8-bit Microcontrollers - MCU

.hide-partial { max-height: none; } .show-more { display: none; }

EFM8BB51 & EFM8BB52 Busy Bee 8-Bit MCUs

Silicon Labs EFM8BB51 and EFM8BB52 Busy Bee MCUs are multi-purpose microcontrollers with a comprehensive feature set in compact packages. These devices offer high value by integrating advanced analog and communication peripherals into a small footprint, making them ideal for space-constrained applications. With an efficient 8051 core, 5V capable I/O, precision analog, and enhanced pulse-width modulation, the EFM8BB51 and EFM8BB52 MCUs are optimal for embedded applications.

.catnav-wrapper { height: auto; overflow: visible; } .catalog-nav-tabs ul { white-space: normal; }

Results: 49

Applied Filters:

Core

Program Memory Size

Data RAM Size

Package / Case

Maximum Clock Frequency

ADC Resolution

Number of I/Os

Data Bus Width

Maximum Operating Temperature

Packaging

Reset All

Search within results

In Stock

Normally Stocked

Active

New Products

RoHS Compliant

.search-refine-wrapper { display: inline-block; min-width: 100%; } .scroll-body { overflow-x: visible; } .search-table-wrapper { overflow: visible; } .hide-partial { max-height: none; } .show-more { display: none; }

Part #

8-bit Microcontrollers - MCU 5 Volt 8051 50 Mhz 16 kB flash 1.28 kB RAM 29 GPIO BB5 8-bit MCU

EFM8BB52F16I-C-QFN32
Silicon Labs
1: $2.39
3,400On Order

Mfr. Part #
EFM8BB52F16I-C-QFN32

Mouser Part #
634-EFMB52F16ICQFN32

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

Datasheet

3,400On Order

$2.39

$1.53

$1.36

$1.12

View

Min.: 1
Mult.: 1

16 kB

1.28 kB

QFN-32

16 I/O

1.8 V

5.5 V

SMD/SMT

- 40 C

+ 85 C

Cut Tape

8-bit Microcontrollers - MCU 5 Volt 8051 50 Mhz 16 kB flash 1.28 kB RAM 16 GPIO BB5 8-bit MCU

EFM8BB51F16I-C-TSSOP20R
Silicon Labs
2,500: $0.808
Non-Stocked Lead-Time 24 Weeks

Mfr. Part #
EFM8BB51F16I-C-TSSOP20R

Mouser Part #
634-EFM851F16TSOP20R

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

Datasheet

Non-Stocked Lead-Time 24 Weeks

Reel

$0.808

$0.795

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

: 2,500

16 kB

1.28 kB

TSSOP-20

16 I/O

1.8 V

5.5 V

SMD/SMT

- 40 C

+ 85 C

Reel

8-bit Microcontrollers - MCU 5 Volt 8051 50 Mhz 8 kB flash 1.28 kB RAM 16 GPIO BB5 8-bit MCU

EFM8BB51F8G-C-TSSOP20R
Silicon Labs
2,500: $0.716
Non-Stocked Lead-Time 24 Weeks

Mfr. Part #
EFM8BB51F8G-C-TSSOP20R

Mouser Part #
634-EFM851F8GCTOP20R

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

Datasheet

Non-Stocked Lead-Time 24 Weeks

Reel

$0.716

$0.704

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

: 2,500

16 kB

1.28 kB

TSSOP-20

16 I/O

1.8 V

5.5 V

SMD/SMT

- 40 C

+ 85 C

Reel

8-bit Microcontrollers - MCU 5 Volt 8051 50 Mhz 8 kB flash 1.28 kB RAM 16 GPIO BB5 8-bit MCU

EFM8BB51F8I-C-QFN20R
Silicon Labs
1: $2.13
Non-Stocked Lead-Time 24 Weeks

Mfr. Part #
EFM8BB51F8I-C-QFN20R

Mouser Part #
634-EFM851F8ICQFN20R

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

Datasheet

Non-Stocked Lead-Time 24 Weeks

Cut Tape

$2.13

$1.37

$1.22

$1.00

Reel

$0.693

View

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 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: $0.737
Non-Stocked Lead-Time 24 Weeks

Mfr. Part #
EFM8BB51F8I-C-TSSOP20R

Mouser Part #
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

Datasheet

Non-Stocked Lead-Time 24 Weeks

Reel

$0.737

$0.727

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

: 2,500

16 kB

1.28 kB

TSSOP-20

16 I/O

1.8 V

5.5 V

SMD/SMT

- 40 C

+ 85 C

Reel

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: $2.35
Non-Stocked Lead-Time 24 Weeks

Mfr. Part #
EFM8BB51F16G-C-TSSOP20R

Mouser Part #
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

Datasheet

Non-Stocked Lead-Time 24 Weeks

Cut Tape

$2.35

$1.50

$1.34

$1.10

Reel

$0.762

View

Min.: 1
Mult.: 1

: 2,500

16 kB

1.28 kB

TSSOP-20

16 I/O

1.8 V

5.5 V

SMD/SMT

- 40 C

+ 85 C

Reel, Cut Tape

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: $2.69
Non-Stocked Lead-Time 24 Weeks

Mfr. Part #
EFM8BB52F16G-C-QFN32R

Mouser Part #
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

Datasheet

Non-Stocked Lead-Time 24 Weeks

Cut Tape

$2.69

$1.64

$1.38

$1.05

Reel

$0.645

View

Min.: 1
Mult.: 1

: 2,500

16 kB

1.28 kB

QFN-32

29 I/O

1.8 V

5.5 V

SMD/SMT

- 40 C

+ 85 C

Reel, Cut Tape

8-bit Microcontrollers - MCU 5 Volt 8051 50 Mhz 16 kB flash 1.28 kB RAM 16 GPIO BB5 8-bit MCU

EFM8BB52F16G-C-TSSOP20R
Silicon Labs
2,500: $0.737
Non-Stocked Lead-Time 24 Weeks

Mfr. Part #
EFM8BB52F16G-C-TSSOP20R

Mouser Part #
634-EFM852F16GTOP20R

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

Datasheet

Non-Stocked Lead-Time 24 Weeks

Reel

$0.737

$0.727

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

: 2,500

16 kB

1.28 kB

TSSOP-20

16 I/O

1.8 V

5.5 V

SMD/SMT

- 40 C

+ 85 C

Reel

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: $0.808
Non-Stocked Lead-Time 24 Weeks

Mfr. Part #
EFM8BB52F16G-C-TSSOP28R

Mouser Part #
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

Datasheet

Non-Stocked Lead-Time 24 Weeks

Reel

$0.808

$0.795

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

: 2,500

16 kB

1.28 kB

TSSOP-28

16 I/O

1.8 V

5.5 V

SMD/SMT

- 40 C

+ 85 C

Reel

8-bit Microcontrollers - MCU 5 Volt 8051 50 Mhz 16 kB flash 1.28 kB RAM 16 GPIO BB5 8-bit MCU

EFM8BB52F16I-C-QFN20
Silicon Labs
1: $2.69
Non-Stocked Lead-Time 24 Weeks

Mfr. Part #
EFM8BB52F16I-C-QFN20

Mouser Part #
634-EFM852F16ICQFN20

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

Datasheet

Non-Stocked Lead-Time 24 Weeks

$2.69

$1.64

$1.38

$1.05

View

Min.: 1
Mult.: 1

16 kB

1.28 kB

QFN-20

16 I/O

1.8 V

5.5 V

SMD/SMT

- 40 C

+ 85 C

Cut Tape

8-bit Microcontrollers - MCU 5 Volt 8051 50 Mhz 16 kB flash 1.28 kB RAM 16 GPIO BB5 8-bit MCU

EFM8BB52F16I-C-QFN20R
Silicon Labs
2,500: $0.629
Non-Stocked Lead-Time 24 Weeks

Mfr. Part #
EFM8BB52F16I-C-QFN20R

Mouser Part #
634-EFM852F16IQFN20R

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

Datasheet

Non-Stocked Lead-Time 24 Weeks

Reel

$0.629

$0.575

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

: 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

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: $0.762
Non-Stocked Lead-Time 24 Weeks

Mfr. Part #
EFM8BB52F16I-C-TSSOP20R

Mouser Part #
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

Datasheet

Non-Stocked Lead-Time 24 Weeks

Reel

$0.762

$0.749

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

: 2,500

16 kB

1.28 kB

TSSOP-20

16 I/O

1.8 V

5.5 V

SMD/SMT

- 40 C

+ 85 C

Reel

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: $2.35
Non-Stocked Lead-Time 24 Weeks

Mfr. Part #
EFM8BB52F16I-C-TSSOP20

Mouser Part #
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

Datasheet

Non-Stocked Lead-Time 24 Weeks

$2.35

$1.50

$1.34

$1.10

View

Min.: 1
Mult.: 1

16 kB

1.28 kB

TSSOP-20

16 I/O

1.8 V

5.5 V

SMD/SMT

- 40 C

+ 85 C

Cut Tape

8-bit Microcontrollers - MCU 5 Volt 8051 50 Mhz 16 kB flash 1.28 kB RAM 25 GPIO BB5 8-bit MCU

EFM8BB52F16I-C-TSSOP28
Silicon Labs
1: $2.49
Non-Stocked Lead-Time 24 Weeks

Mfr. Part #
EFM8BB52F16I-C-TSSOP28

Mouser Part #
634-EFM852F16ITSOP28

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

Datasheet

Non-Stocked Lead-Time 24 Weeks

$2.49

$1.58

$1.42

$1.17

View

Min.: 1
Mult.: 1

16 kB

1.28 kB

TSSOP-28

16 I/O

1.8 V

5.5 V

SMD/SMT

- 40 C

+ 85 C

Cut Tape

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: $1.97
Non-Stocked Lead-Time 24 Weeks

Mfr. Part #
EFM8BB52F32G-C-TSSOP28

Mouser Part #
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

Datasheet

Non-Stocked Lead-Time 24 Weeks

$1.97

$1.67

$1.47

$1.36

View

Min.: 1
Mult.: 1

16 kB

1.28 kB

TSSOP-28

16 I/O

1.8 V

5.5 V

SMD/SMT

- 40 C

+ 85 C

Cut Tape

8-bit Microcontrollers - MCU 5 Volt 8051 50 Mhz 32 kB flash 2.304 kB RAM 16 GPIO BB5 8-bit MCU

EFM8BB52F32G-C-QFN20R
Silicon Labs
1: $1.60
Non-Stocked Lead-Time 24 Weeks

Mfr. Part #
EFM8BB52F32G-C-QFN20R

Mouser Part #
634-EFM852F32GQFN20R

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

Datasheet

Non-Stocked Lead-Time 24 Weeks

Cut Tape

$1.60

$1.36

$1.27

$1.10

Reel

$0.775

View

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 5 Volt 8051 50 Mhz 32 kB flash 2.304 kB RAM 29 GPIO BB5 8-bit MCU

EFM8BB52F32G-C-QFN32R
Silicon Labs
1: $1.64
Non-Stocked Lead-Time 24 Weeks

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

Datasheet

Non-Stocked Lead-Time 24 Weeks

Cut Tape

$1.64

$1.40

$1.23

$1.09

Reel

$0.775

View

Min.: 1
Mult.: 1

: 2,500

16 kB

1.28 kB

QFN-32

16 I/O

1.8 V

5.5 V

SMD/SMT

- 40 C

+ 85 C

Reel, Cut Tape

8-bit Microcontrollers - MCU 5 Volt 8051 50 Mhz 32 kB flash 2.304 kB RAM 16 GPIO BB5 8-bit MCU

EFM8BB52F32G-C-TSSOP20R
Silicon Labs
2,500: $0.90
Non-Stocked Lead-Time 24 Weeks

Mfr. Part #
EFM8BB52F32G-C-TSSOP20R

Mouser Part #
634-EFM852F32GTOP20R

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

Datasheet

Non-Stocked Lead-Time 24 Weeks

Reel

$0.90

$0.886

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

: 2,500

16 kB

1.28 kB

TSSOP-20

16 I/O

1.8 V

5.5 V

SMD/SMT

- 40 C

+ 85 C

Reel

8-bit Microcontrollers - MCU 5 Volt 8051 50 Mhz 32 kB flash 2.304 kB RAM 25 GPIO BB5 8-bit MCU

EFM8BB52F32G-C-TSSOP28R
Silicon Labs
2,500: $0.923
Non-Stocked Lead-Time 24 Weeks

Mfr. Part #
EFM8BB52F32G-C-TSSOP28R

Mouser Part #
634-EFM852F32GTOP28R

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

Datasheet

Non-Stocked Lead-Time 24 Weeks

Reel

$0.923

$0.906

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

: 2,500

16 kB

1.28 kB

TSSOP-28

16 I/O

1.8 V

5.5 V

SMD/SMT

- 40 C

+ 85 C

Reel

8-bit Microcontrollers - MCU 5 Volt 8051 50 Mhz 32 kB flash 2.304 kB RAM 16 GPIO BB5 8-bit MCU

EFM8BB52F32I-C-QFN20
Silicon Labs
1: $1.64
Non-Stocked Lead-Time 24 Weeks

Mfr. Part #
EFM8BB52F32I-C-QFN20

Mouser Part #
634-EFM852F32ICQFN20

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

Datasheet

Non-Stocked Lead-Time 24 Weeks

$1.64

$1.40

$1.30

$1.14

View

Min.: 1
Mult.: 1

32 kB

2.3 kB

QFN-20

16 I/O

1.8 V

5.5 V

SMD/SMT

- 40 C

+ 125 C

Cut Tape

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: $0.923
Non-Stocked Lead-Time 24 Weeks

Mfr. Part #
EFM8BB52F32I-C-TSSOP20R

Mouser Part #
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

Datasheet

Non-Stocked Lead-Time 24 Weeks

Reel

$0.923

$0.906

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

: 2,500

16 kB

1.28 kB

TSSOP-20

16 I/O

1.8 V

5.5 V

SMD/SMT

- 40 C

+ 85 C

Reel

8-bit Microcontrollers - MCU 5 Volt 8051 50 Mhz 8 kB flash 1.28 kB RAM 16 GPIO BB5 8-bit MCU

EFM8BB51F8I-C-QFN20
Silicon Labs
1: $2.13
Non-Stocked Lead-Time 24 Weeks

Mfr. Part #
EFM8BB51F8I-C-QFN20

Mouser Part #
634-EFM8B51F8ICQFN20

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

Datasheet

Non-Stocked Lead-Time 24 Weeks

$2.13

$1.37

$1.22

$1.00

View

Min.: 1
Mult.: 1

16 kB

1.28 kB

QFN-20

16 I/O

1.8 V

5.5 V

SMD/SMT

- 40 C

+ 85 C

Cut Tape

8-bit Microcontrollers - MCU 5 Volt 8051 50 Mhz 32 kB flash 2.304 kB RAM 25 GPIO BB5 8-bit MCU

EFM8BB52F32I-C-TSSOP28R
Silicon Labs
2,500: $0.946
Non-Stocked Lead-Time 24 Weeks

Mfr. Part #
EFM8BB52F32I-C-TSSOP28R

Mouser Part #
634-EFMB52F32ITOP28R

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

Datasheet

Non-Stocked Lead-Time 24 Weeks

Reel

$0.946

$0.927

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

: 2,500

16 kB

1.28 kB

TSSOP-28

16 I/O

1.8 V

5.5 V

SMD/SMT

- 40 C

+ 85 C

Reel

8-bit Microcontrollers - MCU

EFM8BB52F32G-A-QFN32
Silicon Labs
1: $2.49
Non-Stocked

Mfr. Part #
EFM8BB52F32G-A-QFN32

Mouser Part #
634-EFM8B52F32GAFN32

Silicon Labs

8-bit Microcontrollers - MCU

Learn More

Datasheet

Non-Stocked

$2.49

$1.58

$1.42

$1.17

View

Min.: 1
Mult.: 1

8051

32 kB

2.25 kB

QFN-32

50 MHz

12 bit

29 I/O

1.8 V

5.5 V

SMD/SMT

8 bit

- 40 C

+ 85 C

EFM8BB51 & EFM8BB52 Busy Bee 8-Bit MCUs

Mouser®

Company

Resources

Support