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| PartNumber | C8051F121-GQ | C8051F121-GQR | C8051F121 |
| Description | 8-bit Microcontrollers - MCU 8051 100 MHz 128 kB MAC 8-bit MCU | 8-bit Microcontrollers - MCU 8051 100 MHz 128 kB MAC 8-bit MCU | 8-bit Microcontrollers - MCU |
| Manufacturer | Silicon Laboratories | Silicon Laboratories | Silicon Laboratories |
| Product Category | 8-bit Microcontrollers - MCU | 8-bit Microcontrollers - MCU | 8-bit Microcontrollers - MCU |
| RoHS | Y | Y | N |
| Mounting Style | SMD/SMT | SMD/SMT | SMD/SMT |
| Package / Case | TQFP-64 | TQFP-64 | TQFP-64 |
| Series | C8051F121 | C8051F121 | C8051 |
| Core | 8051 | 8051 | 8051 |
| Data Bus Width | 8 bit | 8 bit | 8 bit |
| Maximum Clock Frequency | 100 MHz | 100 MHz | 100 MHz |
| Program Memory Size | 128 kB | 128 kB | 128 kB |
| Data RAM Size | 8.25 kB | 8.25 kB | 8.25 kB |
| ADC Resolution | 12 bit | 12 bit | 12 bit |
| Number of I/Os | 32 I/O | 32 I/O | 32 I/O |
| Operating Supply Voltage | 3 V to 3.6 V | 3 V to 3.6 V | 3 V to 3.6 V |
| Minimum Operating Temperature | - 40 C | - 40 C | - 40 C |
| Maximum Operating Temperature | + 85 C | + 85 C | + 85 C |
| Packaging | Tray | Reel | Tray |
| Height | 1 mm | 1 mm | 1 mm |
| Length | 10 mm | 10 mm | 10 mm |
| Product | MCU | MCU | MCU |
| Program Memory Type | Flash | Flash | Flash |
| Width | 10 mm | 10 mm | 10 mm |
| Brand | Silicon Labs | Silicon Labs | Silicon Labs |
| Data ROM Size | 64 kB | 64 kB | 64 kB |
| Data ROM Type | Flash | Flash | Flash |
| Interface Type | I2C, SMBus, SPI, UART | I2C, SMBus, SPI, UART | I2C, SMBus, SPI, UART |
| Moisture Sensitive | Yes | Yes | Yes |
| Number of ADC Channels | 8 | 8 | 9 |
| Number of Timers/Counters | 5 Timer | 5 Timer | 16 Timer |
| Processor Series | C8051 | C8051 | C8051 |
| Product Type | 8-bit Microcontrollers - MCU | 8-bit Microcontrollers - MCU | 8-bit Microcontrollers - MCU |
| Factory Pack Quantity | 160 | 500 | 160 |
| Subcategory | Microcontrollers - MCU | Microcontrollers - MCU | Microcontrollers - MCU |
| Supply Voltage Max | 3.6 V | 3.6 V | 3.6 V |
| Supply Voltage Min | 3 V | 3 V | 3 V |
| Unit Weight | 0.012718 oz | 0.012718 oz | 0.012718 oz |