Data RAM Size
Supply Voltage - Min
Supply Voltage - Max
Minimum Operating Temperature
Maximum Operating Temperature
Packaging
Nuvoton ARM Microcontrollers - MCU M23-64Kflash+12KRAM+UART+SPI+I2C+PWM+ADC+RTC
Datasheet
7In Stock
490Expected 7/21/2026
Min.: 1
Mult.: 1

SMD/SMT QFN-33 ARM Cortex M23 64 kB 32 bit 12 bit 48 MHz 26 I/O 12 kB 1.75 V 5.5 V - 40 C + 105 C Tray
Nuvoton ARM Microcontrollers - MCU M23-256Kflash+32KRAM+UART+SPI+I2C+PWM+ADC+USB+RTC
Datasheet
195In Stock
Min.: 1
Mult.: 1

SMD/SMT LQFP-64 ARM Cortex M23 256 kB 32 bit 12 bit 48 MHz 49 I/O 32 kB 1.75 V 5.5 V - 40 C + 105 C Tray
Nuvoton ARM Microcontrollers - MCU M23-64Kflash+12KRAM+UART+SPI+I2C+PWM+ADC+USB+RTC
Datasheet
450Expected 5/27/2026
Min.: 1
Mult.: 1

SMD/SMT LQFP-48 ARM Cortex M23 64 kB 32 bit 12 bit 48 MHz 37 I/O 12 kB 1.75 V 5.5 V - 40 C + 105 C Tray
Nuvoton ARM Microcontrollers - MCU M23-256Kflash+32KRAM+UART+SPI+I2C+PWM+ADC+RTC
Datasheet
Non-Stocked Lead-Time 32 Weeks
Min.: 1
Mult.: 1

SMD/SMT LQFP-128 ARM Cortex M23 256 kB 32 bit 12 bit 48 MHz 85 I/O 32 kB 1.75 V 5.5 V - 40 C + 105 C Tray
Nuvoton ARM Microcontrollers - MCU M23-64Kflash+12KRAM+UART+SPI+I2C+PWM+ADC+RTC
Datasheet
Non-Stocked Lead-Time 32 Weeks
Min.: 1
Mult.: 1

SMD/SMT LQFP-48 ARM Cortex M23 64 kB 32 bit 12 bit 48 MHz 41 I/O 12 kB 1.75 V 5.5 V - 40 C + 105 C Tray
Nuvoton ARM Microcontrollers - MCU M23-256Kflash+32KRAM+UART+SPI+I2C+PWM+ADC+RTC
Datasheet
Non-Stocked Lead-Time 32 Weeks
Min.: 1
Mult.: 1

SMD/SMT LQFP-48 ARM Cortex M23 256 kB 32 bit 12 bit 48 MHz 41 I/O 32 kB 1.75 V 5.5 V - 40 C + 105 C Tray
Nuvoton ARM Microcontrollers - MCU M23-256Kflash+32KRAM+UART+SPI+I2C+PWM+ADC+RTC
Datasheet
Non-Stocked Lead-Time 32 Weeks
Min.: 1
Mult.: 1

SMD/SMT LQFP-64 ARM Cortex M23 256 kB 32 bit 12 bit 48 MHz 53 I/O 32 kB 1.75 V 5.5 V - 40 C + 105 C Tray
Nuvoton ARM Microcontrollers - MCU M23-256Kflash+32KRAM+UART+SPI+I2C+PWM+ADC+USB+RTC
Datasheet
Non-Stocked Lead-Time 32 Weeks
Min.: 1
Mult.: 1

SMD/SMT LQFP-128 ARM Cortex M23 256 kB 32 bit 12 bit 48 MHz 81 I/O 32 kB 1.75 V 5.5 V - 40 C + 105 C Tray
Nuvoton ARM Microcontrollers - MCU M23-32Kflash+8KRAM+UART+SPI+I2C+PWM+ADC+USB+RTC
Datasheet
Non-Stocked Lead-Time 32 Weeks
Min.: 1
Mult.: 1

SMD/SMT LQFP-48 ARM Cortex M23 32 kB 32 bit 12 bit 48 MHz 37 I/O 8 kB 1.75 V 5.5 V - 40 C + 105 C Tray
Nuvoton ARM Microcontrollers - MCU M23-64Kflash+12KRAM+UART+SPI+I2C+PWM+ADC+USB+RTC
Datasheet
Non-Stocked Lead-Time 32 Weeks
Min.: 1
Mult.: 1

SMD/SMT LQFP-64 ARM Cortex M23 64 kB 32 bit 12 bit 48 MHz 50 I/O 12 kB 1.75 V 5.5 V - 40 C + 105 C Tray
Nuvoton ARM Microcontrollers - MCU M23-64Kflash+12KRAM+UART+SPI+I2C+PWM+ADC+USB+RTC
Datasheet
Non-Stocked Lead-Time 32 Weeks
Min.: 1
Mult.: 1

SMD/SMT QFN-33 ARM Cortex M23 64 kB 32 bit 12 bit 48 MHz 22 I/O 12 kB 1.75 V 5.5 V - 40 C + 105 C Tray