| Part Number | C8051F301R | C8051F331R |
|---|---|---|
| Manufacturer | Silicon Labs | Silicon Labs |
| Category | Embedded - Microcontrollers | Embedded - Microcontrollers |
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| Product Status | Obsolete | Obsolete |
| Core Processor | 8051 | 8051 |
| Core Size | 8-Bit | 8-Bit |
| Speed | 25MHz | 25MHz |
| Connectivity | SMBus (2-Wire/I²C), UART/USART | SMBus (2-Wire/I²C), SPI, UART/USART |
| Peripherals | POR, PWM, WDT | POR, PWM, WDT |
| Number of I/O | 8 | 17 |
| Program Memory Size | 8KB (8K x 8) | 8KB (8K x 8) |
| Program Memory Type | Flash | Flash |
| EEPROM Size | - | - |
| RAM Size | 256 x 8 | 768 x 8 |
| Voltage - Supply (Vcc/Vdd) | 2.7V ~ 3.6V | 2.7V ~ 3.6V |
| Data Converters | - | - |
| Oscillator Type | Internal | Internal |
| Operating Temperature | -40°C ~ 85°C (TA) | -40°C ~ 85°C (TA) |
| Mounting Type | Surface Mount | Surface Mount |
| Package / Case | 10-VFDFN Exposed Pad | 20-VFQFN Exposed Pad |
| Supplier Device Package | 11-QFN (3x3) | 20-MLP (4x4) |