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Image	Part #	Mfr.	Description	Datasheet	Availability	Pricing (USD) Filter the results in the table by unit price based on your quantity.	Qty.
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: $1.99 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 $1.99 $1.47 $1.34 $1.19 Reel $1.02 View $1.12 $1.08 $1.04 $0.989 MouseReel Available	Min.: 1 Mult.: 1 : 2,500
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: $1.69 408In Stock 4,500Expected 2026/11/27	Mfr. Part No. EFM8SB10F8G-A-QFN20R Mouser Part No 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 2026/11/27	Cut Tape $1.69 $1.31 $1.16 $1.06 Reel $0.906 View $1.02 $0.939 $0.906 $0.862 MouseReel Available	Min.: 1 Mult.: 1 : 2,500
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: $1.60 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	$1.60 $1.17 $1.06 $0.943 View $0.886 $0.851 $0.841 $0.789 $0.77	Min.: 1 Mult.: 1
8-bit Microcontrollers - MCU 64K Flash 50MHz 8051 1.71V to 5.5V CY8C3446AXI-099 Infineon Technologies 1: $17.06 242In Stock	Mfr. Part No. CY8C3446AXI-099 Mouser Part No 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	$17.06 $12.97 $12.42 $10.94 View $10.41 $10.06 $9.75 Quote	Min.: 1 Mult.: 1
8-bit Microcontrollers - MCU 8051 25 MHz 64 kB flash 4 kB RAM 8-bit Sleepy Bee MCU EFM8SB20F64G-B-QFN32 Silicon Labs 1: $4.50 1,076In Stock End of Life	Mfr. Part No. EFM8SB20F64G-B-QFN32 Mouser Part No 634-EFM8SBF64GBQFN32 End of Life	Silicon Labs	8-bit Microcontrollers - MCU 8051 25 MHz 64 kB flash 4 kB RAM 8-bit Sleepy Bee MCU Learn More about Silicon Labs silabs efm8 sleepy bee	Datasheet	1,076In Stock	$4.50 $2.98 $2.52 $2.31 View $2.20 $1.97 $1.94 $1.77 $1.76	Min.: 1 Mult.: 1
8-bit Microcontrollers - MCU 8051 50 MHz 16 kB flash 2.25 kB RAM 8-bit Busy Bee MCU EFM8BB21F16I-C-QSOP24 Silicon Labs 1: $1.91 3,126In Stock End of Life	Mfr. Part No. EFM8BB21F16I-C-QSOP24 Mouser Part No 634-8BB21F16ICQSOP24 End of Life	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	3,126In Stock	$1.91 $1.62 $1.42 $1.34 View $1.21 $1.03	Min.: 1 Mult.: 1
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: $3.07 1,517In Stock	Mfr. Part No. EFM8BB31F64I-D-QFN32 Mouser Part No 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	$3.07 $2.29 $2.09 $1.88 View $1.77 $1.73 $1.65 $1.59 $1.56	Min.: 1 Mult.: 1
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: $1.17 959In Stock	Mfr. Part No. EFM8BB50F16I-A-SOIC16 Mouser Part No 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	$1.17 $0.914 $0.813 $0.732 View $0.684 $0.655 $0.634 $0.605 $0.59	Min.: 1 Mult.: 1
8-bit Microcontrollers - MCU 32K Flash 50MHz 8051 1.71V to 5.5V CY8C3245LTI-139 Infineon Technologies 1: $9.64 186In Stock	Mfr. Part No. CY8C3245LTI-139 Mouser Part No 727-CY8C3245LTI-139	Infineon Technologies	8-bit Microcontrollers - MCU 32K Flash 50MHz 8051 1.71V to 5.5V Learn More about Infineon Technologies cypresspsoc3	Datasheet	186In Stock	$9.64 $7.50 $6.64 $6.37 View $6.08 $5.91 $5.68 Quote	Min.: 1 Mult.: 1
8-bit Microcontrollers - MCU 8051 50 MHz 16 kB flash 2.25 kB RAM 8-bit Busy Bee MCU EFM8BB21F16A-C-QFN20 Silicon Labs 1: $3.36 2,983In Stock	Mfr. Part No. EFM8BB21F16A-C-QFN20 Mouser Part No 634-EFM8BB21F16FN20	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	2,983In Stock	$3.36 $2.65 $2.37 $2.17 View $2.09 $1.98 $1.93 $1.90 $1.84	Min.: 1 Mult.: 1
8-bit Microcontrollers - MCU 8051 50 MHz 16 kB flash 2.25 kB RAM 8-bit Busy Bee MCU EFM8BB21F16I-C-QFN20 Silicon Labs 1: $1.76 3,254In Stock	Mfr. Part No. EFM8BB21F16I-C-QFN20 Mouser Part No 634-8BB21F16I-CQFN20	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	3,254In Stock	$1.76 $1.48 $1.30 $1.21 View $1.17 $1.02 $0.862 $0.807	Min.: 1 Mult.: 1
8-bit Microcontrollers - MCU 5 Volt 8051 50 Mhz 16 kB flash 1.28 kB RAM 16 GPIO BB5 8-bit MCU EFM8BB52F16G-C-QFN20R Silicon Labs 1: $0.961 874In Stock	Mfr. Part No. EFM8BB52F16G-C-QFN20R Mouser Part No 634-EFM852F16GQFN20R	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	874In Stock	Cut Tape $0.961 $0.691 $0.622 $0.547 Reel $0.454 View $0.511 $0.49 $0.475 $0.442	Min.: 1 Mult.: 1 : 2,500
8-bit Microcontrollers - MCU 5 Volt 8051 50 Mhz 8 kB flash 1.28 kB RAM 16 GPIO BB5 8-bit MCU EFM8BB51F8G-C-QFN20 Silicon Labs 1: $0.99 294In Stock	Mfr. Part No. EFM8BB51F8G-C-QFN20 Mouser Part No 634-EFM8B51F8GCQFN20	Silicon Labs	8-bit Microcontrollers - MCU 5 Volt 8051 50 Mhz 8 kB flash 1.28 kB RAM 16 GPIO BB5 8-bit MCU Learn More about Silicon Labs silabs efm8bb51 efm8bb52 busy bee mcus	Datasheet	294In Stock	$0.99 $0.713 $0.642 $0.564 View $0.528 $0.505 $0.49 $0.468 $0.456	Min.: 1 Mult.: 1
8-bit Microcontrollers - MCU 5 Volt 8051 50 Mhz 16 kB flash 1.28 kB RAM 16 GPIO BB5 8-bit MCU EFM8BB52F16G-C-QFN20 Silicon Labs 1: $0.92 234In Stock	Mfr. Part No. EFM8BB52F16G-C-QFN20 Mouser Part No 634-EFM852F16GCQFN20	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	234In Stock	$0.92 $0.733 $0.522 $0.499 View $0.479 $0.459 $0.447	Min.: 1 Mult.: 1
8-bit Microcontrollers - MCU 5 Volt 8051 50 Mhz 32 kB flash 2.304 kB RAM 29 GPIO BB5 8-bit MCU EFM8BB52F32I-C-QFN32 Silicon Labs 1: $1.20 606In Stock	Mfr. Part No. EFM8BB52F32I-C-QFN32 Mouser Part No 634-EFM852F32ICQFN32	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	606In Stock	$1.20 $1.02 $0.896 $0.80 View $0.739 $0.598 $0.571 $0.557	Min.: 1 Mult.: 1
8-bit Microcontrollers - MCU 5 Volt 8051 50 Mhz 16 kB flash 1.28 kB RAM 16 GPIO BB5 8-bit MCU EFM8BB51F16G-C-QFN20 Silicon Labs 1: $1.08 151In Stock	Mfr. Part No. EFM8BB51F16G-C-QFN20 Mouser Part No 634-EFM851F16GCQFN20	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	151In Stock	$1.08 $0.78 $0.702 $0.618 View $0.577 $0.554 $0.535 $0.511 $0.499	Min.: 1 Mult.: 1
8-bit Microcontrollers - MCU 5 Volt 8051 50 Mhz 32 kB flash 2.304 kB RAM 16 GPIO BB5 8-bit MCU EFM8BB52F32I-C-TSSOP20 Silicon Labs 1: $1.28 402In Stock	Mfr. Part No. EFM8BB52F32I-C-TSSOP20 Mouser Part No 634-EFM852F32ICTOP20	Silicon Labs	8-bit Microcontrollers - MCU 5 Volt 8051 50 Mhz 32 kB flash 2.304 kB RAM 16 GPIO BB5 8-bit MCU Learn More about Silicon Labs silabs efm8bb51 efm8bb52 busy bee mcus	Datasheet	402In Stock	$1.28 $0.999 $0.95 $0.718 View $0.686 $0.668 $0.651	Min.: 1 Mult.: 1
8-bit Microcontrollers - MCU 5 Volt 8051 50 Mhz 16 kB flash 1.28 kB RAM 16 GPIO BB5 8-bit MCU EFM8BB51F16G-C-QFN20R Silicon Labs 1: $0.93 1,016In Stock 7,500On Order	Mfr. Part No. EFM8BB51F16G-C-QFN20R Mouser Part No 634-EFM851F16GQFN20R	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	1,016In Stock 7,500On Order	Cut Tape $0.93 $0.669 $0.604 $0.53 View Reel $0.475 $0.497 $0.476 $0.475	Min.: 1 Mult.: 1 : 2,500
8-bit Microcontrollers - MCU 5 Volt 8051 50 Mhz 16 kB flash 1.28 kB RAM 29 GPIO BB5 8-bit MCU EFM8BB52F16G-C-QFN32 Silicon Labs 1: $0.97 722In Stock 400On Order	Mfr. Part No. EFM8BB52F16G-C-QFN32 Mouser Part No 634-EFM852F16GCQFN32	Silicon Labs	8-bit Microcontrollers - MCU 5 Volt 8051 50 Mhz 16 kB flash 1.28 kB RAM 29 GPIO BB5 8-bit MCU Learn More about Silicon Labs silabs efm8bb51 efm8bb52 busy bee mcus	Datasheet	722In Stock 400On Order	$0.97 $0.744 $0.726 $0.648 View $0.597 $0.486	Min.: 1 Mult.: 1
8-bit Microcontrollers - MCU 5 Volt 8051 50 Mhz 16 kB flash 1.28 kB RAM 16 GPIO BB5 8-bit MCU EFM8BB51F16I-C-QFN20 Silicon Labs 1: $1.14 194In Stock	Mfr. Part No. EFM8BB51F16I-C-QFN20 Mouser Part No 634-EFM851F16ICQFN20	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	194In Stock	$1.14 $0.825 $0.742 $0.654 View $0.611 $0.584 $0.566 $0.541 $0.527	Min.: 1 Mult.: 1
8-bit Microcontrollers - MCU 5 Volt 8051 50 Mhz 16 kB flash 1.28 kB RAM 29 GPIO BB5 8-bit MCU EFM8BB52F16I-C-QFN32 Silicon Labs 1: $0.961 1,045In Stock 2,200On Order	Mfr. Part No. EFM8BB52F16I-C-QFN32 Mouser Part No 634-EFMB52F16ICQFN32	Silicon Labs	8-bit Microcontrollers - MCU 5 Volt 8051 50 Mhz 16 kB flash 1.28 kB RAM 29 GPIO BB5 8-bit MCU Learn More about Silicon Labs silabs efm8bb51 efm8bb52 busy bee mcus	Datasheet	1,045In Stock 2,200On Order	$0.961 $0.67 $0.601 $0.526 View $0.488 $0.479 $0.478	Min.: 1 Mult.: 1
8-bit Microcontrollers - MCU 8051 75 MHz 64 kB flash 4.25 kB RAM 8-bit Laser Bee MCU EFM8LB12F64E-C-QFP32R Silicon Labs 1: $3.97 418In Stock 500Expected 2027/01/15	Mfr. Part No. EFM8LB12F64E-C-QFP32R Mouser Part No 634-LB12F64ECQFP32R	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	418In Stock 500Expected 2027/01/15	Cut Tape $3.97 $2.95 $2.70 $2.42 Reel $2.23 View $2.29 $2.12 $2.05 $2.01	Min.: 1 Mult.: 1 : 500
8-bit Microcontrollers - MCU 5 Volt 8051 50 Mhz 8 kB flash 1.28 kB RAM 16 GPIO BB5 8-bit MCU EFM8BB51F8G-C-TSSOP20 Silicon Labs 1: $1.00 297In Stock	Mfr. Part No. EFM8BB51F8G-C-TSSOP20 Mouser Part No 634-EFM851F8GCTSOP20	Silicon Labs	8-bit Microcontrollers - MCU 5 Volt 8051 50 Mhz 8 kB flash 1.28 kB RAM 16 GPIO BB5 8-bit MCU Learn More about Silicon Labs silabs efm8bb51 efm8bb52 busy bee mcus	Datasheet	297In Stock	$1.00 $0.789 $0.752 $0.583 View $0.573 $0.561 $0.555	Min.: 1 Mult.: 1
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: $2.79 947In Stock 4,900On Order	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	947In Stock 4,900On Order	$2.79 $2.20 $1.97 $1.81 View $1.70 $1.54	Min.: 1 Mult.: 1
8-bit Microcontrollers - MCU 5 Volt 8051 50 Mhz 16 kB flash 0.5 kB RAM 9 GPIO BB5 8-bit MCU EFM8BB50F16I-A-QFN12 Silicon Labs 1: $1.02 100In Stock	Mfr. Part No. EFM8BB50F16I-A-QFN12 Mouser Part No 634-M8BB50F16IAQFN12	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	100In Stock	$1.02 $0.735 $0.662 $0.583 View $0.544 $0.521 $0.504 $0.483 $0.47	Min.: 1 Mult.: 1

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