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| Core Processor | 8051 |
| Core Size | 8-Bit |
| Data Converters | A/D 8x10b |
| Eeprom Size | 128 x 8 |
| Mounting Type | Surface Mount |
| Number Of I/o | 18 |
| Operating Temperature | -40°C ~ 85°C (TA) |
| Oscillator Type | Internal |
| Package / Case | 20-SSOP |
| Peripherals | Brown-out Detect/Reset, LED, LVD, POR, PWM, WDT |
| Program Memory Size | 4KB (4K x 8) |
| Program Memory Type | FLASH |
| Ram Size | 128 x 8 |
| Series | W79 |
| Speed | 20MHz |
| Voltage - Supply (Vcc/vdd) | 2.4V ~ 5.5V |