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8051 microcontroller Embedded Processors & Controllers

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Part #

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

EFM8BB21F16I-C-QSOP24
Silicon Labs
1: HK$15.70
3,126In Stock
End of Life

Mfr. Part No.
EFM8BB21F16I-C-QSOP24

Mouser Part No
634-8BB21F16ICQSOP24

End of Life

Silicon Labs

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

Learn More

Datasheet

3,126In Stock

HK$15.70

HK$13.32

HK$12.49

HK$11.67

HK$8.71

Min.: 1
Mult.: 1

8-bit Microcontrollers - MCU

SMD/SMT

QSOP-24

CIP-51 8051

8 bit

50 MHz

16 kB

2.3 kB

12 bit

21 I/O

- 40 C

+ 125 C

Tube

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

CY8C3244AXI-153
Infineon Technologies
1: HK$92.72
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

HK$92.72

HK$72.17

HK$65.51

HK$52.69

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

EFM8BB52F16G-C-QFN32
Silicon Labs
1: HK$7.73
1,119In Stock
1,600On Order

Mfr. Part No.
EFM8BB52F16G-C-QFN32

Mouser Part No
634-EFM852F16GCQFN32

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

1,119In Stock

1,600On Order

HK$7.73

HK$6.65

HK$5.58

HK$5.33

View

Min.: 1
Mult.: 1

8-bit Microcontrollers - MCU

SMD/SMT

QFN-32

16 kB

1.28 kB

12 bit

29I/O

- 40 C

+ 85 C

Cut Tape

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

EFM8BB22F16G-C-QFN28
Silicon Labs
1: HK$17.26
1,412In Stock

Mfr. Part No.
EFM8BB22F16G-C-QFN28

Mouser Part No
634-8BB22F16GCQFN28

Silicon Labs

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

Learn More

Datasheet

1,412In Stock

HK$17.26

HK$14.55

HK$12.41

HK$11.75

View

Min.: 1
Mult.: 1

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

Tube

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

EFM8UB10F16G-C-QFN28
Silicon Labs
1: HK$22.28
473In Stock

Mfr. Part No.
EFM8UB10F16G-C-QFN28

Mouser Part No
634-8UB10F16GCQFN28

Silicon Labs

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

Datasheet

473In Stock

HK$22.28

HK$18.74

HK$15.95

HK$15.12

View

Min.: 1
Mult.: 1

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

Tube

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

CY8C3246LTI-149
Infineon Technologies
1: HK$118.04
8In Stock

Mfr. Part No.
CY8C3246LTI-149

Mouser Part No
727-CY8C3246LTI-149

Infineon Technologies

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

Learn More

Datasheet

8In Stock

HK$118.04

HK$91.65

HK$82.69

HK$77.93

View

Min.: 1
Mult.: 1

8-bit Microcontrollers - MCU

SMD/SMT

QFN-68

8051

8 bit

50 MHz

64 kB

8 kB

12 bit

46 I/O

- 40 C

+ 85 C

Tray

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

EFM8UB10F16G-C-QFN20R
Silicon Labs
1: HK$25.40
117In 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

117In Stock

49,500On Order

Cut Tape

HK$25.40

HK$18.50

HK$16.69

HK$15.04

View

Reel

HK$12.41

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 64 kB flash 4.25 kB RAM 8-bit Busy Bee MCU

EFM8BB31F64G-D-QFN32
Silicon Labs
1: HK$21.54
88In Stock
9,800On Order

Mfr. Part No.
EFM8BB31F64G-D-QFN32

Mouser Part No
634-EF8BB31F64GDQN32

Silicon Labs

8-bit Microcontrollers - MCU 8051 50 MHz 64 kB flash 4.25 kB RAM 8-bit Busy Bee MCU

Learn More

Datasheet

88In Stock

9,800On Order

HK$21.54

HK$18.08

HK$15.86

HK$15.04

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

+ 85 C

Tray

8-bit Microcontrollers - MCU 8051 75 MHz 16 kB flash 1.25 kB RAM 8-bit Laser Bee MCU

EFM8LB11F16E-C-QFP32
Silicon Labs
1: HK$33.13
36In Stock

Mfr. Part No.
EFM8LB11F16E-C-QFP32

Mouser Part No
634-LB11F16ECQFP32

Silicon Labs

8-bit Microcontrollers - MCU 8051 75 MHz 16 kB flash 1.25 kB RAM 8-bit Laser Bee MCU

Learn More

Datasheet

36In Stock

HK$33.13

HK$21.95

HK$19.97

HK$16.93

View

Min.: 1
Mult.: 1

8-bit Microcontrollers - MCU

SMD/SMT

QFP-32

CIP-51 8051

8 bit

72 MHz

16 kB

1.25 kB

10 bit/12 bit/14 bit

28 I/O

- 40 C

+ 105 C

Tray

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

EFM8BB21F16I-C-QFN20R
Silicon Labs
1: HK$21.37
166In Stock

Mfr. Part No.
EFM8BB21F16I-C-QFN20R

Mouser Part No
634-BB21F16ICQFN20R

Silicon Labs

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

Learn More

Datasheet

166In Stock

Cut Tape

HK$21.37

HK$13.89

HK$12.66

HK$10.69

View

Reel

HK$7.77

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

16 I/O

- 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

EFM8BB21F16G-C-QFN20
Silicon Labs
1: HK$13.23
109In Stock
2,520Expected 8/1/2027

Mfr. Part No.
EFM8BB21F16G-C-QFN20

Mouser Part No
634-8BB21F16GCQFN20

Silicon Labs

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

Learn More

Datasheet

109In Stock

2,520Expected 8/1/2027

HK$13.23

HK$11.26

HK$9.86

HK$9.21

View

Min.: 1
Mult.: 1

8-bit Microcontrollers - MCU

SMD/SMT

QFN-20

CIP-51 8051

8 bit

50 MHz

16 kB

2.3 kB

12 bit

16 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-QFN20
Silicon Labs
1: HK$25.48
281In Stock

Mfr. Part No.
EFM8UB10F16G-C-QFN20

Mouser Part No
634-8UB10F16GCQFN20

Silicon Labs

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

Datasheet

281In Stock

HK$25.48

HK$18.50

HK$17.10

HK$14.96

View

Min.: 1
Mult.: 1

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

Tube

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

CY8C3446LTI-085
Infineon Technologies
1: HK$132.75
6In Stock

Mfr. Part No.
CY8C3446LTI-085

Mouser Part No
727-CY8C3446LTI-085

Infineon Technologies

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

Learn More

Datasheet

6In Stock

HK$132.75

HK$103.90

HK$93.54

HK$88.45

View

Min.: 1
Mult.: 1

8-bit Microcontrollers - MCU

SMD/SMT

QFN-68

8051

8 bit

50 MHz

64 kB

8 kB

12 bit

48 I/O

- 40 C

+ 85 C

Tray

8-bit Microcontrollers - MCU 8051 75 MHz 16 kB flash 1.25 kB RAM 8-bit Laser Bee MCU

EFM8LB10F16E-C-QFP32
Silicon Labs
1: HK$31.48
134In Stock

Mfr. Part No.
EFM8LB10F16E-C-QFP32

Mouser Part No
634-LB10F16ECQFP32

Silicon Labs

8-bit Microcontrollers - MCU 8051 75 MHz 16 kB flash 1.25 kB RAM 8-bit Laser Bee MCU

Learn More

Datasheet

134In Stock

HK$31.48

HK$21.29

HK$19.73

HK$17.10

View

Min.: 1
Mult.: 1

8-bit Microcontrollers - MCU

SMD/SMT

QFP-32

CIP-51 8051

8 bit

72 MHz

16 kB

1.25 kB

10 bit/12 bit/14 bit

28 I/O

- 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-QFN20
Silicon Labs
1: HK$33.70
44In Stock
2,520Expected 1/9/2026

Mfr. Part No.
EFM8BB21F16A-C-QFN20

Mouser Part No
634-EFM8BB21F16FN20

Silicon Labs

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

Learn More

Datasheet

44In Stock

2,520Expected 1/9/2026

HK$33.70

HK$24.33

HK$22.11

HK$19.23

HK$17.34

Min.: 1
Mult.: 1

8-bit Microcontrollers - MCU

SMD/SMT

QFN-20

CIP-51 8051

8 bit

50 MHz

16 kB

2.25 kB

12 bit

16 I/O

- 40 C

+ 125 C

AEC-Q100

Tube

8-bit Microcontrollers - MCU 8051 25 MHz 32 kB flash 4 kB RAM 8-bit Sleepy Bee MCU

EFM8SB20F32G-B-QFN32
Silicon Labs
1: HK$20.80
787In Stock
End of Life

Mfr. Part No.
EFM8SB20F32G-B-QFN32

Mouser Part No
634-EFM8SBF32GBQFN32

End of Life

Silicon Labs

8-bit Microcontrollers - MCU 8051 25 MHz 32 kB flash 4 kB RAM 8-bit Sleepy Bee MCU

Learn More

Datasheet

787In Stock

HK$20.80

HK$17.51

HK$14.88

HK$14.14

View

Min.: 1
Mult.: 1

8-bit Microcontrollers - MCU

SMD/SMT

QFN-32

CIP-51 8051

8 bit

25 MHz

32 kB

4.25 kB

10 bit

24 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-QFP48R
Silicon Labs
1: HK$40.77
63In Stock
End of Life

Mfr. Part No.
EFM8UB20F64G-B-QFP48R

Mouser Part No
634-EFM8UB64GBQFP48R

End of Life

Silicon Labs

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

Datasheet

63In Stock

Cut Tape

HK$40.77

HK$31.48

HK$29.35

HK$27.37

HK$26.72

Reel

HK$21.29

MouseReel Available

Min.: 1
Mult.: 1

: 500

8-bit Microcontrollers - MCU

SMD/SMT

QFP-48

CIP-51 8051

8 bit

48 MHz

64 kB

4.25 kB

10 bit

40 I/O

- 40 C

+ 85 C

Reel, Cut Tape, MouseReel

8-bit Microcontrollers - MCU 8051 25 MHz 32 kB flash 4 kB RAM 8-bit Sleepy Bee MCU

EFM8SB20F32G-B-QFN32R
Silicon Labs
1: HK$30.25
81In Stock
End of Life

Mfr. Part No.
EFM8SB20F32G-B-QFN32R

Mouser Part No
634-EFM8SB32GBQFN32R

End of Life

Silicon Labs

8-bit Microcontrollers - MCU 8051 25 MHz 32 kB flash 4 kB RAM 8-bit Sleepy Bee MCU

Learn More

Datasheet

81In Stock

Cut Tape

HK$30.25

HK$20.47

HK$18.99

HK$16.52

Reel

HK$11.01

View

Min.: 1
Mult.: 1

: 1,500

8-bit Microcontrollers - MCU

SMD/SMT

CIP-51 8051

8 bit

25 MHz

32 kB

4.25 kB

10 bit

24 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

EFM8BB31F64I-D-QFP32
Silicon Labs
1: HK$38.88
5In Stock
End of Life

Mfr. Part No.
EFM8BB31F64I-D-QFP32

Mouser Part No
634-EF8BB31F64IDQP32

End of Life

Silicon Labs

8-bit Microcontrollers - MCU 8051 50 MHz 64 kB flash 4.25 kB RAM 8-bit Busy Bee MCU

Datasheet

5In Stock

HK$38.88

HK$25.65

HK$23.43

HK$19.89

View

Min.: 1
Mult.: 1

8-bit Microcontrollers - MCU

SMD/SMT

QFP-32

CIP-51 8051

8 bit

50 MHz

64 kB

4.35 kB

10 bit, 12 bit

28 I/O

- 40 C

+ 125 C

Tray

8-bit Microcontrollers - MCU 8051 75 MHz 16 kB flash 1.25 kB RAM 8-bit Laser Bee MCU

EFM8LB11F16E-C-QSOP24
Silicon Labs
1: HK$29.26
52In Stock
End of Life

Mfr. Part No.
EFM8LB11F16E-C-QSOP24

Mouser Part No
634-LB11F16ECQSOP24

End of Life

Silicon Labs

8-bit Microcontrollers - MCU 8051 75 MHz 16 kB flash 1.25 kB RAM 8-bit Laser Bee MCU

Datasheet

52In Stock

HK$29.26

HK$19.81

HK$18.33

HK$15.95

View

Min.: 1
Mult.: 1

8-bit Microcontrollers - MCU

SMD/SMT

QSOP-24

CIP-51 8051

8 bit

72 MHz

16 kB

1.25 kB

10 bit/12 bit/14 bit

21 I/O

- 40 C

+ 105 C

Tube

8-bit Microcontrollers - MCU 8051 75 MHz 16 kB flash 1.25 kB RAM 8-bit Laser Bee MCU

EFM8LB10F16E-C-QSOP24
Silicon Labs
1: HK$27.78
53In Stock
End of Life

Mfr. Part No.
EFM8LB10F16E-C-QSOP24

Mouser Part No
634-LB10F16ECQSOP24

End of Life

Silicon Labs

8-bit Microcontrollers - MCU 8051 75 MHz 16 kB flash 1.25 kB RAM 8-bit Laser Bee MCU

Datasheet

53In Stock

HK$27.78

HK$18.33

HK$16.93

HK$14.71

View

Min.: 1
Mult.: 1

8-bit Microcontrollers - MCU

SMD/SMT

QSOP-24

CIP-51 8051

8 bit

72 MHz

16 kB

1.25 kB

10 bit/12 bit/14 bit

21 I/O

- 40 C

+ 105 C

Tube

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

EFM8BB31F32I-D-4QFN24
Silicon Labs
1: HK$27.37
475In Stock

Mfr. Part No.
EFM8BB31F32I-D-4QFN24

Mouser Part No
634-EF8BB31F32ID4F24

Silicon Labs

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

Learn More

Datasheet

475In Stock

HK$27.37

HK$18.00

HK$16.60

HK$14.47

View

Min.: 1
Mult.: 1

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

Tube

8-bit Microcontrollers - MCU 8051 75 MHz 32 kB flash 2.25 kB RAM 8-bit Laser Bee MCU

EFM8LB11F32E-C-QFN24R
Silicon Labs
1: HK$31.48
12In Stock

Mfr. Part No.
EFM8LB11F32E-C-QFN24R

Mouser Part No
634-LB11F32ECQFN24R

Silicon Labs

8-bit Microcontrollers - MCU 8051 75 MHz 32 kB flash 2.25 kB RAM 8-bit Laser Bee MCU

Learn More

Datasheet

12In Stock

Cut Tape

HK$31.48

HK$21.29

HK$19.73

HK$17.10

Reel

HK$11.75

View

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

8-bit Microcontrollers - MCU 8051 75 MHz 32 kB flash 2.25 kB RAM 8-bit Laser Bee MCU

EFM8LB12F32E-C-QFN24
Silicon Labs
1: HK$33.46
257In Stock

Mfr. Part No.
EFM8LB12F32E-C-QFN24

Mouser Part No
634-LB12F32ECQFN24

Silicon Labs

8-bit Microcontrollers - MCU 8051 75 MHz 32 kB flash 2.25 kB RAM 8-bit Laser Bee MCU

Learn More

Datasheet

257In Stock

HK$33.46

HK$22.11

HK$20.14

HK$17.10

View

Min.: 1
Mult.: 1

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

Tube

ARM Microcontrollers - MCU Scalable Mainstream 32-bit Microcontroller (MCU) based on ARM Cortex-M3 Core

LPC1754FBD80K
NXP Semiconductors
1: HK$93.63
830In Stock
1,190Expected 16/11/2026

Mfr. Part No.
LPC1754FBD80K

Mouser Part No
771-LPC1754FBD80K

NXP Semiconductors

ARM Microcontrollers - MCU Scalable Mainstream 32-bit Microcontroller (MCU) based on ARM Cortex-M3 Core

Learn More

Datasheet

830In Stock

1,190Expected 16/11/2026

HK$93.63

HK$73.24

HK$65.10

HK$62.06

View

Min.: 1
Mult.: 1

ARM Microcontrollers - MCU

SMD/SMT

LQFP-80

ARM Cortex M3

32 bit

100 MHz

128 kB

32 kB

12 bit

52 I/O

- 40 C

+ 85 C

Tray

8051 microcontroller Embedded Processors & Controllers

Types of Embedded Processors & Controllers

Customer Service Office

Company

Resources

Support

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-36
QFN-40

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