| Series | W77 |
| Package | Tray |
| Part Status | Obsolete |
| Core Processor | 8051 |
| Core Size | 8-Bit |
| Speed | 25MHz |
| Connectivity | EBI/EMI, Serial Port |
| Peripherals | POR, WDT |
| Number of I/O | 36 |
| Program Memory Size | - |
| Program Memory Type | ROMless |
| EEPROM Size | - |
| RAM Size | 1K x 8 |
| Voltage - Supply (Vcc/Vdd) | 2.7V ~ 5.5V |
| Data Converters | - |
| Oscillator Type | Internal |
| Operating Temperature | 0°C ~ 70°C (TA) |
| Mounting Type | Surface Mount |
| Package / Case | 44-BQFP |
| Supplier Device Package | - |
