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| PartNumber | W79E823ADG | W79E823ASG | W79E823BDG |
| Description | IC MCU 8BIT 4KB FLASH 20DIP | IC MCU 8BIT 4KB FLASH 20SOIC | |
| Manufacturer | Nuvoton Technology Corporation of America | Nuvoton Technology Corporation of America | - |
| Product Category | Embedded - Microcontrollers | Embedded - Microcontrollers | - |
| Series | W79 | W79 | - |
| Packaging | Tube | Tube | - |
| Package Case | 20-DIP (0.300", 7.62mm) | 20-SOIC (0.295", 7.50mm Width) | - |
| Operating Temperature | -40°C ~ 85°C (TA) | -40°C ~ 85°C (TA) | - |
| Supplier Device Package | * | * | - |
| Number of I O | 18 | 18 | - |
| Speed | 20MHz | 20MHz | - |
| EEPROM Size | - | - | - |
| Core Processor | 8051 | 8051 | - |
| RAM Size | 128 x 8 | 128 x 8 | - |
| Program Memory Type | FLASH | FLASH | - |
| Peripherals | Brown-out Detect/Reset, LED, LVD, POR, PWM, WDT | Brown-out Detect/Reset, LED, LVD, POR, PWM, WDT | - |
| Connectivity | I2C, UART/USART | I2C, UART/USART | - |
| Voltage Supply Vcc Vdd | 2.7 V ~ 5.5 V | 2.7 V ~ 5.5 V | - |
| Core Size | 8-Bit | 8-Bit | - |
| Program Memory Size | 4KB (4K x 8) | 4KB (4K x 8) | - |
| Data Converters | A/D 4x10b | A/D 4x10b | - |
| Oscillator Type | Internal | Internal | - |