8-bit Microcontrollers - MCU – Mouser United Kingdom

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EFM8BB50 Busy Bee 8-Bit MCUs

Silicon Labs EFM8BB50 Busy Bee 8-Bit MCUs are part of the wide supply 5V EFM8 family of MCUs. The Silicon Labs EFM8BB50 is a multi-purpose line of 8-bit microcontrollers with a comprehensive feature set in small packages. These devices offer high value by integrating advanced analogue and communication peripherals into small packages, making them ideal for space-constrained applications. With an efficient 8051 core, 5V capable I/O, precision analogue and enhanced pulse-width modulation, the EFM8BB50 family is also ideal for embedded applications.

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Part #

8-bit Microcontrollers - MCU 5 Volt 8051 50 Mhz 8 kB flash 0.5 kB RAM 9 GPIO BB5 8-bit MCU

EFM8BB50F8G-A-QFN12
Silicon Labs
1: £1.50
10,835In Stock

Mfr. Part No.
EFM8BB50F8G-A-QFN12

Mouser Part No
634-M8BB50F8GAQFN12

Silicon Labs

8-bit Microcontrollers - MCU 5 Volt 8051 50 Mhz 8 kB flash 0.5 kB RAM 9 GPIO BB5 8-bit MCU

Learn More

Datasheet

10,835In Stock

£1.50

£0.917

£0.773

£0.582

View

Min.: 1
Mult.: 1

8 kB

512 B

QFN-12

50 MHz

12 bit

9 I/O

1.8 V

5.5 V

SMD/SMT

8 bit

- 40 C

+ 85 C

BB50

Cut Tape

8-bit Microcontrollers - MCU 5 Volt 8051 50 Mhz 16 kB flash 0.5 kB RAM 12 GPIO BB5 8-bit MCU

EFM8BB50F16G-A-QFN16
Silicon Labs
1: £1.25
973In Stock

Mfr. Part No.
EFM8BB50F16G-A-QFN16

Mouser Part No
634-M8BB50F16GAQFN16

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

Datasheet

973In Stock

£1.25

£0.796

£0.707

£0.582

View

Min.: 1
Mult.: 1

16 kB

512 B

QFN-16

50 MHz

12 bit

12 I/O

1.8 V

5.5 V

SMD/SMT

8 bit

- 40 C

+ 85 C

BB50

Cut Tape

8-bit Microcontrollers - MCU 5 Volt 8051 50 Mhz 16 kB flash 0.5 kB RAM 12 GPIO BB5 8-bit MCU

EFM8BB50F16G-A-SOIC16
Silicon Labs
1: £1.50
1,548In Stock

Mfr. Part No.
EFM8BB50F16G-A-SOIC16

Mouser Part No
634-M8BB50F16GASIC16

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

Datasheet

1,548In Stock

£1.50

£0.96

£0.856

£0.58

View

Min.: 1
Mult.: 1

16 kB

512 B

SOIC-16

50 MHz

12 bit

12 I/O

1.8 V

5.5 V

SMD/SMT

8 bit

- 40 C

+ 85 C

BB50

Tube

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: £1.54
961In 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

Datasheet

961In Stock

£1.54

£0.986

£0.882

£0.722

View

Min.: 1
Mult.: 1

16 kB

512 B

SOIC-16

50 MHz

12 bit

12 I/O

1.8 V

5.5 V

SMD/SMT

8 bit

- 40 C

+ 125 C

BB50

Tube

8-bit Microcontrollers - MCU 5 Volt 8051 50 Mhz 4 kB flash 0.5 kB RAM 9 GPIO BB5 8-bit MCU

EFM8BB50F4G-A-QFN12
Silicon Labs
1: £1.32
706In Stock

Mfr. Part No.
EFM8BB50F4G-A-QFN12

Mouser Part No
634-M8BB50F4GAQFN12

Silicon Labs

8-bit Microcontrollers - MCU 5 Volt 8051 50 Mhz 4 kB flash 0.5 kB RAM 9 GPIO BB5 8-bit MCU

Learn More

Datasheet

706In Stock

£1.32

£0.803

£0.675

£0.512

View

Min.: 1
Mult.: 1

4 kB

512 B

QFN-12

50 MHz

12 bit

9 I/O

1.8 V

5.5 V

SMD/SMT

8 bit

- 40 C

+ 85 C

BB50

Cut Tape

8-bit Microcontrollers - MCU 5 Volt 8051 50 Mhz 4 kB flash 0.5 kB RAM 12 GPIO BB5 8-bit MCU

EFM8BB50F4I-A-SOIC16
Silicon Labs
1: £1.25
663In Stock

Mfr. Part No.
EFM8BB50F4I-A-SOIC16

Mouser Part No
634-M8BB50F4IASOIC16

Silicon Labs

8-bit Microcontrollers - MCU 5 Volt 8051 50 Mhz 4 kB flash 0.5 kB RAM 12 GPIO BB5 8-bit MCU

Learn More

Datasheet

663In Stock

£1.25

£0.796

£0.707

£0.582

View

Min.: 1
Mult.: 1

4 kB

512 B

SOIC-16

50 MHz

12 bit

12 I/O

1.8 V

5.5 V

SMD/SMT

8 bit

- 40 C

+ 125 C

BB50

Tube

8-bit Microcontrollers - MCU 5 Volt 8051 50 Mhz 8 kB flash 0.5 kB RAM 12 GPIO BB5 8-bit MCU

EFM8BB50F8G-A-SOIC16
Silicon Labs
1: £1.37
1,005In Stock

Mfr. Part No.
EFM8BB50F8G-A-SOIC16

Mouser Part No
634-M8BB50F8GASOIC16

Silicon Labs

8-bit Microcontrollers - MCU 5 Volt 8051 50 Mhz 8 kB flash 0.5 kB RAM 12 GPIO BB5 8-bit MCU

Learn More

Datasheet

1,005In Stock

£1.37

£0.882

£0.78

£0.642

View

Min.: 1
Mult.: 1

8 kB

512 B

SOIC-16

50 MHz

12 bit

12 I/O

1.8 V

5.5 V

SMD/SMT

8 bit

- 40 C

+ 85 C

Tube

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: £1.25
200In 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

Datasheet

200In Stock

£1.25

£0.796

£0.707

£0.582

View

Min.: 1
Mult.: 1

16 kB

512 B

QFN-12

50 MHz

12 bit

9 I/O

1.8 V

5.5 V

SMD/SMT

8 bit

- 40 C

+ 125 C

BB50

Cut Tape

8-bit Microcontrollers - MCU 5 Volt 8051 50 Mhz 16 kB flash 0.5 kB RAM 12 GPIO BB5 8-bit MCU

EFM8BB50F16I-A-QFN16
Silicon Labs
1: £1.28
96In Stock

Mfr. Part No.
EFM8BB50F16I-A-QFN16

Mouser Part No
634-M8BB50F16IAQFN16

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

Datasheet

96In Stock

£1.28

£0.826

£0.598

£0.498

View

Min.: 1
Mult.: 1

16 kB

512 B

QFN-16

50 MHz

12 bit

12 I/O

1.8 V

5.5 V

SMD/SMT

8 bit

- 40 C

+ 125 C

BB50

Cut Tape

8-bit Microcontrollers - MCU 5 Volt 8051 50 Mhz 4 kB flash 0.5 kB RAM 12 GPIO BB5 8-bit MCU

EFM8BB50F4G-A-QFN16
Silicon Labs
1: £1.38
361In Stock

Mfr. Part No.
EFM8BB50F4G-A-QFN16

Mouser Part No
634-M8BB50F4GAQFN16

Silicon Labs

8-bit Microcontrollers - MCU 5 Volt 8051 50 Mhz 4 kB flash 0.5 kB RAM 12 GPIO BB5 8-bit MCU

Learn More

Datasheet

361In Stock

£1.38

£0.841

£0.705

£0.535

View

Min.: 1
Mult.: 1

4 kB

512 B

QFN-16

50 MHz

12 bit

12 I/O

1.8 V

5.5 V

SMD/SMT

8 bit

- 40 C

+ 85 C

BB50

Cut Tape

8-bit Microcontrollers - MCU 5 Volt 8051 50 Mhz 16 kB flash 0.5 kB RAM 12 GPIO BB5 8-bit MCU

EFM8BB50F16G-A-QFN16R
Silicon Labs
1: £1.25
1,000Expected 29/07/2026

Mfr. Part No.
EFM8BB50F16G-A-QFN16R

Mouser Part No
634-M8BB50F16GAFN16R

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

Datasheet

1,000Expected 29/07/2026

Cut Tape

£1.25

£0.796

£0.707

£0.582

View

Reel

£0.342

MouseReel Available

Min.: 1
Mult.: 1

: 3,000

16 kB

512 B

QFN-16

50 MHz

12 bit

12 I/O

1.8 V

5.5 V

SMD/SMT

8 bit

- 40 C

+ 85 C

BB50

Reel, Cut Tape, MouseReel

8-bit Microcontrollers - MCU 5 Volt 8051 50 Mhz 16 kB flash 0.5 kB RAM 9 GPIO BB5 8-bit MCU

EFM8BB50F16G-A-QFN12
Silicon Labs
1: £1.20
1,207On Order

Mfr. Part No.
EFM8BB50F16G-A-QFN12

Mouser Part No
634-M8BB50F16GAQFN12

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

Datasheet

1,207On Order

£1.20

£0.766

£0.558

£0.475

View

Min.: 1
Mult.: 1

16 kB

512 B

QFN-12

50 MHz

12 bit

9 I/O

1.8 V

5.5 V

SMD/SMT

8 bit

- 40 C

+ 85 C

BB50

Cut Tape

8-bit Microcontrollers - MCU 5 Volt 8051 50 Mhz 16 kB flash 0.5 kB RAM 9 GPIO BB5 8-bit MCU

EFM8BB50F16G-A-QFN12R
Silicon Labs
3,000: £0.33
Non-Stocked Lead-Time 12 Weeks

Mfr. Part No.
EFM8BB50F16G-A-QFN12R

Mouser Part No
634-M8BB50F16GAFN12R

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

Datasheet

Non-Stocked Lead-Time 12 Weeks

Reel

£0.33

£0.303

Min.: 3,000
Mult.: 3,000

: 3,000

16 kB

512 B

QFN-12

50 MHz

12 bit

9 I/O

1.8 V

5.5 V

SMD/SMT

8 bit

- 40 C

+ 85 C

BB50

Reel

8-bit Microcontrollers - MCU 5 Volt 8051 50 Mhz 16 kB flash 0.5 kB RAM 12 GPIO BB5 8-bit MCU

EFM8BB50F16G-A-SOIC16R
Silicon Labs
2,500: £0.387
Non-Stocked Lead-Time 12 Weeks

Mfr. Part No.
EFM8BB50F16G-A-SOIC16R

Mouser Part No
634-M8BB50F16GSIC16R

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

Datasheet

Non-Stocked Lead-Time 12 Weeks

Reel

£0.387

£0.375

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

: 2,500

16 kB

512 B

SOIC-16

50 MHz

12 bit

12 I/O

1.8 V

5.5 V

SMD/SMT

8 bit

- 40 C

+ 85 C

BB50

Reel

8-bit Microcontrollers - MCU 5 Volt 8051 50 Mhz 16 kB flash 0.5 kB RAM 9 GPIO BB5 8-bit MCU

EFM8BB50F16I-A-QFN12R
Silicon Labs
1: £1.50
Non-Stocked Lead-Time 12 Weeks

Mfr. Part No.
EFM8BB50F16I-A-QFN12R

Mouser Part No
634-M8BB50F16IAFN12R

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

Datasheet

Non-Stocked Lead-Time 12 Weeks

Cut Tape

£1.50

£0.917

£0.773

£0.587

Reel

£0.342

View

MouseReel Available

Min.: 1
Mult.: 1

: 3,000

16 kB

512 B

QFN-12

50 MHz

12 bit

9 I/O

1.8 V

5.5 V

SMD/SMT

8 bit

- 40 C

+ 125 C

Reel, Cut Tape, MouseReel

8-bit Microcontrollers - MCU 5 Volt 8051 50 Mhz 16 kB flash 0.5 kB RAM 12 GPIO BB5 8-bit MCU

EFM8BB50F16I-A-QFN16R
Silicon Labs
3,000: £0.331
Non-Stocked Lead-Time 12 Weeks

Mfr. Part No.
EFM8BB50F16I-A-QFN16R

Mouser Part No
634-M8BB50F16IAFN16R

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

Datasheet

Non-Stocked Lead-Time 12 Weeks

Reel

£0.331

£0.32

Min.: 3,000
Mult.: 3,000

: 3,000

16 kB

512 B

QFN-16

50 MHz

12 bit

12 I/O

1.8 V

5.5 V

SMD/SMT

8 bit

- 40 C

+ 125 C

Reel

8-bit Microcontrollers - MCU 5 Volt 8051 50 Mhz 16 kB flash 0.5 kB RAM 12 GPIO BB5 8-bit MCU

EFM8BB50F16I-A-SOIC16R
Silicon Labs
2,500: £0.397
Non-Stocked Lead-Time 12 Weeks

Mfr. Part No.
EFM8BB50F16I-A-SOIC16R

Mouser Part No
634-M8BB50F16IAIC16R

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

Datasheet

Non-Stocked Lead-Time 12 Weeks

Reel

£0.397

£0.385

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

: 2,500

16 kB

512 B

SOIC-16

50 MHz

12 bit

12 I/O

1.8 V

5.5 V

SMD/SMT

8 bit

- 40 C

+ 125 C

BB50

Reel

8-bit Microcontrollers - MCU 5 Volt 8051 50 Mhz 4 kB flash 0.5 kB RAM 9 GPIO BB5 8-bit MCU

EFM8BB50F4G-A-QFN12R
Silicon Labs
3,000: £0.26
Non-Stocked Lead-Time 12 Weeks

Mfr. Part No.
EFM8BB50F4G-A-QFN12R

Mouser Part No
634-M8BB50F4GAQFN12R

Silicon Labs

8-bit Microcontrollers - MCU 5 Volt 8051 50 Mhz 4 kB flash 0.5 kB RAM 9 GPIO BB5 8-bit MCU

Learn More

Datasheet

Non-Stocked Lead-Time 12 Weeks

Reel

£0.26

£0.237

Min.: 3,000
Mult.: 3,000

: 3,000

4 kB

512 B

QFN-12

50 MHz

12 bit

9 I/O

1.8 V

5.5 V

SMD/SMT

8 bit

- 40 C

+ 85 C

Reel

8-bit Microcontrollers - MCU 5 Volt 8051 50 Mhz 4 kB flash 0.5 kB RAM 12 GPIO BB5 8-bit MCU

EFM8BB50F4G-A-QFN16R
Silicon Labs
3,000: £0.272
Non-Stocked Lead-Time 12 Weeks

Mfr. Part No.
EFM8BB50F4G-A-QFN16R

Mouser Part No
634-M8BB50F4GAQFN16R

Silicon Labs

8-bit Microcontrollers - MCU 5 Volt 8051 50 Mhz 4 kB flash 0.5 kB RAM 12 GPIO BB5 8-bit MCU

Learn More

Datasheet

Non-Stocked Lead-Time 12 Weeks

Reel

£0.272

£0.249

Min.: 3,000
Mult.: 3,000

: 3,000

4 kB

512 B

QFN-16

50 MHz

12 bit

12 I/O

1.8 V

5.5 V

SMD/SMT

8 bit

- 40 C

+ 85 C

BB50

Reel

8-bit Microcontrollers - MCU 5 Volt 8051 50 Mhz 4 kB flash 0.5 kB RAM 12 GPIO BB5 8-bit MCU

EFM8BB50F4G-A-SOIC16R
Silicon Labs
2,500: £0.33
Non-Stocked Lead-Time 12 Weeks

Mfr. Part No.
EFM8BB50F4G-A-SOIC16R

Mouser Part No
634-M8BB50F4GASIC16R

Silicon Labs

8-bit Microcontrollers - MCU 5 Volt 8051 50 Mhz 4 kB flash 0.5 kB RAM 12 GPIO BB5 8-bit MCU

Learn More

Datasheet

Non-Stocked Lead-Time 12 Weeks

Reel

£0.33

£0.303

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

: 2,500

4 kB

512 B

SOIC-16

50 MHz

12 bit

12 I/O

1.8 V

5.5 V

SMD/SMT

8 bit

- 40 C

+ 85 C

BB50

Reel

8-bit Microcontrollers - MCU 5 Volt 8051 50 Mhz 4 kB flash 0.5 kB RAM 12 GPIO BB5 8-bit MCU

EFM8BB50F4G-A-SOIC16
Silicon Labs
1: £1.46
Non-Stocked Lead-Time 12 Weeks

Mfr. Part No.
EFM8BB50F4G-A-SOIC16

Mouser Part No
634-M8BB50F4GASOIC16

Silicon Labs

8-bit Microcontrollers - MCU 5 Volt 8051 50 Mhz 4 kB flash 0.5 kB RAM 12 GPIO BB5 8-bit MCU

Learn More

Datasheet

Non-Stocked Lead-Time 12 Weeks

£1.46

£0.882

£0.746

£0.566

View

Min.: 1
Mult.: 1

4 kB

512 B

SOIC-16

50 MHz

12 bit

12 I/O

1.8 V

5.5 V

SMD/SMT

8 bit

- 40 C

+ 85 C

Tube

8-bit Microcontrollers - MCU 5 Volt 8051 50 Mhz 4 kB flash 0.5 kB RAM 9 GPIO BB5 8-bit MCU

EFM8BB50F4I-A-QFN12
Silicon Labs
1: £1.20
Non-Stocked Lead-Time 12 Weeks

Mfr. Part No.
EFM8BB50F4I-A-QFN12

Mouser Part No
634-M8BB50F4IAQFN12

Silicon Labs

8-bit Microcontrollers - MCU 5 Volt 8051 50 Mhz 4 kB flash 0.5 kB RAM 9 GPIO BB5 8-bit MCU

Learn More

Datasheet

Non-Stocked Lead-Time 12 Weeks

£1.20

£0.73

£0.614

£0.464

View

Min.: 1
Mult.: 1

4 kB

512 B

QFN-12

50 MHz

12 bit

9 I/O

1.8 V

5.5 V

SMD/SMT

8 bit

- 40 C

+ 125 C

Cut Tape

8-bit Microcontrollers - MCU 5 Volt 8051 50 Mhz 4 kB flash 0.5 kB RAM 9 GPIO BB5 8-bit MCU

EFM8BB50F4I-A-QFN12R
Silicon Labs
3,000: £0.272
Non-Stocked Lead-Time 12 Weeks

Mfr. Part No.
EFM8BB50F4I-A-QFN12R

Mouser Part No
634-M8BB50F4IAQFN12R

Silicon Labs

8-bit Microcontrollers - MCU 5 Volt 8051 50 Mhz 4 kB flash 0.5 kB RAM 9 GPIO BB5 8-bit MCU

Learn More

Datasheet

Non-Stocked Lead-Time 12 Weeks

Reel

£0.272

£0.249

Min.: 3,000
Mult.: 3,000

: 3,000

4 kB

512 B

QFN-12

50 MHz

12 bit

9 I/O

1.8 V

5.5 V

SMD/SMT

8 bit

- 40 C

+ 125 C

BB50

Reel

8-bit Microcontrollers - MCU 5 Volt 8051 50 Mhz 4 kB flash 0.5 kB RAM 12 GPIO BB5 8-bit MCU

EFM8BB50F4I-A-QFN16
Silicon Labs
1: £1.25
Non-Stocked Lead-Time 12 Weeks

Mfr. Part No.
EFM8BB50F4I-A-QFN16

Mouser Part No
634-M8BB50F4IAQFN16

Silicon Labs

8-bit Microcontrollers - MCU 5 Volt 8051 50 Mhz 4 kB flash 0.5 kB RAM 12 GPIO BB5 8-bit MCU

Learn More

Datasheet

Non-Stocked Lead-Time 12 Weeks

£1.25

£0.759

£0.64

£0.485

View

Min.: 1
Mult.: 1

4 kB

512 B

QFN-16

50 MHz

12 bit

12 I/O

1.8 V

5.5 V

SMD/SMT

8 bit

- 40 C

+ 125 C

BB50

Cut Tape

8-bit Microcontrollers - MCU 5 Volt 8051 50 Mhz 4 kB flash 0.5 kB RAM 12 GPIO BB5 8-bit MCU

EFM8BB50F4I-A-QFN16R
Silicon Labs
3,000: £0.283
Non-Stocked Lead-Time 12 Weeks

Mfr. Part No.
EFM8BB50F4I-A-QFN16R

Mouser Part No
634-M8BB50F4IAQFN16R

Silicon Labs

8-bit Microcontrollers - MCU 5 Volt 8051 50 Mhz 4 kB flash 0.5 kB RAM 12 GPIO BB5 8-bit MCU

Learn More

Datasheet

Non-Stocked Lead-Time 12 Weeks

Reel

£0.283

£0.259

Min.: 3,000
Mult.: 3,000

: 3,000

4 kB

512 B

QFN-16

50 MHz

12 bit

12 I/O

1.8 V

5.5 V

SMD/SMT

8 bit

- 40 C

+ 125 C

Reel

EFM8BB50 Busy Bee 8-Bit MCUs

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