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| PartNumber | C8051F921-G-GM | C8051F921-F-GM | C8051F921-F-GMR |
| Description | 8-bit Microcontrollers - MCU 32kB/4kB RAM, 10bADC, DC-DC, 0.9V, QFN24 | 8-bit Microcontrollers - MCU 32KB,10ADC,24Pin MCU | IC MCU 8BIT 32KB FLASH 24QFN |
| Manufacturer | Silicon Laboratories | Silicon Laboratories | - |
| Product Category | 8-bit Microcontrollers - MCU | 8-bit Microcontrollers - MCU | - |
| RoHS | Y | Y | - |
| Mounting Style | SMD/SMT | - | - |
| Package / Case | QFN-24 | - | - |
| Core | 8051 | - | - |
| Data Bus Width | 8 bit | - | - |
| Maximum Clock Frequency | 25 MHz | - | - |
| Program Memory Size | 32 kB | - | - |
| Data RAM Size | 4.25 kB | - | - |
| ADC Resolution | 10 bit | - | - |
| Number of I/Os | 16 I/O | - | - |
| Operating Supply Voltage | 1.8 V to 3.6 V | - | - |
| Minimum Operating Temperature | - 40 C | - | - |
| Maximum Operating Temperature | + 85 C | - | - |
| Packaging | Tube | Tube | - |
| Program Memory Type | Flash | - | - |
| Brand | Silicon Labs | Silicon Labs | - |
| Data RAM Type | RAM | - | - |
| Interface Type | I2C, SMBus, SPI, UART | - | - |
| Number of Timers/Counters | 4 Timer | - | - |
| Processor Series | C8051F9xx | - | - |
| Product Type | 8-bit Microcontrollers - MCU | 8-bit Microcontrollers - MCU | - |
| Factory Pack Quantity | 91 | 91 | - |
| Subcategory | Microcontrollers - MCU | Microcontrollers - MCU | - |
| Supply Voltage Max | 3.6 V | - | - |
| Supply Voltage Min | 0.9 V | - | - |
| Unit Weight | 0.001764 oz | - | - |
| Series | - | C8051F921 | - |