NUC121/125 Series

The series of NuMicro Family 32-bit microcontrollers based on the ARM Cortex-M0 core, equipped with rich peripherals and crystal-less USB interface.
All ICs are RoHS compliant.

* Status: P - mass production, S - samples, UD - under development, N - not recommended for new design.

Chip	Description	Application Flash	SRAM	Data Flash	Loader Flash	Programm. methods	Clock   frequency	Supply   voltage   [V]	Operating temperature [°C]	Package	Status *
NUC121LC2AE (2304 KB)	operating frequency up to 50 MHz programmable system clock source 2 external crystal oscillators and 2 internal RC oscillators PLL controller (the source of system clock up to 100 MHz) sourced from 2 high speed oscillators: crystal or RC up to 38 I/Os 4 x 32-bit timers Watchdog 32 interrupts interfaces: USCI (Universal Serial Control Interface which can be set to UART, SPI or I2C), UART, SPI, crystal-less USB 2.0 FS, 2 x I2C, I2S 24-channel 16-bit PWM, clock frequency up to 100 MHz 5 x PDMA 10-channel 12-bit ADC LDO regulator 4-level BOD with Reset function	32 KB	8 KB	configurable	4.5 KB	ISP ICP	Ext. crystal: 4 - 24 MHz 32.768 kHz Int. RC: 48 MHz 10 kHz	2.5 – 5.5	-40 – +105	LQFP-48 (7x7 mm)	P
NUC121SC2AE (2304 KB)	operating frequency up to 50 MHz programmable system clock source 2 external crystal oscillators and 2 internal RC oscillators PLL controller (the source of system clock up to 100 MHz) sourced from 2 high speed oscillators: crystal or RC up to 52 I/Os 4 x 32-bit timers Watchdog 32 interrupts interfaces: USCI (Universal Serial Control Interface which can be set to UART, SPI or I2C), UART, SPI, crystal-less USB 2.0 FS, 2 x I2C, I2S 24-channel 16-bit PWM, clock frequency up to 100 MHz 5 x PDMA 12-channel 12-bit ADC LDO regulator 4-level BOD with Reset function	32 KB	8 KB	configurable	4.5 KB	ISP ICP	Ext. crystal: 4 - 24 MHz 32.768 kHz Int. RC: 48 MHz 10 kHz	2.5 – 5.5	-40 – +105	LQFP-64 (7x7 mm)	P
NUC121ZC2AE (2304 KB)	operating frequency up to 50 MHz programmable system clock source 2 external crystal oscillators and 2 internal RC oscillators PLL controller (the source of system clock up to 100 MHz) sourced from 2 high speed oscillators: crystal or RC up to 22 I/Os 4 x 32-bit timers Watchdog 32 interrupts interfaces: USCI (Universal Serial Control Interface which can be set to UART, SPI or I2C), UART, SPI, crystal-less USB 2.0 FS, 2 x I2C, I2S 17-channel 16-bit PWM, clock frequency up to 100 MHz 5 x PDMA 4-channel 12-bit ADC LDO regulator 4-level BOD with Reset function	32 KB	8 KB	configurable	4.5 KB	ISP ICP	Ext. crystal: 4 - 24 MHz 32.768 kHz Int. RC: 48 MHz 10 kHz	2.5 – 5.5	-40 – +105	QFN-33 (5x5 mm)	P
NUC125LC2AE (2304 KB)	operating frequency up to 50 MHz programmable system clock source 2 external crystal oscillators and 2 internal RC oscillators PLL controller (the source of system clock up to 100 MHz) sourced from 2 high speed oscillators: crystal or RC up to 37 I/Os 4 x 32-bit timers Watchdog 32 interrupts interfaces: USCI (Universal Serial Control Interface which can be set to UART, SPI or I2C), UART, SPI, crystal-less USB 2.0 FS, 2 x I2C, I2S 23-channel 16-bit PWM, clock frequency up to 100 MHz 5 x PDMA 10-channel 12-bit ADC LDO regulator 4-level BOD with Reset function	32 KB	8 KB	configurable	4.5 KB	ISP ICP	Ext. crystal: 4 - 24 MHz 32.768 kHz Int. RC: 48 MHz 10 kHz	2.5 – 5.5	-40 – +105	LQFP-48 (7x7 mm)	P
NUC125SC2AE (2304 KB)	operating frequency up to 50 MHz programmable system clock source 2 external crystal oscillators and 2 internal RC oscillators PLL controller (the source of system clock up to 100 MHz) sourced from 2 high speed oscillators: crystal or RC up to 51 I/Os 4 x 32-bit timers Watchdog 32 interrupts interfaces: USCI (Universal Serial Control Interface which can be set to UART, SPI or I2C), UART, SPI, crystal-less USB 2.0 FS, 2 x I2C, I2S 23-channel 16-bit PWM, clock frequency up to 100 MHz 5 x PDMA 12-channel 12-bit ADC LDO regulator 4-level BOD with Reset function	32 KB	8 KB	configurable	4.5 KB	ISP ICP	Ext. crystal: 4 - 24 MHz 32.768 kHz Int. RC: 48 MHz 10 kHz	2.5 – 5.5	-40 – +105	LQFP-64 (7x7 mm)	P
NUC125ZC2AE (2304 KB)	operating frequency up to 50 MHz programmable system clock source 2 external crystal oscillators and 2 internal RC oscillators PLL controller (the source of system clock up to 100 MHz) sourced from 2 high speed oscillators: crystal or RC up to 22 I/Os 4 x 32-bit timers Watchdog 32 interrupts interfaces: USCI (Universal Serial Control Interface which can be set to UART, SPI or I2C), UART, SPI, crystal-less USB 2.0 FS, 2 x I2C, I2S 17-channel 16-bit PWM, clock frequency up to 100 MHz 5 x PDMA 4-channel 12-bit ADC LDO regulator 4-level BOD with Reset function	32 KB	8 KB	configurable	4.5 KB	ISP ICP	Ext. crystal: 4 - 24 MHz 32.768 kHz Int. RC: 48 MHz 10 kHz	2.5 – 5.5	-40 – +105	QFN-33 (5x5 mm)	P