| Model Number |
| EFM8BB31F32A-D-4QFN24 |
EFM8BB51F8I-C-QFN20R |
| Model Name |
| SKYWORKS/SILICON LABS EFM8BB31F32A-D-4QFN24 |
SKYWORKS/SILICON LABS EFM8BB51F8I-C-QFN20R |
| Category |
| Microcontroller Units (MCUs/MPUs/SOCs) |
Microcontroller Units (MCUs/MPUs/SOCs) |
| Brand |
| SKYWORKS/SILICON LABS |
SKYWORKS/SILICON LABS |
| Description |
| 32KB 2.2V~3.6V 51Series 50MHz 20 QFN-24(4x4) Microcontroller Units (MCUs/MPUs/SOCs) ROHS |
8KB 1.8V~5.5V 51Series 50MHz 16 QFN-20(3x3) Microcontroller Units (MCUs/MPUs/SOCs) ROHS |
| RoHS |
| Lead free / RoHS Compliant |
Lead free / RoHS Compliant |
| Unit |
| Piece |
Piece |
| Weight: |
| 1.000 grams / 0.035274 oz |
1.000 grams / 0.035274 oz |
| Package / Case |
| QFN-24(4x4) |
QFN-20(3x3) |
| Package / Arrange |
| Tube-packed |
Tape & Reel (TR) |
| Battery |
| No |
No |
| ECCN |
| 3A991A2 |
3A991A2 |
| Low-Voltage Detect |
| Yes |
Yes |
| Program Storage Size |
| 32KB |
8KB |
| Operating Voltage Range |
| 2.2V~3.6V |
1.8V~5.5V |
| Operating Temperature Range |
| -40℃~+125℃ |
-40℃~+125℃ |
| CPU Core |
| 51Series |
51Series |
| Watchdog |
| Yes |
Yes |
| Internal Oscillator |
| Yes |
Yes |
| CPU Maximum Speed |
| 50MHz |
50MHz |
| DAC (Bit) |
| 12bit |
N/A |
| ADC (Bit) |
| 12bit |
12bit |
| GPIO Ports Number |
| 20 |
16 |
