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| PartNumber | W79E4051RARG | W79E4051RASG | W79E4051RAKG |
| Description | IC MCU 8BIT 4KB FLASH 20SSOP | IC MCU 8BIT 4KB FLASH 20SOIC | IC MCU 8BIT 4KB FLASH 20DIP |
| Manufacturer | Nuvoton Technology Corporation of America | Nuvoton Technology Corporation of America | Nuvoton Technology Corporation of America |
| Product Category | Embedded - Microcontrollers | Embedded - Microcontrollers | Embedded - Microcontrollers |
| Series | W79 | W79 | W79 |
| Packaging | Tray | Tube | Tube |
| Package Case | 20-SSOP (0.209", 5.30mm Width) | 20-SOIC (0.295", 7.50mm Width) | 20-DIP Module |
| Operating Temperature | -40°C ~ 85°C (TA) | -40°C ~ 85°C (TA) | -40°C ~ 85°C (TA) |
| Supplier Device Package | * | * | * |
| Number of I O | 17 | 17 | 17 |
| Speed | 24MHz | 24MHz | 24MHz |
| EEPROM Size | 128 x 8 | 128 x 8 | 128 x 8 |
| Core Processor | 8051 | 8051 | 8051 |
| RAM Size | 256 x 8 | 256 x 8 | 256 x 8 |
| Program Memory Type | FLASH | FLASH | FLASH |
| Peripherals | Brown-out Detect/Reset, LED, LVD, POR, PWM, WDT | Brown-out Detect/Reset, LED, LVD, POR, PWM, WDT | Brown-out Detect/Reset, LED, LVD, POR, PWM, WDT |
| Connectivity | UART/USART | UART/USART | UART/USART |
| Voltage Supply Vcc Vdd | 2.4 V ~ 5.5 V | 2.4 V ~ 5.5 V | 2.4 V ~ 5.5 V |
| Core Size | 8-Bit | 8-Bit | 8-Bit |
| Program Memory Size | 4KB (4K x 8) | 4KB (4K x 8) | 4KB (4K x 8) |
| Data Converters | - | - | - |
| Oscillator Type | Internal | Internal | Internal |