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CIP-51 8051 Core 8-bit Microcontrollers - MCU

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Part #

8-bit Microcontrollers - MCU 8051 50 MHz 16 kB flash 2.25 kB RAM 8-bit Busy Bee MCU

EFM8BB22F16I-C-QFN28
Silicon Labs
1: £2.38
1In Stock

Mfr. Part No.
EFM8BB22F16I-C-QFN28

Mouser Part No
634-8BB22F16ICQFN28

Silicon Labs

8-bit Microcontrollers - MCU 8051 50 MHz 16 kB flash 2.25 kB RAM 8-bit Busy Bee MCU

Learn More

Datasheet

1In Stock

£2.38

£1.55

£1.42

£1.22

View

Min.: 1
Mult.: 1

CIP-51 8051

16 kB

2.3 kB

QFN-28

50 MHz

12 bit

22 I/O

2.2 V

3.6 V

SMD/SMT

8 bit

- 40 C

+ 125 C

EFM8BB2

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
1,498Expected 15/01/2027

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

Datasheet

1,498Expected 15/01/2027

Cut Tape

£3.35

£2.22

£2.01

£1.71

View

Reel

£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 50 MHz 64 kB flash 4.25 kB RAM 8-bit Busy Bee MCU

EFM8BB31F64I-D-QFN32R
Silicon Labs
1: £3.08
2,430Expected 28/08/2026

Mfr. Part No.
EFM8BB31F64I-D-QFN32R

Mouser Part No
634-EF8BB31F64IDN32R

Silicon Labs

8-bit Microcontrollers - MCU 8051 50 MHz 64 kB flash 4.25 kB RAM 8-bit Busy Bee MCU

Learn More

Datasheet

2,430Expected 28/08/2026

Cut Tape

£3.08

£2.04

£1.86

£1.58

View

Reel

£1.19

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

+ 125 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-QFP32
Silicon Labs
1: £3.90
1,043Expected 16/10/2026

Mfr. Part No.
EFM8LB12F32E-C-QFP32

Mouser Part No
634-LB12F32ECQFP32

Silicon Labs

8-bit Microcontrollers - MCU 8051 75 MHz 32 kB flash 2.25 kB RAM 8-bit Laser Bee MCU

Learn More

Datasheet

1,043Expected 16/10/2026

£3.90

£2.58

£2.35

£2.00

View

Min.: 1
Mult.: 1

CIP-51 8051

32 kB

2.25 kB

QFP-32

72 MHz

10 bit/12 bit/14 bit

28 I/O

2.2 V

3.6 V

SMD/SMT

8 bit

- 40 C

+ 105 C

EFM8LB1

Tray

8-bit Microcontrollers - MCU 8051 25 MHz 8 kB flash 0.5 kB RAM 8-bit Busy Bee MCU

EFM8BB10F8I-A-SOIC16R
Silicon Labs
2,500: £0.516
Non-Stocked Lead-Time 12 Weeks

Mfr. Part No.
EFM8BB10F8I-A-SOIC16R

Mouser Part No
634-8BB10F8IASOIC16R

Silicon Labs

8-bit Microcontrollers - MCU 8051 25 MHz 8 kB flash 0.5 kB RAM 8-bit Busy Bee MCU

Learn More

Datasheet

Non-Stocked Lead-Time 12 Weeks

Reel

£0.516

£0.505

Min.: 2,500
Mult.: 2,500

: 2,500

CIP-51 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

+ 125 C

EFM8BB1

Reel

8-bit Microcontrollers - MCU 8051 25 MHz 4 kB flash 0.5 kB RAM 8-bit Sleepy Bee MCU

EFM8SB10F4G-A-QFN20R
Silicon Labs
1,500: £0.576
Non-Stocked Lead-Time 12 Weeks

Mfr. Part No.
EFM8SB10F4G-A-QFN20R

Mouser Part No
634-8SB10F4GAQF20R

Silicon Labs

8-bit Microcontrollers - MCU 8051 25 MHz 4 kB flash 0.5 kB RAM 8-bit Sleepy Bee MCU

Datasheet

Non-Stocked Lead-Time 12 Weeks

Reel

£0.576

£0.562

Min.: 1,500
Mult.: 1,500

: 1,500

CIP-51 8051

4 kB

512 B

QFN-20

25 MHz

12 bit

16 I/O

1.8 V

3.6 V

SMD/SMT

8 bit

- 40 C

+ 85 C

Reel

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: £0.849
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

Datasheet

Non-Stocked Lead-Time 12 Weeks

Reel

£0.849

£0.811

Min.: 1,500
Mult.: 1,500

: 1,500

CIP-51 8051

16 kB

4.25 kB

25 MHz

10 bit

16 I/O

1.8 V

3.6 V

SMD/SMT

8 bit

- 40 C

+ 85 C

EFM8SB

Reel

8-bit Microcontrollers - MCU 8051 25 MHz 32 kB flash 4 kB RAM 8-bit Sleepy Bee MCU

EFM8SB20F32G-B-QFN24
Silicon Labs
1: £1.66
Non-Stocked Lead-Time 12 Weeks

Mfr. Part No.
EFM8SB20F32G-B-QFN24

Mouser Part No
634-EFM8SBF32GBQFN24

Silicon Labs

8-bit Microcontrollers - MCU 8051 25 MHz 32 kB flash 4 kB RAM 8-bit Sleepy Bee MCU

Learn More

Datasheet

Non-Stocked Lead-Time 12 Weeks

£1.66

£1.40

£1.16

£1.11

View

Min.: 1
Mult.: 1

CIP-51 8051

32 kB

4.25 kB

QFN-24

25 MHz

10 bit

16 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 Flash 0.25 kB RAM 8-bit Busy Bee MCU

EFM8BB10F2A-A-QFN20
Silicon Labs
1: £1.69
Non-Stocked Lead-Time 12 Weeks

Mfr. Part No.
EFM8BB10F2A-A-QFN20

Mouser Part No
634-FM8BB10F2AAQFN20

Silicon Labs

8-bit Microcontrollers - MCU 8051 25 MHz 2 kB Flash 0.25 kB RAM 8-bit Busy Bee MCU

Learn More

Datasheet

Non-Stocked Lead-Time 12 Weeks

£1.69

£1.42

£1.32

£1.16

View

Min.: 1
Mult.: 1

CIP-51 8051

2 kB

256 B

QFN-20

25 MHz

12 bit

16 I/O

2.2 V

3.6 V

SMD/SMT

8 bit

- 40 C

+ 125 C

EFM8BB1

AEC-Q100

Tube

8-bit Microcontrollers - MCU 8051 25 MHz 2 kB Flash 0.25 kB RAM 8-bit Busy Bee MCU

EFM8BB10F2A-A-QFN20R
Silicon Labs
1: £2.62
Non-Stocked Lead-Time 12 Weeks

Mfr. Part No.
EFM8BB10F2A-A-QFN20R

Mouser Part No
634-M8BB10F2AAQFN20R

Silicon Labs

8-bit Microcontrollers - MCU 8051 25 MHz 2 kB Flash 0.25 kB RAM 8-bit Busy Bee MCU

Learn More

Datasheet

Non-Stocked Lead-Time 12 Weeks

Cut Tape

£2.62

£1.73

£1.59

£1.38

View

Reel

£0.96

Min.: 1
Mult.: 1

: 1,500

CIP-51 8051

2 kB

256 B

QFN-20

25 MHz

12 bit

16 I/O

2.2 V

3.6 V

SMD/SMT

8 bit

- 40 C

+ 125 C

EFM8BB1

AEC-Q100

Reel, Cut Tape

8-bit Microcontrollers - MCU 8051 25 MHz 2 kB flash 0.25 kB RAM 8-bit Busy Bee MCU

EFM8BB10F2I-A-QFN20R
Silicon Labs
1: £1.23
Non-Stocked Lead-Time 12 Weeks

Mfr. Part No.
EFM8BB10F2I-A-QFN20R

Mouser Part No
634-M8BB10F2IAQFN20R

Silicon Labs

8-bit Microcontrollers - MCU 8051 25 MHz 2 kB flash 0.25 kB RAM 8-bit Busy Bee MCU

Learn More

Datasheet

Non-Stocked Lead-Time 12 Weeks

Cut Tape

£1.23

£0.788

£0.70

£0.576

Reel

£0.369

View

Min.: 1
Mult.: 1

: 1,500

CIP-51 8051

2 kB

256 B

QFN-20

25 MHz

12 bit

16 I/O

2.2 V

3.6 V

SMD/SMT

8 bit

- 40 C

+ 125 C

EFM8BB1

Reel, Cut Tape

8-bit Microcontrollers - MCU 8051 25 MHz 8 kB flash 0.5 kB RAM 8-bit Busy Bee MCU

EFM8BB10F8A-A-QFN20R
Silicon Labs
1,500: £0.978
Non-Stocked Lead-Time 12 Weeks

Mfr. Part No.
EFM8BB10F8A-A-QFN20R

Mouser Part No
634-M8BB10F8AAQFN20R

Silicon Labs

8-bit Microcontrollers - MCU 8051 25 MHz 8 kB flash 0.5 kB RAM 8-bit Busy Bee MCU

Learn More

Datasheet

Non-Stocked Lead-Time 12 Weeks

Reel

£0.978

Min.: 1,500
Mult.: 1,500

: 1,500

CIP-51 8051

8 kB

512 B

QFN-20

25 MHz

12 bit

16 I/O

2.2 V

3.6 V

SMD/SMT

8 bit

- 40 C

+ 125 C

EFM8BB1

AEC-Q100

Reel

8-bit Microcontrollers - MCU 8051 25 MHz 8 kB flash 0.5 kB RAM 8-bit Busy Bee MCU

EFM8BB10F8I-A-QFN20R
Silicon Labs
1: £1.67
Non-Stocked Lead-Time 12 Weeks

Mfr. Part No.
EFM8BB10F8I-A-QFN20R

Mouser Part No
634-M8BB10F8IAQFN20R

Silicon Labs

8-bit Microcontrollers - MCU 8051 25 MHz 8 kB flash 0.5 kB RAM 8-bit Busy Bee MCU

Learn More

Datasheet

Non-Stocked Lead-Time 12 Weeks

Cut Tape

£1.67

£1.07

£0.943

£0.78

Reel

£0.516

View

Min.: 1
Mult.: 1

: 1,500

CIP-51 8051

8 kB

512 B

QFN-20

25 MHz

12 bit

16 I/O

2.2 V

3.6 V

SMD/SMT

8 bit

- 40 C

+ 125 C

EFM8BB1

Reel, Cut Tape

8-bit Microcontrollers - MCU 8051 25 MHz 8 kB flash 0.5 kB RAM 8-bit Sleepy Bee MCU

EFM8SB10F8A-A-QFN24R
Silicon Labs
1,500: £1.39
Non-Stocked Lead-Time 12 Weeks

Mfr. Part No.
EFM8SB10F8A-A-QFN24R

Mouser Part No
634-M8SB10F8AAQFN24R

Silicon Labs

8-bit Microcontrollers - MCU 8051 25 MHz 8 kB flash 0.5 kB RAM 8-bit Sleepy Bee MCU

Learn More

Datasheet

Non-Stocked Lead-Time 12 Weeks

Reel

£1.39

Min.: 1,500
Mult.: 1,500

: 1,500

CIP-51 8051

8 kB

512 B

QFN-24

25 MHz

12 bit

17 I/O

1.8 V

3.6 V

SMD/SMT

8 bit

- 40 C

+ 85 C

EFM8SB

AEC-Q100

Reel

8-bit Microcontrollers - MCU 8051 50 MHz 16 kB flash 2.25 kB RAM 8-bit Busy Bee MCU

EFM8BB22F16I-C-QFN28R
Silicon Labs
1,500: £0.943
Non-Stocked Lead-Time 31 Weeks

Mfr. Part No.
EFM8BB22F16I-C-QFN28R

Mouser Part No
634-8BB22F16ICQFN28R

Silicon Labs

8-bit Microcontrollers - MCU 8051 50 MHz 16 kB flash 2.25 kB RAM 8-bit Busy Bee MCU

Learn More

Datasheet

Non-Stocked Lead-Time 31 Weeks

Reel

£0.943

Min.: 1,500
Mult.: 1,500

: 1,500

CIP-51 8051

16 kB

2.3 kB

QFN-28

50 MHz

12 bit

22 I/O

2.2 V

3.6 V

SMD/SMT

8 bit

- 40 C

+ 125 C

EFM8BB2

Reel

8-bit Microcontrollers - MCU

EFM8UB11F16G-C-QFN24
Silicon Labs
1,911: £1.01
Non-Stocked Lead-Time 20 Weeks

Mfr. Part No.
EFM8UB11F16G-C-QFN24

Mouser Part No
634-8UB11F16GCQFN24

Silicon Labs

8-bit Microcontrollers - MCU

Datasheet

Non-Stocked Lead-Time 20 Weeks

£1.01

£1.00

Min.: 1,911
Mult.: 1,911

CIP-51 8051

16 kB

2.25 kB

QFN-24

50 MHz

12 bit

17 I/O

2.2 V

3.6 V

SMD/SMT

8 bit

- 40 C

+ 85 C

EFM8UB

Tube

8-bit Microcontrollers - MCU

EFM8UB11F16G-C-QFN24R
Silicon Labs
1,500: £1.02
Non-Stocked Lead-Time 20 Weeks

Mfr. Part No.
EFM8UB11F16G-C-QFN24R

Mouser Part No
634-8UB11F16GCQFN24R

Silicon Labs

8-bit Microcontrollers - MCU

Datasheet

Non-Stocked Lead-Time 20 Weeks

Reel

£1.02

£1.00

Min.: 1,500
Mult.: 1,500

: 1,500

CIP-51 8051

16 kB

2.25 kB

QFN-24

50 MHz

12 bit

17 I/O

2.2 V

3.6 V

SMD/SMT

8 bit

- 40 C

+ 85 C

EFM8UB

Reel

8-bit Microcontrollers - MCU 8051 25 MHz 16 kB 8-bit MCU

C8051F317-GM
Silicon Labs
1,911: £4.25
Non-Stocked Lead-Time 25 Weeks

Mfr. Part No.
C8051F317-GM

Mouser Part No
634-C8051F317-GM

Silicon Labs

8-bit Microcontrollers - MCU 8051 25 MHz 16 kB 8-bit MCU

Datasheet

Non-Stocked Lead-Time 25 Weeks

£4.25

Min.: 1,911
Mult.: 1,911

CIP-51 8051

16 kB

1.28 kB

QFN-24

25 MHz

10 bit

21 I/O

2.7 V

3.6 V

SMD/SMT

8 bit

- 40 C

+ 85 C

C8051F317

Tube

8-bit Microcontrollers - MCU 8051 25 MHz 16 kB 8-bit MCU

C8051F317-GMR
Silicon Labs
1: £8.51
Non-Stocked Lead-Time 25 Weeks

Mfr. Part No.
C8051F317-GMR

Mouser Part No
634-C8051F317-GMR

Silicon Labs

8-bit Microcontrollers - MCU 8051 25 MHz 16 kB 8-bit MCU

Datasheet

Non-Stocked Lead-Time 25 Weeks

Cut Tape

£8.51

£6.63

£6.31

£5.48

View

Reel

£4.54

Min.: 1
Mult.: 1

: 1,500

CIP-51 8051

16 kB

1.28 kB

QFN-24

25 MHz

10 bit

21 I/O

2.7 V

3.6 V

SMD/SMT

8 bit

- 40 C

+ 85 C

C8051F317

Reel, Cut Tape

8-bit Microcontrollers - MCU USB-Flash-16k-ADC-QFN28 OTP available (T321-GM)

C8051F321-GMR
Silicon Labs
1: £12.41
Non-Stocked Lead-Time 24 Weeks

Mfr. Part No.
C8051F321-GMR

Mouser Part No
634-C8051F321-GMR

Silicon Labs

8-bit Microcontrollers - MCU USB-Flash-16k-ADC-QFN28 OTP available (T321-GM)

Datasheet

Non-Stocked Lead-Time 24 Weeks

Cut Tape

£12.41

£9.43

£9.04

£7.96

View

Reel

£7.05

Min.: 1
Mult.: 1

: 1,500

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

Reel, Cut Tape

8-bit Microcontrollers - MCU

C8051F533-C-AT
Silicon Labs
1: £4.37
Non-Stocked

Mfr. Part No.
C8051F533-C-AT

Mouser Part No
634-C8051F533-C-AT

Silicon Labs

8-bit Microcontrollers - MCU

Datasheet

Non-Stocked

£4.37

£3.01

£2.80

£2.46

View

Min.: 1
Mult.: 1

CIP-51 8051

4 kB

256 B

QFN-20

25 MHz

12 bit

16 I/O

2 V

5.25 V

SMD/SMT

8 bit

- 40 C

+ 125 C

C8051F533

AEC-Q100

8-bit Microcontrollers - MCU

C8051F533-C-ATR
Silicon Labs
2,500: £1.75
Non-Stocked

Mfr. Part No.
C8051F533-C-ATR

Mouser Part No
634-C8051F533-C-ATR

Silicon Labs

8-bit Microcontrollers - MCU

Datasheet

Non-Stocked

£1.75

Min.: 2,500
Mult.: 1

CIP-51 8051

4 kB

256 B

QFN-20

25 MHz

12 bit

16 I/O

2 V

5.25 V

SMD/SMT

8 bit

- 40 C

+ 125 C

C8051F533

AEC-Q100

8-bit Microcontrollers - MCU

C8051F534-C-AT
Silicon Labs
1: £4.30
Non-Stocked

Mfr. Part No.
C8051F534-C-AT

Mouser Part No
634-C8051F534-C-AT

Silicon Labs

8-bit Microcontrollers - MCU

Datasheet

Non-Stocked

£4.30

£2.96

£2.76

£2.42

View

Min.: 1
Mult.: 1

CIP-51 8051

4 kB

256 B

QFN-20

25 MHz

12 bit

16 I/O

2 V

5.25 V

SMD/SMT

8 bit

- 40 C

+ 125 C

C8051F534

AEC-Q100

8-bit Microcontrollers - MCU

C8051F534-C-ATR
Silicon Labs
2,500: £1.73
Non-Stocked

Mfr. Part No.
C8051F534-C-ATR

Mouser Part No
634-C8051F534-C-ATR

Silicon Labs

8-bit Microcontrollers - MCU

Datasheet

Non-Stocked

£1.73

Min.: 2,500
Mult.: 1

CIP-51 8051

4 kB

256 B

QFN-20

25 MHz

12 bit

16 I/O

2 V

5.25 V

SMD/SMT

8 bit

- 40 C

+ 125 C

C8051F534

AEC-Q100

8-bit Microcontrollers - MCU

C8051F536-C-AT
Silicon Labs
1: £4.01
Non-Stocked

Mfr. Part No.
C8051F536-C-AT

Mouser Part No
634-C8051F536-C-AT

Silicon Labs

8-bit Microcontrollers - MCU

Datasheet

Non-Stocked

£4.01

£2.76

£2.57

£2.26

View

Min.: 1
Mult.: 1

CIP-51 8051

2 kB

256 B

QFN-20

25 MHz

12 bit

16 I/O

2 V

5.25 V

SMD/SMT

8 bit

- 40 C

+ 125 C

C8051F536

AEC-Q100

CIP-51 8051 Core 8-bit Microcontrollers - MCU

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