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Silicon Labs 8-bit Microcontrollers - MCU

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Image	Part #	Mfr.	Description	Datasheet	Availability	Pricing (GBP) 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	Qualification	Packaging
8-bit Microcontrollers - MCU 50 MIPS, 64 kB, 4 kB, CAN2.0, LIN 2.1, SPI, UART, I2C, QFN32 C8051F502-IMR Silicon Labs 1: £8.66 296In Stock	Mfr. Part No. C8051F502-IMR Mouser Part No 634-C8051F502-IMR	Silicon Labs	8-bit Microcontrollers - MCU 50 MIPS, 64 kB, 4 kB, CAN2.0, LIN 2.1, SPI, UART, I2C, QFN32	Datasheet	296In Stock	Cut Tape £8.66 £6.77 £6.29 £5.76 £5.49 Reel £5.42	Min.: 1 Mult.: 1 : 1,500	8051							1.8 V	5.25 V		8 bit			C8051F502		Reel, Cut Tape
8-bit Microcontrollers - MCU 8051 50 MHz 32 kB 5 V 8-bit MCU C8051F553-IM Silicon Labs 1: £6.51 Non-Stocked Lead-Time 12 Weeks	Mfr. Part No. C8051F553-IM Mouser Part No 634-C8051F553-IM	Silicon Labs	8-bit Microcontrollers - MCU 8051 50 MHz 32 kB 5 V 8-bit MCU	Datasheet	Non-Stocked Lead-Time 12 Weeks	£6.51 £5.40 £4.58 £4.39 View £4.15 £3.53 £3.44	Min.: 1 Mult.: 1	8051	32 kB	2.25 kB	QFN-24	50 MHz	12 bit	18 I/O	1.8 V	5.25 V	SMD/SMT	8 bit	- 40 C	+ 125 C	C8051F553	AEC-Q100	Tube
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: £1.43 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	£1.43 £1.21 £1.07 £1.00 View £0.908 £0.773	Min.: 1 Mult.: 1	CIP-51 8051	16 kB	2.3 kB	QSOP-24	50 MHz	12 bit	21 I/O	2.2 V	3.6 V	SMD/SMT	8 bit	- 40 C	+ 125 C	EFM8BB2		Tube
8-bit Microcontrollers - MCU 100MIPS,128KB,12ADC,100Pin MCU C8051F120-GQ Silicon Labs 1: £38.42 1,137In Stock End of Life	Mfr. Part No. C8051F120-GQ Mouser Part No 634-C8051F120-GQ End of Life	Silicon Labs	8-bit Microcontrollers - MCU 100MIPS,128KB,12ADC,100Pin MCU	Datasheet	1,137In Stock	£38.42 £31.24 £28.69 £28.56 Quote Quote	Min.: 1 Mult.: 1	8051	128 kB	8.25 kB	TQFP-100	100 MHz	8 bit, 12 bit	64 I/O	3 V	3.6 V	SMD/SMT	8 bit	- 40 C	+ 85 C	C8051F120		Tray
8-bit Microcontrollers - MCU 8051 50 MHz 64 kB 5 V 8-bit MCU C8051F501-IM Silicon Labs 1: £9.55 600In Stock End of Life	Mfr. Part No. C8051F501-IM Mouser Part No 634-C8051F501-IM End of Life	Silicon Labs	8-bit Microcontrollers - MCU 8051 50 MHz 64 kB 5 V 8-bit MCU	Datasheet	600In Stock	£9.55 £7.67 £7.03 £6.50 View £6.45 £6.01 £6.00 Quote	Min.: 1 Mult.: 1	8051	64 kB	4.25 kB	QFN-48	50 MHz	12 bit	40 I/O	1.8 V	5.25 V	SMD/SMT	8 bit	- 40 C	+ 125 C	C8051F501	AEC-Q100	Tube
8-bit Microcontrollers - MCU 8051 50 MHz 128 kB 5 V CAN LIN 8-bit MCU C8051F582-IM Silicon Labs 1: £12.00 3,094In Stock End of Life	Mfr. Part No. C8051F582-IM Mouser Part No 634-C8051F582-IM End of Life	Silicon Labs	8-bit Microcontrollers - MCU 8051 50 MHz 128 kB 5 V CAN LIN 8-bit MCU	Datasheet	3,094In Stock	£12.00 £9.96 £8.68 £8.43 View £8.01 £7.50 £7.22	Min.: 1 Mult.: 1	8051	128 kB	8.25 kB	QFN-32	50 MHz	12 bit	25 I/O	1.8 V	5.25 V	SMD/SMT	8 bit	- 40 C	+ 125 C	C8051F582	AEC-Q100	Tube
8-bit Microcontrollers - MCU 8051 50 MHz 64 kB flash 4.25 kB RAM 8-bit Busy Bee MCU EFM8BB31F64I-D-5QFN32 Silicon Labs 1: £3.38 1,358In Stock End of Life	Mfr. Part No. EFM8BB31F64I-D-5QFN32 Mouser Part No 634-EF8BB31F64ID5F32 End of Life	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	1,358In Stock	£3.38 £2.23 £2.04 £1.74 View £1.64 £1.48 £1.37 £1.27	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			Tube
8-bit Microcontrollers - MCU 8051 25 MHz 64 kB flash 4 kB RAM 8-bit Sleepy Bee MCU EFM8SB20F64G-B-QFN32 Silicon Labs 1: £3.38 1,111In 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	1,111In Stock	£3.38 £2.23 £1.89 £1.74 View £1.65 £1.48 £1.46 £1.33 £1.32	Min.: 1 Mult.: 1	CIP-51 8051	64 kB	4.25 kB	QFN-32	25 MHz	10 bit	24 I/O	1.8 V	3.6 V	SMD/SMT	8 bit	- 40 C	+ 85 C	EFM8SB		Tube
8-bit Microcontrollers - MCU 8051 25 MHz 2 kB 8-bit MCU C8051F860-C-GS Silicon Labs 1: £2.02 375In Stock NRND	Mfr. Part No. C8051F860-C-GS Mouser Part No 634-C8051F860-C-GS NRND	Silicon Labs	8-bit Microcontrollers - MCU 8051 25 MHz 2 kB 8-bit MCU Learn More about Silicon Labs silabs c8051f85 c8051f86 mcus	Datasheet	375In Stock	£2.02 £1.76 £1.44 £1.36 View £1.26 £1.22 £1.20 £1.19	Min.: 1 Mult.: 1	8051	8 kB	512 B	SOIC-16	25 MHz	12 bit	13 I/O	2.2 V	3.6 V	SMD/SMT	8 bit	- 40 C	+ 85 C	C8051F860	AEC-Q100	Tube
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: £1.32 3,268In 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	3,268In Stock	£1.32 £1.11 £0.978 £0.908 View £0.882 £0.766 £0.647 £0.606	Min.: 1 Mult.: 1	CIP-51 8051	16 kB	2.3 kB	QFN-20	50 MHz	12 bit	16 I/O	2.2 V	3.6 V	SMD/SMT	8 bit	- 40 C	+ 125 C	EFM8BB2		Tube
8-bit Microcontrollers - MCU 8051 25 MHz 8 kB flash 2 kB RAM 8-bit Universal Bee MCU EFM8UB10F8G-C-QFN20 Silicon Labs 1: £1.34 2,547In Stock 5,040Expected 09/10/2026	Mfr. Part No. EFM8UB10F8G-C-QFN20 Mouser Part No 634-8UB10F8GCQFN20	Silicon Labs	8-bit Microcontrollers - MCU 8051 25 MHz 8 kB flash 2 kB RAM 8-bit Universal Bee MCU	Datasheet	2,547In Stock 5,040Expected 09/10/2026	£1.34 £1.13 £0.995 £0.925 View £0.899 £0.796 £0.738 £0.711 £0.701	Min.: 1 Mult.: 1	CIP-51 8051	8 kB	2.25 kB	QFN-20	50 MHz	12 bit	13 I/O	2.2 V	3.6 V	SMD/SMT	8 bit	- 40 C	+ 85 C	EFM8UB		Tube
8-bit Microcontrollers - MCU 8051 50 MHz 16 kB flash 2.25 kB RAM 8-bit Busy Bee MCU EFM8BB21F16A-C-QFN20R Silicon Labs 1: £3.35 1,498In Stock	Mfr. Part No. EFM8BB21F16A-C-QFN20R Mouser Part No 634-BB21F16ACQFN20R	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	1,498In Stock	Cut Tape £3.35 £2.22 £2.01 £1.71 View Reel £1.42 £1.62 £1.46 £1.42 £1.42	Min.: 1 Mult.: 1 : 1,500	CIP-51 8051	16 kB	2.25 kB	QFN-20	50 MHz	12 bit	16 I/O	2.2 V	3.6 V	SMD/SMT	8 bit	- 40 C	+ 125 C	EFM8BB2	AEC-Q100	Reel, Cut Tape
8-bit Microcontrollers - MCU 8051 25 MHz 16 kB 8-bit MCU C8051F311-GMR Silicon Labs 1: £9.28 905In Stock 3,000Expected 27/11/2026	Mfr. Part No. C8051F311-GMR Mouser Part No 634-C8051F311-GMR	Silicon Labs	8-bit Microcontrollers - MCU 8051 25 MHz 16 kB 8-bit MCU	Datasheet	905In Stock 3,000Expected 27/11/2026	Cut Tape £9.28 £7.39 £6.70 £6.26 View Reel £5.31 £6.23 £5.81 £5.47 £5.31 MouseReel Available	Min.: 1 Mult.: 1 : 1,500	8051	16 kB	1.25 kB	QFN-28	25 MHz	10 bit	25 I/O	2.7 V	3.6 V	SMD/SMT	8 bit	- 40 C	+ 85 C	C8051F311		Reel, Cut Tape, MouseReel
8-bit Microcontrollers - MCU USB-Flash-16k-ADC-QFN28 OTP available (T321-GM) C8051F321-GM Silicon Labs 1: £11.11 178In Stock 1,533Expected 27/11/2026	Mfr. Part No. C8051F321-GM Mouser Part No 634-C8051F321-GM	Silicon Labs	8-bit Microcontrollers - MCU USB-Flash-16k-ADC-QFN28 OTP available (T321-GM)	Datasheet	178In Stock 1,533Expected 27/11/2026	£11.11 £8.97 £8.07 £7.59 View £7.53 £7.16 £6.77	Min.: 1 Mult.: 1	CIP-51 8051	16 kB	2.3 kB	QFN-28	25 MHz	10 bit	21 I/O	2.7 V	3.6 V	SMD/SMT	8 bit	- 40 C	+ 85 C	C8051F321		Tube
8-bit Microcontrollers - MCU 8051 50 MHz 32 kB 8-bit MCU C8051F411-GM Silicon Labs 1: £10.07 1,057In Stock 1,533Expected 20/11/2026	Mfr. Part No. C8051F411-GM Mouser Part No 634-C8051F411-GM	Silicon Labs	8-bit Microcontrollers - MCU 8051 50 MHz 32 kB 8-bit MCU	Datasheet	1,057In Stock 1,533Expected 20/11/2026	£10.07 £8.25 £7.53 £7.11 View £7.08 £6.75 Quote	Min.: 1 Mult.: 1	8051	32 kB	2.31 kB	QFN-28	50 MHz	12 bit	20 I/O	2 V	5.25 V	SMD/SMT	8 bit	- 40 C	+ 85 C	C8051F411		Tube
8-bit Microcontrollers - MCU 8051 50 MHz 32 kB 8-bit MCU C8051F411-GMR Silicon Labs 1: £10.55 437In Stock 1,500Expected 16/10/2026	Mfr. Part No. C8051F411-GMR Mouser Part No 634-C8051F411-GMR	Silicon Labs	8-bit Microcontrollers - MCU 8051 50 MHz 32 kB 8-bit MCU	Datasheet	437In Stock 1,500Expected 16/10/2026	Cut Tape £10.55 £8.61 £7.89 £7.41 View Reel £6.57 £7.37 £7.10 £6.67 £6.57 Quote MouseReel Available	Min.: 1 Mult.: 1 : 1,500	8051	32 kB	2.25 kB	QFN-28	50 MHz	12 bit	20 I/O	2 V	5.25 V	SMD/SMT	8 bit	- 40 C	+ 85 C	C8051F411		Reel, Cut Tape, MouseReel
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: £1.40 4,082In 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	4,082In Stock	Cut Tape £1.40 £1.15 £0.995 £0.943 Reel £0.71 View £0.826 £0.773 £0.691 MouseReel Available	Min.: 1 Mult.: 1 : 2,500	CIP-51 8051	16 kB	2.3 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			Reel, Cut Tape, MouseReel
8-bit Microcontrollers - MCU 8051 50 MHz 32 kB flash 2.25 kB RAM 8-bit Busy Bee MCU EFM8BB31F32I-D-4QFN24R Silicon Labs 1: £2.50 1,520In Stock	Mfr. Part No. EFM8BB31F32I-D-4QFN24R Mouser Part No 634-EF8BB31F32ID424R	Silicon Labs	8-bit Microcontrollers - MCU 8051 50 MHz 32 kB flash 2.25 kB RAM 8-bit Busy Bee MCU Learn More about Silicon Labs siliconlabs efm8 busy bee	Datasheet	1,520In Stock	Cut Tape £2.50 £1.64 £1.52 £1.32 Reel £1.02 View £1.24 £1.08 £1.02 £0.882	Min.: 1 Mult.: 1 : 1,500	CIP-51 8051	32 kB	2.3 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
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: £2.76 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 £2.76 £1.86 £1.73 £1.50 Reel £1.16 View £1.41 £1.23 £1.16 £0.995 MouseReel Available	Min.: 1 Mult.: 1 : 1,500	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 8051 50 MHz 64 kB flash 4.25 kB RAM 8-bit Busy Bee MCU EFM8BB31F64G-D-QFN32R Silicon Labs 1: £2.01 1,398In 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	1,398In Stock	Cut Tape £2.01 £1.48 £1.36 £1.21 Reel £1.05 View £1.15 £1.11 £1.07 £1.01	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	+ 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-QFN24 Silicon Labs 1: £1.90 5,987In 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	5,987In Stock	£1.90 £1.60 £1.40 £1.31 View £1.17 £1.09 £1.00 £0.969	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 EFM8BB31F64I-D-4QFN24R Silicon Labs 1: £2.14 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 £2.14 £1.59 £1.46 £1.31 Reel £1.18 View £1.24 £1.20 £1.17 MouseReel Available	Min.: 1 Mult.: 1 : 1,500	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 8051 50 MHz 64 kB flash 4.25 kB RAM 8-bit Busy Bee MCU EFM8BB31F64I-D-QFN32 Silicon Labs 1: £3.27 1,299In 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	1,299In Stock	£3.27 £2.17 £1.96 £1.68 View £1.59 £1.42 £1.24 £1.22	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 5 Volt 8051 50 Mhz 16 kB flash 1.28 kB RAM 16 GPIO BB5 8-bit MCU EFM8BB51F16I-C-QFN20R Silicon Labs 1: £0.834 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 £0.834 £0.711 £0.623 £0.572 Reel £0.404 View £0.533 £0.487 £0.446 £0.342	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 75 MHz 32 kB flash 2.25 kB RAM 8-bit Laser Bee MCU EFM8LB12F32E-C-QFN24R Silicon Labs 1: £2.17 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 £2.17 £1.62 £1.48 £1.32 Reel £1.20 View £1.25 £1.24 £1.18 MouseReel Available	Min.: 1 Mult.: 1 : 1,500	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