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| PartNumber | EFM8UB20F32G-A-QFP48 | EFM8UB20F32G-A-QFP32R | EFM8UB20F32G-A-QFP32 |
| Description | 8-bit Microcontrollers - MCU USB, 32kB/2304B RAM, 10b Diff-ADC, EMIF | 8-bit Microcontrollers - MCU USB, 32kB/2304B RAM, 10b Diff-ADC | 8-bit Microcontrollers - MCU USB, 32kB/2304B RAM, 10b Diff-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 | QFP-48 | QFP-32 | QFP-32 |
| Series | EFM8UB2 | EFM8UB2 | EFM8UB2 |
| Core | 8051 | - | 8051 |
| Data Bus Width | 8 bit | - | 8 bit |
| Maximum Clock Frequency | 48 MHz | - | 48 MHz |
| Program Memory Size | 32 kB | - | 32 kB |
| Data RAM Size | 2 kB | - | 2 kB |
| ADC Resolution | 10 bit | - | 10 bit |
| Number of I/Os | 40 I/O | - | 25 I/O |
| Operating Supply Voltage | 3.3 V | - | 3.3 V |
| Minimum Operating Temperature | - 40 C | - | - 40 C |
| Maximum Operating Temperature | + 85 C | - | + 85 C |
| Packaging | Tray | Reel | Tray |
| Product | MCU | - | MCU |
| Program Memory Type | Flash | - | Flash |
| Brand | Silicon Labs | Silicon Labs | Silicon Labs |
| Data RAM Type | RAM | - | RAM |
| Interface Type | I2C, SMBus, SPI, UART | - | I2C, SMBus, SPI, UART |
| Moisture Sensitive | Yes | - | Yes |
| Number of ADC Channels | 32 Channel | - | 20 Channel |
| Number of Timers/Counters | 6 Timer | - | 6 Timer |
| Processor Series | EFM8UB2 | - | EFM8UB2 |
| Product Type | 8-bit Microcontrollers - MCU | 8-bit Microcontrollers - MCU | 8-bit Microcontrollers - MCU |
| Factory Pack Quantity | 250 | 500 | 250 |
| Subcategory | Microcontrollers - MCU | Microcontrollers - MCU | Microcontrollers - MCU |
| Supply Voltage Max | 3.6 V | - | 3.6 V |
| Supply Voltage Min | 2.7 V | - | 2.7 V |
| Tradename | EFM8 | EFM8 | EFM8 |
| Unit Weight | 0.105822 oz | 0.005742 oz | 0.005742 oz |