EFM8BB31F64I-B-QFP32 microcontroller by Silicon-Labs. Family: Busy bee family 3 Features: 8-Bit MCU, 64KB Flash memory 12-Bit Analog-to-digital converter, two comparators, 2 UARTs ,Up to 4 x Voltage DAC, SPI, I2C / SMBus Revision: B Temperature range: "I" = -40 to +125°C Package: Surface Mount QFP32 Download Silicon-Labs EFM8BB31F64I-B-QFP32 .pdf datasheet: Package: Surface Mount QFP32 Status: New RoHS compliant: YES