| PartNumber | C8051F855-C-GU | C8051F855-C-GMR | C8051F855-C-GUR |
| Description | 8-bit Microcontrollers - MCU 8051 25 MHz 4 kB 8-bit MCU | 8-bit Microcontrollers - MCU 2kB/256B RAM, QFN20 | 8-bit Microcontrollers - MCU 2kB/256B RAM, QSOP24 |
| Manufacturer | Silicon Laboratories | Silicon Laboratories | Silicon Laboratories |
| Product Category | 8-bit Microcontrollers - MCU | 8-bit Microcontrollers - MCU | 8-bit Microcontrollers - MCU |
| RoHS | Y | Y | Y |
| Mounting Style | SMD/SMT | SMD/SMT | SMD/SMT |
| Package / Case | QSOP-24 | QFN-20 | QSOP-24 |
| Series | C8051F855 | C8051F855 | C8051F855 |
| Core | 8051 | 8051 | 8051 |
| Data Bus Width | 8 bit | 8 bit | 8 bit |
| Maximum Clock Frequency | 25 MHz | 25 MHz | 25 MHz |
| Program Memory Size | 2 kB | 2 kB | 2 kB |
| Data RAM Size | 256 B | 256 B | 256 B |
| ADC Resolution | No ADC | No ADC | No ADC |
| Number of I/Os | 18 I/O | 16 I/O | 18 I/O |
| Operating Supply Voltage | 3.6 V | 3.6 V | 3.6 V |
| Minimum Operating Temperature | - 40 C | - 40 C | - 40 C |
| Maximum Operating Temperature | + 85 C | + 85 C | + 85 C |
| Qualification | AEC-Q100 | - | - |
| Packaging | Tube | Reel | Reel |
| Program Memory Type | Flash | Flash | Flash |
| Brand | Silicon Labs | Silicon Labs | Silicon Labs |
| Data RAM Type | RAM | RAM | RAM |
| Interface Type | I2C, SPI, UART | I2C, SPI, UART | I2C, SPI, UART |
| Moisture Sensitive | Yes | - | - |
| Number of Timers/Counters | 4 Timer | 4 Timer | 4 Timer |
| Processor Series | C8051F85x | C8051F85x | C8051F85x |
| Product Type | 8-bit Microcontrollers - MCU | 8-bit Microcontrollers - MCU | 8-bit Microcontrollers - MCU |
| Factory Pack Quantity | 56 | 1500 | 2500 |
| Subcategory | Microcontrollers - MCU | Microcontrollers - MCU | Microcontrollers - MCU |
| Supply Voltage Max | 3.6 V | 3.6 V | 3.6 V |
| Supply Voltage Min | 2.2 V | 2.2 V | 2.2 V |
| Unit Weight | 0.005052 oz | 0.001764 oz | 0.005052 oz |