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8051 microcontroller Embedded Processors & Controllers

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Part #

8-bit Microcontrollers - MCU 64K Flash 50MHz 8051 1.71V to 5.5V

CY8C3246PVI-147
Infineon Technologies
1: Rp219.969
371In Stock

Mfr. Part No.
CY8C3246PVI-147

Mouser Part No
727-CY8C3246PVI-147

Infineon Technologies

8-bit Microcontrollers - MCU 64K Flash 50MHz 8051 1.71V to 5.5V

Learn More

Datasheet

371In Stock

Rp219.969

Rp207.310

Rp151.538

Rp145.851

View

Min.: 1
Mult.: 1

8-bit Microcontrollers - MCU

SMD/SMT

SSOP-48

8051

8 bit

50 MHz

64 kB

8 kB

12 bit

31 I/O

- 40 C

+ 85 C

Tube

8-bit Microcontrollers - MCU 64K Flash 67MHz 8051 0.5V to 5.5V

CY8C3866AXI-040
Infineon Technologies
1: Rp505.983
307In Stock

Mfr. Part No.
CY8C3866AXI-040

Mouser Part No
727-CY8C3866AXI-040

Infineon Technologies

8-bit Microcontrollers - MCU 64K Flash 67MHz 8051 0.5V to 5.5V

Learn More

Datasheet

307In Stock

Rp505.983

Rp401.410

Rp378.111

Rp341.603

View

Min.: 1
Mult.: 1

8-bit Microcontrollers - MCU

SMD/SMT

TQFP-100

8051

8 bit

67 MHz

64 kB

8 kB

20 bit

72 I/O

- 40 C

+ 85 C

Tray

8-bit Microcontrollers - MCU Single Cycle 8051 4K ISP FL

AT89LP51-20AU
Microchip Technology
1: Rp31.555
130In Stock
480Expected 28/09/2026

Mfr. Part No.
AT89LP51-20AU

Mouser Part No
556-AT89LP51-20AU

Microchip Technology

8-bit Microcontrollers - MCU Single Cycle 8051 4K ISP FL

Learn More

Datasheet

130In Stock

480Expected 28/09/2026

Rp31.555

Min.: 1
Mult.: 1

8-bit Microcontrollers - MCU

SMD/SMT

TQFP-44

8051

8 bit

20 MHz

4 kB

256 B

No ADC

36 I/O

- 40 C

+ 85 C

Tray

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

AT89C4051-24PU
Microchip Technology
1: Rp38.894
1.088In Stock

Mfr. Part No.
AT89C4051-24PU

Mouser Part No
556-A89C4051-24PU

Microchip Technology

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

Datasheet

1.088In Stock

Rp38.894

Rp32.289

Min.: 1
Mult.: 1

8-bit Microcontrollers - MCU

Through Hole

PDIP-20

8051

8 bit

24 MHz

4 kB

128 B

No ADC

15 I/O

- 40 C

+ 85 C

Tube

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

CY8C3245LTI-163
Infineon Technologies
1: Rp178.874
733In Stock

Mfr. Part No.
CY8C3245LTI-163

Mouser Part No
727-CY8C3245LTI-163

Infineon Technologies

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

Learn More

Datasheet

733In Stock

Rp178.874

Rp139.246

Rp123.285

Rp118.332

View

Min.: 1
Mult.: 1

8-bit Microcontrollers - MCU

SMD/SMT

QFN-68

8051

8 bit

50 MHz

32 kB

4 kB

12 bit

46 I/O

- 40 C

+ 85 C

Tray

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

EFM8SB10F2G-A-QFN20
Silicon Labs
1: Rp22.749
3.441In Stock
6.300Expected 09/10/2026

Mfr. Part No.
EFM8SB10F2G-A-QFN20

Mouser Part No
634-8SB10F2GAQF20

Silicon Labs

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

Learn More

Datasheet

3.441In Stock

6.300Expected 09/10/2026

Rp22.749

Rp19.447

Rp17.961

Rp16.034

View

Min.: 1
Mult.: 1

8-bit Microcontrollers - MCU

SMD/SMT

QFN-20

CIP-51 8051

8 bit

25 MHz

2 kB

256 B

12 bit

16 I/O

- 40 C

+ 85 C

Tube

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

CY8C3245LTI-139
Infineon Technologies
1: Rp176.855
449In Stock

Mfr. Part No.
CY8C3245LTI-139

Mouser Part No
727-CY8C3245LTI-139

Infineon Technologies

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

Learn More

Datasheet

449In Stock

Rp176.855

Rp137.595

Rp121.817

Rp116.864

View

Min.: 1
Mult.: 1

8-bit Microcontrollers - MCU

SMD/SMT

QFN-48

8051

8 bit

50 MHz

32 kB

4 kB

12 bit

29 I/O

- 40 C

+ 85 C

Tray

8-bit Microcontrollers - MCU 8051 25 MHz 64 kB flash 4 kB RAM 8-bit Sleepy Bee MCU

EFM8SB20F64G-B-QFN32
Silicon Labs
1: Rp82.557
1.161In 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

Datasheet

1.161In Stock

Rp82.557

Rp54.671

Rp49.901

Rp42.379

View

Min.: 1
Mult.: 1

8-bit Microcontrollers - MCU

SMD/SMT

QFN-32

CIP-51 8051

8 bit

25 MHz

64 kB

4.25 kB

10 bit

24 I/O

- 40 C

+ 85 C

Tube

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

EFM8SB10F2G-A-QFN20R
Silicon Labs
1: Rp24.951
9.635In Stock
9.000Expected 14/08/2026

Mfr. Part No.
EFM8SB10F2G-A-QFN20R

Mouser Part No
634-8SB10F2GAQF20R

Silicon Labs

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

Datasheet

9.635In Stock

9.000Expected 14/08/2026

Cut Tape

Rp24.951

Rp20.914

Rp19.263

Rp16.897

Reel

Rp12.952

View

MouseReel Available

Min.: 1
Mult.: 1

: 1.500

8-bit Microcontrollers - MCU

SMD/SMT

QFN-20

CIP-51 8051

8 bit

25 MHz

2 kB

256 B

12 bit

16 I/O

- 40 C

+ 85 C

Reel, Cut Tape, MouseReel

8-bit Microcontrollers - MCU Single-Cycle 8051 8K ISP Flash MCU

AT89LP52-20JU
Microchip Technology
1: Rp63.294
130In Stock

Mfr. Part No.
AT89LP52-20JU

Mouser Part No
556-AT89LP52-20JU

Microchip Technology

8-bit Microcontrollers - MCU Single-Cycle 8051 8K ISP Flash MCU

Learn More

Datasheet

130In Stock

Rp63.294

Min.: 1
Mult.: 1

8-bit Microcontrollers - MCU

SMD/SMT

PLCC-44

8051

8 bit

20 MHz

8 kB

256 B

No ADC

36 I/O

- 40 C

+ 85 C

Tube

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

EFM8SB10F8G-A-QFN20
Silicon Labs
1: Rp29.537
4.233In Stock

Mfr. Part No.
EFM8SB10F8G-A-QFN20

Mouser Part No
634-8SB10F8GAQF20

Silicon Labs

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

Learn More

Datasheet

4.233In Stock

Rp29.537

Rp25.134

Rp22.015

Rp19.814

View

Min.: 1
Mult.: 1

8-bit Microcontrollers - MCU

SMD/SMT

QFN-20

CIP-51 8051

8 bit

25 MHz

8 kB

512 B

12 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

EFM8BB51F16I-C-QFN20R
Silicon Labs
1: Rp20.364
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

Datasheet

12.398In Stock

Cut Tape

Rp20.364

Rp17.355

Rp16.126

Rp14.383

View

Reel

Rp9.833

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

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: Rp22.015
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

Rp22.015

Rp18.896

Rp17.502

Rp14.603

View

Min.: 1
Mult.: 1

8-bit Microcontrollers - MCU

SMD/SMT

SOIC-16

8 bit

50 MHz

16 kB

512 B

12 bit

12 I/O

- 40 C

+ 85 C

Tube

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

EFM8SB10F8G-A-QFN24R
Silicon Labs
1: Rp33.023
3.031In Stock

Mfr. Part No.
EFM8SB10F8G-A-QFN24R

Mouser Part No
634-8SB10F8GAQF24R

Silicon Labs

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

Datasheet

3.031In Stock

Cut Tape

Rp33.023

Rp27.519

Rp25.317

Rp22.382

Reel

Rp16.805

View

MouseReel Available

Min.: 1
Mult.: 1

: 1.500

8-bit Microcontrollers - MCU

SMD/SMT

CIP-51 8051

8 bit

25 MHz

8 kB

512 B

12 bit

17 I/O

- 40 C

+ 85 C

Reel, Cut Tape, MouseReel

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

EFM8BB10F2G-A-QFN20R
Silicon Labs
1: Rp16.695
15.601In Stock

Mfr. Part No.
EFM8BB10F2G-A-QFN20R

Mouser Part No
634-8BB10F2GAQF20R

Silicon Labs

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

Learn More

Datasheet

15.601In Stock

Cut Tape

Rp16.695

Rp13.980

Rp12.897

Rp11.375

Reel

Rp8.549

View

MouseReel Available

Min.: 1
Mult.: 1

: 1.500

8-bit Microcontrollers - MCU

SMD/SMT

QFN-20

CIP-51 8051

8 bit

25 MHz

2 kB

256 B

12 bit

16 I/O

- 40 C

+ 85 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

EFM8BB50F16G-A-QFN16
Silicon Labs
1: Rp18.529
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

Rp18.529

Rp15.851

Rp14.750

Rp14.457

View

Min.: 1
Mult.: 1

8-bit Microcontrollers - MCU

SMD/SMT

QFN-16

8 bit

50 MHz

16 kB

512 B

12 bit

12 I/O

- 40 C

+ 85 C

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-SOIC16
Silicon Labs
1: Rp22.749
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

Rp22.749

Rp19.447

Rp17.961

Rp16.016

View

Min.: 1
Mult.: 1

8-bit Microcontrollers - MCU

SMD/SMT

SOIC-16

8 bit

50 MHz

16 kB

512 B

12 bit

12 I/O

- 40 C

+ 125 C

Tube

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: Rp18.529
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

Rp18.529

Rp15.851

Rp14.750

Rp13.154

View

Min.: 1
Mult.: 1

8-bit Microcontrollers - MCU

SMD/SMT

SOIC-16

8 bit

50 MHz

4 kB

512 B

12 bit

12 I/O

- 40 C

+ 125 C

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: Rp20.364
995In 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

995In Stock

Rp20.364

Rp17.355

Rp15.227

Rp13.980

View

Min.: 1
Mult.: 1

8-bit Microcontrollers - MCU

SMD/SMT

SOIC-16

8 bit

50 MHz

8 kB

512 B

12 bit

12 I/O

- 40 C

+ 85 C

Tube

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

EFM8SB10F8G-A-QFN20R
Silicon Labs
1: Rp47.149
8.908In Stock

Mfr. Part No.
EFM8SB10F8G-A-QFN20R

Mouser Part No
634-8SB10F8GAQF20R

Silicon Labs

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

Datasheet

8.908In Stock

Cut Tape

Rp47.149

Rp30.454

Rp27.152

Rp22.382

Reel

Rp14.970

View

MouseReel Available

Min.: 1
Mult.: 1

: 1.500

8-bit Microcontrollers - MCU

SMD/SMT

QFN-20

CIP-51 8051

8 bit

25 MHz

8 kB

512 B

12 bit

16 I/O

- 40 C

+ 85 C

Reel, Cut Tape, MouseReel

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: Rp14.310
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

Rp14.310

Rp12.292

Rp11.448

Rp10.806

View

Min.: 1
Mult.: 1

8-bit Microcontrollers - MCU

SMD/SMT

QFN-12

8 bit

50 MHz

4 kB

512 B

12 bit

9 I/O

- 40 C

+ 85 C

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-QFN12
Silicon Labs
1: Rp19.080
607In Stock

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

607In Stock

Rp19.080

Rp16.273

Rp14.292

Rp12.127

View

Min.: 1
Mult.: 1

8-bit Microcontrollers - MCU

SMD/SMT

QFN-12

8 bit

50 MHz

16 kB

512 B

12 bit

9 I/O

- 40 C

+ 85 C

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: Rp30.454
1.000In Stock

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

1.000In Stock

Cut Tape

Rp30.454

Rp19.447

Rp17.282

Rp14.218

View

Reel

Rp8.604

MouseReel Available

Min.: 1
Mult.: 1

: 3.000

8-bit Microcontrollers - MCU

SMD/SMT

QFN-16

8 bit

50 MHz

16 kB

512 B

12 bit

12 I/O

- 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-QFP32
Silicon Labs
1: Rp75.586
1.246In Stock
End of Life

Mfr. Part No.
EFM8BB31F32I-D-QFP32

Mouser Part No
634-EF8BB31F32IDQP32

End of Life

Silicon Labs

8-bit Microcontrollers - MCU 8051 50 MHz 32 kB flash 2.25 kB RAM 8-bit Busy Bee MCU

Learn More

Datasheet

1.246In Stock

Rp75.586

Rp50.085

Rp45.682

Rp38.710

View

Min.: 1
Mult.: 1

8-bit Microcontrollers - MCU

SMD/SMT

QFP-32

CIP-51 8051

8 bit

50 MHz

32 kB

2.3 kB

10 bit, 12 bit

28 I/O

- 40 C

+ 125 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

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