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8051 microcontroller Microcontrollers - MCU

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Types of Microcontrollers - MCU

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Part #

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

CY8C3445PVI-094
Infineon Technologies
1: $16.78
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

$16.78

$14.99

$11.59

$11.45

View

Min.: 1
Mult.: 1

SMD/SMT

SSOP-48

8051

32 kB

8 bit

12 bit

50 MHz

29 I/O

4 kB

1.71 V

5.5 V

- 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: $5.92
1,309In 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

1,309In Stock

$5.92

$3.92

$3.56

$3.03

View

Min.: 1
Mult.: 1

SMD/SMT

QFN-32

CIP-51 8051

64 kB

8 bit

10 bit, 12 bit

50 MHz

29 I/O

4.35 kB

2.2 V

3.6 V

- 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: $4.53
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

$4.53

$2.98

$2.75

$2.39

Reel

$1.85

View

Min.: 1
Mult.: 1

: 1,500

SMD/SMT

QFN-24

CIP-51 8051

32 kB

8 bit

10 bit, 12 bit

50 MHz

20 I/O

2.3 kB

2.2 V

3.6 V

- 40 C

+ 125 C

Reel, Cut Tape

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: $4.92
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

$4.92

$4.12

$3.62

$3.43

View

Min.: 1
Mult.: 1

SMD/SMT

QFN-32

CIP-51 8051

64 kB

8 bit

10 bit/12 bit/14 bit

72 MHz

29 I/O

4.25 kB

2.2 V

3.6 V

- 40 C

+ 105 C

Tray

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: $6.07
1,498In Stock

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

1,498In Stock

Cut Tape

$6.07

$4.01

$3.64

$3.10

View

Reel

$2.58

Min.: 1
Mult.: 1

: 1,500

SMD/SMT

QFN-20

CIP-51 8051

16 kB

8 bit

12 bit

50 MHz

16 I/O

2.25 kB

2.2 V

3.6 V

- 40 C

+ 125 C

AEC-Q100

Reel, Cut Tape

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

AT89C4051-24SU
Microchip Technology
1: $2.03
615In 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

615In Stock

$2.03

$2.01

$1.82

Min.: 1
Mult.: 1

SMD/SMT

SOIC-20

8051

4 kB

8 bit

No ADC

24 MHz

15 I/O

128 B

4 V

6 V

- 40 C

+ 85 C

Tube

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: $3.44
5,987In 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

5,987In Stock

$3.44

$2.90

$2.53

$2.37

View

Min.: 1
Mult.: 1

SMD/SMT

QFN-24

CIP-51 8051

64 kB

8 bit

10 bit, 12 bit

50 MHz

20 I/O

4.35 kB

2.2 V

3.6 V

- 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: $3.88
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

$3.88

$2.88

$2.64

$2.37

Reel

$2.14

View

MouseReel Available

Min.: 1
Mult.: 1

: 1,500

SMD/SMT

QFN-24

CIP-51 8051

64 kB

8 bit

10 bit, 12 bit

50 MHz

20 I/O

4.35 kB

2.2 V

3.6 V

- 40 C

+ 125 C

Reel, Cut Tape, MouseReel

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

EFM8BB21F16I-C-QFN20
Silicon Labs
1: $2.38
3,268In Stock

Mfr. Part No.
EFM8BB21F16I-C-QFN20

Mouser Part No
634-8BB21F16I-CQFN20

Silicon Labs

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

Learn More

Datasheet

3,268In Stock

$2.38

$2.01

$1.77

$1.65

View

Min.: 1
Mult.: 1

SMD/SMT

QFN-20

CIP-51 8051

16 kB

8 bit

12 bit

50 MHz

16 I/O

2.3 kB

2.2 V

3.6 V

- 40 C

+ 125 C

Tube

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: $3.37
2In 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

2In Stock

$3.37

$1.58

$1.47

$1.40

View

Min.: 1
Mult.: 1

SMD/SMT

QFN-20

CIP-51 8051

4 kB

8 bit

12 bit

25 MHz

16 I/O

512 B

1.8 V

3.6 V

- 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: $4.87
4,042In 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

4,042In Stock

Cut Tape

$4.87

$3.98

$3.45

$3.26

Reel

$2.54

View

Min.: 1
Mult.: 1

: 2,500

SMD/SMT

QFN-32

CIP-51 8051

64 kB

8 bit

10 bit/12 bit/14 bit

72 MHz

29 I/O

4.25 kB

2.2 V

3.6 V

- 40 C

+ 105 C

Reel, Cut Tape

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

EFM8UB20F64G-B-QFN32
Silicon Labs
1: $4.96
323In 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

323In Stock

$4.96

$3.97

$3.51

$3.24

View

Min.: 1
Mult.: 1

SMD/SMT

QFN-32

CIP-51 8051

64 kB

8 bit

10 bit

48 MHz

25 I/O

4.25 kB

3.3 V

- 40 C

+ 85 C

Tube

8-bit Microcontrollers - MCU Sngl-Cycle 8051 IND 2.4-3.6V 32K ISP FL

AT89LP3240-20AU
Microchip Technology
1: $14.27
60In Stock

Mfr. Part No.
AT89LP3240-20AU

Mouser Part No
556-AT89LP3240-20AU

Microchip Technology

8-bit Microcontrollers - MCU Sngl-Cycle 8051 IND 2.4-3.6V 32K ISP FL

Datasheet

60In Stock

$14.27

$13.12

$12.58

Min.: 1
Mult.: 1

SMD/SMT

TQFP-44

8051

32 kB

8 bit

10 bit

20 MHz

38 I/O

4.25 kB

2.4 V

3.6 V

- 40 C

+ 85 C

Tray

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

EFM8BB52F16G-C-QFN20
Silicon Labs
1: $1.25
234In Stock

Mfr. Part No.
EFM8BB52F16G-C-QFN20

Mouser Part No
634-EFM852F16GCQFN20

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

234In Stock

$1.25

$0.997

$0.71

$0.679

View

Min.: 1
Mult.: 1

SMD/SMT

QFN-20

16 kB

16 I/O

1.28 kB

1.8 V

5.5 V

- 40 C

+ 85 C

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: $2.39
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

$2.39

$1.97

$1.75

$1.60

View

Min.: 1
Mult.: 1

SMD/SMT

QSOP-24

CIP-51 8051

8 kB

8 bit

12 bit

25 MHz

17 I/O

512 B

1.8 V

3.6 V

- 40 C

+ 85 C

Tube

8-bit Microcontrollers - MCU Low Pin Count 8051 Series; 2.4V to 5.5V; -40 to 85

N76E003AT20
Nuvoton
1: $1.13
423In Stock
888Expected 2/10/2026

Mfr. Part No.
N76E003AT20

Mouser Part No
503-N76E003AT20

Nuvoton

8-bit Microcontrollers - MCU Low Pin Count 8051 Series; 2.4V to 5.5V; -40 to 85

Datasheet

423In Stock

888Expected 2/10/2026

$1.13

$0.967

$0.824

$0.777

View

Min.: 1
Mult.: 1

SMD/SMT

TSSOP-20

8051

18 kB

8 bit

12 bit

16 MHz

18 I/O

256 B

2.4 V

5.5 V

- 40 C

+ 105 C

Tube

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: $1.31
1,200In Stock
2,200On Order

Mfr. Part No.
EFM8BB52F16I-C-QFN32

Mouser Part No
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

1,200In Stock

2,200On Order

$1.31

$0.911

$0.854

$0.67

$0.653

Min.: 1
Mult.: 1

SMD/SMT

QFN-32

16 kB

16 I/O

1.28 kB

1.8 V

5.5 V

- 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: $1.94
76In 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

76In Stock

$1.94

$1.66

$1.46

$1.10

View

Min.: 1
Mult.: 1

SMD/SMT

TSSOP-28

16 kB

16 I/O

1.28 kB

1.8 V

5.5 V

- 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-QFN20
Silicon Labs
1: $2.49
2,182In 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

2,182In Stock

$2.49

$1.59

$1.41

$1.16

View

Min.: 1
Mult.: 1

SMD/SMT

QFN-20

16 kB

16 I/O

1.28 kB

1.8 V

5.5 V

- 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: $1.24
307In Stock
1,000Expected 9/10/2026

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

307In Stock

1,000Expected 9/10/2026

$1.24

$0.979

$0.876

$0.782

View

Min.: 1
Mult.: 1

SMD/SMT

QFN-12

16 kB

8 bit

12 bit

50 MHz

9 I/O

512 B

1.8 V

5.5 V

- 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-QFN16
Silicon Labs
1: $1.25
71In 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

71In Stock

$1.25

$1.00

$0.90

$0.758

View

Min.: 1
Mult.: 1

SMD/SMT

QFN-16

16 kB

8 bit

12 bit

50 MHz

12 I/O

512 B

1.8 V

5.5 V

- 40 C

+ 125 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

EFM8BB52F16G-C-QFN20R
Silicon Labs
1: $1.28
2,499In Stock

Mfr. Part No.
EFM8BB52F16G-C-QFN20R

Mouser Part No
634-EFM852F16GQFN20R

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

2,499In Stock

Cut Tape

$1.28

$1.10

$0.967

$0.914

Reel

$0.664

View

Min.: 1
Mult.: 1

: 2,500

SMD/SMT

QFN-20

16 kB

16 I/O

1.28 kB

1.8 V

5.5 V

- 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

EFM8BB51F16I-C-TSSOP20
Silicon Labs
1: $1.55
146In Stock

Mfr. Part No.
EFM8BB51F16I-C-TSSOP20

Mouser Part No
634-EFM851F16TSSOP20

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

146In Stock

$1.55

$1.21

$1.08

$0.966

View

Min.: 1
Mult.: 1

SMD/SMT

TSSOP-20

16 kB

16 I/O

1.28 kB

1.8 V

5.5 V

- 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

EFM8BB52F16G-C-TSSOP20
Silicon Labs
1: $1.55
380In Stock

Mfr. Part No.
EFM8BB52F16G-C-TSSOP20

Mouser Part No
634-EFM852F16GCTOP20

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

380In Stock

$1.55

$1.31

$1.15

$1.05

View

Min.: 1
Mult.: 1

SMD/SMT

TSSOP-20

16 kB

16 I/O

1.28 kB

1.8 V

5.5 V

- 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-QFN20
Silicon Labs
1: $1.36
194In Stock

Mfr. Part No.
EFM8BB51F16I-C-QFN20

Mouser Part No
634-EFM851F16ICQFN20

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

194In Stock

$1.36

$1.15

$0.826

$0.79

View

Min.: 1
Mult.: 1

SMD/SMT

QFN-20

16 kB

16 I/O

1.28 kB

1.8 V

5.5 V

- 40 C

+ 85 C

Cut Tape

8051 microcontroller Microcontrollers - MCU

Types of Microcontrollers - MCU

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CSP-16
DFN-10
LQFP-32
LQFP-44
LQFP-48
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-40
QFN-48

6 I/O
8 I/O
9 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
33 I/O

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