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Nuvoton Launches NuMicro® Low Power ML51 Series Microcontroller

Hsinchu, Taiwan2019/02/27-Nuvoton Technology Corp., a leading microcontroller provider, announces the NuMicro® low power enhanced 1T 8051 based ML51 series microcontroller. NuMicro® ML51 series supports power down current below 1uA, power consumption is down to 80 µA / MHz in normal run mode. This series offers a range of memory with 16 / 32 / 64 KB Flash memory and 1 / 2 / 4 KB SRAM, provides packages types from 10 to 64 pins, a wide operating continuous voltage range 1.8 V ~ 5.5 V and - 40 °C ~ + 105 °C temperature operation.


NuMicro® ML51 series offers four power modes: normal run mode, low power run mode, low power idle mode and power down mode with flexible wake-up sources to achieve the lowest possible power consumption. Both low power run mode and low power idle mode run at 38.4 kHz LIRC ( with + / - 1 % accuracy at room temperature ), and allow UART up to 9600 baud rate in these two low power operation modes; the power consumption in low power idle mode is down to 13 uA and in power down mode the leakage current is less than 1 uA. 


NuMicro® ML51 series supports up to 24 MHz operation frequency and have several enhanced features, such as up to 8 channels of 12-bit ADC, four levels of internal reference voltage, analog comparator for comparing voltage rapidly and Direct Memory Access ( DMA ) controller for power saving and speed up data transfer; NuMicro® ML51 also provides rich peripherals such as 2 sets of UART; 2 sets of smart card interface; 2 sets of I²C, 2 sets of SPI, and higher than 20 mA driving capability for each IO pin.


To protect customer’s intellectual property, the ML51 series provides several mechanisms, by using flash lock bit can prevent program from being read out by external programmer, 128 Bytes SPROM ( Secure Protection ROM ), 96-bit UID ( Unique Identification ), 128-bit UCID ( Unique Customer Identification ).  


The NuMicro® ML51 series provides large portfolio, versatile high performance analog circuits, with its low power features will be eligible for many kinds of applications.


Development Tools
Nuvoton provides easy-to-use development tools such as Nu-Link / Nu-Link-Pro / Nu-Link2, which supports advanced debug function, PinConfig for multi-function pin setting, PinView for showing pin status in real time, BSP driver and sample codes. The IDE supports Keil C-51 and IAR EW8051, which can debug, trace and analyze your program on the development board.

NK‐ML51 evaluation board is available online now for 100% emulation and on‐board debugging.

Packaging and Availability
The NuMicro® ML51 series with 16~32KB flash microcontrollers are MP now, offers several packages including MSOP10, TSSOP14, TSSOP20, QFN20, TSSOP28, QFN33, and LQFP32.

The ML51 series microcontrollers and its development tools can be ordered from Nuvoton’s official online store:

About Nuvoton Technology
Nuvoton Technology Corporation ( NTC ) was founded to bring innovative semiconductor solutions to the market. NTC was spun-off as a Winbond Electronics affiliate in July 2008 and became public in September 2010 on the Taiwan Stock Exchange ( TSE ). Nuvoton Technology focuses on development of analog/mixed signal, microcontroller, cloud and computing products and has strong market share in Industrial, Consumer and Computer markets. Nuvoton owns a wafer fab, featuring customized processes for analog, power and MCU products. Besides in-house IC products, the wafer fab also provides part of its capacity for foundry services. Nuvoton Technology provides products with a high performance/cost ratio for its customers by leveraging flexible technology, advanced design capability and integration of digital and analog technologies. Nuvoton values long term relationships with its partners and customers and is dedicated to continuous innovation of its products, processes and services. The company has established subsidiaries in the USA, China, Israel and India to strengthen regional customer support and global management. For more information, please visit

*Note: Nuvoton and NuMicro are registered trademarks of Nuvoton Technology Corporation. All other trademarks and copyrights mentioned herein are the property of their respective owners.


Product Contact

Ryan Huang

Director of Microcontroller Marketing Div.

Nuvoton Technology Corporation


Tel: +886-3-5770066 ext. 38024


News Contact

Carol Chang

Nuvoton Technology Corporation


Tel: +886-3-5770066 ext. 33123

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