8-bit Microcontrollers - MCU 32K Flash 50MHz 8051 1.71V to 5.5V
CY8C3245LTI-139
Infineon Technologies
1:
$9.64
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
$9.64
10
$7.50
25
$6.64
100
$6.37
250
View
250
$6.08
500
$5.91
1,000
$5.57
2,600
Quote
Buy
Min.: 1 Mult.: 1
Details
8051
32 kB
4 kB
QFN-48
50 MHz
12 bit
29 I/O
1.71 V
5.5 V
SMD/SMT
8 bit
- 40 C
+ 85 C
CY8C3245
Tray
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:
$1.29
3,429 In Stock
6,300 Expected 09/10/2026
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 09/10/2026
Alternative Packaging
1
$1.29
10
$1.10
25
$0.96
100
$0.859
500
View
500
$0.804
1,000
$0.726
2,100
$0.662
4,200
$0.637
Buy
Min.: 1 Mult.: 1
Details
CIP-51 8051
2 kB
256 B
QFN-20
25 MHz
12 bit
16 I/O
1.8 V
3.6 V
SMD/SMT
8 bit
- 40 C
+ 85 C
Tube
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:
$1.36
6,578 In Stock
9,000 Expected 01/09/2026
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 01/09/2026
Alternative Packaging
1
$1.36
10
$1.14
25
$0.98
100
$0.921
1,500
$0.662
3,000
View
250
$0.912
500
$0.807
1,000
$0.736
3,000
$0.637
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
1.8 V
3.6 V
SMD/SMT
8 bit
- 40 C
+ 85 C
Reel, Cut Tape, MouseReel
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:
$0.91
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
$0.91
10
$0.762
25
$0.66
100
$0.62
1,500
$0.456
3,000
View
500
$0.54
1,000
$0.498
3,000
$0.417
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
+ 85 C
EFM8BB1
Reel, Cut Tape, MouseReel
8-bit Microcontrollers - MCU 8051 25 MHz 64 kB flash 4 kB RAM 8-bit Sleepy Bee MCU
+1 image
EFM8SB20F64G-B-QFN32
Silicon Labs
1:
$4.50
1,161 In Stock
End of Life
Mouser Part No 634-EFM8SBF64GBQFN32
End of Life
Silicon Labs
8-bit Microcontrollers - MCU 8051 25 MHz 64 kB flash 4 kB RAM 8-bit Sleepy Bee MCU
1,161 In Stock
Alternative Packaging
1
$4.50
10
$2.98
25
$2.72
100
$2.31
250
View
250
$2.20
500
$1.97
1,000
$1.94
2,500
$1.64
4,599
$1.61
Buy
Min.: 1 Mult.: 1
Details
CIP-51 8051
64 kB
4.25 kB
QFN-32
25 MHz
10 bit
24 I/O
1.8 V
3.6 V
SMD/SMT
8 bit
- 40 C
+ 85 C
EFM8SB
Tube
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:
$1.11
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
$1.11
10
$0.946
25
$0.83
100
$0.762
2,500
$0.538
5,000
View
250
$0.709
500
$0.649
1,000
$0.594
5,000
$0.456
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 8 kB flash 0.5 kB RAM 8-bit Sleepy Bee MCU
+2 images
EFM8SB10F8G-A-QFN20
Silicon Labs
1:
$1.61
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
$1.61
10
$1.37
25
$1.20
100
$1.08
500
View
500
$1.01
1,000
$0.878
2,100
$0.816
4,200
$0.798
Buy
Min.: 1 Mult.: 1
Details
CIP-51 8051
8 kB
512 B
QFN-20
25 MHz
12 bit
16 I/O
1.8 V
3.6 V
SMD/SMT
8 bit
- 40 C
+ 85 C
Tube
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:
$1.20
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
$1.20
10
$1.03
25
$0.901
100
$0.833
250
View
250
$0.731
500
$0.692
1,008
$0.582
2,016
$0.53
5,040
$0.514
Buy
Min.: 1 Mult.: 1
Details
16 kB
512 B
SOIC-16
50 MHz
12 bit
12 I/O
1.8 V
5.5 V
SMD/SMT
8 bit
- 40 C
+ 85 C
BB50
Tube
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:
$1.24
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
$1.24
10
$1.06
25
$0.924
100
$0.853
250
View
250
$0.793
500
$0.727
1,008
$0.657
2,016
$0.609
5,040
$0.59
Buy
Min.: 1 Mult.: 1
Details
16 kB
512 B
SOIC-16
50 MHz
12 bit
12 I/O
1.8 V
5.5 V
SMD/SMT
8 bit
- 40 C
+ 125 C
BB50
Tube
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:
$1.01
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
$1.01
10
$0.864
25
$0.804
100
$0.717
250
View
250
$0.666
500
$0.604
1,008
$0.554
2,016
$0.504
5,040
$0.489
Buy
Min.: 1 Mult.: 1
Details
4 kB
512 B
SOIC-16
50 MHz
12 bit
12 I/O
1.8 V
5.5 V
SMD/SMT
8 bit
- 40 C
+ 125 C
BB50
Tube
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:
$1.11
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
$1.11
10
$0.946
25
$0.83
100
$0.762
250
View
250
$0.709
500
$0.649
1,008
$0.585
2,016
$0.541
5,040
$0.524
Buy
Min.: 1 Mult.: 1
Details
8 kB
512 B
SOIC-16
50 MHz
12 bit
12 I/O
1.8 V
5.5 V
SMD/SMT
8 bit
- 40 C
+ 85 C
Tube
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:
$1.70
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
$1.70
10
$1.41
25
$1.22
100
$1.15
1,500
$0.816
3,000
View
500
$1.01
1,000
$0.904
3,000
$0.798
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
1.8 V
3.6 V
SMD/SMT
8 bit
- 40 C
+ 85 C
Reel, Cut Tape, MouseReel
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:
$0.92
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 05/11/2026
52,500 Expected 10/11/2026
Factory Lead Time:
12 Weeks
1
$0.92
10
$0.779
100
$0.64
250
$0.598
500
View
1,500
$0.50
500
$0.528
1,000
$0.513
1,500
$0.50
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
+ 85 C
EFM8BB1
Reel, Cut Tape, MouseReel
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:
$0.78
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
$0.78
10
$0.67
25
$0.624
200
$0.589
600
View
600
$0.517
1,000
$0.464
2,600
$0.409
5,000
$0.374
Buy
Min.: 1 Mult.: 1
Details
4 kB
512 B
QFN-12
50 MHz
12 bit
9 I/O
1.8 V
5.5 V
SMD/SMT
8 bit
- 40 C
+ 85 C
BB50
Cut Tape
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:
$1.66
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
$1.66
10
$1.06
25
$0.942
100
$0.775
250
View
3,000
$0.469
250
$0.676
500
$0.64
1,000
$0.538
3,000
$0.469
Buy
Min.: 1 Mult.: 1
Reel :3,000
Details
16 kB
512 B
QFN-16
50 MHz
12 bit
12 I/O
1.8 V
5.5 V
SMD/SMT
8 bit
- 40 C
+ 85 C
BB50
Reel, Cut Tape, MouseReel
8-bit Microcontrollers - MCU 8051 25 MHz 8 kB flash 0.5 kB RAM 8-bit Sleepy Bee MCU
EFM8SB10F8G-A-QFN24R
Silicon Labs
1:
$1.80
3,031 In Stock
Mouser Part No 634-8SB10F8GAQF24R
Silicon Labs
8-bit Microcontrollers - MCU 8051 25 MHz 8 kB flash 0.5 kB RAM 8-bit Sleepy Bee MCU
3,031 In Stock
Alternative Packaging
1
$1.80
10
$1.50
25
$1.29
100
$1.22
1,500
$0.89
3,000
View
250
$1.20
500
$1.07
1,000
$0.949
3,000
$0.87
Buy
Min.: 1 Mult.: 1
Reel :1,500
Details
CIP-51 8051
8 kB
512 B
25 MHz
12 bit
17 I/O
1.8 V
3.6 V
SMD/SMT
8 bit
- 40 C
+ 85 C
Reel, Cut Tape, MouseReel
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:
$1.01
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
$1.01
10
$0.864
25
$0.804
100
$0.788
200
View
200
$0.642
600
$0.623
1,000
$0.553
2,600
$0.504
5,000
$0.489
Buy
Min.: 1 Mult.: 1
Details
16 kB
512 B
QFN-16
50 MHz
12 bit
12 I/O
1.8 V
5.5 V
SMD/SMT
8 bit
- 40 C
+ 85 C
BB50
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:
$1.04
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
$1.04
10
$0.887
25
$0.779
100
$0.693
200
View
200
$0.671
600
$0.589
1,000
$0.529
2,600
$0.454
5,000
$0.415
Buy
Min.: 1 Mult.: 1
Details
16 kB
512 B
QFN-12
50 MHz
12 bit
9 I/O
1.8 V
5.5 V
SMD/SMT
8 bit
- 40 C
+ 85 C
BB50
Cut Tape
8-bit Microcontrollers - MCU 2K FLASH 24MHZ SOIC
AT89S2051-24SU
Microchip Technology
1:
$2.61
504 In Stock
Mouser Part No 556-A89S2051-24SU
Microchip Technology
8-bit Microcontrollers - MCU 2K FLASH 24MHZ SOIC
504 In Stock
1
$2.61
25
$2.39
111
$2.18
Buy
Min.: 1 Mult.: 1
Details
8051
2 kB
256 B
SOIC-20
24 MHz
No ADC
15 I/O
2.7 V
5.5 V
SMD/SMT
8 bit
- 40 C
+ 85 C
89S
Tube
8-bit Microcontrollers - MCU 8051 25 MHz 16 kB flash 2 kB RAM 8-bit Universal Bee MCU
EFM8UB10F16G-C-QFN28R
Silicon Labs
1:
$2.71
4,493 In Stock
Mouser Part No 634-8UB10F16GCQFN28R
Silicon Labs
8-bit Microcontrollers - MCU 8051 25 MHz 16 kB flash 2 kB RAM 8-bit Universal Bee MCU
4,493 In Stock
Alternative Packaging
1
$2.71
10
$2.28
25
$2.00
100
$1.89
1,500
$1.30
3,000
View
250
$1.86
500
$1.65
1,000
$1.45
3,000
$1.26
Buy
Min.: 1 Mult.: 1
Reel :1,500
Details
CIP-51 8051
16 kB
2.25 kB
QFN-28
50 MHz
12 bit
22 I/O
2.2 V
3.6 V
SMD/SMT
8 bit
- 40 C
+ 85 C
EFM8UB
Reel, Cut Tape
8-bit Microcontrollers - MCU 8051 25 MHz 8 kB flash 0.5 kB RAM 8-bit Sleepy Bee MCU
+2 images
EFM8SB10F8G-A-CSP16R
Silicon Labs
1:
$1.96
2,678 In Stock
7,500 Expected 07/12/2026
Mouser Part No 634-8SB10F8GA-CSP16R
Silicon Labs
8-bit Microcontrollers - MCU 8051 25 MHz 8 kB flash 0.5 kB RAM 8-bit Sleepy Bee MCU
2,678 In Stock
7,500 Expected 07/12/2026
Alternative Packaging
1
$1.96
10
$1.62
25
$1.49
100
$1.32
250
View
2,500
$0.92
250
$1.22
500
$1.16
1,000
$1.08
2,500
$0.92
Buy
Min.: 1 Mult.: 1
Reel :2,500
Details
CIP-51 8051
8 kB
256 B
CSP-16
25 MHz
12 bit
13 I/O
3.6 V
2.2 V
SMD/SMT
8 bit
- 40 C
+ 85 C
Reel, Cut Tape, MouseReel
8-bit Microcontrollers - MCU 8051 75 MHz 32 kB flash 2.25 kB RAM 8-bit Laser Bee MCU
EFM8LB12F32E-C-QFN24R
Silicon Labs
1:
$4.08
980 In Stock
Mouser Part No 634-LB12F32ECQFN24R
Silicon Labs
8-bit Microcontrollers - MCU 8051 75 MHz 32 kB flash 2.25 kB RAM 8-bit Laser Bee MCU
980 In Stock
Alternative Packaging
1
$4.08
10
$2.70
25
$2.46
100
$2.09
1,500
$1.59
3,000
View
250
$1.99
500
$1.78
1,000
$1.67
3,000
$1.57
Buy
Min.: 1 Mult.: 1
Reel :1,500
Details
CIP-51 8051
32 kB
2.25 kB
QFN-24
72 MHz
10 bit/12 bit/14 bit
20 I/O
2.2 V
3.6 V
SMD/SMT
8 bit
- 40 C
+ 105 C
EFM8LB1
Reel, Cut Tape, MouseReel
8-bit Microcontrollers - MCU 8051 25 MHz 8 kB flash 2 kB RAM 8-bit Universal Bee MCU
+2 images
EFM8UB10F8G-C-QFN20
Silicon Labs
1:
$1.78
2,547 In Stock
5,040 Expected 11/09/2026
Mouser Part No 634-8UB10F8GCQFN20
Silicon Labs
8-bit Microcontrollers - MCU 8051 25 MHz 8 kB flash 2 kB RAM 8-bit Universal Bee MCU
2,547 In Stock
5,040 Expected 11/09/2026
Alternative Packaging
1
$1.78
10
$1.51
25
$1.32
100
$1.23
250
View
250
$1.20
500
$1.06
1,000
$0.982
2,520
$0.948
5,040
$0.934
Buy
Min.: 1 Mult.: 1
Details
CIP-51 8051
8 kB
2.25 kB
QFN-20
50 MHz
12 bit
13 I/O
2.2 V
3.6 V
SMD/SMT
8 bit
- 40 C
+ 85 C
EFM8UB
Tube
8-bit Microcontrollers - MCU 8051 50 MHz 16 kB flash 2.25 kB RAM 8-bit Busy Bee MCU
EFM8BB31F16G-D-QFN32R
Silicon Labs
1:
$1.86
4,177 In Stock
Mouser Part No 634-EF8BB31F16GDN32R
Silicon Labs
8-bit Microcontrollers - MCU 8051 50 MHz 16 kB flash 2.25 kB RAM 8-bit Busy Bee MCU
4,177 In Stock
Alternative Packaging
1
$1.86
10
$1.54
25
$1.33
100
$1.25
2,500
$0.945
5,000
View
500
$1.10
1,000
$1.03
5,000
$0.92
Buy
Min.: 1 Mult.: 1
Reel :2,500
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
+ 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-QFN24R
Silicon Labs
1:
$3.67
2,120 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
2,120 In Stock
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$1.64
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$1.32
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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
Israel