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Image	Part #	Mfr.	Description	Datasheet	Availability	Pricing (JPY) Filter the results in the table by unit price based on your quantity.	Qty.
8-bit Microcontrollers - MCU 8051 25 MHz 2 kB flash 0.25 kB RAM 8-bit Busy Bee MCU EFM8BB10F2I-A-QFN20 Silicon Labs 1: ¥169.4 3,156In Stock	Mfr. Part # EFM8BB10F2I-A-QFN20 Mouser Part # 634-EFM8BB10F2IAFN20	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	3,156In Stock	¥169.4 ¥129.6 ¥116.6 ¥102.5 View ¥95.8 ¥91.9 ¥88.9 ¥84.9 ¥82.9	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: ¥558.1 2,983In Stock	Mfr. Part # EFM8BB21F16A-C-QFN20 Mouser Part # 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	¥558.1 ¥440.2 ¥393.7 ¥360.4 View ¥347.1 ¥328.9 ¥320.6 ¥313.9 ¥305.6	Min.: 1 Mult.: 1
Development Boards & Kits - 8051 EFM8BB3 Busy Bee Starter Kit SLSTK2022A Silicon Labs 1: ¥17,772.7 9In Stock	Mfr. Part # SLSTK2022A Mouser Part # 634-SLSTK2022A	Silicon Labs	Development Boards & Kits - 8051 EFM8BB3 Busy Bee Starter Kit Learn More about Silicon Labs silabs efm8bb3 slstk2022a	Datasheet	9In Stock	¥17,772.7	Min.: 1 Mult.: 1
Development Boards & Kits - 8051 EFM8BB1LCK Silicon Labs 1: ¥3,371.8 4In Stock 42On Order End of Life	Mfr. Part # EFM8BB1LCK Mouser Part # 634-EFM8BB1LCK End of Life	Silicon Labs	Development Boards & Kits - 8051	Datasheet	4In Stock 42On Order	¥3,371.8 Quote Quote	Min.: 1 Mult.: 1
8-bit Microcontrollers - MCU 8051 48 MHz 32 kB flash 2 kB RAM 8-bit Universal Bee MCU EFM8UB20F32G-B-QFN32R Silicon Labs 1: ¥564.7 10,527In Stock	Mfr. Part # EFM8UB20F32G-B-QFN32R Mouser Part # 634-EFM8UB32GBQFN32R	Silicon Labs	8-bit Microcontrollers - MCU 8051 48 MHz 32 kB flash 2 kB RAM 8-bit Universal Bee MCU	Datasheet	10,527In Stock	Cut Tape ¥564.7 ¥426.9 ¥390.3 ¥350.5 Reel ¥295.7 View ¥330.5 ¥323.9 ¥307.3 ¥290.7	Min.: 1 Mult.: 1 : 2,500
8-bit Microcontrollers - MCU 8051 25 MHz 64 kB flash 4 kB RAM 8-bit Sleepy Bee MCU EFM8SB20F64G-B-QFN24R Silicon Labs 1: ¥500 1,500In Stock	Mfr. Part # EFM8SB20F64G-B-QFN24R Mouser Part # 634-EFM8SB64GBQFN24R	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	1,500In Stock	Cut Tape ¥500 ¥375.4 ¥342.2 ¥307.3 Reel ¥259.1 View ¥290.7 ¥284 ¥270.7 ¥255.8 MouseReel Available	Min.: 1 Mult.: 1 : 1,500
8-bit Microcontrollers - MCU 5 Volt 8051 50 Mhz 16 kB flash 1.28 kB RAM 25 GPIO BB5 8-bit MCU EFM8BB52F16G-C-TSSOP28 Silicon Labs 1: ¥199.3 8,033In Stock	Mfr. Part # EFM8BB52F16G-C-TSSOP28 Mouser Part # 634-EFM852F16GTSOP28	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	8,033In Stock	¥199.3 ¥144.3 ¥130.7 ¥115.4 View ¥108.1 ¥103.6 ¥99.2 ¥96.3 ¥94	Min.: 1 Mult.: 1
8-bit Microcontrollers - MCU 8051 48 MHz 32 kB flash 2 kB RAM 8-bit Universal Bee MCU EFM8UB20F32G-B-QFN32 Silicon Labs 1: ¥551.5 587In Stock NRND	Mfr. Part # EFM8UB20F32G-B-QFN32 Mouser Part # 634-EFM8UBF32GBQFN32 NRND	Silicon Labs	8-bit Microcontrollers - MCU 8051 48 MHz 32 kB flash 2 kB RAM 8-bit Universal Bee MCU	Datasheet	587In Stock	¥551.5 ¥426.9 ¥383.7 ¥350.5 View ¥330.5 ¥323.9 ¥307.3 ¥297.3 ¥290.7	Min.: 1 Mult.: 1
8-bit Microcontrollers - MCU 8051 25 MHz 64 kB flash 4 kB RAM 8-bit Sleepy Bee MCU EFM8SB20F64G-B-QFN24 Silicon Labs 1: ¥504.9 2,654In Stock NRND	Mfr. Part # EFM8SB20F64G-B-QFN24 Mouser Part # 634-EFM8SBF64GBQFN24 NRND	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	2,654In Stock	¥504.9 ¥385.4 ¥343.8 ¥310.6 View ¥302.3 ¥289 ¥280.7 ¥277.4	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 EFM8BB52F32G-C-QFN32 Silicon Labs 1: ¥161.1 1,681In Stock	Mfr. Part # EFM8BB52F32G-C-QFN32 Mouser Part # 634-EFM852F32GCQFN32	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	1,681In Stock	¥161.1 ¥114.9 ¥103.5 ¥91 View ¥84.9 ¥81.2 ¥78.7 ¥75.2 ¥73.4	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-QFN20R Silicon Labs 1: ¥196 Non-Stocked Lead-Time 24 Weeks	Mfr. Part # EFM8BB52F32I-C-QFN20R Mouser Part # 634-EFM852F32IQFN20R	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	Cut Tape ¥196 ¥140.9 ¥126.7 ¥111.5 Reel ¥92.2 View ¥104.3 ¥99.8 ¥96.7 ¥89.9	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-TSSOP20 Silicon Labs 1: ¥189.4 166In Stock	Mfr. Part # EFM8BB51F8I-C-TSSOP20 Mouser Part # 634-EFM851F8ICTSOP20	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	166In Stock	¥189.4 ¥136.9 ¥123.2 ¥108.5 View ¥101.3 ¥97 ¥94 ¥89.9 ¥87.5	Min.: 1 Mult.: 1
8-bit Microcontrollers - MCU 5 Volt 8051 50 Mhz 16 kB flash 1.28 kB RAM 25 GPIO BB5 8-bit MCU EFM8BB52F16I-C-TSSOP28R Silicon Labs 1: ¥197.7 2,435In Stock	Mfr. Part # EFM8BB52F16I-C-TSSOP28R Mouser Part # 634-EFM852F16ITOP28R	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	2,435In Stock	Cut Tape ¥197.7 ¥144.3 ¥130.6 ¥115.3 Reel ¥96.3 View ¥108.1 ¥103.6 ¥99.2 ¥94	Min.: 1 Mult.: 1 : 2,500
8-bit Microcontrollers - MCU 5 Volt 8051 50 Mhz 32 kB flash 2.304 kB RAM 29 GPIO BB5 8-bit MCU EFM8BB52F32I-C-QFN32R Silicon Labs 1: ¥201 11,275In Stock	Mfr. Part # EFM8BB52F32I-C-QFN32R Mouser Part # 634-EFM852F32IQFN32R	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	11,275In Stock	Cut Tape ¥201 ¥144.5 ¥130.1 ¥114.4 Reel ¥94.7 View ¥107 ¥102.5 ¥99.2 ¥92.4	Min.: 1 Mult.: 1 : 2,500
8-bit Microcontrollers - MCU 8051 48 MHz 64 kB flash 4 kB RAM 8-bit Universal Bee MCU EFM8UB20F64G-B-QFN32R Silicon Labs 1: ¥661.1 69In Stock	Mfr. Part # EFM8UB20F64G-B-QFN32R Mouser Part # 634-EFM8UB64GBQFN32R	Silicon Labs	8-bit Microcontrollers - MCU 8051 48 MHz 64 kB flash 4 kB RAM 8-bit Universal Bee MCU	Datasheet	69In Stock	Cut Tape ¥661.1 ¥491.7 ¥450.1 ¥403.6 Reel ¥343.8 View ¥382 ¥372.1 ¥353.8 ¥337.2	Min.: 1 Mult.: 1 : 2,500
8-bit Microcontrollers - MCU 8051 25 MHz 64 kB flash 4 kB RAM 8-bit Sleepy Bee MCU EFM8SB20F64G-B-QFN32 Silicon Labs 1: ¥747.5 1,076In Stock End of Life	Mfr. Part # EFM8SB20F64G-B-QFN32 Mouser Part # 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	¥747.5 ¥495 ¥418.6 ¥383.7 View ¥365.4 ¥327.2 ¥322.2 ¥294 ¥292.3	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: ¥179.4 151In Stock	Mfr. Part # EFM8BB51F16G-C-QFN20 Mouser Part # 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	¥179.4 ¥129.6 ¥116.6 ¥102.5 View ¥95.8 ¥91.9 ¥88.9 ¥84.9 ¥82.9	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 EFM8BB52F32G-C-QFN32R Silicon Labs 1: ¥184.4 4,000In Stock	Mfr. Part # EFM8BB52F32G-C-QFN32R Mouser Part # 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 ¥184.4 ¥133.2 ¥119.9 ¥105.5 Reel ¥87.4 View ¥98.7 ¥94.3 ¥91.4 ¥85.2	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: ¥161.1 722In Stock 400On Order	Mfr. Part # EFM8BB52F16G-C-QFN32 Mouser Part # 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	¥161.1 ¥123.6 ¥120.6 ¥107.6 View ¥99 ¥80.7	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: ¥189.4 194In Stock	Mfr. Part # EFM8BB51F16I-C-QFN20 Mouser Part # 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	¥189.4 ¥136.9 ¥123.2 ¥108.5 View ¥101.3 ¥97 ¥94 ¥89.9 ¥87.5	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: ¥166.1 1,452In Stock	Mfr. Part # EFM8BB51F16G-C-TSSOP20 Mouser Part # 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	¥166.1 ¥131.4 ¥129.4 ¥119.3 View ¥92.2 ¥89.9	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: ¥152.8 234In Stock	Mfr. Part # EFM8BB52F16G-C-QFN20 Mouser Part # 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	¥152.8 ¥121.8 ¥86.7 ¥82.9 View ¥79.6 ¥76.2 ¥74.2	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: ¥199.3 606In Stock	Mfr. Part # EFM8BB52F32I-C-QFN32 Mouser Part # 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	¥199.3 ¥169.4 ¥148.7 ¥132.9 View ¥122.6 ¥99.3 ¥94.8 ¥92.5	Min.: 1 Mult.: 1
8-bit Microcontrollers - MCU 8051 48 MHz 64 kB flash 4 kB RAM 8-bit Universal Bee MCU EFM8UB20F64G-B-QFN32 Silicon Labs 1: ¥617.9 284In Stock	Mfr. Part # EFM8UB20F64G-B-QFN32 Mouser Part # 634-EFM8UBF64GBQFN32	Silicon Labs	8-bit Microcontrollers - MCU 8051 48 MHz 64 kB flash 4 kB RAM 8-bit Universal Bee MCU	Datasheet	284In Stock	¥617.9 ¥485 ¥428.5 ¥395.3 View ¥367.1 ¥353.8 ¥347.1 ¥345.5	Min.: 1 Mult.: 1
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: ¥184.4 297In Stock	Mfr. Part # EFM8BB51F8G-C-TSSOP20 Mouser Part # 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	¥184.4 ¥133.2 ¥119.9 ¥105.5 View ¥98.7 ¥94.3 ¥91.4 ¥87.4 ¥85.2	Min.: 1 Mult.: 1

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