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8051 microcontroller Embedded Processors & Controllers

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Part #

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: Rp74.852
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

Datasheet

980In Stock

Cut Tape

Rp74.852

Rp49.534

Rp45.131

Rp38.343

Reel

Rp29.170

View

MouseReel Available

Min.: 1
Mult.: 1

: 1.500

8-bit Microcontrollers - MCU

SMD/SMT

QFN-24

CIP-51 8051

8 bit

72 MHz

32 kB

2.25 kB

10 bit/12 bit/14 bit

20 I/O

- 40 C

+ 105 C

Reel, Cut Tape, MouseReel

8-bit Microcontrollers - MCU 16K Flash 50MHz 8051 1.71V to 5.5V

CY8C3244AXI-153
Infineon Technologies
1: Rp206.943
33In Stock

Mfr. Part No.
CY8C3244AXI-153

Mouser Part No
727-CY8C3244AXI-153

Infineon Technologies

8-bit Microcontrollers - MCU 16K Flash 50MHz 8051 1.71V to 5.5V

Learn More

Datasheet

33In Stock

Rp206.943

Rp161.078

Rp146.218

Rp117.598

View

Min.: 1
Mult.: 1

8-bit Microcontrollers - MCU

SMD/SMT

TQFP-100

8051

8 bit

50 MHz

16 kB

2 kB

12 bit

70 I/O

- 40 C

+ 85 C

Tray

8-bit Microcontrollers - MCU 2K FLASH 24MHZ SOIC

AT89S2051-24SU
Microchip Technology
1: Rp47.883
504In Stock

Mfr. Part No.
AT89S2051-24SU

Mouser Part No
556-A89S2051-24SU

Microchip Technology

8-bit Microcontrollers - MCU 2K FLASH 24MHZ SOIC

Datasheet

504In Stock

Rp47.883

Min.: 1
Mult.: 1

8-bit Microcontrollers - MCU

SMD/SMT

SOIC-20

8051

8 bit

24 MHz

2 kB

256 B

No ADC

15 I/O

- 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-QFN32
Silicon Labs
1: Rp79.805
1.599In 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

Datasheet

1.599In Stock

Rp79.805

Rp52.836

Rp48.067

Rp40.912

View

Min.: 1
Mult.: 1

8-bit Microcontrollers - MCU

SMD/SMT

QFN-32

CIP-51 8051

8 bit

50 MHz

64 kB

4.35 kB

10 bit, 12 bit

29 I/O

- 40 C

+ 125 C

Tray

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: Rp61.092
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

Datasheet

1.520In Stock

Cut Tape

Rp61.092

Rp40.178

Rp37.059

Rp32.289

Reel

Rp24.951

View

Min.: 1
Mult.: 1

: 1.500

8-bit Microcontrollers - MCU

SMD/SMT

QFN-24

CIP-51 8051

8 bit

50 MHz

32 kB

2.3 kB

10 bit, 12 bit

20 I/O

- 40 C

+ 125 C

Reel, Cut Tape

8-bit Microcontrollers - MCU 8051 4K FLASH 2.7 TO 5.5V 24MHZ 4V-5.5V

AT89C4051-24SU
Microchip Technology
1: Rp27.336
695In Stock

Mfr. Part No.
AT89C4051-24SU

Mouser Part No
556-A89C4051-24SU

Microchip Technology

8-bit Microcontrollers - MCU 8051 4K FLASH 2.7 TO 5.5V 24MHZ 4V-5.5V

Datasheet

695In Stock

Rp27.336

Rp27.152

Rp25.317

Quote

Min.: 1
Mult.: 1

8-bit Microcontrollers - MCU

SMD/SMT

SOIC-20

8051

8 bit

24 MHz

4 kB

128 B

No ADC

15 I/O

- 40 C

+ 85 C

Tube

8-bit Microcontrollers - MCU 8051 25 MHz 16 kB flash 2 kB RAM 8-bit Universal Bee MCU

EFM8UB10F16G-C-QFN28R
Silicon Labs
1: Rp49.718
4.493In Stock

Mfr. Part No.
EFM8UB10F16G-C-QFN28R

Mouser Part No
634-8UB10F16GCQFN28R

Silicon Labs

8-bit Microcontrollers - MCU 8051 25 MHz 16 kB flash 2 kB RAM 8-bit Universal Bee MCU

Datasheet

4.493In Stock

Cut Tape

Rp49.718

Rp41.829

Rp38.710

Rp34.674

View

Reel

Rp28.620

Min.: 1
Mult.: 1

: 1.500

8-bit Microcontrollers - MCU

SMD/SMT

QFN-28

CIP-51 8051

8 bit

50 MHz

16 kB

2.25 kB

12 bit

22 I/O

- 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-QFN24R
Silicon Labs
1: Rp67.330
2.270In 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

Datasheet

2.270In Stock

Cut Tape

Rp67.330

Rp45.498

Rp42.196

Rp36.692

Reel

Rp28.436

View

MouseReel Available

Min.: 1
Mult.: 1

: 1.500

8-bit Microcontrollers - MCU

SMD/SMT

QFN-24

CIP-51 8051

8 bit

50 MHz

64 kB

4.35 kB

10 bit, 12 bit

20 I/O

- 40 C

+ 85 C

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: Rp34.124
4.177In 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

Datasheet

4.177In Stock

Cut Tape

Rp34.124

Rp28.253

Rp25.868

Rp22.933

Reel

Rp17.025

View

MouseReel Available

Min.: 1
Mult.: 1

: 2.500

8-bit Microcontrollers - MCU

SMD/SMT

QFN-32

CIP-51 8051

8 bit

50 MHz

16 kB

2.3 kB

10 bit, 12 bit

29 I/O

- 40 C

+ 85 C

Reel, Cut Tape, MouseReel

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

EFM8UB10F8G-C-QFN20
Silicon Labs
1: Rp32.656
2.547In Stock
5.040Expected 11/09/2026

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 11/09/2026

Rp32.656

Rp27.702

Rp25.684

Rp22.566

View

Min.: 1
Mult.: 1

8-bit Microcontrollers - MCU

SMD/SMT

QFN-20

CIP-51 8051

8 bit

50 MHz

8 kB

2.25 kB

12 bit

13 I/O

- 40 C

+ 85 C

Tube

8-bit Microcontrollers - MCU 8051 25 MHz 16 kB flash 2 kB RAM 8-bit Universal Bee MCU

EFM8UB10F16G-C-QFN20R
Silicon Labs
1: Rp56.689
1.394In Stock
49.500On Order

Mfr. Part No.
EFM8UB10F16G-C-QFN20R

Mouser Part No
634-8UB10F16GCQFN20R

Silicon Labs

8-bit Microcontrollers - MCU 8051 25 MHz 16 kB flash 2 kB RAM 8-bit Universal Bee MCU

Datasheet

1.394In Stock

49.500On Order

Cut Tape

Rp56.689

Rp41.279

Rp37.242

Rp33.573

View

Reel

Rp27.702

MouseReel Available

Min.: 1
Mult.: 1

: 1.500

8-bit Microcontrollers - MCU

SMD/SMT

QFN-20

CIP-51 8051

8 bit

50 MHz

16 kB

2.25 kB

12 bit

13 I/O

- 40 C

+ 85 C

Reel, Cut Tape, MouseReel

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

EFM8BB22F16G-C-QFN28R
Silicon Labs
1: Rp46.232
2.666In Stock

Mfr. Part No.
EFM8BB22F16G-C-QFN28R

Mouser Part No
634-8BB22F16GCQFN28R

Silicon Labs

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

Learn More

Datasheet

2.666In Stock

Cut Tape

Rp46.232

Rp35.775

Rp32.472

Rp27.519

Reel

Rp22.933

View

MouseReel Available

Min.: 1
Mult.: 1

: 1.500

8-bit Microcontrollers - MCU

SMD/SMT

QFN-28

CIP-51 8051

8 bit

50 MHz

16 kB

2.3 kB

12 bit

22 I/O

- 40 C

+ 85 C

Reel, Cut Tape, MouseReel

8-bit Microcontrollers - MCU 8051 75 MHz 64 kB flash 4.25 kB RAM 8-bit Laser Bee MCU

EFM8LB12F64E-C-QFN32
Silicon Labs
1: Rp60.358
2.603In Stock

Mfr. Part No.
EFM8LB12F64E-C-QFN32

Mouser Part No
634-LB12F64ECQFN32

Silicon Labs

8-bit Microcontrollers - MCU 8051 75 MHz 64 kB flash 4.25 kB RAM 8-bit Laser Bee MCU

Learn More

Datasheet

2.603In Stock

Rp60.358

Rp50.452

Rp46.782

Rp42.012

View

Min.: 1
Mult.: 1

8-bit Microcontrollers - MCU

SMD/SMT

QFN-32

CIP-51 8051

8 bit

72 MHz

64 kB

4.25 kB

10 bit/12 bit/14 bit

29 I/O

- 40 C

+ 105 C

Tray

8-bit Microcontrollers - MCU 32K Flash 50MHz 8051 1.71V to 5.5V

CY8C3445PVI-094
Infineon Technologies
1: Rp218.134
134In Stock

Mfr. Part No.
CY8C3445PVI-094

Mouser Part No
727-CY8C3445PVI-094

Infineon Technologies

8-bit Microcontrollers - MCU 32K Flash 50MHz 8051 1.71V to 5.5V

Learn More

Datasheet

134In Stock

Rp218.134

Rp170.985

Rp157.225

Rp154.473

View

Min.: 1
Mult.: 1

8-bit Microcontrollers - MCU

SMD/SMT

SSOP-48

8051

8 bit

50 MHz

32 kB

4 kB

12 bit

29 I/O

- 40 C

+ 85 C

Tube

8-bit Microcontrollers - MCU 8051 75 MHz 64 kB flash 4.25 kB RAM 8-bit Laser Bee MCU

EFM8LB12F64E-C-QFN24R
Silicon Labs
1: Rp63.477
4.091In Stock

Mfr. Part No.
EFM8LB12F64E-C-QFN24R

Mouser Part No
634-LB12F64ECQFN24R

Silicon Labs

8-bit Microcontrollers - MCU 8051 75 MHz 64 kB flash 4.25 kB RAM 8-bit Laser Bee MCU

Learn More

Datasheet

4.091In Stock

Cut Tape

Rp63.477

Rp51.919

Rp47.883

Rp42.563

Reel

Rp32.839

View

Min.: 1
Mult.: 1

: 1.500

8-bit Microcontrollers - MCU

SMD/SMT

QFN-24

CIP-51 8051

8 bit

72 MHz

64 kB

4.25 kB

10 bit/12 bit/14 bit

20 I/O

- 40 C

+ 105 C

Reel, Cut Tape

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

EFM8SB10F4G-A-QFN20
Silicon Labs
1: Rp43.297
22In Stock

Mfr. Part No.
EFM8SB10F4G-A-QFN20

Mouser Part No
634-8SB10F4GAQF20

Silicon Labs

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

Learn More

Datasheet

22In Stock

Rp43.297

Rp27.152

Rp24.767

Rp19.997

View

Min.: 1
Mult.: 1

8-bit Microcontrollers - MCU

SMD/SMT

QFN-20

CIP-51 8051

8 bit

25 MHz

4 kB

512 B

12 bit

16 I/O

- 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: Rp73.934
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

Datasheet

995In Stock

1.500Expected 30/11/2026

Cut Tape

Rp73.934

Rp48.984

Rp44.581

Rp37.793

Reel

Rp27.886

View

MouseReel Available

Min.: 1
Mult.: 1

: 1.500

8-bit Microcontrollers - MCU

SMD/SMT

QFN-24

CIP-51 8051

8 bit

50 MHz

64 kB

4.35 kB

10 bit, 12 bit

20 I/O

- 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

EFM8BB31F64G-D-QFN24
Silicon Labs
1: Rp46.415
6.187In 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

Datasheet

6.187In Stock

Rp46.415

Rp39.077

Rp34.124

Rp31.922

View

Min.: 1
Mult.: 1

8-bit Microcontrollers - MCU

SMD/SMT

QFN-24

CIP-51 8051

8 bit

50 MHz

64 kB

4.35 kB

10 bit, 12 bit

20 I/O

- 40 C

+ 85 C

Tube

8-bit Microcontrollers - MCU 8051 48 MHz 64 kB flash 4 kB RAM 8-bit Universal Bee MCU

EFM8UB20F64G-B-QFN32
Silicon Labs
1: Rp66.963
325In Stock

Mfr. Part No.
EFM8UB20F64G-B-QFN32

Mouser Part No
634-EFM8UBF64GBQFN32

Silicon Labs

8-bit Microcontrollers - MCU 8051 48 MHz 64 kB flash 4 kB RAM 8-bit Universal Bee MCU

Datasheet

325In Stock

Rp66.963

Rp55.955

Rp47.700

Rp45.315

View

Min.: 1
Mult.: 1

8-bit Microcontrollers - MCU

SMD/SMT

QFN-32

CIP-51 8051

8 bit

48 MHz

64 kB

4.25 kB

10 bit

25 I/O

- 40 C

+ 85 C

Tube

8-bit Microcontrollers - MCU 8051 75 MHz 64 kB flash 4.25 kB RAM 8-bit Laser Bee MCU

EFM8LB12F64E-C-QFN32R
Silicon Labs
1: Rp65.679
4.062In Stock

Mfr. Part No.
EFM8LB12F64E-C-QFN32R

Mouser Part No
634-LB12F64ECQFN32R

Silicon Labs

8-bit Microcontrollers - MCU 8051 75 MHz 64 kB flash 4.25 kB RAM 8-bit Laser Bee MCU

Learn More

Datasheet

4.062In Stock

Cut Tape

Rp65.679

Rp53.754

Rp46.599

Rp44.030

Reel

Rp33.573

View

Min.: 1
Mult.: 1

: 2.500

8-bit Microcontrollers - MCU

SMD/SMT

QFN-32

CIP-51 8051

8 bit

72 MHz

64 kB

4.25 kB

10 bit/12 bit/14 bit

29 I/O

- 40 C

+ 105 C

Reel, Cut Tape

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

EFM8SB10F8G-A-QSOP24
Silicon Labs
1: Rp32.289
152In Stock
End of Life

Mfr. Part No.
EFM8SB10F8G-A-QSOP24

Mouser Part No
634-8SB10F8GAQS24

End of Life

Silicon Labs

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

Learn More

Datasheet

152In Stock

Rp32.289

Rp27.336

Rp23.666

Rp22.382

View

Min.: 1
Mult.: 1

8-bit Microcontrollers - MCU

SMD/SMT

QSOP-24

CIP-51 8051

8 bit

25 MHz

8 kB

512 B

12 bit

17 I/O

- 40 C

+ 85 C

Tube

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

EFM8BB52F32G-C-QFN20
Silicon Labs
1: Rp33.573
2.189In Stock

Mfr. Part No.
EFM8BB52F32G-C-QFN20

Mouser Part No
634-EFM852F32GCQFN20

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

2.189In Stock

Rp33.573

Rp21.465

Rp19.080

Rp15.686

View

Min.: 1
Mult.: 1

8-bit Microcontrollers - MCU

SMD/SMT

QFN-20

16 kB

1.28 kB

16 I/O

- 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-TSSOP28
Silicon Labs
1: Rp25.684
86In Stock

Mfr. Part No.
EFM8BB52F32I-C-TSSOP28

Mouser Part No
634-EFM852F32ICTOP28

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

86In Stock

Rp25.684

Rp21.832

Rp19.263

Rp18.052

View

Min.: 1
Mult.: 1

8-bit Microcontrollers - MCU

SMD/SMT

TSSOP-28

16 kB

1.28 kB

16 I/O

- 40 C

+ 85 C

Cut Tape

8-bit Microcontrollers - MCU 8051 25 MHz 16 kB flash 4 kB RAM 8-bit Sleepy Bee MCU

EFM8SB20F16G-B-QFN24
Silicon Labs
1: Rp37.059
364In Stock

Mfr. Part No.
EFM8SB20F16G-B-QFN24

Mouser Part No
634-EFM8SBF16GBQFN24

Silicon Labs

8-bit Microcontrollers - MCU 8051 25 MHz 16 kB flash 4 kB RAM 8-bit Sleepy Bee MCU

Learn More

Datasheet

364In Stock

Rp37.059

Rp31.372

Rp26.235

Rp24.767

View

Min.: 1
Mult.: 1

8-bit Microcontrollers - MCU

SMD/SMT

QFN-24

CIP-51 8051

8 bit

25 MHz

16 kB

4.25 kB

10 bit

16 I/O

- 40 C

+ 85 C

Tube

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

EFM8BB51F16G-C-QFN20R
Silicon Labs
1: Rp27.336
1.060In Stock
7.500Expected 04/01/2027

Mfr. Part No.
EFM8BB51F16G-C-QFN20R

Mouser Part No
634-EFM851F16GQFN20R

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

1.060In Stock

7.500Expected 04/01/2027

Cut Tape

Rp27.336

Rp17.410

Rp15.539

Rp12.787

Reel

Rp8.861

View

Min.: 1
Mult.: 1

: 2.500

8-bit Microcontrollers - MCU

SMD/SMT

QFN-20

16 kB

1.28 kB

16 I/O

- 40 C

+ 85 C

Reel, Cut Tape

8051 microcontroller Embedded Processors & Controllers

Types of Embedded Processors & Controllers

Customer Service Office

Company

Resources

Support

CSP-16
DFN-10
LQFP-32
LQFP-80
PDIP-14
PDIP-20
PDIP-40
PLCC-44
PQFP-48
QFN-11
QFN-12
QFN-16
QFN-20
QFN-24
QFN-28
QFN-32
QFN-36
QFN-40
QFN-48
QFN-68

128 B
256 B
512 B
768 B
1 kB
1.25 kB
1.28 kB
1.54 kB
2 kB
2.25 kB
2.3 kB
2.31 kB
3.25 kB
4 kB
4.25 kB
4.35 kB
8 kB
8.25 kB
16 kB
32 kB

6 I/O
8 I/O
9 I/O
11 I/O
12 I/O
13 I/O
15 I/O
16 I/O
17 I/O
18 I/O
19 I/O
20 I/O
21 I/O
22 I/O
24 I/O
25 I/O
28 I/O
29 I/O
31 I/O
32 I/O