| Series | W78 |
| Package | Tube |
| Part Status | Not For New Designs |
| Core Processor | 8052 |
| Core Size | 8-Bit |
| Speed | 40MHz |
| Connectivity | EBI/EMI, UART/USART |
| Peripherals | POR, WDT |
| Number of I/O | 36 |
| Program Memory Size | 4KB (4K x 8) |
| Program Memory Type | FLASH |
| EEPROM Size | - |
| RAM Size | 256 x 8 |
| Voltage - Supply (Vcc/Vdd) | 2.4V ~ 5.5V |
| Data Converters | - |
| Oscillator Type | External |
| Operating Temperature | -40°C ~ 85°C (TA) |
| Mounting Type | Surface Mount |
| Package / Case | 44-LCC (J-Lead) |
| Supplier Device Package | - |
