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| Part Number | C8051F121 | C8051F121R | C8051F221 | C8051F124 | C8051F125 | C8051F126 | C8051F127 | C8051F122 | C8051F123 | C8051F131 | C8051F021 | C8051F120 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Manufacturer | Silicon Labs | Silicon Labs | Silicon Labs | Silicon Labs | Silicon Labs | Silicon Labs | Silicon Labs | Silicon Labs | Silicon Labs | Silicon Labs | Silicon Labs | Silicon Labs |
| Product Status | Obsolete | Obsolete | Obsolete | Obsolete | Obsolete | Obsolete | Obsolete | Obsolete | Obsolete | Obsolete | Obsolete | Obsolete |
| Core Processor | 8051 | 8051 | 8051 | 8051 | 8051 | 8051 | 8051 | 8051 | 8051 | 8051 | 8051 | 8051 |
| Core Size | 8-Bit | 8-Bit | 8-Bit | 8-Bit | 8-Bit | 8-Bit | 8-Bit | 8-Bit | 8-Bit | 8-Bit | 8-Bit | 8-Bit |
| Speed | 100MHz | 100MHz | 25MHz | 50MHz | 50MHz | 50MHz | 50MHz | 100MHz | 100MHz | 100MHz | 25MHz | 100MHz |
| Connectivity | EBI/EMI, SMBus (2-Wire/I²C), SPI, UART/USART | EBI/EMI, SMBus (2-Wire/I²C), SPI, UART/USART | SPI, UART/USART | EBI/EMI, SMBus (2-Wire/I²C), SPI, UART/USART | EBI/EMI, SMBus (2-Wire/I²C), SPI, UART/USART | EBI/EMI, SMBus (2-Wire/I²C), SPI, UART/USART | EBI/EMI, SMBus (2-Wire/I²C), SPI, UART/USART | EBI/EMI, SMBus (2-Wire/I²C), SPI, UART/USART | EBI/EMI, SMBus (2-Wire/I²C), SPI, UART/USART | EBI/EMI, SMBus (2-Wire/I²C), SPI, UART/USART | EBI/EMI, SMBus (2-Wire/I²C), SPI, UART/USART | EBI/EMI, SMBus (2-Wire/I²C), SPI, UART/USART |
| Peripherals | Brown-out Detect/Reset, POR, PWM, Temp Sensor, WDT | Brown-out Detect/Reset, POR, PWM, Temp Sensor, WDT | Brown-out Detect/Reset, POR, WDT | Brown-out Detect/Reset, POR, PWM, Temp Sensor, WDT | Brown-out Detect/Reset, POR, PWM, Temp Sensor, WDT | Brown-out Detect/Reset, POR, PWM, Temp Sensor, WDT | Brown-out Detect/Reset, POR, PWM, Temp Sensor, WDT | Brown-out Detect/Reset, POR, PWM, Temp Sensor, WDT | Brown-out Detect/Reset, POR, PWM, Temp Sensor, WDT | Brown-out Detect/Reset, POR, PWM, Temp Sensor, WDT | Brown-out Detect/Reset, POR, PWM, Temp Sensor, WDT | Brown-out Detect/Reset, POR, PWM, Temp Sensor, WDT |
| Number of I/O | 32 | 32 | 22 | 64 | 32 | 64 | 32 | 64 | 32 | 32 | 32 | 64 |
| Program Memory Size | 128KB (128K x 8) | 128KB (128K x 8) | 8KB (8K x 8) | 128KB (128K x 8) | 128KB (128K x 8) | 128KB (128K x 8) | 128KB (128K x 8) | 128KB (128K x 8) | 128KB (128K x 8) | 128KB (128K x 8) | 64KB (64K x 8) | 128KB (128K x 8) |
| Program Memory Type | Flash | Flash | Flash | Flash | Flash | Flash | Flash | Flash | Flash | Flash | Flash | Flash |
| EEPROM Size | - | - | - | - | - | - | - | - | - | - | - | - |
| RAM Size | 8.25K x 8 | 8.25K x 8 | 256 x 8 | 8.25K x 8 | 8.25K x 8 | 8.25K x 8 | 8.25K x 8 | 8.25K x 8 | 8.25K x 8 | 8.25K x 8 | 4.25K x 8 | 8.25K x 8 |
| Voltage - Supply (Vcc/Vdd) | 3V ~ 3.6V | 3V ~ 3.6V | 2.7V ~ 3.6V | 2.7V ~ 3.6V | 2.7V ~ 3.6V | 2.7V ~ 3.6V | 2.7V ~ 3.6V | 3V ~ 3.6V | 3V ~ 3.6V | 3V ~ 3.6V | 2.7V ~ 3.6V | 3V ~ 3.6V |
| Data Converters | A/D 8x8b, 8x12b; D/A 2x12b | A/D 8x8b, 8x10b; D/A 2x12b | A/D 22x8b | A/D 8x8b, 8x12b; D/A 2x12b | A/D 8x8b, 8x12b; D/A 2x12b | A/D 8x8b, 8x10b; D/A 2x12b | A/D 8x8b, 8x10b; D/A 2x12b | A/D 8x8b, 8x10b; D/A 2x12b | A/D 8x8b, 8x10b; D/A 2x12b | A/D 8x10b | A/D 8x8b, 8x12b; D/A 2x12b | A/D 8x8b, 8x12b; D/A 2x12b |
| Oscillator Type | Internal | Internal | Internal | Internal | Internal | Internal | Internal | Internal | Internal | Internal | Internal | Internal |
| Operating Temperature | -40°C ~ 85°C (TA) | -40°C ~ 85°C (TA) | -40°C ~ 85°C (TA) | -40°C ~ 85°C (TA) | -40°C ~ 85°C (TA) | -40°C ~ 85°C (TA) | -40°C ~ 85°C (TA) | -40°C ~ 85°C (TA) | -40°C ~ 85°C (TA) | -40°C ~ 85°C (TA) | -40°C ~ 85°C (TA) | -40°C ~ 85°C (TA) |
| Mounting Type | Surface Mount | Surface Mount | Surface Mount | Surface Mount | Surface Mount | Surface Mount | Surface Mount | Surface Mount | Surface Mount | Surface Mount | Surface Mount | Surface Mount |
| Package / Case | 64-TQFP | 64-TQFP | 32-LQFP | 100-TQFP | 64-TQFP | 100-TQFP | 64-TQFP | 100-TQFP | 64-TQFP | 64-TQFP | 64-TQFP | 100-TQFP |
| Supplier Device Package | 64-TQFP (10x10) | 64-TQFP (10x10) | 32-LQFP (7x7) | 100-TQFP (14x14) | 64-TQFP (10x10) | 100-TQFP (14x14) | 64-TQFP (10x10) | 100-TQFP (14x14) | 64-TQFP (10x10) | 64-TQFP (10x10) | 64-TQFP (10x10) | 100-TQFP (14x14) |
