| PartNumber | EFM8SB20F64G-A-QFN24 | EFM8SB20F64G-A-QFN32 | EFM8SB20F64G-A-QFN24R |
| Description | 8-bit Microcontrollers - MCU Low Power, 64kB/4352B RAM, 10b ADC | 8-bit Microcontrollers - MCU Low Power, 64kB/4352B RAM, 10b ADC | 8-bit Microcontrollers - MCU Low Power, 64kB/4352B RAM, 10b ADC |
| 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 | QFN-24 | QFN-32 | QFN-24 |
| Series | EFM8SB | EFM8SB | EFM8SB |
| 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 | 64 kB | 64 kB | 64 kB |
| Data RAM Size | 4 kB | 4 kB | 4.25 kB |
| ADC Resolution | 10 bit | 10 bit | 10 bit |
| Number of I/Os | 16 I/O | 24 I/O | 16 I/O |
| Operating Supply Voltage | 2.4 V | 2.4 V | 2.4 V |
| Minimum Operating Temperature | - 40 C | - 40 C | - 40 C |
| Maximum Operating Temperature | + 85 C | + 85 C | + 85 C |
| Packaging | Tube | Tube | Reel |
| Product | MCU | MCU | MCU |
| Program Memory Type | Flash | Flash | Flash |
| Brand | Silicon Labs | Silicon Labs | Silicon Labs |
| Data RAM Type | RAM | RAM | RAM |
| Interface Type | I2C, SMBus, SPI, UART | I2C, SMBus, SPI, UART | I2C/SMBus, SPI, UART |
| Number of ADC Channels | 15 Channel | 23 Channel | 15 Channel |
| Number of Timers/Counters | 4 Timer | 4 Timer | 4 x 16 bit |
| Processor Series | EFM8SB2 | EFM8SB2 | EFM8SB2 |
| Product Type | 8-bit Microcontrollers - MCU | 8-bit Microcontrollers - MCU | 8-bit Microcontrollers - MCU |
| Factory Pack Quantity | 91 | 73 | 1500 |
| Subcategory | Microcontrollers - MCU | Microcontrollers - MCU | Microcontrollers - MCU |
| Supply Voltage Max | 3.6 V | 3.6 V | 3.6 V |
| Supply Voltage Min | 1.8 V | 1.8 V | 1.8 V |
| Tradename | EFM8 | EFM8 | EFM8 |
| Unit Weight | 0.001764 oz | 0.002449 oz | 0.001764 oz |
| Watchdog Timers | - | - | Watchdog Timer |