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| Part Number | EFM8UB31F40G-A-QSOP24R | 
| Datasheet | EFM8UB31F40G-A-QSOP24R datasheet | 
| Description | IC MCU 8BIT 40KB FLASH 24QSOP | 
| Manufacturer | Silicon Labs | 
| Series | Universal Bee | 
| Part Status | Active | 
| 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 | 17 | 
| Program Memory Size | 40KB (40K x 8) | 
| Program Memory Type | FLASH | 
| EEPROM Size | - | 
| RAM Size | 3.25K x 8 | 
| Voltage - Supply (Vcc/Vdd) | 1.71V ~ 5.5V | 
| Data Converters | A/D 16x12b | 
| Oscillator Type | Internal | 
| Operating Temperature | -40°C ~ 85°C (TA) | 
| Package / Case | Surface Mount | 
| Supplier Device Package | 24-SSOP (0.154", 3.90mm Width) | 
| Base Part Number | 24-QSOP |