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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 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-TSSOP20 Silicon Labs 1: $1.07 1,452In Stock	Mfr. Part No. EFM8BB51F16G-C-TSSOP20 Mouser Part No 634-EFM8516GCTSSOP20	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	1,452In Stock	$1.07 $0.848 $0.779 $0.718 View $0.601 $0.594	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-QFN20R Silicon Labs 1: $1.11 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 $1.11 $0.947 $0.83 $0.762 Reel $0.538 View $0.709 $0.649 $0.594 $0.48	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-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 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 8051 25 MHz 32 kB flash 4 kB RAM 8-bit Sleepy Bee MCU EFM8SB20F32G-B-QFN24R Silicon Labs 1: $2.48 1,498Expected 2027/01/01	Mfr. Part No. EFM8SB20F32G-B-QFN24R Mouser Part No 634-EFM8SB32GBQFN24R	Silicon Labs	8-bit Microcontrollers - MCU 8051 25 MHz 32 kB flash 4 kB RAM 8-bit Sleepy Bee MCU Learn More about Silicon Labs silabs efm8 sleepy bee	Datasheet	1,498Expected 2027/01/01	Cut Tape $2.48 $2.11 $1.65 $1.44 Reel $1.20 View $1.33 $1.29 $1.24 $1.17	Min.: 1 Mult.: 1 : 1,500
8-bit Microcontrollers - MCU 8051 25 MHz 16 kB flash 4 kB RAM 8-bit Sleepy Bee MCU EFM8SB20F16G-B-QFN24 Silicon Labs 1: $2.13 1,911Expected 2026/11/11 NRND	Mfr. Part No. EFM8SB20F16G-B-QFN24 Mouser Part No 634-EFM8SBF16GBQFN24 NRND	Silicon Labs	8-bit Microcontrollers - MCU 8051 25 MHz 16 kB flash 4 kB RAM 8-bit Sleepy Bee MCU Learn More about Silicon Labs silabs efm8 sleepy bee	Datasheet	1,911Expected 2026/11/11	$2.13 $1.63 $1.45 $1.34 View $1.27 $1.24 $1.21 $1.17	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 EFM8BB52F32G-C-TSSOP20 Silicon Labs 1: $1.40 197Expected 2026/12/18	Mfr. Part No. EFM8BB52F32G-C-TSSOP20 Mouser Part No 634-EFM852F32GCTOP20	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	197Expected 2026/12/18	$1.40 $1.10 $0.973 $0.843 View $0.842 $0.808 $0.772 $0.75 $0.733	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-TSSOP20 Silicon Labs 1: $1.14 179On Order	Mfr. Part No. EFM8BB52F16G-C-TSSOP20 Mouser Part No 634-EFM852F16GCTOP20	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	179On Order	$1.14 $0.854 $0.763 $0.684 View $0.683 $0.65 $0.641 $0.622 $0.606	Min.: 1 Mult.: 1
8-bit Microcontrollers - MCU 5 Volt 8051 50 Mhz 32 kB flash 2.304 kB RAM 25 GPIO BB5 8-bit MCU EFM8BB52F32I-C-TSSOP28 Silicon Labs 1: $1.41 200Expected 2026/12/04	Mfr. Part No. EFM8BB52F32I-C-TSSOP28 Mouser Part No 634-EFM852F32ICTOP28	Silicon Labs	8-bit Microcontrollers - MCU 5 Volt 8051 50 Mhz 32 kB flash 2.304 kB RAM 25 GPIO BB5 8-bit MCU Learn More about Silicon Labs silabs efm8bb51 efm8bb52 busy bee mcus	Datasheet	200Expected 2026/12/04	$1.41 $1.10 $0.976 $0.877 View $0.848 $0.794 $0.776 $0.765 $0.756	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 EFM8BB52F16I-C-TSSOP20 Silicon Labs 1: $1.17 198Expected 2027/01/01	Mfr. Part No. EFM8BB52F16I-C-TSSOP20 Mouser Part No 634-EFM852F16ITSOP20	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	198Expected 2027/01/01	$1.17 $0.847 $0.762 $0.67 View $0.627 $0.60 $0.582 $0.555 $0.541	Min.: 1 Mult.: 1
Development Boards & Kits - 8051 EFM8BB1LCK Silicon Labs 1: $20.31 4In Stock 42On Order End of Life	Mfr. Part No. EFM8BB1LCK Mouser Part No 634-EFM8BB1LCK End of Life	Silicon Labs	Development Boards & Kits - 8051	Datasheet	4In Stock 42On Order	$20.31 Quote Quote	Min.: 1 Mult.: 1
8-bit Microcontrollers - MCU 8051 25 MHz 16 kB flash 4 kB RAM 8-bit Sleepy Bee MCU EFM8SB20F16G-B-QFN24R Silicon Labs 1,500: $1.16 Non-Stocked Lead-Time 12 Weeks	Mfr. Part No. EFM8SB20F16G-B-QFN24R Mouser Part No 634-EFM8SB16GBQFN24R	Silicon Labs	8-bit Microcontrollers - MCU 8051 25 MHz 16 kB flash 4 kB RAM 8-bit Sleepy Bee MCU Learn More about Silicon Labs silabs efm8 sleepy bee	Datasheet	Non-Stocked Lead-Time 12 Weeks	Reel $1.16 $1.13	Min.: 1,500 Mult.: 1,500 : 1,500
8-bit Microcontrollers - MCU 8051 25 MHz 32 kB flash 4 kB RAM 8-bit Sleepy Bee MCU EFM8SB20F32G-B-QFN24 Silicon Labs 1: $2.47 Non-Stocked Lead-Time 12 Weeks NRND	Mfr. Part No. EFM8SB20F32G-B-QFN24 Mouser Part No 634-EFM8SBF32GBQFN24 NRND	Silicon Labs	8-bit Microcontrollers - MCU 8051 25 MHz 32 kB flash 4 kB RAM 8-bit Sleepy Bee MCU Learn More about Silicon Labs silabs efm8 sleepy bee	Datasheet	Non-Stocked Lead-Time 12 Weeks	$2.47 $1.83 $1.66 $1.48 View $1.40 $1.36 $1.31 $1.27 $1.24	Min.: 1 Mult.: 1
8-bit Microcontrollers - MCU Silicon Labs EFM8BB52F32G-A-QFN32 EFM8BB52F32G-A-QFN32 Silicon Labs 1: $1.08 Non-Stocked	Mfr. Part No. EFM8BB52F32G-A-QFN32 Mouser Part No 634-EFM8B52F32GAFN32	Silicon Labs	8-bit Microcontrollers - MCU Learn More about Silicon Labs silabs efm8bb51 efm8bb52 busy bee mcus	Datasheet	Non-Stocked	$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 16 kB flash 1.28 kB RAM 16 GPIO BB5 8-bit MCU EFM8BB51F16G-C-TSSOP20R Silicon Labs 1: $1.17 Non-Stocked Lead-Time 24 Weeks	Mfr. Part No. EFM8BB51F16G-C-TSSOP20R Mouser Part No 634-EFM851GCTSSOP20R	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	Non-Stocked Lead-Time 24 Weeks	Cut Tape $1.17 $0.847 $0.762 $0.67 Reel $0.555 View $0.627 $0.60 $0.582 $0.541	Min.: 1 Mult.: 1 : 2,500
8-bit Microcontrollers - MCU 5 Volt 8051 50 Mhz 16 kB flash 1.28 kB RAM 16 GPIO BB5 8-bit MCU EFM8BB52F16I-C-TSSOP20R Silicon Labs 2,500: $0.555 Non-Stocked Lead-Time 24 Weeks	Mfr. Part No. EFM8BB52F16I-C-TSSOP20R Mouser Part No 634-EFM852F16ITOP20R	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	Non-Stocked Lead-Time 24 Weeks	Reel $0.555 $0.541	Min.: 2,500 Mult.: 2,500 : 2,500
8-bit Microcontrollers - MCU 5 Volt 8051 50 Mhz 32 kB flash 2.304 kB RAM 25 GPIO BB5 8-bit MCU EFM8BB52F32G-C-TSSOP28 Silicon Labs 1: $1.37 Non-Stocked Lead-Time 24 Weeks	Mfr. Part No. EFM8BB52F32G-C-TSSOP28 Mouser Part No 634-EFM852F32GCTOP28	Silicon Labs	8-bit Microcontrollers - MCU 5 Volt 8051 50 Mhz 32 kB flash 2.304 kB RAM 25 GPIO BB5 8-bit MCU Learn More about Silicon Labs silabs efm8bb51 efm8bb52 busy bee mcus	Datasheet	Non-Stocked Lead-Time 24 Weeks	$1.37 $0.99 $0.904 $0.799 View $0.748 $0.718 $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 29 GPIO BB5 8-bit MCU EFM8BB52F16G-C-QFN32R Silicon Labs 1: $0.961 Non-Stocked Lead-Time 24 Weeks	Mfr. Part No. EFM8BB52F16G-C-QFN32R Mouser Part No 634-EFM852F16GQFN32R	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	Non-Stocked Lead-Time 24 Weeks	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 EFM8BB51F8I-C-TSSOP20R Silicon Labs 2,500: $0.541 Non-Stocked Lead-Time 24 Weeks	Mfr. Part No. EFM8BB51F8I-C-TSSOP20R Mouser Part No 634-EFM851F8ICTOP20R	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	Non-Stocked Lead-Time 24 Weeks	Reel $0.541 $0.527	Min.: 2,500 Mult.: 2,500 : 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-QFN20R Silicon Labs 1: $0.99 Non-Stocked Lead-Time 24 Weeks	Mfr. Part No. EFM8BB51F8G-C-QFN20R Mouser Part No 634-EFM851F8GCQFN20R	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	Non-Stocked Lead-Time 24 Weeks	Cut Tape $0.99 $0.713 $0.642 $0.564 Reel $0.468 View $0.528 $0.505 $0.49 $0.456	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 EFM8BB52F16I-C-QFN32R Silicon Labs 1: $1.02 Non-Stocked Lead-Time 24 Weeks	Mfr. Part No. EFM8BB52F16I-C-QFN32R Mouser Part No 634-EFM852F16IQFN32R	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	Non-Stocked Lead-Time 24 Weeks	Cut Tape $1.02 $0.735 $0.662 $0.583 Reel $0.483 View $0.544 $0.521 $0.504 $0.47	Min.: 1 Mult.: 1 : 2,500
8-bit Microcontrollers - MCU 5 Volt 8051 50 Mhz 32 kB flash 2.304 kB RAM 16 GPIO BB5 8-bit MCU EFM8BB52F32G-C-QFN20 Silicon Labs 1: $1.15 Lead-Time 24 Weeks	Mfr. Part No. EFM8BB52F32G-C-QFN20 Mouser Part No 634-EFM852F32GCQFN20	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	Lead-Time 24 Weeks	$1.15 $0.826 $0.752 $0.702 View $0.672 $0.651 $0.622 $0.606	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-TSSOP20R Silicon Labs 2,500: $0.668 Non-Stocked Lead-Time 24 Weeks	Mfr. Part No. EFM8BB52F32I-C-TSSOP20R Mouser Part No 634-EFM852F32ITOP20R	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	Non-Stocked Lead-Time 24 Weeks	Reel $0.668 $0.651	Min.: 2,500 Mult.: 2,500 : 2,500
8-bit Microcontrollers - MCU 5 Volt 8051 50 Mhz 16 kB flash 1.28 kB RAM 25 GPIO BB5 8-bit MCU EFM8BB52F16G-C-TSSOP28R Silicon Labs 2,500: $0.58 Non-Stocked Lead-Time 24 Weeks	Mfr. Part No. EFM8BB52F16G-C-TSSOP28R Mouser Part No 634-EFM852F16GTOP28R	Silicon Labs	8-bit Microcontrollers - MCU 5 Volt 8051 50 Mhz 16 kB flash 1.28 kB RAM 25 GPIO BB5 8-bit MCU Learn More about Silicon Labs silabs efm8bb51 efm8bb52 busy bee mcus	Datasheet	Non-Stocked Lead-Time 24 Weeks	Reel $0.58 $0.566	Min.: 2,500 Mult.: 2,500 : 2,500

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