8-bit CISC microcontroller featuring a 50 MHz 8051 core with 16KB Flash program memory and 2.25KB RAM. This surface-mount device offers 18 programmable I/Os, four timers, and I2C, SPI, and UART interfaces. Housed in a 24-pin QFN EP package (4x4x0.73mm) with a 0.5mm pin pitch, it operates from 2.5V to 5V and supports 32 ADC channels. Automotive-grade temperature range (-40°C to 125°C) is supported.
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Silicon Labs C8051F557-IMR technical specifications.
| Basic Package Type | Non-Lead-Frame SMT |
| Package Family Name | QFN |
| Package/Case | QFN EP |
| Package Description | Quad Flat No Lead Package, Exposed Pad |
| Lead Shape | No Lead |
| Pin Count | 24 |
| PCB | 24 |
| Package Length (mm) | 4 |
| Package Width (mm) | 4 |
| Package Height (mm) | 0.73 |
| Seated Plane Height (mm) | 0.75 |
| Pin Pitch (mm) | 0.5 |
| Package Material | Plastic |
| Mounting | Surface Mount |
| Family Name | C8051F55x |
| Data Bus Width | 8bit |
| Instruction Set Architecture | CISC |
| Maximum Clock Rate | 50MHz |
| Maximum CPU Frequency | 50MHz |
| Device Core | 8051 |
| Program Memory Type | Flash |
| Program Memory Size | 16KB |
| RAM Size | 2.25KB |
| Number of Programmable I/Os | 18 |
| Core Architecture | 8051 |
| Programmability | Yes |
| Number of Timers | 4 |
| Interface Type | I2C/SMBus/SPI/UART |
| CAN | 0 |
| I2C | 1 |
| SPI | 1 |
| Ethernet | 0 |
| UART | 1 |
| USART | 0 |
| USB | 0 |
| I2S | 0 |
| Max Operating Supply Voltage | 5.25V |
| Min Operating Temperature | -40°C |
| Max Operating Temperature | 125°C |
| ADC Channels | 32 |
| Number of ADCs | Single |
| Cage Code | 6SQ24 |
| EU RoHS | Yes |
| HTS Code | 8542390001 |
| Schedule B | 8542390000 |
| ECCN | 3A991.a.2 |
| Automotive | Yes |
| AEC Qualified | Yes |
| PPAP | No |
| RoHS Versions | 2011/65/EU, 2015/863 |
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