8-bit Microcontrollers - MCU 8051 4K FLASH 2.7 TO 5.5V 24MHZ 4V-5.5V
+1 image
AT89C4051-24PU
Microchip Technology
1:
HK$17.43
1,088 In Stock
Mouser Part No
556-A89C4051-24PU
Microchip Technology
8-bit Microcontrollers - MCU 8051 4K FLASH 2.7 TO 5.5V 24MHZ 4V-5.5V
1,088 In Stock
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8-bit Microcontrollers - MCU 64K Flash 67MHz 8051 0.5V to 5.5V
CY8C3866PVI-070
Infineon Technologies
1:
HK$181.83
237 In Stock
Mouser Part No
727-CY8C3866PVI-070
Infineon Technologies
8-bit Microcontrollers - MCU 64K Flash 67MHz 8051 0.5V to 5.5V
237 In Stock
Alternative Packaging
1
HK$181.83
10
HK$167.11
25
HK$129.30
100
HK$125.03
250
View
250
HK$124.86
450
HK$117.30
900
Quote
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Min.: 1
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8-bit Microcontrollers - MCU 32K Flash 50MHz 8051 1.71V to 5.5V
CY8C3245LTI-139
Infineon Technologies
1:
HK$79.24
449 In Stock
Mouser Part No
727-CY8C3245LTI-139
Infineon Technologies
8-bit Microcontrollers - MCU 32K Flash 50MHz 8051 1.71V to 5.5V
449 In Stock
Alternative Packaging
1
HK$79.24
10
HK$61.65
25
HK$54.58
100
HK$52.36
250
View
250
HK$49.98
500
HK$48.58
1,000
HK$45.79
2,600
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8-bit Microcontrollers - MCU 8051 25 MHz 2 kB flash 0.25 kB RAM 8-bit Busy Bee MCU
+2 images
EFM8BB10F2G-A-QFN20R
Silicon Labs
1:
HK$7.48
15,601 In Stock
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
15,601 In Stock
Alternative Packaging
1
HK$7.48
10
HK$6.26
25
HK$5.43
100
HK$5.10
1,500
HK$3.75
3,000
View
500
HK$4.44
1,000
HK$4.09
3,000
HK$3.43
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Min.: 1
Mult.: 1
Reel :
1,500
Details
8-bit Microcontrollers - MCU 32K Flash 50MHz 8051 1.71V to 5.5V
+1 image
CY8C3245LTI-163
Infineon Technologies
1:
HK$80.15
733 In Stock
Mouser Part No
727-CY8C3245LTI-163
Infineon Technologies
8-bit Microcontrollers - MCU 32K Flash 50MHz 8051 1.71V to 5.5V
733 In Stock
Alternative Packaging
1
HK$80.15
10
HK$62.39
25
HK$55.24
100
HK$53.02
250
View
250
HK$50.55
1,000
HK$46.36
2,600
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8-bit Microcontrollers - MCU 64K Flash 67MHz 8051 0.5V to 5.5V
+1 image
CY8C3666LTI-027
Infineon Technologies
1:
HK$185.44
147 In Stock
Mouser Part No
727-CY8C3666LTI-027
Infineon Technologies
8-bit Microcontrollers - MCU 64K Flash 67MHz 8051 0.5V to 5.5V
147 In Stock
Alternative Packaging
1
HK$185.44
10
HK$148.21
25
HK$133.33
100
HK$132.75
260
View
260
HK$123.63
520
HK$119.11
1,040
Quote
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8-bit Microcontrollers - MCU 64K Flash 50MHz 8051 1.71V to 5.5V
CY8C3246PVI-147
Infineon Technologies
1:
HK$98.56
371 In Stock
Mouser Part No
727-CY8C3246PVI-147
Infineon Technologies
8-bit Microcontrollers - MCU 64K Flash 50MHz 8051 1.71V to 5.5V
371 In Stock
Alternative Packaging
1
HK$98.56
10
HK$92.89
25
HK$67.90
100
HK$65.35
600
View
600
HK$61.49
1,200
HK$58.36
3,000
Quote
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Min.: 1
Mult.: 1
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8-bit Microcontrollers - MCU 64K Flash 67MHz 8051 0.5V to 5.5V
CY8C3866AXI-040
Infineon Technologies
1:
HK$226.71
307 In Stock
Mouser Part No
727-CY8C3866AXI-040
Infineon Technologies
8-bit Microcontrollers - MCU 64K Flash 67MHz 8051 0.5V to 5.5V
307 In Stock
Alternative Packaging
1
HK$226.71
10
HK$177.39
25
HK$169.41
100
HK$151.49
250
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250
HK$145.58
450
HK$141.30
900
Quote
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Min.: 1
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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:
HK$9.12
995 In Stock
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
995 In Stock
Alternative Packaging
1
HK$9.12
10
HK$7.78
25
HK$6.82
100
HK$6.26
250
View
250
HK$5.83
500
HK$5.33
1,008
HK$4.81
2,016
HK$4.45
5,040
HK$4.31
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Min.: 1
Mult.: 1
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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:
HK$8.30
648 In Stock
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
648 In Stock
Alternative Packaging
1
HK$8.30
10
HK$7.10
25
HK$6.61
100
HK$5.89
250
View
250
HK$5.47
500
HK$4.96
1,008
HK$4.55
2,016
HK$4.14
5,040
HK$4.02
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Min.: 1
Mult.: 1
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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:
HK$10.19
959 In Stock
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
959 In Stock
Alternative Packaging
1
HK$10.19
10
HK$8.71
25
HK$7.60
100
HK$7.01
250
View
250
HK$6.52
500
HK$5.98
1,008
HK$5.40
2,016
HK$5.01
5,040
HK$4.85
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Min.: 1
Mult.: 1
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8-bit Microcontrollers - MCU Single Cycle 8051 4K ISP FL
AT89LP51-20AU
Microchip Technology
1:
HK$14.14
130 In Stock
480 Expected 28/9/2026
Mouser Part No
556-AT89LP51-20AU
Microchip Technology
8-bit Microcontrollers - MCU Single Cycle 8051 4K ISP FL
130 In Stock
480 Expected 28/9/2026
1
HK$14.14
25
HK$12.82
100
HK$11.67
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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:
HK$8.55
607 In Stock
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
607 In Stock
Alternative Packaging
1
HK$8.55
10
HK$7.29
25
HK$6.40
100
HK$5.70
200
View
200
HK$5.52
600
HK$4.84
1,000
HK$4.35
2,600
HK$3.73
5,000
HK$3.41
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Min.: 1
Mult.: 1
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Development Boards & Kits - 8051 MCU University Kit includes Toolstick University Starter Kit and Textbook
MCUNIVERSITYKIT
Silicon Labs
1:
HK$637.21
N/A
Mouser Part No
634-MCUNIVERSITYKIT
Silicon Labs
Development Boards & Kits - 8051 MCU University Kit includes Toolstick University Starter Kit and Textbook
N/A
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Mult.: 1
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Development Boards & Kits - 8051 EFM8BB50 Explorer Kit
BB50-EK2702A
Silicon Labs
1:
HK$249.23
15 In Stock
Mouser Part No
634-BB50-EK2702A
Silicon Labs
Development Boards & Kits - 8051 EFM8BB50 Explorer Kit
15 In Stock
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8-bit Microcontrollers - MCU 8051 25 MHz 2 kB flash 0.25 kB RAM 8-bit Sleepy Bee MCU
+2 images
EFM8SB10F2G-A-QFN20R
Silicon Labs
1:
HK$11.18
6,578 In Stock
9,000 Expected 1/9/2026
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
6,578 In Stock
9,000 Expected 1/9/2026
Alternative Packaging
1
HK$11.18
10
HK$9.37
25
HK$8.06
100
HK$7.57
1,500
HK$5.44
3,000
View
250
HK$7.50
500
HK$6.63
1,000
HK$6.05
3,000
HK$5.24
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Min.: 1
Mult.: 1
Reel :
1,500
Details
8-bit Microcontrollers - MCU 8051 25 MHz 2 kB flash 0.25 kB RAM 8-bit Sleepy Bee MCU
+2 images
EFM8SB10F2G-A-QFN20
Silicon Labs
1:
HK$10.60
3,429 In Stock
6,300 Expected 9/10/2026
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
3,429 In Stock
6,300 Expected 9/10/2026
Alternative Packaging
1
HK$10.60
10
HK$9.04
25
HK$7.89
100
HK$7.06
500
View
500
HK$6.61
1,000
HK$5.97
2,100
HK$5.44
4,200
HK$5.24
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Min.: 1
Mult.: 1
Details
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:
HK$9.86
1,546 In Stock
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
1,546 In Stock
Alternative Packaging
1
HK$9.86
10
HK$8.47
25
HK$7.41
100
HK$6.85
250
View
250
HK$6.01
500
HK$5.69
1,008
HK$4.78
2,016
HK$4.36
5,040
HK$4.23
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Min.: 1
Mult.: 1
Details
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:
HK$13.65
1,000 In Stock
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
1,000 In Stock
Alternative Packaging
1
HK$13.65
10
HK$8.71
25
HK$7.74
100
HK$6.37
250
View
3,000
HK$3.86
250
HK$5.56
500
HK$5.26
1,000
HK$4.42
3,000
HK$3.86
Buy
Min.: 1
Mult.: 1
Reel :
3,000
Details
8-bit Microcontrollers - MCU 8051 25 MHz 8 kB flash 0.5 kB RAM 8-bit Sleepy Bee MCU
+2 images
EFM8SB10F8G-A-QFN20
Silicon Labs
1:
HK$13.23
4,233 In Stock
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
4,233 In Stock
Alternative Packaging
1
HK$13.23
10
HK$11.26
25
HK$9.86
100
HK$8.88
500
View
500
HK$8.30
1,000
HK$7.22
2,100
HK$6.71
4,200
HK$6.56
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Min.: 1
Mult.: 1
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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:
HK$9.12
12,398 In Stock
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
12,398 In Stock
Alternative Packaging
1
HK$9.12
10
HK$7.78
25
HK$6.82
100
HK$6.26
2,500
HK$4.42
5,000
View
250
HK$5.83
500
HK$5.33
1,000
HK$4.88
5,000
HK$3.75
Buy
Min.: 1
Mult.: 1
Reel :
2,500
8-bit Microcontrollers - MCU 8051 25 MHz 8 kB flash 0.5 kB RAM 8-bit Sleepy Bee MCU
+2 images
EFM8SB10F8G-A-QFN20R
Silicon Labs
1:
HK$13.97
8,908 In Stock
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
8,908 In Stock
Alternative Packaging
1
HK$13.97
10
HK$11.59
25
HK$10.03
100
HK$9.45
1,500
HK$6.71
3,000
View
500
HK$8.30
1,000
HK$7.43
3,000
HK$6.56
Buy
Min.: 1
Mult.: 1
Reel :
1,500
Details
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:
HK$8.30
973 In Stock
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
973 In Stock
Alternative Packaging
1
HK$8.30
10
HK$7.10
25
HK$6.61
100
HK$6.48
200
View
200
HK$5.28
600
HK$5.12
1,000
HK$4.55
2,600
HK$4.14
5,000
HK$4.02
Buy
Min.: 1
Mult.: 1
Details
8-bit Microcontrollers - MCU 8051 25 MHz 8 kB flash 0.5 kB RAM 8-bit Busy Bee MCU
+2 images
EFM8BB10F8G-A-QFN20R
Silicon Labs
1:
HK$7.56
12,671 In Stock
73,500 On Order
Mouser Part No
634-8BB10F8GAQF20R
Silicon Labs
8-bit Microcontrollers - MCU 8051 25 MHz 8 kB flash 0.5 kB RAM 8-bit Busy Bee MCU
12,671 In Stock
73,500 On Order
View Dates
Alternative Packaging
Stock:
12,671 Can Dispatch Immediately
On Order:
21,000 Expected 5/11/2026
52,500 Expected 10/11/2026
Factory Lead Time:
12 Weeks
1
HK$7.56
10
HK$6.40
100
HK$5.26
250
HK$4.92
500
View
1,500
HK$4.11
500
HK$4.34
1,000
HK$4.22
1,500
HK$4.11
Buy
Min.: 1
Mult.: 1
Reel :
1,500
Details
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:
HK$6.41
706 In Stock
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
706 In Stock
Alternative Packaging
1
HK$6.41
10
HK$5.51
25
HK$5.13
200
HK$4.84
600
View
600
HK$4.25
1,000
HK$3.81
2,600
HK$3.36
5,000
HK$3.07
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Min.: 1
Mult.: 1
Details