| Series | W78 |
| Package | Tube |
| Part Status | Active |
| Core Processor | 8051 |
| Core Size | 8-Bit |
| Speed | 24MHz |
| Connectivity | EBI/EMI |
| Peripherals | LED, WDT |
| Number of I/O | 32 |
| Program Memory Size | 4KB (4K x 8) |
| Program Memory Type | Mask ROM |
| EEPROM Size | - |
| RAM Size | 256 x 8 |
| Voltage - Supply (Vcc/Vdd) | 1.8V ~ 5.5V |
| Data Converters | - |
| Oscillator Type | Internal |
| Operating Temperature | 0°C ~ 70°C (TA) |
| Mounting Type | Through Hole |
| Package / Case | 40-DIP |
| Supplier Device Package | - |
