| Series | W78 |
| Package | Tube |
| Part Status | Obsolete |
| Core Processor | 80C52 |
| Core Size | 8-Bit |
| Speed | 25MHz |
| Connectivity | EBI/EMI, UART/USART |
| Peripherals | POR, PWM, WDT |
| Number of I/O | 32 |
| Program Memory Size | 64KB (64K x 8) |
| Program Memory Type | FLASH |
| EEPROM Size | - |
| RAM Size | 1.25K x 8 |
| Voltage - Supply (Vcc/Vdd) | 4.5V ~ 5.5V |
| Data Converters | - |
| Oscillator Type | Internal |
| Operating Temperature | -40°C ~ 85°C (TA) |
| Mounting Type | Through Hole |
| Package / Case | 40-DIP |
| Supplier Device Package | - |
