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8051 microcontroller Microcontrollers - MCU

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Image	Part #	Mfr.	Description	Datasheet	Availability	Pricing (EUR) Filter the results in the table by unit price based on your quantity.	Qty.	Mounting Style	Package/Case	Core	Data Bus Width	Maximum Clock Frequency	Program Memory Size	Data RAM Size	ADC Resolution	Number of I/Os	Supply Voltage - Min	Supply Voltage - Max	Maximum Operating Temperature	Packaging
8-bit Microcontrollers - MCU 5 Volt 8051 50 Mhz 4 kB flash 0.5 kB RAM 12 GPIO BB5 8-bit MCU EFM8BB50F4I-A-SOIC16 Silicon Labs 1: €0.877 648In Stock	Mfr. Part No. EFM8BB50F4I-A-SOIC16 Mouser Part No 634-M8BB50F4IASOIC16	Silicon Labs	8-bit Microcontrollers - MCU 5 Volt 8051 50 Mhz 4 kB flash 0.5 kB RAM 12 GPIO BB5 8-bit MCU Learn More about Silicon Labs efm8bb50 mcus	Datasheet	648In Stock	€0.877 €0.632 €0.569 €0.501 View €0.468 €0.448 €0.433 €0.415 €0.404	Min.: 1 Mult.: 1	SMD/SMT	SOIC-16		8 bit	50 MHz	4 kB	512 B	12 bit	12 I/O	1.8 V	5.5 V	+ 125 C	Tube
8-bit Microcontrollers - MCU 5 Volt 8051 50 Mhz 8 kB flash 0.5 kB RAM 12 GPIO BB5 8-bit MCU EFM8BB50F8G-A-SOIC16 Silicon Labs 1: €0.903 995In Stock	Mfr. Part No. EFM8BB50F8G-A-SOIC16 Mouser Part No 634-M8BB50F8GASOIC16	Silicon Labs	8-bit Microcontrollers - MCU 5 Volt 8051 50 Mhz 8 kB flash 0.5 kB RAM 12 GPIO BB5 8-bit MCU Learn More about Silicon Labs efm8bb50 mcus	Datasheet	995In Stock	€0.903 €0.703 €0.624 €0.559 View €0.523 €0.501 €0.485 €0.463 €0.451	Min.: 1 Mult.: 1	SMD/SMT	SOIC-16		8 bit	50 MHz	8 kB	512 B	12 bit	12 I/O	1.8 V	5.5 V	+ 85 C	Tube
8-bit Microcontrollers - MCU Single Cycle 8051 4K ISP FL AT89LP51-20AU Microchip Technology 1: €1.48 610In Stock	Mfr. Part No. AT89LP51-20AU Mouser Part No 556-AT89LP51-20AU	Microchip Technology	8-bit Microcontrollers - MCU Single Cycle 8051 4K ISP FL Learn More about Microchip Technology atmelat89lp52	Datasheet	610In Stock	€1.48 €1.34 €1.23	Min.: 1 Mult.: 1	SMD/SMT	TQFP-44	8051	8 bit	20 MHz	4 kB	256 B	No ADC	36 I/O	2.4 V	5.5 V	+ 85 C	Tray
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: €2.61 980In Stock	Mfr. Part No. EFM8LB12F32E-C-QFN24R Mouser Part No 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 €2.61 €1.94 €1.77 €1.59 Reel €1.35 View €1.51 €1.47 €1.39 €1.32 MouseReel Available	Min.: 1 Mult.: 1 : 2,500	SMD/SMT	QFN-24	CIP-51 8051	8 bit	72 MHz	32 kB	2.25 kB	10 bit/12 bit/14 bit	20 I/O	2.2 V	3.6 V	+ 105 C	Reel, Cut Tape, MouseReel
8-bit Microcontrollers - MCU 5 Volt 8051 50 Mhz 32 kB flash 2.304 kB RAM 29 GPIO BB5 8-bit MCU EFM8BB52F32G-C-QFN32R Silicon Labs 1: €0.955 4,000In Stock	Mfr. Part No. EFM8BB52F32G-C-QFN32R Mouser Part No 634-EFM852F32GQFN32R	Silicon Labs	8-bit Microcontrollers - MCU 5 Volt 8051 50 Mhz 32 kB flash 2.304 kB RAM 29 GPIO BB5 8-bit MCU Learn More about Silicon Labs silabs efm8bb51 efm8bb52 busy bee mcus	Datasheet	4,000In Stock	Cut Tape €0.955 €0.69 €0.621 €0.546 Reel €0.452 View €0.511 €0.488 €0.473 €0.441	Min.: 1 Mult.: 1 : 2,500	SMD/SMT	QFN-32				16 kB	1.28 kB		16 I/O	1.8 V	5.5 V	+ 85 C	Reel, Cut Tape
8-bit Microcontrollers - MCU 64K Flash 67MHz 8051 0.5V to 5.5V CY8C3866AXI-040 Infineon Technologies 1: €23.14 297In Stock	Mfr. Part No. CY8C3866AXI-040 Mouser Part No 727-CY8C3866AXI-040	Infineon Technologies	8-bit Microcontrollers - MCU 64K Flash 67MHz 8051 0.5V to 5.5V Learn More about Infineon Technologies cypresspsoc3	Datasheet	297In Stock	€23.14 €18.58 €16.30 €15.82 View €15.67 €15.13 Quote	Min.: 1 Mult.: 1	SMD/SMT	TQFP-100	8051	8 bit	67 MHz	64 kB	8 kB	20 bit	72 I/O	1.71 V	1.89 V	+ 85 C	Tray
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: €0.645 706In Stock	Mfr. Part No. EFM8BB50F4G-A-QFN12 Mouser Part No 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	€0.645 €0.499 €0.462 €0.425 View €0.336 €0.322 €0.313	Min.: 1 Mult.: 1	SMD/SMT	QFN-12		8 bit	50 MHz	4 kB	512 B	12 bit	9 I/O	1.8 V	5.5 V	+ 85 C	Cut Tape
8-bit Microcontrollers - MCU 32K Flash 50MHz 8051 1.71V to 5.5V CY8C3245LTI-163 Infineon Technologies 1: €8.39 533In Stock	Mfr. Part No. CY8C3245LTI-163 Mouser Part No 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	€8.39 €6.53 €5.78 €5.55 View €5.29 €4.95 Quote	Min.: 1 Mult.: 1	SMD/SMT	QFN-68	8051	8 bit	50 MHz	32 kB	4 kB	12 bit	46 I/O	1.71 V	5.5 V	+ 85 C	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: €0.74 15,521In Stock	Mfr. Part No. EFM8BB10F2G-A-QFN20R Mouser Part No 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 €0.74 €0.569 €0.508 €0.464 Reel €0.383 View €0.448 €0.413 €0.391 €0.378 MouseReel Available	Min.: 1 Mult.: 1 : 2,500	SMD/SMT	QFN-20	CIP-51 8051	8 bit	25 MHz	2 kB	256 B	12 bit	16 I/O	2.2 V	3.6 V	+ 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 EFM8BB31F64G-D-QFN24 Silicon Labs 1: €2.18 5,887In Stock	Mfr. Part No. EFM8BB31F64G-D-QFN24 Mouser Part No 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	€2.18 €1.83 €1.60 €1.50 View €1.34 €1.25 €1.15 €1.11	Min.: 1 Mult.: 1	SMD/SMT	QFN-24	CIP-51 8051	8 bit	50 MHz	64 kB	4.35 kB	10 bit, 12 bit	20 I/O	2.2 V	3.6 V	+ 85 C	Tube
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: €3.16 2,120In Stock	Mfr. Part No. EFM8BB31F64G-D-QFN24R Mouser Part No 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 €3.16 €2.13 €1.98 €1.72 Reel €1.33 View €1.61 €1.41 €1.33 €1.14 MouseReel Available	Min.: 1 Mult.: 1 : 2,500	SMD/SMT	QFN-24	CIP-51 8051	8 bit	50 MHz	64 kB	4.35 kB	10 bit, 12 bit	20 I/O	2.2 V	3.6 V	+ 85 C	Reel, Cut Tape, MouseReel
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: €3.04 3,872In Stock	Mfr. Part No. EFM8LB12F64E-C-QFN32R Mouser Part No 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	3,872In Stock	Cut Tape €3.04 €2.37 €2.11 €1.94 View Reel €1.53 €1.88 €1.81 €1.53	Min.: 1 Mult.: 1 : 2,500	SMD/SMT	QFN-32	CIP-51 8051	8 bit	72 MHz	64 kB	4.25 kB	10 bit/12 bit/14 bit	29 I/O	2.2 V	3.6 V	+ 105 C	Reel, Cut Tape
8-bit Microcontrollers - MCU 8051 50 MHz 64 kB flash 4.25 kB RAM 8-bit Busy Bee MCU EFM8BB31F64G-D-QFN32R Silicon Labs 1: €2.30 1,148In Stock	Mfr. Part No. EFM8BB31F64G-D-QFN32R Mouser Part No 634-EF8BB31F64GDN32R	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	1,148In Stock	Cut Tape €2.30 €1.70 €1.56 €1.39 Reel €1.20 View €1.32 €1.27 €1.22 €1.16	Min.: 1 Mult.: 1 : 2,500	SMD/SMT	QFN-32	CIP-51 8051	8 bit	50 MHz	64 kB	4.35 kB	10 bit, 12 bit	29 I/O	2.2 V	3.6 V	+ 85 C	Reel, Cut Tape
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: €2.40 1,131In Stock 4,900Expected 27/10/2026	Mfr. Part No. EFM8BB31F64G-D-QFN32 Mouser Part No 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	1,131In Stock 4,900Expected 27/10/2026	€2.40 €1.89 €1.69 €1.56 View €1.46 €1.32	Min.: 1 Mult.: 1	SMD/SMT	QFN-32	CIP-51 8051	8 bit	50 MHz	64 kB	4.35 kB	10 bit, 12 bit	29 I/O	2.2 V	3.6 V	+ 85 C	Tray
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: €0.955 12,398In Stock	Mfr. Part No. EFM8BB51F16I-C-QFN20R Mouser Part No 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 €0.955 €0.814 €0.714 €0.655 Reel €0.463 View €0.61 €0.558 €0.511 €0.413	Min.: 1 Mult.: 1 : 2,500	SMD/SMT	QFN-20				16 kB	1.28 kB		16 I/O	1.8 V	5.5 V	+ 85 C	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: €0.877 1,000In Stock	Mfr. Part No. EFM8BB50F16G-A-QFN16R Mouser Part No 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 €0.877 €0.632 €0.569 €0.501 Reel €0.415 View €0.468 €0.448 €0.433 €0.404 MouseReel Available	Min.: 1 Mult.: 1 : 3,000	SMD/SMT	QFN-16		8 bit	50 MHz	16 kB	512 B	12 bit	12 I/O	1.8 V	5.5 V	+ 85 C	Reel, Cut Tape, MouseReel
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: €0.851 1,205In Stock	Mfr. Part No. EFM8BB50F16G-A-QFN12 Mouser Part No 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	1,205In Stock	€0.851 €0.613 €0.552 €0.485 View €0.454 €0.434 €0.421 €0.402 €0.392	Min.: 1 Mult.: 1	SMD/SMT	QFN-12		8 bit	50 MHz	16 kB	512 B	12 bit	9 I/O	1.8 V	5.5 V	+ 85 C	Cut Tape
8-bit Microcontrollers - MCU 8051 4K FLASH 2.7 TO 5.5V 24MHZ 4V-5.5V AT89C4051-24SU Microchip Technology 1: €1.28 515In Stock	Mfr. Part No. AT89C4051-24SU Mouser Part No 556-A89C4051-24SU	Microchip Technology	8-bit Microcontrollers - MCU 8051 4K FLASH 2.7 TO 5.5V 24MHZ 4V-5.5V	Datasheet	515In Stock	€1.28 €1.18 €1.06	Min.: 1 Mult.: 1	SMD/SMT	SOIC-20	8051	8 bit	24 MHz	4 kB	128 B	No ADC	15 I/O	4 V	6 V	+ 85 C	Tube
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: €0.877 973In Stock	Mfr. Part No. EFM8BB50F16G-A-QFN16 Mouser Part No 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	973In Stock	€0.877 €0.632 €0.569 €0.501 View €0.468 €0.448 €0.433 €0.415 €0.404	Min.: 1 Mult.: 1	SMD/SMT	QFN-16		8 bit	50 MHz	16 kB	512 B	12 bit	12 I/O	1.8 V	5.5 V	+ 85 C	Cut Tape
8-bit Microcontrollers - MCU 64K Flash 50MHz 8051 1.71V to 5.5V CY8C3246AXI-131 Infineon Technologies 1: €12.73 666In Stock	Mfr. Part No. CY8C3246AXI-131 Mouser Part No 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	€12.73 €9.88 €8.68 €8.39 View €8.03 €7.94 Quote	Min.: 1 Mult.: 1	SMD/SMT	TQFP-100	8051	8 bit	50 MHz	64 kB	8 kB	12 bit	70 I/O	1.71 V	5.5 V	+ 85 C	Tray
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: €2.45 995In Stock 1,500Expected 30/11/2026	Mfr. Part No. EFM8BB31F64I-D-4QFN24R Mouser Part No 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	995In Stock 1,500Expected 30/11/2026	Cut Tape €2.45 €1.82 €1.67 €1.50 Reel €1.35 View €1.42 €1.38 €1.34 MouseReel Available	Min.: 1 Mult.: 1 : 2,500	SMD/SMT	QFN-24	CIP-51 8051	8 bit	50 MHz	64 kB	4.35 kB	10 bit, 12 bit	20 I/O	2.2 V	3.6 V	+ 125 C	Reel, Cut Tape, MouseReel
8-bit Microcontrollers - MCU 64K Flash 67MHz 8051 0.5V to 5.5V CY8C3866PVI-070 Infineon Technologies 1: €19.02 136In Stock	Mfr. Part No. CY8C3866PVI-070 Mouser Part No 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	€19.02 €18.46 €13.53 €13.08 View €13.07 €12.38 €11.45 Quote	Min.: 1 Mult.: 1	SMD/SMT	SSOP-48	8051	8 bit	67 MHz	64 kB	8 kB	20 bit	29 I/O	1.71 V	1.89 V	+ 85 C	Tube
8-bit Microcontrollers - MCU 8051 50 MHz 16 kB flash 2.25 kB RAM 8-bit Busy Bee MCU EFM8BB31F16G-D-QFN32R Silicon Labs 1: €1.60 979In Stock	Mfr. Part No. EFM8BB31F16G-D-QFN32R Mouser Part No 634-EF8BB31F16GDN32R	Silicon Labs	8-bit Microcontrollers - MCU 8051 50 MHz 16 kB flash 2.25 kB RAM 8-bit Busy Bee MCU Learn More about Silicon Labs siliconlabs efm8 busy bee	Datasheet	979In Stock	Cut Tape €1.60 €1.32 €1.14 €1.08 Reel €0.813 View €0.946 €0.886 €0.791 MouseReel Available	Min.: 1 Mult.: 1 : 2,500	SMD/SMT	QFN-32	CIP-51 8051	8 bit	50 MHz	16 kB	2.3 kB	10 bit, 12 bit	29 I/O	2.2 V	3.6 V	+ 85 C	Reel, Cut Tape, MouseReel
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: €1.71 4,899In Stock 7,500On Order	Mfr. Part No. EFM8SB10F8G-A-CSP16R Mouser Part No 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 €1.71 €1.26 €1.15 €1.02 Reel €0.877 View €0.963 €0.929 €0.894 €0.85 MouseReel Available	Min.: 1 Mult.: 1 : 2,500	SMD/SMT	CSP-16	CIP-51 8051	8 bit	25 MHz	8 kB	256 B	12 bit	13 I/O	3.6 V	2.2 V	+ 85 C	Reel, Cut Tape, MouseReel
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: €1.38 2In Stock	Mfr. Part No. EFM8SB10F4G-A-QFN20 Mouser Part No 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	€1.38 €1.01 €0.912 €0.811 View €0.762 €0.732 €0.723 €0.678 €0.662	Min.: 1 Mult.: 1	SMD/SMT	QFN-20	CIP-51 8051	8 bit	25 MHz	4 kB	512 B	12 bit	16 I/O	1.8 V	3.6 V	+ 85 C	Tube