8-bit Microcontrollers - MCU 8051 50 MHz 64 kB flash 4.25 kB RAM 8-bit Busy Bee MCU
+1 image
EFM8BB31F64G-D-QFN24R
Silicon Labs
1:
$4.99
2,270 In Stock
Mouser Part No 634-EF8BB31F64GDF24R
Silicon Labs
8-bit Microcontrollers - MCU 8051 50 MHz 64 kB flash 4.25 kB RAM 8-bit Busy Bee MCU
2,270 In Stock
Alternative Packaging
1
$4.99
10
$3.37
25
$3.13
100
$2.72
1,500
$1.81
3,000
View
250
$2.54
500
$2.23
1,000
$1.85
3,000
$1.75
Buy
Min.: 1 Mult.: 1
Reel :1,500
Details
CIP-51 8051
64 kB
4.35 kB
QFN-24
50 MHz
10 bit, 12 bit
20 I/O
2.2 V
3.6 V
SMD/SMT
8 bit
- 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
+1 image
EFM8BB31F64G-D-QFN24
Silicon Labs
1:
$4.99
6,387 In Stock
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
6,387 In Stock
Alternative Packaging
1
$4.99
10
$3.37
25
$3.13
100
$2.72
250
View
250
$2.54
500
$2.23
1,000
$1.85
2,520
$1.81
5,040
$1.75
Buy
Min.: 1 Mult.: 1
Details
CIP-51 8051
64 kB
4.35 kB
QFN-24
50 MHz
10 bit, 12 bit
20 I/O
2.2 V
3.6 V
SMD/SMT
8 bit
- 40 C
+ 85 C
Tube
8-bit Microcontrollers - MCU 8051 50 MHz 64 kB flash 4.25 kB RAM 8-bit Busy Bee MCU
+1 image
EFM8BB31F64I-D-4QFN24R
Silicon Labs
1:
$5.48
1,395 In Stock
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
1,395 In Stock
Alternative Packaging
1
$5.48
10
$3.63
25
$3.30
100
$2.80
1,500
$2.01
3,000
View
250
$2.67
500
$2.39
1,000
$2.07
3,000
$1.97
Buy
Min.: 1 Mult.: 1
Reel :1,500
Details
CIP-51 8051
64 kB
4.35 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, Cut Tape, MouseReel
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
1,599 In Stock
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
1,599 In Stock
Alternative Packaging
1
$5.92
10
$3.92
25
$3.56
100
$3.03
250
View
250
$2.88
500
$2.58
1,000
$2.24
2,450
$2.16
4,900
$2.12
Buy
Min.: 1 Mult.: 1
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
Tray
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:
$2.49
14,898 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
14,898 In Stock
Alternative Packaging
1
$2.49
10
$1.59
25
$1.41
100
$1.16
250
View
2,500
$0.709
250
$1.01
500
$0.962
1,000
$0.835
2,500
$0.709
Buy
Min.: 1 Mult.: 1
Reel :2,500
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 8051 25 MHz 4 kB Flash 0.5 kB RAM 8-bit Busy Bee MCU
+2 images
EFM8BB10F4G-A-QFN20
Silicon Labs
1:
$2.62
218 In Stock
Mouser Part No 634-8BB10F4GAQF20
Silicon Labs
8-bit Microcontrollers - MCU 8051 25 MHz 4 kB Flash 0.5 kB RAM 8-bit Busy Bee MCU
218 In Stock
Alternative Packaging
1
$2.62
10
$1.67
25
$1.50
100
$1.23
250
View
250
$1.07
500
$1.02
1,000
$0.854
2,520
$0.779
5,040
$0.756
Buy
Min.: 1 Mult.: 1
Details
CIP-51 8051
4 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
+2 images
EFM8BB10F8G-A-QFN20
Silicon Labs
1:
$2.69
141 In Stock
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
141 In Stock
Alternative Packaging
1
$2.69
10
$1.71
25
$1.52
100
$1.26
250
View
250
$1.10
500
$1.04
1,000
$0.876
2,520
$0.80
5,040
$0.77
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
+4 images
EFM8BB10F8G-A-SOIC16
Silicon Labs
1:
$2.69
1,572 In Stock
Mouser Part No 634-8BB10F8GASO16
Silicon Labs
8-bit Microcontrollers - MCU 8051 25 MHz 8 kB flash 0.5 kB RAM 8-bit Busy Bee MCU
1,572 In Stock
Alternative Packaging
1
$2.69
10
$1.71
25
$1.52
100
$1.26
250
View
250
$1.10
500
$1.04
1,008
$0.876
2,016
$0.80
5,040
$0.77
Buy
Min.: 1 Mult.: 1
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
Tube
8-bit Microcontrollers - MCU 8051 25 MHz 8 kB flash 0.5 kB RAM 8-bit Busy Bee MCU
EFM8BB10F8A-A-QFN20
Silicon Labs
1:
$4.80
20 In Stock
Mouser Part No 634-FM8BB10F8AAQFN20
Silicon Labs
8-bit Microcontrollers - MCU 8051 25 MHz 8 kB flash 0.5 kB RAM 8-bit Busy Bee MCU
20 In Stock
Alternative Packaging
1
$4.80
10
$3.16
25
$2.92
100
$2.54
250
View
250
$2.38
500
$2.08
1,000
$1.74
2,520
$1.69
5,040
$1.65
Buy
Min.: 1 Mult.: 1
Details
CIP-51 8051
8 kB
512 B
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 50 MHz 16 kB flash 2.25 kB RAM 8-bit Busy Bee MCU
+1 image
EFM8BB21F16I-C-QSOP24
Silicon Labs
1:
$2.60
3,126 In Stock
End of Life
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
3,126 In Stock
Alternative Packaging
1
$2.60
10
$2.20
100
$2.07
2,352
$1.93
5,880
$1.44
Buy
Min.: 1 Mult.: 1
Details
CIP-51 8051
16 kB
2.3 kB
QSOP-24
50 MHz
12 bit
21 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
EFM8BB31F16G-D-QFP32
Silicon Labs
1:
$4.49
1,070 In Stock
End of Life
Mouser Part No 634-EF8BB31F16GDQP32
End of Life
Silicon Labs
8-bit Microcontrollers - MCU 8051 50 MHz 16 kB flash 2.25 kB RAM 8-bit Busy Bee MCU
1,070 In Stock
Alternative Packaging
1
$4.49
10
$2.95
25
$2.73
100
$2.38
250
View
250
$2.23
500
$1.96
1,000
$1.63
2,500
$1.58
5,000
$1.54
Buy
Min.: 1 Mult.: 1
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
+ 85 C
Tray
8-bit Microcontrollers - MCU 8051 50 MHz 64 kB flash 4.25 kB RAM 8-bit Busy Bee MCU
EFM8BB31F64I-D-5QFN32
Silicon Labs
1:
$6.12
1,374 In Stock
End of Life
Mouser Part No 634-EF8BB31F64ID5F32
End of Life
Silicon Labs
8-bit Microcontrollers - MCU 8051 50 MHz 64 kB flash 4.25 kB RAM 8-bit Busy Bee MCU
1,374 In Stock
Alternative Packaging
1
$6.12
10
$4.05
25
$3.70
100
$3.14
250
View
250
$2.98
500
$2.68
1,000
$2.31
2,500
$2.23
4,599
$2.19
Buy
Min.: 1 Mult.: 1
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
Tube
8-bit Microcontrollers - MCU 8051 25 MHz 4 kB flash 0.5 kB RAM 8-bit Busy Bee MCU
+2 images
EFM8BB10F4I-A-QFN20
Silicon Labs
1:
$3.03
244 In Stock
End of Life
Mouser Part No 634-M8BB10F4IAQFN20
End of Life
Silicon Labs
8-bit Microcontrollers - MCU 8051 25 MHz 4 kB flash 0.5 kB RAM 8-bit Busy Bee MCU
244 In Stock
Alternative Packaging
1
$3.03
10
$1.94
25
$1.73
100
$1.43
250
View
250
$1.24
500
$1.18
1,000
$0.987
2,520
$0.902
5,040
$0.866
Buy
Min.: 1 Mult.: 1
Details
CIP-51 8051
4 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
EFM8BB21F16G-C-QFN20
Silicon Labs
1:
$3.39
278 In Stock
2,520 Expected 19/2/2027
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
278 In Stock
2,520 Expected 19/2/2027
Alternative Packaging
1
$3.39
10
$2.19
25
$1.96
100
$1.62
250
View
250
$1.52
500
$1.32
1,000
$1.15
2,520
$1.05
Buy
Min.: 1 Mult.: 1
Details
CIP-51 8051
16 kB
2.3 kB
QFN-20
50 MHz
12 bit
16 I/O
2.2 V
3.6 V
SMD/SMT
8 bit
- 40 C
+ 85 C
EFM8BB2
Tube
8-bit Microcontrollers - MCU 8051 50 MHz 16 kB flash 2.25 kB RAM 8-bit Busy Bee MCU
+2 images
EFM8BB22F16G-C-QFN28
Silicon Labs
1:
$4.05
1,412 In Stock
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
1,412 In Stock
Alternative Packaging
1
$4.05
10
$2.64
25
$2.39
100
$2.01
250
View
250
$1.89
500
$1.65
1,000
$1.43
2,500
$1.35
4,599
$1.32
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
+ 85 C
EFM8BB2
Tube
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:
$3.54
179 In Stock
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
179 In Stock
Alternative Packaging
1
$3.54
10
$2.30
25
$2.09
100
$1.77
250
View
1,500
$1.25
250
$1.66
500
$1.46
1,000
$1.25
1,500
$1.25
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
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:
$5.21
218 In Stock
9,800 On Order
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
218 In Stock
9,800 On Order
View Dates
Alternative Packaging
Stock:
218 Can Dispatch Immediately
On Order:
4,900 Expected 16/10/2026
4,900 Expected 30/10/2026
Factory Lead Time:
16 Weeks
1
$5.21
10
$3.52
25
$3.26
100
$2.83
250
View
250
$2.65
500
$2.33
1,000
$1.93
2,450
$1.89
4,900
$1.84
Buy
Min.: 1 Mult.: 1
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
+ 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
EFM8BB51F16G-C-TSSOP20
Silicon Labs
1:
$1.55
1,052 In Stock
400 Expected 29/7/2026
Mouser Part No 634-EFM8516GCTSSOP20
Silicon Labs
8-bit Microcontrollers - MCU 5 Volt 8051 50 Mhz 16 kB flash 1.28 kB RAM 16 GPIO BB5 8-bit MCU
1,052 In Stock
400 Expected 29/7/2026
Alternative Packaging
1
$1.55
10
$1.32
25
$1.23
100
$1.04
200
View
200
$1.01
600
$0.976
1,000
$0.942
2,600
$0.66
5,000
$0.639
Buy
Min.: 1 Mult.: 1
Details
16 kB
1.28 kB
TSSOP-20
16 I/O
1.8 V
5.5 V
SMD/SMT
- 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
EFM8BB51F16G-C-QFN20
Silicon Labs
1:
$2.33
151 In Stock
Mouser Part No 634-EFM851F16GCQFN20
Silicon Labs
8-bit Microcontrollers - MCU 5 Volt 8051 50 Mhz 16 kB flash 1.28 kB RAM 16 GPIO BB5 8-bit MCU
151 In Stock
Alternative Packaging
1
$2.33
10
$1.50
25
$1.32
100
$1.09
200
View
200
$0.949
600
$0.90
1,000
$0.756
2,600
$0.69
5,000
$0.669
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 5 Volt 8051 50 Mhz 16 kB flash 1.28 kB RAM 16 GPIO BB5 8-bit MCU
EFM8BB51F16G-C-QFN20R
Silicon Labs
1:
$2.33
1,060 In Stock
7,500 Expected 4/1/2027
Mouser Part No 634-EFM851F16GQFN20R
Silicon Labs
8-bit Microcontrollers - MCU 5 Volt 8051 50 Mhz 16 kB flash 1.28 kB RAM 16 GPIO BB5 8-bit MCU
1,060 In Stock
7,500 Expected 4/1/2027
Alternative Packaging
1
$2.33
10
$1.50
25
$1.32
100
$1.09
250
View
2,500
$0.664
250
$0.951
500
$0.902
1,000
$0.783
2,500
$0.664
Buy
Min.: 1 Mult.: 1
Reel :2,500
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 16 kB flash 1.28 kB RAM 16 GPIO BB5 8-bit MCU
EFM8BB51F16I-C-QFN20
Silicon Labs
1:
$2.49
194 In Stock
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
194 In Stock
Alternative Packaging
1
$2.49
10
$1.59
25
$1.41
100
$1.16
200
View
200
$1.01
600
$0.96
1,000
$0.806
2,600
$0.736
5,000
$0.713
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 5 Volt 8051 50 Mhz 16 kB flash 1.28 kB RAM 16 GPIO BB5 8-bit MCU
EFM8BB51F16I-C-TSSOP20
Silicon Labs
1:
$2.72
146 In Stock
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
146 In Stock
Alternative Packaging
1
$2.72
10
$1.74
25
$1.55
100
$1.27
200
View
200
$1.11
600
$1.05
1,000
$0.881
2,600
$0.805
5,000
$0.775
Buy
Min.: 1 Mult.: 1
Details
16 kB
1.28 kB
TSSOP-20
16 I/O
1.8 V
5.5 V
SMD/SMT
- 40 C
+ 85 C
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-TSSOP20
Silicon Labs
1:
$2.09
297 In Stock
Mouser Part No 634-EFM851F8GCTSOP20
Silicon Labs
8-bit Microcontrollers - MCU 5 Volt 8051 50 Mhz 8 kB flash 1.28 kB RAM 16 GPIO BB5 8-bit MCU
297 In Stock
Alternative Packaging
1
$2.09
10
$1.37
25
$1.24
100
$1.05
200
View
200
$0.934
600
$0.895
1,000
$0.781
2,600
$0.713
5,000
$0.691
Buy
Min.: 1 Mult.: 1
Details
16 kB
1.28 kB
TSSOP-20
16 I/O
1.8 V
5.5 V
SMD/SMT
- 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-QFN20
Silicon Labs
1:
$2.09
246 In Stock
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
246 In Stock
Alternative Packaging
1
$2.09
10
$1.34
25
$1.19
100
$0.982
200
View
200
$0.854
600
$0.809
1,000
$0.68
2,600
$0.62
5,000
$0.601
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 5 Volt 8051 50 Mhz 16 kB flash 1.28 kB RAM 29 GPIO BB5 8-bit MCU
EFM8BB52F16G-C-QFN32
Silicon Labs
1:
$1.84
331 In Stock
2,400 On Order
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
331 In Stock
2,400 On Order
View Dates
Alternative Packaging
Stock:
331 Can Dispatch Immediately
On Order:
800 Expected 11/9/2026
1,600 Expected 18/9/2026
Factory Lead Time:
24 Weeks
1
$1.84
10
$1.23
25
$1.12
100
$0.917
200
View
200
$0.854
600
$0.809
1,000
$0.68
2,600
$0.62
5,000
$0.601
Buy
Min.: 1 Mult.: 1
Details
16 kB
1.28 kB
QFN-32
12 bit
29I/O
1.8 V
5.5 V
SMD/SMT
- 40 C
+ 85 C
Cut Tape
