8-bit Microcontrollers - MCU

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MS51 Industrial Series Microcontrollers (MCUs)

Nuvoton MS51 Industrial Series Microcontrollers (MCUs) are 8-bit, high-performance, embedded Flash type, and 80C51 standard compatible MCUs based on a 1T 8051 core. These MCUs feature 32Kbyte of Flash memory, up to 2Kbyte of SRAM, and 8Kbytes of main Flash (APROM). The MS51 MCUs' Flash supports the In-Application-Programming (IAP) function that enables on-chip firmware updates. These MCUs support a function of configurable Flash from APROM called LDROM, in which the Boot code resides for carrying out In-System-Programming (ISP). To reduce power consumption, the MS51 MCUs offer idle and power-down modes that are software selectable.

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Image	Part #	Mfr.	Description	Datasheet	Availability	Pricing (USD) Filter the results in the table by unit price based on your quantity.	Qty.	Core	Program Memory Size	Data RAM Size	Package/Case	Maximum Clock Frequency	ADC Resolution	Number of I/Os	Supply Voltage - Min	Supply Voltage - Max	Mounting Style	Data Bus Width	Minimum Operating Temperature	Maximum Operating Temperature	Packaging
8-bit Microcontrollers - MCU 8K Bytes Shared with LDROM MS51DA9AE Nuvoton 1: $1.74 950In Stock	Mfr. Part No. MS51DA9AE Mouser Part No 503-MS51DA9AE	Nuvoton	8-bit Microcontrollers - MCU 8K Bytes Shared with LDROM Learn More about Nuvoton ms51 industrial mcus	Datasheet	950In Stock	$1.74 $1.06 $0.889 $0.673 View $0.582 $0.511 $0.435 $0.385 $0.376	Min.: 1 Mult.: 1	8051	8 kB	1 kB	TSSOP-14	24 MHz	12 bit	12 I/O	2.4 V	5.5 V	SMD/SMT	8 bit	- 40 C	+ 105 C	Tube
8-bit Microcontrollers - MCU 16K Bytes Shared with LDROM MS51BA9AE Nuvoton 1: $0.70 534In Stock	Mfr. Part No. MS51BA9AE Mouser Part No 503-MS51BA9AE	Nuvoton	8-bit Microcontrollers - MCU 16K Bytes Shared with LDROM Learn More about Nuvoton ms51 industrial mcus	Datasheet	534In Stock	$0.70 $0.602 $0.51 $0.481 View $0.436 $0.412 $0.402	Min.: 1 Mult.: 1	8051	8 kB	1 kB	MSOP-10	24 MHz	12 bit	8 I/O	2.4 V	5.5 V	SMD/SMT	8 bit	- 40 C	+ 105 C	Tube
8-bit Microcontrollers - MCU 16K Bytes Shared with LDROM MS51FB9AE Nuvoton 1: $1.40 85In Stock 5,106On Order	Mfr. Part No. MS51FB9AE Mouser Part No 503-MS51FB9AE	Nuvoton	8-bit Microcontrollers - MCU 16K Bytes Shared with LDROM Learn More about Nuvoton ms51 industrial mcus	Datasheet	85In Stock 5,106On Order On Order Ship Dates Mfr. No: MS51FB9AE Stock: 85 Can Dispatch Immediately On Order: 1,480 Expected 19/11/2026 1,036 Expected 30/11/2026 2,590 Expected 01/12/2026 Factory Lead Time: 40 Weeks	Cut Tape $1.40 $0.938 $0.792 Reel $0.792 $0.648 View $0.594 $0.516 $0.484 $0.406	Min.: 1 Mult.: 1 : 74	8051	16 kB	1 kB	TSSOP-20	24 MHz	12 bit	18 I/O	2.4 V	5.5 V	SMD/SMT	8 bit	- 40 C	+ 105 C	Reel, Cut Tape
8-bit Microcontrollers - MCU 32K Bytes Shared with LDROM MS51FC0AE Nuvoton 1: $0.86 744In Stock	Mfr. Part No. MS51FC0AE Mouser Part No 503-MS51FC0AE	Nuvoton	8-bit Microcontrollers - MCU 32K Bytes Shared with LDROM Learn More about Nuvoton ms51 industrial mcus	Datasheet	744In Stock	$0.86 $0.737 $0.627 $0.592 View $0.537 $0.523 $0.491 $0.48	Min.: 1 Mult.: 1	8051	32 kB	2 kB	TSSOP-20	24 MHz	12 bit	18 I/O	2.4 V	5.5 V	SMD/SMT	8 bit	- 40 C	+ 105 C	Tube
8-bit Microcontrollers - MCU 32K Bytes Shared with LDROM MS51PC0AE Nuvoton 1: $1.26 666In Stock	Mfr. Part No. MS51PC0AE Mouser Part No 503-MS51PC0AE	Nuvoton	8-bit Microcontrollers - MCU 32K Bytes Shared with LDROM Learn More about Nuvoton ms51 industrial mcus	Datasheet	666In Stock	$1.26 $1.08 $0.94 $0.888 View $0.826 $0.785 $0.73 $0.691 $0.672	Min.: 1 Mult.: 1	8051	32 kB	2 kB	LQFP-32	24 MHz	12 bit	30 I/O	2.4 V	5.5 V	SMD/SMT	8 bit	- 40 C	+ 105 C	Tray
8-bit Microcontrollers - MCU 32K Bytes Shared with LDROM MS51TC0AE Nuvoton 1: $0.99 975In Stock	Mfr. Part No. MS51TC0AE Mouser Part No 503-MS51TC0AE	Nuvoton	8-bit Microcontrollers - MCU 32K Bytes Shared with LDROM Learn More about Nuvoton ms51 industrial mcus	Datasheet	975In Stock	$0.99 $0.847 $0.744 $0.703 View $0.622 $0.592 $0.591 $0.57 $0.564	Min.: 1 Mult.: 1	8051	32 kB	2 kB	QFN-33	24 MHz	12 bit	30 I/O	2.4 V	5.5 V	SMD/SMT	8 bit	- 40 C	+ 105 C	Tray
8-bit Microcontrollers - MCU 16K Bytes Shared with LDROM 0.4mm Pitch width MS51XB9AE Nuvoton 1: $0.65 627In Stock	Mfr. Part No. MS51XB9AE Mouser Part No 503-MS51XB9AE	Nuvoton	8-bit Microcontrollers - MCU 16K Bytes Shared with LDROM 0.4mm Pitch width Learn More about Nuvoton ms51 industrial mcus	Datasheet	627In Stock	$0.65 $0.557 $0.491 $0.464 View $0.408 $0.387 $0.366 $0.356	Min.: 1 Mult.: 1	8051	16 kB	1 kB	QFN-20	24 MHz	12 bit	18 I/O	2.4 V	5.5 V	SMD/SMT	8 bit	- 40 C	+ 105 C	Tray
8-bit Microcontrollers - MCU 32K Bytes Shared with LDROM MS51EC0AE Nuvoton 1: $1.05 Non-Stocked Lead-Time 40 Weeks	Mfr. Part No. MS51EC0AE Mouser Part No 503-MS51EC0AE	Nuvoton	8-bit Microcontrollers - MCU 32K Bytes Shared with LDROM Learn More about Nuvoton ms51 industrial mcus	Datasheet	Non-Stocked Lead-Time 40 Weeks	$1.05 $0.898 $0.788 $0.72 View $0.659 $0.658	Min.: 1 Mult.: 1	8051	32 kB	2 kB	TSSOP-28	24 MHz	12 bit	26 I/O	2.4 V	5.5 V	SMD/SMT	8 bit	- 40 C	+ 105 C	Tube
8-bit Microcontrollers - MCU 16K Bytes Shared with LDROM MS51FB9AE TR Nuvoton 1: $2.01 Non-Stocked Lead-Time 40 Weeks	Mfr. Part No. MS51FB9AE TR Mouser Part No 503-MS51FB9AETR	Nuvoton	8-bit Microcontrollers - MCU 16K Bytes Shared with LDROM Learn More about Nuvoton ms51 industrial mcus	Datasheet	Non-Stocked Lead-Time 40 Weeks	Cut Tape $2.01 $1.23 $1.04 $0.782 View Reel $0.456 $0.677 $0.594 $0.533 $0.456 MouseReel Available	Min.: 1 Mult.: 1 : 2,500	8051	16 kB	1 kB	TSSOP-20	24 MHz	12 bit	18 I/O	2.4 V	5.5 V	SMD/SMT	8 bit	- 40 C	+ 105 C	Reel, Cut Tape, MouseReel
8-bit Microcontrollers - MCU 16K Bytes Shared with LDROM 0.5mm Pitch width MS51XB9BE Nuvoton 1: $1.60 Non-Stocked Lead-Time 40 Weeks	Mfr. Part No. MS51XB9BE Mouser Part No 503-MS51XB9BE	Nuvoton	8-bit Microcontrollers - MCU 16K Bytes Shared with LDROM 0.5mm Pitch width Learn More about Nuvoton ms51 industrial mcus	Datasheet	Non-Stocked Lead-Time 40 Weeks	$1.60 $0.973 $0.818 $0.62 View $0.537 $0.47 $0.402 $0.378	Min.: 1 Mult.: 1	8051	16 kB	1 kB	QFN-20	24 MHz	12 bit	18 I/O	2.4 V	5.5 V	SMD/SMT	8 bit	- 40 C	+ 105 C	Tray

MS51 Industrial Series Microcontrollers (MCUs)

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