A leading supplier of 8051 compatible microcontrollers, Nuvoton offers a wide range of parts that meets the price/performance demand of industrial and consumer products OEMs. The 8-bit μCs are supported by leading tool makers for rapid product development. ROM-less, ROM and Flash types are available with a rich set of I/O such as PWM, GPIO, DPTR, PCA Timers, ADC and more. 4T, 6T and 12T cores running at up to 40MHz provide one of the industry's best choices of 8051 μCs.

	Standard Parts Part No. ROM Type ROM(Byte) RAM(Byte) I/O Pins External Memory Space(Byte) Speed MHz Timer/ Counter Int ISP/ ICP Special Function PACKAGE W78E051C Flash EPROM 4K 128 32/36 64K 40 2 5/7 - -Extra I/O Port,/INT2, /INT3 -WDT PDIP40/ PLCC44/ PQFP44 W78E051D Flash EPROM 4K 128 32/36 64K 40 2 5/7 ISP -Extra I/O Port,/INT2,/INT3 -WDT PDIP40/ PLCC44/ PQFP44 W78E052C Flash EPROM 8K 256 32/36 64K 40 3 6/8 - -Extra I/O Port,/INT2,/INT3 -WDT PDIP40/ PLCC44/ PQFP44 W78E052D Flash EPROM 8K 256 32/36 64K 40 3 6/8 ISP -Extra I/O Port,/INT2,/INT3 -WDT PDIP40/ PLCC44/ PQFP44 W78E054C Flash EPROM 16K 256 32/36 64K 40 3 6/8 - -Extra I/O Port,/INT2,/INT3 -WDT PDIP40/ PLCC44/ PQFP44 W78E054D Flash EPROM 16K 256 32/36 64K 40 3 6/8 ISP -Extra I/O Port,/INT2,/INT3 -WDT PDIP40/ PLCC44/ PQFP44 W78E058B Flash EPROM 32K 256 32/36 64K 40 3 6/8 ISP -In-system Programming-Extra I/O Port, / INT2, /INT3 PDIP40/ PLCC44/ PQFP44 W78E058D Flash EPROM 32K 256 32/36 64K 40 3 6/8 ISP -In-system Programming-Extra I/O Port, / INT2, /INT3-WDT PDIP40/ PLCC44/ PQFP44 W78E516B Flash EPROM 64K 512 32/36 64K 40 3 6/8 ISP -In-system Programming-Extra I/O Port, / INT2, /INT3 PDIP40/ PLCC44/ PQFP44 W78E516D Flash EPROM 64K 512 32/36 64K 40 3 6/8 ISP -In-system Programming-Extra I/O Port, / INT2, /INT3-WDT PDIP40/ PLCC44/ PQFP44 W78E365A Flash EPROM 64K 1280 32/36 64K 40 3 6/8 ISP -In-system Programming-Extra I/O Port, / INT2, /INT3-WDT-PWM PDIP40/ PLCC44/ PQFP44 W78ERD2A Flash EPROM 64K 1280 32/36 64K 40 3 7/9 ISP -In-system Programming-Extra I/O Port, / INT2, /INT3-WDT, PWM, PCA-High ESD, EMC immunity PDIP40/ PLCC44/ PQFP44 W78E858A Flash EPROM 32K 768 32/36 64K 40 3 14 ISP -In-system Programming-128 bytes EEPROM-Extra I/O Port, / INT2~INT9, 4 channels PWM PDIP40/ PLCC44/ PQFP44 W78C051D Mask 4K 128 32/36 64K 40 2 5/7 - -Extra I/O Port, / INT2, /INT3-WDT PDIP40/ PLCC44/ PQFP44 W78C052D Mask 8K 256 32/36 64K 40 3 6/8 - -Extra I/O Port, / INT2, /INT3-WDT PDIP40/ PLCC44/ PQFP44 W78C054A Mask 16K 256 32/36 64K 40 3 6/8 - -Extra I/O Port, / INT2, /INT3 PDIP40/ PLCC44/ PQFP44 W78C032C ROMless - 256 32 64K 40 3 6 - CMOS General purpose PDIP40/ PLCC44/ PQFP44 W78C438C ROMless - 256 40 1 M 40 3 8 - -5 pure ports I/O expanded-1 MB external memory space-Additional INT2, INT3 PLCC84/PQFP100
	Wide Supply Voltage Standard Parts Part No. ROM Type ROM (Byte) RAM (Byte) I/O Pins External Memory Space (Byte) Op. Volt Timer/ Counter Int ISP/ ICP Special Function PACKAGE W78L051A Flash EPROM 4K 128 32/36 64K 5.5V - 2.4V 2 5/7 - -Extra I/O Port,/INT2,/INT3 -WDT PDIP40/ PLCC44/ PQFP44 W78L052A Flash EPROM 8K 256 32/36 64K 5.5V - 2.4V 3 6/8 - -Extra I/O Port,/INT2,/INT3 -WDT PDIP40/ PLCC44/ PQFP44 78L054A Flash EPROM 16K 256 32/36 64K 5.5V - 2.4V 3 6/8 - -Extra I/O Port,/INT2,/INT3 -WDT PDIP40/ PLCC44/ PQFP44 W78L051C Flash EPROM 4K 128 32/36 64K 5.5V - 2.4V 2 5/7 - -Extra I/O Port,/INT2,/INT3 -WDT PDIP40/ PLCC44/ PQFP44 W78L052C Flash EPROM 8K 256 32/36 64K 5.5V - 2.4V 3 6/8 - -Extra I/O Port,/INT2,/INT3 -WDT PDIP40/ PLCC44/ PQFP44 W78L054C Flash EPROM 16K 256 32/36 64K 5.5V - 2.4V 3 6/8 - -Extra I/O Port,/INT2,/INT3 -WDT PDIP40/ PLCC44/ PQFP44 W78L058A Flash EPROM 32K 256 32/36 64K 5.5V - 2.4V 3 6/8 ISP -In-system Programming-Extra I/O Port, / INT2, /INT3 PDIP40/ PLCC44/ PQFP44 W78L516A Flash EPROM 64K 512 32/36 64K 5.5V - 2.4V 3 6/8 ISP -In-system Programming-Extra I/O Port, / INT2, /INT3 PDIP40/ PLCC44/ PQFP44 W78L365A Flash EPROM 64K 1280 32/36 64K 5.5V - 2.4V 3 6/8 ISP -In-system Programming-Extra I/O Port, / INT2, /INT3-WDT-PWM PDIP40/ PLCC44/ PQFP44 W78L812A Flash EPROM 8K 256 33/37 64K 5.5V - 2.4V 3 14 - -Extra I/O Port-Wake-up the Power-Down mode from Port1 interrupt-WDT-UART PDIP40/ PLCC44/ PQFP44
	Industrial Temperature Series Part No. ROM Type ROM (Byte) RAM (Byte) I/O Pins External Memory Space (Byte) Op. Volt Timer/ Counter Int ISP/ ICP Special Function PACKAGE W78IRD2A Flash EPROM 64K 1280 32/36 64K 5.5V - 2.4V 3 7/9 ISP -In-system Programming-Extra I/O Port, / INT2, /INT3, WDT-WDT, PWM, PCA-High ESD, EMC immunity PDIP40/ PLCC44 W78I051D Flash EPROM 4K 256 32/36 64K 40 3 6/8 ISP -Extra I/O Port,/INT2,/INT3 -WDT PDIP40/ PLCC44/ PQFP44 W78I052D Flash EPROM 8K 256 32/36 64K 40 3 6/8 ISP -Extra I/O Port,/INT2,/INT3 -WDT PDIP40/ PLCC44/ PQFP44 W78I054D Flash EPROM 16K 256 32/36 64K 40 3 6/8 ISP -Extra I/O Port,/INT2,/INT3 -WDT PDIP40/ PLCC44/ PQFP44 W78I058D Flash EPROM 32K 256 32/36 64K 5.5V - 2.4V 3 6/8 ISP -In-system Programming-Extra I/O Port, / INT2, /INT3 PDIP40/ PLCC44/ PQFP44 W78I516D Flash EPROM 64K 512 32/36 64K 5.5V - 2.4V 3 6/8 ISP -In-system Programming-Extra I/O Port, / INT2, /INT3 PDIP40/ PLCC44/ PQFP44