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| Part Number | EFM8BB31F16I-B-5QFN32R | 
| Datasheet | EFM8BB31F16I-B-5QFN32R datasheet | 
| Description | IC MCU 8BIT 16KB FLASH 32QFN | 
| Manufacturer | Silicon Labs | 
| Series | Busy Bee | 
| Part Status | Active | 
| Core Processor | CIP-51 8051 | 
| Core Size | 8-Bit | 
| Speed | 50MHz | 
| Connectivity | I²C, SMBus, SPI, UART/USART | 
| Peripherals | Brown-out Detect/Reset, POR, PWM, WDT | 
| Number of I/O | 29 | 
| Program Memory Size | 16KB (16K x 8) | 
| Program Memory Type | FLASH | 
| EEPROM Size | - | 
| RAM Size | 2.25K x 8 | 
| Voltage - Supply (Vcc/Vdd) | 2.2V ~ 3.6V | 
| Data Converters | A/D 20x10/12b SAR; D/A 2x12b | 
| Oscillator Type | Internal | 
| Operating Temperature | -40°C ~ 125°C (TA) | 
| Package / Case | Surface Mount | 
| Supplier Device Package | 32-WFQFN Exposed Pad | 
| Base Part Number | 32-QFN (5x5) |