| Model Number |
| EFM8BB21F16G-C-QFN20R |
EFM8UB20F64G-B-QFN32 |
| Model Name |
| SKYWORKS/SILICON LABS EFM8BB21F16G-C-QFN20R |
SKYWORKS/SILICON LABS EFM8UB20F64G-B-QFN32 |
| Category |
| Microcontroller Units (MCUs/MPUs/SOCs) |
Microcontroller Units (MCUs/MPUs/SOCs) |
| Brand |
| SKYWORKS/SILICON LABS |
SKYWORKS/SILICON LABS |
| Description |
| 16KB 2.2V~3.6V 51Series 2.25KB 50MHz FLASH 16 QFN-20-EP(3x3) Microcontroller Units (MCUs/MPUs/SOCs) ROHS |
64KB 2.65V~3.6V 51Series 48MHz 25 QFN-32-EP(5x5) Microcontroller Units (MCUs/MPUs/SOCs) ROHS |
| RoHS |
| Lead free / RoHS Compliant |
Lead free / RoHS Compliant |
| Unit |
| Piece |
Piece |
| Weight: |
| 4.700 grams / 0.165788 oz |
0.130 grams / 0.004586 oz |
| Package / Case |
| QFN-20-EP(3x3) |
QFN-32-EP(5x5) |
| Package / Arrange |
| Tape & Reel (TR) |
Tube-packed |
| Battery |
| No |
No |
| ECCN |
| 3A991A2 |
3A991A2 |
| Infrared Data Association |
| - |
N/A |
| Low-Voltage Detect |
| - |
Yes |
| CCP Capture/Compare |
| - |
N/A |
| Program Storage Size |
| 16KB |
64KB |
| Internal Comparator |
| - |
N/A |
| communication protocol |
| - |
N/A |
| Operating Voltage Range |
| 2.2V~3.6V |
2.65V~3.6V |
| Operating Temperature Range |
| -40℃~+85℃ |
-40℃~+85℃ |
| Watchdog |
| - |
Yes |
| CPU Core |
| 51Series |
51Series |
| Peripheral/Function |
| PWM;WDT |
N/A |
| Real-Time Clock |
| - |
N/A |
| Secure Digital Input and Output |
| - |
N/A |
| Universal Serial Bus |
| - |
Yes |
| Direct Memory Access |
| - |
N/A |
| RAM Size |
| 2.25KB |
N/A |
| PWM (Bit) |
| - |
N/A |
| Internal Oscillator |
| Yes |
Yes |
| CPU Maximum Speed |
| 50MHz |
48MHz |
| DAC (Bit) |
| - |
N/A |
| Program Memory Type |
| FLASH |
N/A |
| ADC (Bit) |
| 12bit |
10bit |
| GPIO Ports Number |
| 16 |
25 |
