PART NO.	PRICE		STOCK	MANUFACTURE	DESCRIPTION	Mounting Style	Package / Case	Maximum Operating Temperature	Packaging	Operating Supply Voltage	Core	Data Bus Width	Maximum Clock Frequency	Program Memory Size	Data RAM Size	ADC Resolution
EFM8BB31F64I-B-QFN32	1+ $1.670 10+ $1.580 25+ $1.530 50+ $1.480	PDF RFQ	119 In-stock	Silicon Labs	8-bit Microcontrollers - MCU 64kB flash, 4.25kB 12b ADC, 4x DACs	SMD/SMT	QFN-32	+ 125 C	Tube	2.2 V to 3.6 V	8051	8 bit	50 MHz	64 kB	4.25 kB	10 bit/12 bit
EFM8BB31F64I-B-QFN24	1+ $1.580 10+ $1.490 25+ $1.450 50+ $1.400	PDF RFQ	215 In-stock	Silicon Labs	8-bit Microcontrollers - MCU 64kB flash, 4.25kB 12b ADC, 4x DACs	SMD/SMT	QFN-24	+ 125 C	Tube	2.2 V to 3.6 V	8051	8 bit	50 MHz	64 kB	4.25 kB	10 bit/12 bit
EFM8BB31F64I-B-QFP32	1+ $1.890 10+ $1.780 25+ $1.730 50+ $1.680	PDF RFQ	43 In-stock	Silicon Labs	8-bit Microcontrollers - MCU 64kB flash, 4.25kB 12b ADC, 4x DACs	SMD/SMT	QFP-32	+ 125 C	Tube	2.2 V to 3.6 V	8051	8 bit	50 MHz	64 kB	4.25 kB	10 bit/12 bit
EFM8BB31F64I-B-QSOP24	1+ $1.690 10+ $1.590 25+ $1.550 50+ $1.500	PDF RFQ	151 In-stock	Silicon Labs	8-bit Microcontrollers - MCU 64kB flash, 4.25kB 12b ADC, 4x DACs	SMD/SMT	QSOP-24	+ 125 C	Tube	2.2 V to 3.6 V	8051	8 bit	50 MHz	64 kB	4.25 kB	10 bit/12 bit