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| PartNumber | W78E052D | W78E052DDG | W78E052DFG |
| Description | IC MCU 8BIT 8KB FLASH 40DIP | IC MCU 8BIT 8KB FLASH 44QFP | |
| 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 | W78 | W78 | W78 |
| Packaging | Tube | Tube | Tray |
| Package Case | 40-DIP | 40-DIP | 44-BQFP |
| Operating Temperature | -40°C ~ 85°C (TA) | -40°C ~ 85°C (TA) | -40°C ~ 85°C (TA) |
| Supplier Device Package | * | * | * |
| Number of I O | 32 | 32 | 36 |
| Speed | 40MHz | 40MHz | 40MHz |
| EEPROM Size | - | - | - |
| Core Processor | 8052 | 8052 | 8052 |
| RAM Size | 256 x 8 | 256 x 8 | 256 x 8 |
| Program Memory Type | FLASH | FLASH | FLASH |
| Peripherals | POR, WDT | POR, WDT | POR, WDT |
| Connectivity | EBI/EMI, UART/USART | EBI/EMI, UART/USART | EBI/EMI, 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 | 8KB (8K x 8) | 8KB (8K x 8) | 8KB (8K x 8) |
| Data Converters | - | - | - |
| Oscillator Type | External | External | External |