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Image	Part #	Mfr.	Description	Datasheet	Availability	Pricing (CLP) Filter the results in the table by unit price based on your quantity.	Qty.	Core	Program Memory Size	Data RAM Size	Package / Case	Maximum Clock Frequency	ADC Resolution	Number of I/Os	Supply Voltage - Min	Supply Voltage - Max	Mounting Style	Data Bus Width	Minimum Operating Temperature	Maximum Operating Temperature	Series	Packaging
8-bit Microcontrollers - MCU 5 Volt 8051 50 Mhz 4 kB flash 0.5 kB RAM 9 GPIO BB5 8-bit MCU EFM8BB50F4G-A-QFN12 Silicon Labs 1: $854 706In Stock	Mfr. Part # EFM8BB50F4G-A-QFN12 Mouser Part # 634-M8BB50F4GAQFN12	Silicon Labs	8-bit Microcontrollers - MCU 5 Volt 8051 50 Mhz 4 kB flash 0.5 kB RAM 9 GPIO BB5 8-bit MCU Learn More about Silicon Labs efm8bb50 mcus	Datasheet	706In Stock	$854 $661 $612 $563 View $445 $426 $415	Min.: 1 Mult.: 1		4 kB	512 B	QFN-12	50 MHz	12 bit	9 I/O	1.8 V	5.5 V	SMD/SMT	8 bit	- 40 C	+ 85 C	BB50	Cut Tape
8-bit Microcontrollers - MCU 8051 75 MHz 16 kB flash 1.25 kB RAM 8-bit Laser Bee MCU EFM8LB10F16E-C-QFP32 Silicon Labs 1: $3.042 1.249In Stock NRND	Mfr. Part # EFM8LB10F16E-C-QFP32 Mouser Part # 634-LB10F16ECQFP32 NRND	Silicon Labs	8-bit Microcontrollers - MCU 8051 75 MHz 16 kB flash 1.25 kB RAM 8-bit Laser Bee MCU Learn More about Silicon Labs silabs efm8 laser bee	Datasheet	1.249In Stock	$3.042 $2.256 $2.062 $1.846 $1.800	Min.: 1 Mult.: 1	CIP-51 8051	16 kB	1.25 kB	QFP-32	72 MHz	10 bit/12 bit/14 bit	28 I/O	2.2 V	3.6 V	SMD/SMT	8 bit	- 40 C	+ 105 C	EFM8LB1	Tray
8-bit Microcontrollers - MCU 32K Flash 50MHz 8051 1.71V to 5.5V CY8C3245LTI-163 Infineon Technologies 1: $11.108 533In Stock	Mfr. Part # CY8C3245LTI-163 Mouser Part # 727-CY8C3245LTI-163	Infineon Technologies	8-bit Microcontrollers - MCU 32K Flash 50MHz 8051 1.71V to 5.5V Learn More about Infineon Technologies cypresspsoc3	Datasheet	533In Stock	$11.108 $8.647 $7.656 $7.348 View $7.007 $6.551 Quote	Min.: 1 Mult.: 1	8051	32 kB	4 kB	QFN-68	50 MHz	12 bit	46 I/O	1.71 V	5.5 V	SMD/SMT	8 bit	- 40 C	+ 85 C	CY8C3245	Tray
8-bit Microcontrollers - MCU 8051 25 MHz 2 kB flash 0.25 kB RAM 8-bit Busy Bee MCU EFM8BB10F2G-A-QFN20R Silicon Labs 1: $980 15.521In Stock	Mfr. Part # EFM8BB10F2G-A-QFN20R Mouser Part # 634-8BB10F2GAQF20R	Silicon Labs	8-bit Microcontrollers - MCU 8051 25 MHz 2 kB flash 0.25 kB RAM 8-bit Busy Bee MCU Learn More about Silicon Labs siliconlabs efm8 busy bee	Datasheet	15.521In Stock	Cut Tape $980 $754 $673 $614 Reel $507 View $594 $547 $518 $500 MouseReel Available	Min.: 1 Mult.: 1 : 2.500	CIP-51 8051	2 kB	256 B	QFN-20	25 MHz	12 bit	16 I/O	2.2 V	3.6 V	SMD/SMT	8 bit	- 40 C	+ 85 C	EFM8BB1	Reel, Cut Tape, MouseReel
8-bit Microcontrollers - MCU 8051 75 MHz 32 kB flash 2.25 kB RAM 8-bit Laser Bee MCU EFM8LB12F32E-C-QFN24R Silicon Labs 1: $3.452 980In Stock	Mfr. Part # EFM8LB12F32E-C-QFN24R Mouser Part # 634-LB12F32ECQFN24R	Silicon Labs	8-bit Microcontrollers - MCU 8051 75 MHz 32 kB flash 2.25 kB RAM 8-bit Laser Bee MCU Learn More about Silicon Labs silabs efm8 laser bee	Datasheet	980In Stock	Cut Tape $3.452 $2.575 $2.347 $2.108 Reel $1.789 View $1.994 $1.948 $1.846 $1.754 MouseReel Available	Min.: 1 Mult.: 1 : 2.500	CIP-51 8051	32 kB	2.25 kB	QFN-24	72 MHz	10 bit/12 bit/14 bit	20 I/O	2.2 V	3.6 V	SMD/SMT	8 bit	- 40 C	+ 105 C	EFM8LB1	Reel, Cut Tape, MouseReel
8-bit Microcontrollers - MCU 8051 50 MHz 64 kB flash 4.25 kB RAM 8-bit Busy Bee MCU EFM8BB31F64G-D-QFN24R Silicon Labs 1: $4.181 2.120In Stock	Mfr. Part # EFM8BB31F64G-D-QFN24R Mouser Part # 634-EF8BB31F64GDF24R	Silicon Labs	8-bit Microcontrollers - MCU 8051 50 MHz 64 kB flash 4.25 kB RAM 8-bit Busy Bee MCU Learn More about Silicon Labs siliconlabs efm8 busy bee	Datasheet	2.120In Stock	Cut Tape $4.181 $2.825 $2.620 $2.279 Reel $1.766 View $2.130 $1.868 $1.766 $1.504 MouseReel Available	Min.: 1 Mult.: 1 : 2.500	CIP-51 8051	64 kB	4.35 kB	QFN-24	50 MHz	10 bit, 12 bit	20 I/O	2.2 V	3.6 V	SMD/SMT	8 bit	- 40 C	+ 85 C		Reel, Cut Tape, MouseReel
8-bit Microcontrollers - MCU 5 Volt 8051 50 Mhz 16 kB flash 1.28 kB RAM 16 GPIO BB5 8-bit MCU EFM8BB51F16I-C-QFN20R Silicon Labs 1: $1.265 12.398In Stock	Mfr. Part # EFM8BB51F16I-C-QFN20R Mouser Part # 634-EFM851F16IQFN20R	Silicon Labs	8-bit Microcontrollers - MCU 5 Volt 8051 50 Mhz 16 kB flash 1.28 kB RAM 16 GPIO BB5 8-bit MCU Learn More about Silicon Labs silabs efm8bb51 efm8bb52 busy bee mcus	Datasheet	12.398In Stock	Cut Tape $1.265 $1.078 $946 $868 Reel $613 View $808 $739 $677 $520	Min.: 1 Mult.: 1 : 2.500		16 kB	1.28 kB	QFN-20			16 I/O	1.8 V	5.5 V	SMD/SMT		- 40 C	+ 85 C		Reel, Cut Tape
8-bit Microcontrollers - MCU 8051 4K FLASH 2.7 TO 5.5V 24MHZ 4V-5.5V AT89C4051-24SU Microchip Technology 1: $1.698 515In Stock	Mfr. Part # AT89C4051-24SU Mouser Part # 556-A89C4051-24SU	Microchip Technology	8-bit Microcontrollers - MCU 8051 4K FLASH 2.7 TO 5.5V 24MHZ 4V-5.5V	Datasheet	515In Stock	$1.698 $1.561 $1.390	Min.: 1 Mult.: 1	8051	4 kB	128 B	SOIC-20	24 MHz	No ADC	15 I/O	4 V	6 V	SMD/SMT	8 bit	- 40 C	+ 85 C	89C	Tube
8-bit Microcontrollers - MCU 8051 50 MHz 64 kB flash 4.25 kB RAM 8-bit Busy Bee MCU EFM8BB31F64G-D-QFN24 Silicon Labs 1: $2.882 5.887In Stock	Mfr. Part # EFM8BB31F64G-D-QFN24 Mouser Part # 634-EF8BB31F64GDQF24	Silicon Labs	8-bit Microcontrollers - MCU 8051 50 MHz 64 kB flash 4.25 kB RAM 8-bit Busy Bee MCU Learn More about Silicon Labs siliconlabs efm8 busy bee	Datasheet	5.887In Stock	$2.882 $2.427 $2.119 $1.982 View $1.777 $1.652 $1.527 $1.470	Min.: 1 Mult.: 1	CIP-51 8051	64 kB	4.35 kB	QFN-24	50 MHz	10 bit, 12 bit	20 I/O	2.2 V	3.6 V	SMD/SMT	8 bit	- 40 C	+ 85 C		Tube
8-bit Microcontrollers - MCU 8051 50 MHz 64 kB flash 4.25 kB RAM 8-bit Busy Bee MCU EFM8BB31F64G-D-QFN32 Silicon Labs 1: $3.179 7.223In Stock	Mfr. Part # EFM8BB31F64G-D-QFN32 Mouser Part # 634-EF8BB31F64GDQN32	Silicon Labs	8-bit Microcontrollers - MCU 8051 50 MHz 64 kB flash 4.25 kB RAM 8-bit Busy Bee MCU Learn More about Silicon Labs siliconlabs efm8 busy bee	Datasheet	7.223In Stock	$3.179 $2.506 $2.244 $2.062 View $1.937 $1.743	Min.: 1 Mult.: 1	CIP-51 8051	64 kB	4.35 kB	QFN-32	50 MHz	10 bit, 12 bit	29 I/O	2.2 V	3.6 V	SMD/SMT	8 bit	- 40 C	+ 85 C		Tray
8-bit Microcontrollers - MCU 5 Volt 8051 50 Mhz 16 kB flash 0.5 kB RAM 9 GPIO BB5 8-bit MCU EFM8BB50F16G-A-QFN12 Silicon Labs 1: $1.128 1.188In Stock	Mfr. Part # EFM8BB50F16G-A-QFN12 Mouser Part # 634-M8BB50F16GAQFN12	Silicon Labs	8-bit Microcontrollers - MCU 5 Volt 8051 50 Mhz 16 kB flash 0.5 kB RAM 9 GPIO BB5 8-bit MCU Learn More about Silicon Labs efm8bb50 mcus	Datasheet	1.188In Stock	$1.128 $812 $731 $643 View $602 $575 $557 $533 $520	Min.: 1 Mult.: 1		16 kB	512 B	QFN-12	50 MHz	12 bit	9 I/O	1.8 V	5.5 V	SMD/SMT	8 bit	- 40 C	+ 85 C	BB50	Cut Tape
8-bit Microcontrollers - MCU 8051 75 MHz 64 kB flash 4.25 kB RAM 8-bit Laser Bee MCU EFM8LB12F64E-C-QFN32R Silicon Labs 1: $4.033 3.867In Stock	Mfr. Part # EFM8LB12F64E-C-QFN32R Mouser Part # 634-LB12F64ECQFN32R	Silicon Labs	8-bit Microcontrollers - MCU 8051 75 MHz 64 kB flash 4.25 kB RAM 8-bit Laser Bee MCU Learn More about Silicon Labs silabs efm8 laser bee	Datasheet	3.867In Stock	Cut Tape $4.033 $3.133 $2.791 $2.563 View Reel $2.028 $2.495 $2.392 $2.028	Min.: 1 Mult.: 1 : 2.500	CIP-51 8051	64 kB	4.25 kB	QFN-32	72 MHz	10 bit/12 bit/14 bit	29 I/O	2.2 V	3.6 V	SMD/SMT	8 bit	- 40 C	+ 105 C	EFM8LB1	Reel, Cut Tape
8-bit Microcontrollers - MCU 5 Volt 8051 50 Mhz 16 kB flash 0.5 kB RAM 12 GPIO BB5 8-bit MCU EFM8BB50F16G-A-QFN16R Silicon Labs 1: $1.162 1.000In Stock	Mfr. Part # EFM8BB50F16G-A-QFN16R Mouser Part # 634-M8BB50F16GAFN16R	Silicon Labs	8-bit Microcontrollers - MCU 5 Volt 8051 50 Mhz 16 kB flash 0.5 kB RAM 12 GPIO BB5 8-bit MCU Learn More about Silicon Labs efm8bb50 mcus	Datasheet	1.000In Stock	Cut Tape $1.162 $837 $754 $663 Reel $549 View $620 $594 $574 $535 MouseReel Available	Min.: 1 Mult.: 1 : 3.000		16 kB	512 B	QFN-16	50 MHz	12 bit	12 I/O	1.8 V	5.5 V	SMD/SMT	8 bit	- 40 C	+ 85 C	BB50	Reel, Cut Tape, MouseReel
8-bit Microcontrollers - MCU 5 Volt 8051 50 Mhz 16 kB flash 0.5 kB RAM 12 GPIO BB5 8-bit MCU EFM8BB50F16G-A-QFN16 Silicon Labs 1: $1.162 968In Stock	Mfr. Part # EFM8BB50F16G-A-QFN16 Mouser Part # 634-M8BB50F16GAQFN16	Silicon Labs	8-bit Microcontrollers - MCU 5 Volt 8051 50 Mhz 16 kB flash 0.5 kB RAM 12 GPIO BB5 8-bit MCU Learn More about Silicon Labs efm8bb50 mcus	Datasheet	968In Stock	$1.162 $837 $754 $663 View $620 $594 $574 $549 $535	Min.: 1 Mult.: 1		16 kB	512 B	QFN-16	50 MHz	12 bit	12 I/O	1.8 V	5.5 V	SMD/SMT	8 bit	- 40 C	+ 85 C	BB50	Cut Tape
8-bit Microcontrollers - MCU 8051 50 MHz 64 kB flash 4.25 kB RAM 8-bit Busy Bee MCU EFM8BB31F64I-D-4QFN24 Silicon Labs 1: $3.418 2.758In Stock	Mfr. Part # EFM8BB31F64I-D-4QFN24 Mouser Part # 634-EF8BB31F64ID4F24	Silicon Labs	8-bit Microcontrollers - MCU 8051 50 MHz 64 kB flash 4.25 kB RAM 8-bit Busy Bee MCU Learn More about Silicon Labs siliconlabs efm8 busy bee	Datasheet	2.758In Stock	$3.418 $2.552 $2.324 $2.267 View $1.982 $1.789	Min.: 1 Mult.: 1	CIP-51 8051	64 kB	4.35 kB	QFN-24	50 MHz	10 bit, 12 bit	20 I/O	2.2 V	3.6 V	SMD/SMT	8 bit	- 40 C	+ 125 C		Tube
8-bit Microcontrollers - MCU 8051 50 MHz 64 kB flash 4.25 kB RAM 8-bit Busy Bee MCU EFM8BB31F64I-D-QFN32 Silicon Labs 1: $3.498 1.517In Stock	Mfr. Part # EFM8BB31F64I-D-QFN32 Mouser Part # 634-EF8BB31F64IDQN32	Silicon Labs	8-bit Microcontrollers - MCU 8051 50 MHz 64 kB flash 4.25 kB RAM 8-bit Busy Bee MCU Learn More about Silicon Labs siliconlabs efm8 busy bee	Datasheet	1.517In Stock	$3.498 $2.609 $2.381 $2.142 View $2.017 $1.971 $1.880 $1.811 $1.777	Min.: 1 Mult.: 1	CIP-51 8051	64 kB	4.35 kB	QFN-32	50 MHz	10 bit, 12 bit	29 I/O	2.2 V	3.6 V	SMD/SMT	8 bit	- 40 C	+ 125 C		Tray
8-bit Microcontrollers - MCU 8051 50 MHz 64 kB flash 4.25 kB RAM 8-bit Busy Bee MCU EFM8BB31F64I-D-QFN32R Silicon Labs 1: $3.486 2.500In Stock	Mfr. Part # EFM8BB31F64I-D-QFN32R Mouser Part # 634-EF8BB31F64IDN32R	Silicon Labs	8-bit Microcontrollers - MCU 8051 50 MHz 64 kB flash 4.25 kB RAM 8-bit Busy Bee MCU Learn More about Silicon Labs siliconlabs efm8 busy bee	Datasheet	2.500In Stock	Cut Tape $3.486 $2.598 $2.370 $2.130 Reel $1.811 View $2.005 $1.960 $1.868 $1.777	Min.: 1 Mult.: 1 : 2.500	CIP-51 8051	64 kB	4.35 kB	QFN-32	50 MHz	10 bit, 12 bit	29 I/O	2.2 V	3.6 V	SMD/SMT	8 bit	- 40 C	+ 125 C		Reel, Cut Tape
8-bit Microcontrollers - MCU 64K Flash 50MHz 8051 1.71V to 5.5V CY8C3246AXI-131 Infineon Technologies 1: $16.861 666In Stock	Mfr. Part # CY8C3246AXI-131 Mouser Part # 727-CY8C3246AXI-131	Infineon Technologies	8-bit Microcontrollers - MCU 64K Flash 50MHz 8051 1.71V to 5.5V Learn More about Infineon Technologies cypresspsoc3	Datasheet	666In Stock	$16.861 $13.090 $11.495 $11.119 View $10.641 $10.516 Quote	Min.: 1 Mult.: 1	8051	64 kB	8 kB	TQFP-100	50 MHz	12 bit	70 I/O	1.71 V	5.5 V	SMD/SMT	8 bit	- 40 C	+ 85 C	CY8C3246	Tray
8-bit Microcontrollers - MCU 5 Volt 8051 50 Mhz 16 kB flash 0.5 kB RAM 12 GPIO BB5 8-bit MCU EFM8BB50F16I-A-SOIC16 Silicon Labs 1: $1.344 959In Stock	Mfr. Part # EFM8BB50F16I-A-SOIC16 Mouser Part # 634-M8BB50F16IASIC16	Silicon Labs	8-bit Microcontrollers - MCU 5 Volt 8051 50 Mhz 16 kB flash 0.5 kB RAM 12 GPIO BB5 8-bit MCU Learn More about Silicon Labs efm8bb50 mcus	Datasheet	959In Stock	$1.344 $1.041 $926 $833 View $779 $746 $722 $689 $672	Min.: 1 Mult.: 1		16 kB	512 B	SOIC-16	50 MHz	12 bit	12 I/O	1.8 V	5.5 V	SMD/SMT	8 bit	- 40 C	+ 125 C	BB50	Tube
8-bit Microcontrollers - MCU 8051 25 MHz 8 kB flash 0.5 kB RAM 8-bit Sleepy Bee MCU EFM8SB10F8G-A-QFN20R Silicon Labs 1: $1.925 408In Stock 4.500Expected 12/4/2026	Mfr. Part # EFM8SB10F8G-A-QFN20R Mouser Part # 634-8SB10F8GAQF20R	Silicon Labs	8-bit Microcontrollers - MCU 8051 25 MHz 8 kB flash 0.5 kB RAM 8-bit Sleepy Bee MCU	Datasheet	408In Stock 4.500Expected 12/4/2026	Cut Tape $1.925 $1.492 $1.322 $1.208 Reel $1.032 View $1.162 $1.069 $1.032 $982 MouseReel Available	Min.: 1 Mult.: 1 : 2.500	CIP-51 8051	8 kB	512 B	QFN-20	25 MHz	12 bit	16 I/O	1.8 V	3.6 V	SMD/SMT	8 bit	- 40 C	+ 85 C		Reel, Cut Tape, MouseReel
8-bit Microcontrollers - MCU 8051 50 MHz 64 kB flash 4.25 kB RAM 8-bit Busy Bee MCU EFM8BB31F64I-D-4QFN24R Silicon Labs 1: $3.247 993In Stock 1.500Expected 11/30/2026	Mfr. Part # EFM8BB31F64I-D-4QFN24R Mouser Part # 634-EF8BB31F64ID424R	Silicon Labs	8-bit Microcontrollers - MCU 8051 50 MHz 64 kB flash 4.25 kB RAM 8-bit Busy Bee MCU Learn More about Silicon Labs siliconlabs efm8 busy bee	Datasheet	993In Stock 1.500Expected 11/30/2026	Cut Tape $3.247 $2.415 $2.210 $1.982 Reel $1.789 View $1.880 $1.834 $1.777 MouseReel Available	Min.: 1 Mult.: 1 : 2.500	CIP-51 8051	64 kB	4.35 kB	QFN-24	50 MHz	10 bit, 12 bit	20 I/O	2.2 V	3.6 V	SMD/SMT	8 bit	- 40 C	+ 125 C		Reel, Cut Tape, MouseReel
8-bit Microcontrollers - MCU 64K Flash 67MHz 8051 0.5V to 5.5V CY8C3866PVI-070 Infineon Technologies 1: $25.201 136In Stock	Mfr. Part # CY8C3866PVI-070 Mouser Part # 727-CY8C3866PVI-070	Infineon Technologies	8-bit Microcontrollers - MCU 64K Flash 67MHz 8051 0.5V to 5.5V Learn More about Infineon Technologies cypresspsoc3	Datasheet	136In Stock	$25.201 $23.161 $17.921 $17.328 View $17.306 $16.394 Quote	Min.: 1 Mult.: 1	8051	64 kB	8 kB	SSOP-48	67 MHz	20 bit	29 I/O	1.71 V	1.89 V	SMD/SMT	8 bit	- 40 C	+ 85 C	CY8C3866	Tube
8-bit Microcontrollers - MCU 8051 25 MHz 8 kB flash 0.5 kB RAM 8-bit Sleepy Bee MCU EFM8SB10F8G-A-CSP16R Silicon Labs 1: $2.267 4.899In Stock 7.500On Order	Mfr. Part # EFM8SB10F8G-A-CSP16R Mouser Part # 634-8SB10F8GA-CSP16R	Silicon Labs	8-bit Microcontrollers - MCU 8051 25 MHz 8 kB flash 0.5 kB RAM 8-bit Sleepy Bee MCU	Datasheet	4.899In Stock 7.500On Order	Cut Tape $2.267 $1.675 $1.527 $1.356 Reel $1.162 View $1.276 $1.230 $1.185 $1.126 MouseReel Available	Min.: 1 Mult.: 1 : 2.500	CIP-51 8051	8 kB	256 B	CSP-16	25 MHz	12 bit	13 I/O	3.6 V	2.2 V	SMD/SMT	8 bit	- 40 C	+ 85 C		Reel, Cut Tape, MouseReel
8-bit Microcontrollers - MCU 64K Flash 50MHz 8051 1.71V to 5.5V CY8C3446AXI-099 Infineon Technologies 1: $19.436 242In Stock	Mfr. Part # CY8C3446AXI-099 Mouser Part # 727-CY8C3446AXI-099	Infineon Technologies	8-bit Microcontrollers - MCU 64K Flash 50MHz 8051 1.71V to 5.5V Learn More about Infineon Technologies cypresspsoc3	Datasheet	242In Stock	$19.436 $14.765 $14.150 $12.464 View $11.860 $11.461 $11.097 Quote	Min.: 1 Mult.: 1	8051	64 kB	8 kB	TQFP-100	50 MHz	12 bit	72 I/O	1.71 V	5.5 V	SMD/SMT	8 bit	- 40 C	+ 85 C	CY8C3446	Tray
8-bit Microcontrollers - MCU 8051 25 MHz 4 kB flash 0.5 kB RAM 8-bit Sleepy Bee MCU EFM8SB10F4G-A-QFN20 Silicon Labs 1: $1.823 2In Stock	Mfr. Part # EFM8SB10F4G-A-QFN20 Mouser Part # 634-8SB10F4GAQF20	Silicon Labs	8-bit Microcontrollers - MCU 8051 25 MHz 4 kB flash 0.5 kB RAM 8-bit Sleepy Bee MCU Learn More about Silicon Labs silabs efm8 sleepy bee	Datasheet	2In Stock	$1.823 $1.333 $1.208 $1.074 View $1.009 $970 $958 $898 $877	Min.: 1 Mult.: 1	CIP-51 8051	4 kB	512 B	QFN-20	25 MHz	12 bit	16 I/O	1.8 V	3.6 V	SMD/SMT	8 bit	- 40 C	+ 85 C		Tube