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| TYPE | DESCRIPTION |
| Mfr | Silicon Labs |
| Series | Universal Bee |
| Package | Tray |
| Product Status | Active |
| DigiKey Programmable | Not Verified |
| Core Processor | CIP-51 8051 |
| Core Size | 8-Bit |
| Speed | 48MHz |
| Connectivity | I²C, SMBus, SPI, UART/USART, USB |
| Peripherals | Brown-out Detect/Reset, POR, PWM, WDT |
| Number of I/O | 25 |
| Program Memory Size | 32KB (32K x 8) |
| Program Memory Type | FLASH |
| EEPROM Size | - |
| RAM Size | 2.25K x 8 |
| Voltage - Supply (Vcc/Vdd) | 2.65V ~ 3.6V |
| Data Converters | A/D 20x10b |
| Oscillator Type | Internal |
| Operating Temperature | -40°C ~ 85°C (TA) |
| Mounting Type | Surface Mount |
| Package / Case | 32-LQFP |
| Supplier Device Package | 32-QFP (7x7) |
| Base Product Number | EFM8UB20 |
1
3.72
3.72
10
3.341
33.41
25
3.1588
78.97
80
2.73763
219.0104
250
2.5972
649.3
500
2.33048
1165.24
1000
1.96546
1965.46
2500
1.86719
4667.975
5000
1.79699
8984.95
