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
2,499 In Stock
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
2,499 In Stock
Alternative Packaging
1
$1.28
10
$1.10
25
$0.967
100
$0.914
2,500
$0.664
5,000
View
250
$0.883
500
$0.775
1,000
$0.733
5,000
$0.608
Buy
Min.: 1
Mult.: 1
Reel :
2,500
Details
16 kB
1.28 kB
QFN-20
16 I/O
1.8 V
5.5 V
SMD/SMT
- 40 C
+ 85 C
Reel, Cut Tape
8-bit Microcontrollers - MCU 5 Volt 8051 50 Mhz 8 kB flash 1.28 kB RAM 16 GPIO BB5 8-bit MCU
EFM8BB51F8G-C-QFN20
Silicon Labs
1:
$2.65
294 In Stock
Mouser Part No
634-EFM8B51F8GCQFN20
Silicon Labs
8-bit Microcontrollers - MCU 5 Volt 8051 50 Mhz 8 kB flash 1.28 kB RAM 16 GPIO BB5 8-bit MCU
294 In Stock
Alternative Packaging
1
$2.65
10
$1.62
25
$1.41
100
$1.06
600
View
600
$0.895
1,000
$0.804
2,600
$0.69
5,000
$0.63
Buy
Min.: 1
Mult.: 1
Details
16 kB
1.28 kB
QFN-20
16 I/O
1.8 V
5.5 V
SMD/SMT
- 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
+1 image
EFM8BB21F16A-C-QFN20
Silicon Labs
1:
$5.58
44 In Stock
2,520 Expected 1/9/2026
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
44 In Stock
2,520 Expected 1/9/2026
Alternative Packaging
1
$5.58
10
$4.03
25
$3.66
100
$3.02
250
View
250
$2.90
500
$2.65
1,000
$2.50
2,520
$2.46
Buy
Min.: 1
Mult.: 1
Details
CIP-51 8051
16 kB
2.25 kB
QFN-20
50 MHz
12 bit
16 I/O
2.2 V
3.6 V
SMD/SMT
8 bit
- 40 C
+ 125 C
EFM8BB2
AEC-Q100
Tube
8-bit Microcontrollers - MCU 8051 50 MHz 32 kB flash 2.25 kB RAM 8-bit Busy Bee MCU
+1 image
EFM8BB31F32I-D-4QFN24
Silicon Labs
1:
$4.53
475 In Stock
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
475 In Stock
Alternative Packaging
1
$4.53
10
$2.98
25
$2.75
100
$2.39
250
View
250
$2.24
500
$1.96
1,000
$1.65
1,911
$1.63
5,733
$1.59
Buy
Min.: 1
Mult.: 1
Details
CIP-51 8051
32 kB
2.3 kB
QFN-24
50 MHz
10 bit, 12 bit
20 I/O
2.2 V
3.6 V
SMD/SMT
8 bit
- 40 C
+ 125 C
Tube
8-bit Microcontrollers - MCU 8051 25 MHz 8 kB flash 0.5 kB RAM 8-bit Busy Bee MCU
+4 images
EFM8BB10F8G-A-SOIC16R
Silicon Labs
1:
$1.78
5,000 Expected 15/9/2026
Mouser Part No
634-8BB10F8GASO16R
Silicon Labs
8-bit Microcontrollers - MCU 8051 25 MHz 8 kB flash 0.5 kB RAM 8-bit Busy Bee MCU
5,000 Expected 15/9/2026
Alternative Packaging
1
$1.78
10
$1.48
25
$1.28
100
$1.16
2,500
$0.80
5,000
View
250
$1.01
500
$0.964
1,000
$0.832
5,000
$0.77
Buy
Min.: 1
Mult.: 1
Reel :
2,500
Details
CIP-51 8051
8 kB
512 B
SOIC-16
25 MHz
12 bit
13 I/O
2.2 V
3.6 V
SMD/SMT
8 bit
- 40 C
+ 85 C
EFM8BB1
Reel, Cut Tape, MouseReel
8-bit Microcontrollers - MCU 8051 25 MHz 8 kB flash 0.5 kB RAM 8-bit Busy Bee MCU
+1 image
EFM8BB10F8I-A-QFN20
Silicon Labs
1:
$1.71
2,520 Expected 1/9/2026
Mouser Part No
634-FM8BB10F8IAQFN20
Silicon Labs
8-bit Microcontrollers - MCU 8051 25 MHz 8 kB flash 0.5 kB RAM 8-bit Busy Bee MCU
2,520 Expected 1/9/2026
Alternative Packaging
1
$1.71
10
$1.47
25
$1.28
100
$1.19
500
View
500
$1.06
1,000
$1.02
2,520
$0.902
5,040
$0.868
Buy
Min.: 1
Mult.: 1
Details
CIP-51 8051
8 kB
512 B
QFN-20
25 MHz
12 bit
16 I/O
2.2 V
3.6 V
SMD/SMT
8 bit
- 40 C
+ 125 C
EFM8BB1
Tube
8-bit Microcontrollers - MCU 8051 50 MHz 16 kB flash 2.25 kB RAM 8-bit Busy Bee MCU
+2 images
EFM8BB22F16I-C-QFN28
Silicon Labs
1:
$4.32
1 In Stock
Mouser Part No
634-8BB22F16ICQFN28
Silicon Labs
8-bit Microcontrollers - MCU 8051 50 MHz 16 kB flash 2.25 kB RAM 8-bit Busy Bee MCU
1 In Stock
Alternative Packaging
1
$4.32
10
$2.82
25
$2.58
100
$2.22
250
View
250
$2.09
500
$1.89
1,000
$1.58
2,500
$1.54
4,599
$1.47
Buy
Min.: 1
Mult.: 1
Details
CIP-51 8051
16 kB
2.3 kB
QFN-28
50 MHz
12 bit
22 I/O
2.2 V
3.6 V
SMD/SMT
8 bit
- 40 C
+ 125 C
EFM8BB2
Tube
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
1,498 Expected 1/9/2026
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
1,498 Expected 1/9/2026
Alternative Packaging
1
$6.07
10
$4.01
25
$3.64
100
$3.10
250
View
1,500
$2.58
250
$2.94
500
$2.64
1,000
$2.58
1,500
$2.58
Buy
Min.: 1
Mult.: 1
Reel :
1,500
Details
CIP-51 8051
16 kB
2.25 kB
QFN-20
50 MHz
12 bit
16 I/O
2.2 V
3.6 V
SMD/SMT
8 bit
- 40 C
+ 125 C
EFM8BB2
AEC-Q100
Reel, Cut Tape
8-bit Microcontrollers - MCU 8051 50 MHz 64 kB flash 4.25 kB RAM 8-bit Busy Bee MCU
EFM8BB31F64I-D-QFN32R
Silicon Labs
1:
$5.59
2,430 Expected 11/9/2026
Mouser Part No
634-EF8BB31F64IDN32R
Silicon Labs
8-bit Microcontrollers - MCU 8051 50 MHz 64 kB flash 4.25 kB RAM 8-bit Busy Bee MCU
2,430 Expected 11/9/2026
Alternative Packaging
1
$5.59
10
$3.70
25
$3.37
100
$2.86
250
View
2,500
$2.15
250
$2.71
500
$2.43
1,000
$2.16
2,500
$2.15
Buy
Min.: 1
Mult.: 1
Reel :
2,500
Details
CIP-51 8051
64 kB
4.35 kB
QFN-32
50 MHz
10 bit, 12 bit
29 I/O
2.2 V
3.6 V
SMD/SMT
8 bit
- 40 C
+ 125 C
Reel, Cut Tape
8-bit Microcontrollers - MCU 8051 25 MHz 8 kB flash 0.5 kB RAM 8-bit Busy Bee MCU
+2 images
EFM8BB10F8G-A-QFN20
Silicon Labs
1:
$1.58
Lead-Time 12 Weeks
Mouser Part No
634-8BB10F8GAQF20
Silicon Labs
8-bit Microcontrollers - MCU 8051 25 MHz 8 kB flash 0.5 kB RAM 8-bit Busy Bee MCU
Lead-Time 12 Weeks
Alternative Packaging
1
$1.58
10
$1.35
25
$1.18
100
$1.10
250
View
250
$1.02
500
$0.934
1,000
$0.861
2,520
$0.824
5,040
$0.804
Buy
Min.: 1
Mult.: 1
Details
CIP-51 8051
8 kB
512 B
QFN-20
25 MHz
12 bit
16 I/O
2.2 V
3.6 V
SMD/SMT
8 bit
- 40 C
+ 85 C
EFM8BB1
Tube
8-bit Microcontrollers - MCU 8051 25 MHz 8 kB flash 0.5 kB RAM 8-bit Busy Bee MCU
EFM8BB10F8I-A-SOIC16R
Silicon Labs
2,500:
$0.934
Non-Stocked Lead-Time 12 Weeks
Mouser Part No
634-8BB10F8IASOIC16R
Silicon Labs
8-bit Microcontrollers - MCU 8051 25 MHz 8 kB flash 0.5 kB RAM 8-bit Busy Bee MCU
Non-Stocked Lead-Time 12 Weeks
Alternative Packaging
2,500
$0.934
5,000
$0.915
Buy
Min.: 2,500
Mult.: 2,500
Reel :
2,500
Details
CIP-51 8051
8 kB
512 B
SOIC-16
25 MHz
12 bit
13 I/O
2.2 V
3.6 V
SMD/SMT
8 bit
- 40 C
+ 125 C
EFM8BB1
Reel
8-bit Microcontrollers - MCU 8051 25 MHz 2 kB Flash 0.25 kB RAM 8-bit Busy Bee MCU
EFM8BB10F2A-A-QFN20
Silicon Labs
1:
$3.37
Non-Stocked Lead-Time 12 Weeks
Mouser Part No
634-FM8BB10F2AAQFN20
Silicon Labs
8-bit Microcontrollers - MCU 8051 25 MHz 2 kB Flash 0.25 kB RAM 8-bit Busy Bee MCU
Non-Stocked Lead-Time 12 Weeks
Alternative Packaging
1
$3.37
10
$2.84
25
$2.49
100
$2.33
500
View
500
$2.07
1,000
$1.82
2,520
$1.77
5,040
$1.74
Buy
Min.: 1
Mult.: 1
Details
CIP-51 8051
2 kB
256 B
QFN-20
25 MHz
12 bit
16 I/O
2.2 V
3.6 V
SMD/SMT
8 bit
- 40 C
+ 125 C
EFM8BB1
AEC-Q100
Tube
8-bit Microcontrollers - MCU 8051 25 MHz 2 kB Flash 0.25 kB RAM 8-bit Busy Bee MCU
EFM8BB10F2A-A-QFN20R
Silicon Labs
1:
$4.75
Non-Stocked Lead-Time 12 Weeks
Mouser Part No
634-M8BB10F2AAQFN20R
Silicon Labs
8-bit Microcontrollers - MCU 8051 25 MHz 2 kB Flash 0.25 kB RAM 8-bit Busy Bee MCU
Non-Stocked Lead-Time 12 Weeks
Alternative Packaging
1
$4.75
10
$3.13
25
$2.88
100
$2.50
250
View
1,500
$1.74
250
$2.35
500
$2.05
1,000
$1.75
1,500
$1.74
Buy
Min.: 1
Mult.: 1
Reel :
1,500
Details
CIP-51 8051
2 kB
256 B
QFN-20
25 MHz
12 bit
16 I/O
2.2 V
3.6 V
SMD/SMT
8 bit
- 40 C
+ 125 C
EFM8BB1
AEC-Q100
Reel, Cut Tape
8-bit Microcontrollers - MCU 8051 25 MHz 2 kB flash 0.25 kB RAM 8-bit Busy Bee MCU
+2 images
EFM8BB10F2I-A-QFN20R
Silicon Labs
1:
$2.23
Non-Stocked Lead-Time 12 Weeks
Mouser Part No
634-M8BB10F2IAQFN20R
Silicon Labs
8-bit Microcontrollers - MCU 8051 25 MHz 2 kB flash 0.25 kB RAM 8-bit Busy Bee MCU
Non-Stocked Lead-Time 12 Weeks
Alternative Packaging
1
$2.23
10
$1.43
25
$1.27
100
$1.04
1,500
$0.676
3,000
View
250
$0.91
500
$0.862
1,000
$0.724
3,000
$0.66
Buy
Min.: 1
Mult.: 1
Reel :
1,500
Details
CIP-51 8051
2 kB
256 B
QFN-20
25 MHz
12 bit
16 I/O
2.2 V
3.6 V
SMD/SMT
8 bit
- 40 C
+ 125 C
EFM8BB1
Reel, Cut Tape
8-bit Microcontrollers - MCU 8051 25 MHz 8 kB flash 0.5 kB RAM 8-bit Busy Bee MCU
EFM8BB10F8A-A-QFN20R
Silicon Labs
1,500:
$1.77
Non-Stocked Lead-Time 12 Weeks
Mouser Part No
634-M8BB10F8AAQFN20R
Silicon Labs
8-bit Microcontrollers - MCU 8051 25 MHz 8 kB flash 0.5 kB RAM 8-bit Busy Bee MCU
Non-Stocked Lead-Time 12 Weeks
Alternative Packaging
Buy
Min.: 1,500
Mult.: 1,500
Reel :
1,500
Details
CIP-51 8051
8 kB
512 B
QFN-20
25 MHz
12 bit
16 I/O
2.2 V
3.6 V
SMD/SMT
8 bit
- 40 C
+ 125 C
EFM8BB1
AEC-Q100
Reel
8-bit Microcontrollers - MCU 8051 25 MHz 8 kB flash 0.5 kB RAM 8-bit Busy Bee MCU
+2 images
EFM8BB10F8I-A-QFN20R
Silicon Labs
1:
$3.03
Non-Stocked Lead-Time 12 Weeks
Mouser Part No
634-M8BB10F8IAQFN20R
Silicon Labs
8-bit Microcontrollers - MCU 8051 25 MHz 8 kB flash 0.5 kB RAM 8-bit Busy Bee MCU
Non-Stocked Lead-Time 12 Weeks
Alternative Packaging
1
$3.03
10
$1.94
25
$1.73
100
$1.43
1,500
$0.941
3,000
View
250
$1.24
500
$1.18
1,000
$0.987
3,000
$0.926
Buy
Min.: 1
Mult.: 1
Reel :
1,500
Details
CIP-51 8051
8 kB
512 B
QFN-20
25 MHz
12 bit
16 I/O
2.2 V
3.6 V
SMD/SMT
8 bit
- 40 C
+ 125 C
EFM8BB1
Reel, Cut Tape
8-bit Microcontrollers - MCU 8051 50 MHz 16 kB flash 2.25 kB RAM 8-bit Busy Bee MCU
+2 images
EFM8BB22F16I-C-QFN28R
Silicon Labs
1,500:
$1.70
Non-Stocked Lead-Time 31 Weeks
Mouser Part No
634-8BB22F16ICQFN28R
Silicon Labs
8-bit Microcontrollers - MCU 8051 50 MHz 16 kB flash 2.25 kB RAM 8-bit Busy Bee MCU
Non-Stocked Lead-Time 31 Weeks
Alternative Packaging
Buy
Min.: 1,500
Mult.: 1,500
Reel :
1,500
Details
CIP-51 8051
16 kB
2.3 kB
QFN-28
50 MHz
12 bit
22 I/O
2.2 V
3.6 V
SMD/SMT
8 bit
- 40 C
+ 125 C
EFM8BB2
Reel
8-bit Microcontrollers - MCU 8051 50 MHz 16 kB flash 2.25 kB RAM 8-bit Busy Bee MCU
+1 image
EFM8BB31F16A-D-4QFN24R
Silicon Labs
1,500:
$2.46
Non-Stocked Lead-Time 16 Weeks
Mouser Part No
634-EF8BB31F16AD424R
Silicon Labs
8-bit Microcontrollers - MCU 8051 50 MHz 16 kB flash 2.25 kB RAM 8-bit Busy Bee MCU
Non-Stocked Lead-Time 16 Weeks
Alternative Packaging
Buy
Min.: 1,500
Mult.: 1,500
Reel :
1,500
Details
CIP-51 8051
16 kB
2.3 kB
QFN-24
50 MHz
10 bit, 12 bit
20 I/O
2.2 V
3.6 V
SMD/SMT
8 bit
- 40 C
+ 125 C
Reel
8-bit Microcontrollers - MCU 8051 50 MHz 16 kB flash 2.25 kB RAM 8-bit Busy Bee MCU
+1 image
EFM8BB31F16A-D-4QFN24
Silicon Labs
1,911:
$2.46
Non-Stocked Lead-Time 16 Weeks
Mouser Part No
634-EF8BB31F16AD4F24
Silicon Labs
8-bit Microcontrollers - MCU 8051 50 MHz 16 kB flash 2.25 kB RAM 8-bit Busy Bee MCU
Non-Stocked Lead-Time 16 Weeks
Alternative Packaging
Buy
Min.: 1,911
Mult.: 1,911
Details
CIP-51 8051
16 kB
2.3 kB
QFN-24
50 MHz
10 bit, 12 bit
20 I/O
2.2 V
3.6 V
SMD/SMT
8 bit
- 40 C
+ 125 C
Tube
8-bit Microcontrollers - MCU 8051 50 MHz 16 kB flash 2.25 kB RAM 8-bit Busy Bee MCU
EFM8BB31F16A-D-5QFN32R
Silicon Labs
1,500:
$2.72
Non-Stocked Lead-Time 16 Weeks
Mouser Part No
634-EF8BB31F16AD532R
Silicon Labs
8-bit Microcontrollers - MCU 8051 50 MHz 16 kB flash 2.25 kB RAM 8-bit Busy Bee MCU
Non-Stocked Lead-Time 16 Weeks
Alternative Packaging
Buy
Min.: 1,500
Mult.: 1,500
Reel :
1,500
Details
CIP-51 8051
16 kB
2.3 kB
QFN-32
50 MHz
10 bit, 12 bit
29 I/O
2.2 V
3.6 V
SMD/SMT
8 bit
- 40 C
+ 125 C
Reel
8-bit Microcontrollers - MCU 8051 50 MHz 16 kB flash 2.25 kB RAM 8-bit Busy Bee MCU
EFM8BB31F16A-D-5QFN32
Silicon Labs
1,533:
$2.82
Non-Stocked Lead-Time 16 Weeks
Mouser Part No
634-EF8BB31F16AD5F32
Silicon Labs
8-bit Microcontrollers - MCU 8051 50 MHz 16 kB flash 2.25 kB RAM 8-bit Busy Bee MCU
Non-Stocked Lead-Time 16 Weeks
Alternative Packaging
1,533
$2.82
3,066
$2.75
4,599
$2.72
Buy
Min.: 1,533
Mult.: 1,533
Details
CIP-51 8051
16 kB
2.3 kB
QFN-32
50 MHz
10 bit, 12 bit
29 I/O
2.2 V
3.6 V
SMD/SMT
8 bit
- 40 C
+ 125 C
Tube
8-bit Microcontrollers - MCU 8051 50 MHz 16 kB flash 2.25 kB RAM 8-bit Busy Bee MCU
EFM8BB31F16I-D-5QFN32R
Silicon Labs
1:
$4.04
Non-Stocked Lead-Time 16 Weeks
Mouser Part No
634-EF8BB31F16ID532R
Silicon Labs
8-bit Microcontrollers - MCU 8051 50 MHz 16 kB flash 2.25 kB RAM 8-bit Busy Bee MCU
Non-Stocked Lead-Time 16 Weeks
Alternative Packaging
1
$4.04
10
$2.62
25
$2.41
100
$2.07
1,500
$1.46
3,000
View
250
$1.94
500
$1.70
1,000
$1.47
3,000
$1.44
Buy
Min.: 1
Mult.: 1
Reel :
1,500
Details
CIP-51 8051
16 kB
2.3 kB
QFN-32
50 MHz
10 bit, 12 bit
29 I/O
2.2 V
3.6 V
SMD/SMT
8 bit
- 40 C
+ 125 C
Reel, Cut Tape
8-bit Microcontrollers - MCU 8051 50 MHz 16 kB flash 2.25 kB RAM 8-bit Busy Bee MCU
EFM8BB31F16I-D-5QFN32
Silicon Labs
1:
$4.04
Non-Stocked Lead-Time 16 Weeks
Mouser Part No
634-EF8BB31F16ID5F32
Silicon Labs
8-bit Microcontrollers - MCU 8051 50 MHz 16 kB flash 2.25 kB RAM 8-bit Busy Bee MCU
Non-Stocked Lead-Time 16 Weeks
Alternative Packaging
1
$4.04
10
$2.62
25
$2.41
100
$2.07
250
View
250
$1.94
500
$1.70
1,000
$1.51
2,500
$1.47
4,599
$1.44
Buy
Min.: 1
Mult.: 1
Details
CIP-51 8051
16 kB
2.3 kB
QFN-32
50 MHz
10 bit, 12 bit
29 I/O
2.2 V
3.6 V
SMD/SMT
8 bit
- 40 C
+ 125 C
Tube
8-bit Microcontrollers - MCU 8051 50 MHz 16 kB flash 2.25 kB RAM 8-bit Busy Bee MCU
EFM8BB31F16I-D-QFP32R
Silicon Labs
1:
$4.60
Lead-Time 16 Weeks
Mouser Part No
634-EF8BB31F16IDP32R
Silicon Labs
8-bit Microcontrollers - MCU 8051 50 MHz 16 kB flash 2.25 kB RAM 8-bit Busy Bee MCU
Lead-Time 16 Weeks
Alternative Packaging
1
$4.60
10
$3.03
25
$2.80
100
$2.43
500
$1.92
1,000
View
250
$2.28
1,000
$1.77
2,500
$1.74
5,000
$1.71
Buy
Min.: 1
Mult.: 1
Reel :
500
Details
CIP-51 8051
16 kB
2.3 kB
QFP-32
50 MHz
10 bit, 12 bit
28 I/O
2.2 V
3.6 V
SMD/SMT
8 bit
- 40 C
+ 125 C
Reel, Cut Tape
8-bit Microcontrollers - MCU 8051 50 MHz 32 kB flash 2.25 kB RAM 8-bit Busy Bee MCU
EFM8BB31F32A-D-5QFN32R
Silicon Labs
1,500:
$2.80
Non-Stocked Lead-Time 16 Weeks
Mouser Part No
634-EF8BB31F32AD532R
Silicon Labs
8-bit Microcontrollers - MCU 8051 50 MHz 32 kB flash 2.25 kB RAM 8-bit Busy Bee MCU
Non-Stocked Lead-Time 16 Weeks
Alternative Packaging
Buy
Min.: 1,500
Mult.: 1,500
Reel :
1,500
Details
CIP-51 8051
32 kB
2.3 kB
QFN-32
50 MHz
10 bit, 12 bit
29 I/O
2.2 V
3.6 V
SMD/SMT
8 bit
- 40 C
+ 125 C
Reel