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Silicon Labs 8-bit Microcontrollers - MCU

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Part #

8-bit Microcontrollers - MCU 8kB/768B RAM, QFN20 OTP available (T631-GM)

C8051F331-GMR
Silicon Labs
1: $9.02
1,500Expected 09/10/2026
End of Life

Mfr. Part No.
C8051F331-GMR

Mouser Part No
634-C8051F331-GMR

End of Life

Silicon Labs

8-bit Microcontrollers - MCU 8kB/768B RAM, QFN20 OTP available (T631-GM)

Datasheet

1,500Expected 09/10/2026

Cut Tape

$9.02

$6.99

$6.48

$6.20

Reel

$6.20

MouseReel Available

Min.: 1
Mult.: 1

: 1,500

8051

8 kB

768 B

QFN-20

25 MHz

No ADC

17 I/O

2.7 V

3.6 V

SMD/SMT

8 bit

- 40 C

+ 85 C

C8051F331

Reel, Cut Tape, MouseReel

8-bit Microcontrollers - MCU 8051 50 MHz 64 kB 5 V CAN LIN 8-bit MCU

C8051F508-IM
Silicon Labs
1: $13.64
370Expected 30/04/2027
End of Life

Mfr. Part No.
C8051F508-IM

Mouser Part No
634-C8051F508-IM

End of Life

Silicon Labs

8-bit Microcontrollers - MCU 8051 50 MHz 64 kB 5 V CAN LIN 8-bit MCU

Learn More

Datasheet

370Expected 30/04/2027

$13.64

$10.69

$9.95

$9.14

View

Min.: 1
Mult.: 1

8051

64 kB

4.25 kB

QFN-40

50 MHz

12 bit

33 I/O

1.8 V

5.25 V

SMD/SMT

8 bit

- 40 C

+ 125 C

C8051F508

AEC-Q100

Tube

8-bit Microcontrollers - MCU 8051 25 MHz 8 kB 5 V 8-bit MCU

C8051F531-C-IT
Silicon Labs
1: $7.25
1,551Expected 01/01/2027
End of Life

Mfr. Part No.
C8051F531-C-IT

Mouser Part No
634-C8051F531-C-IT

End of Life

Silicon Labs

8-bit Microcontrollers - MCU 8051 25 MHz 8 kB 5 V 8-bit MCU

Datasheet

1,551Expected 01/01/2027

$7.25

$5.77

$5.22

Min.: 1
Mult.: 1

8051

8 kB

256 B

TSSOP-20

25 MHz

12 bit

16 I/O

2 V

5.25 V

SMD/SMT

8 bit

- 40 C

+ 125 C

C8051F531

AEC-Q100

Tube

8-bit Microcontrollers - MCU 8051 50 MHz 128 kB 5 V CAN LIN 8-bit MCU

C8051F580-IM
Silicon Labs
1: $16.07
810Expected 29/01/2027
End of Life

Mfr. Part No.
C8051F580-IM

Mouser Part No
634-C8051F580-IM

End of Life

Silicon Labs

8-bit Microcontrollers - MCU 8051 50 MHz 128 kB 5 V CAN LIN 8-bit MCU

Learn More

Datasheet

810Expected 29/01/2027

$16.07

$14.15

$12.47

$11.03

Min.: 1
Mult.: 1

8051

128 kB

8.25 kB

QFN-48

24 MHz

12 bit

40 I/O

1.8 V

5.25 V

SMD/SMT

8 bit

- 40 C

+ 125 C

C8051F580

AEC-Q100

Tube

8-bit Microcontrollers - MCU 8051 25 MHz 8 kB flash 0.5 kB RAM 8-bit Sleepy Bee MCU

EFM8SB10F8G-A-CSP16
Silicon Labs
1: $1.90
1,400Expected 16/10/2026

Mfr. Part No.
EFM8SB10F8G-A-CSP16

Mouser Part No
634-8SB10F8G-A-CSP16

Silicon Labs

8-bit Microcontrollers - MCU 8051 25 MHz 8 kB flash 0.5 kB RAM 8-bit Sleepy Bee MCU

Learn More

Datasheet

1,400Expected 16/10/2026

$1.90

$1.48

$1.33

$1.18

View

Min.: 1
Mult.: 1

CIP-51 8051

8 kB

512 B

CSP-16

25 MHz

12 bit

13 I/O

1.8 V

3.6 V

SMD/SMT

8 bit

- 40 C

+ 85 C

Cut Tape

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

EFM8UB10F16G-C-QFN28
Silicon Labs
1: $2.71
526Expected 08/01/2027

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

526Expected 08/01/2027

$2.71

$2.28

$1.94

$1.84

$1.69

Min.: 1
Mult.: 1

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

Tube

8-bit Microcontrollers - MCU 5 Volt 8051 50 Mhz 32 kB flash 2.304 kB RAM 16 GPIO BB5 8-bit MCU

EFM8BB52F32G-C-TSSOP20
Silicon Labs
1: $1.32
197Expected 18/12/2026

Mfr. Part No.
EFM8BB52F32G-C-TSSOP20

Mouser Part No
634-EFM852F32GCTOP20

Silicon Labs

8-bit Microcontrollers - MCU 5 Volt 8051 50 Mhz 32 kB flash 2.304 kB RAM 16 GPIO BB5 8-bit MCU

Learn More

Datasheet

197Expected 18/12/2026

$1.32

$1.01

$0.901

$0.759

View

Min.: 1
Mult.: 1

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 8051 25 MHz 8 kB flash 0.5 kB RAM 8-bit Busy Bee MCU

EFM8BB10F8G-A-QFN20
Silicon Labs
1: $1.10
Non-Stocked Lead-Time 12 Weeks

Mfr. Part No.
EFM8BB10F8G-A-QFN20

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

Learn More

Datasheet

Non-Stocked Lead-Time 12 Weeks

$1.10

$0.869

$0.787

$0.717

View

Min.: 1
Mult.: 1

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: $0.671
Non-Stocked Lead-Time 12 Weeks

Mfr. Part No.
EFM8BB10F8I-A-SOIC16R

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

Learn More

Datasheet

Non-Stocked Lead-Time 12 Weeks

Reel

$0.671

$0.663

Min.: 2,500
Mult.: 2,500

: 2,500

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 4 kB flash 0.5 kB RAM 8-bit Sleepy Bee MCU

EFM8SB10F4G-A-QFN20R
Silicon Labs
1,500: $0.79
Non-Stocked Lead-Time 12 Weeks

Mfr. Part No.
EFM8SB10F4G-A-QFN20R

Mouser Part No
634-8SB10F4GAQF20R

Silicon Labs

8-bit Microcontrollers - MCU 8051 25 MHz 4 kB flash 0.5 kB RAM 8-bit Sleepy Bee MCU

Datasheet

Non-Stocked Lead-Time 12 Weeks

Reel

$0.79

$0.782

Min.: 1,500
Mult.: 1,500

: 1,500

CIP-51 8051

4 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

8-bit Microcontrollers - MCU 8051 25 MHz 8 kB flash 0.5 kB RAM 8-bit Sleepy Bee MCU

EFM8SB10F8G-A-QFN20
Silicon Labs
1: $1.61
Lead-Time 12 Weeks

Mfr. Part No.
EFM8SB10F8G-A-QFN20

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

Learn More

Datasheet

Lead-Time 12 Weeks

$1.61

$1.37

$1.20

$1.08

View

Min.: 1
Mult.: 1

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 8051 50 MHz 64 kB 8-bit MCU

C8051F342-GM
Silicon Labs
1,533: $15.17
Non-Stocked Lead-Time 12 Weeks

Mfr. Part No.
C8051F342-GM

Mouser Part No
634-C8051F342-GM

Silicon Labs

8-bit Microcontrollers - MCU 8051 50 MHz 64 kB 8-bit MCU

Learn More

Datasheet

Non-Stocked Lead-Time 12 Weeks

$15.17

View

Min.: 1,533
Mult.: 1,533

8051

64 kB

4.25 kB

QFN-32

48 MHz

10 bit

25 I/O

2.7 V

5.25 V

SMD/SMT

8 bit

- 40 C

+ 85 C

C8051F342

Tube

8-bit Microcontrollers - MCU Next gen available (F381-GM) 48 MIPS,64KB,10ADC,USB,32Pin

C8051F342-GMR
Silicon Labs
1,500: $15.73
Non-Stocked Lead-Time 12 Weeks

Mfr. Part No.
C8051F342-GMR

Mouser Part No
634-C8051F342-GMR

Silicon Labs

8-bit Microcontrollers - MCU Next gen available (F381-GM) 48 MIPS,64KB,10ADC,USB,32Pin

Learn More

Datasheet

Non-Stocked Lead-Time 12 Weeks

Reel

$15.73

Min.: 1,500
Mult.: 1,500

: 1,500

8051

2.7 V

5.25 V

8 bit

C8051F342

Reel

8-bit Microcontrollers - MCU 8051 25 MHz 64 kB 8-bit MCU

C8051F346-GM
Silicon Labs
1,533: $14.98
Non-Stocked Lead-Time 12 Weeks

Mfr. Part No.
C8051F346-GM

Mouser Part No
634-C8051F346-GM

Silicon Labs

8-bit Microcontrollers - MCU 8051 25 MHz 64 kB 8-bit MCU

Learn More

Datasheet

Non-Stocked Lead-Time 12 Weeks

$14.98

Quote

Min.: 1,533
Mult.: 1,533

8051

64 kB

4.25 kB

QFN-32

25 MHz

10 bit

25 I/O

2.7 V

5.25 V

SMD/SMT

8 bit

- 40 C

+ 85 C

C8051F346

Tube

8-bit Microcontrollers - MCU Next gen available (F381-GM) 25 MIPS,64KB,10ADC,USB,32Pin

C8051F346-GMR
Silicon Labs
1,500: $14.97
Non-Stocked Lead-Time 12 Weeks

Mfr. Part No.
C8051F346-GMR

Mouser Part No
634-C8051F346-GMR

Silicon Labs

8-bit Microcontrollers - MCU Next gen available (F381-GM) 25 MIPS,64KB,10ADC,USB,32Pin

Learn More

Datasheet

Non-Stocked Lead-Time 12 Weeks

Reel

$14.97

Min.: 1,500
Mult.: 1,500

: 1,500

C8051F346

Reel

8-bit Microcontrollers - MCU 8051 50 MHz 64 kB 8-bit MCU

C8051F34A-GM
Silicon Labs
1,533: $16.08
Non-Stocked Lead-Time 12 Weeks

Mfr. Part No.
C8051F34A-GM

Mouser Part No
634-C8051F34A-GM

Silicon Labs

8-bit Microcontrollers - MCU 8051 50 MHz 64 kB 8-bit MCU

Learn More

Datasheet

Non-Stocked Lead-Time 12 Weeks

$16.08

Quote

Min.: 1,533
Mult.: 1,533

8051

64 kB

4.25 kB

LQFP-32

25 MHz

10 bit

25 I/O

2.7 V

5.25 V

SMD/SMT

8 bit

- 40 C

+ 85 C

C8051F34A

Tube

8-bit Microcontrollers - MCU Next gen available (F381-GM) 48 MIPS,64KB,10ADC,2xUART, USB,32Pin

C8051F34A-GMR
Silicon Labs
1,500: $16.06
Non-Stocked Lead-Time 12 Weeks

Mfr. Part No.
C8051F34A-GMR

Mouser Part No
634-C8051F34A-GMR

Silicon Labs

8-bit Microcontrollers - MCU Next gen available (F381-GM) 48 MIPS,64KB,10ADC,2xUART, USB,32Pin

Learn More

Datasheet

Non-Stocked Lead-Time 12 Weeks

Reel

$16.06

Min.: 1,500
Mult.: 1,500

: 1,500

8051

2.7 V

5.25 V

8 bit

C8051F34A

Reel

8-bit Microcontrollers - MCU 8051 50 MHz 8 kB 8-bit MCU

C8051F353-GMR
Silicon Labs
1: $11.76
Non-Stocked Lead-Time 12 Weeks

Mfr. Part No.
C8051F353-GMR

Mouser Part No
634-C8051F353-GMR

Silicon Labs

8-bit Microcontrollers - MCU 8051 50 MHz 8 kB 8-bit MCU

Datasheet

Non-Stocked Lead-Time 12 Weeks

Cut Tape

$11.76

$9.19

$8.47

$7.83

View

Reel

$6.77

Min.: 1
Mult.: 1

: 1,500

8051

8 kB

768 B

QFN-28

50 MHz

16 bit

17 I/O

2.7 V

3.6 V

SMD/SMT

8 bit

- 40 C

+ 85 C

C8051F353

Reel, Cut Tape

8-bit Microcontrollers - MCU USB-Flash-32k-ADC-QFN32 OTP available (T627-GM)

C8051F383-GMR
Silicon Labs
1,500: $3.51
Non-Stocked Lead-Time 12 Weeks

Mfr. Part No.
C8051F383-GMR

Mouser Part No
634-C8051F383-GMR

Silicon Labs

8-bit Microcontrollers - MCU USB-Flash-32k-ADC-QFN32 OTP available (T627-GM)

Datasheet

Non-Stocked Lead-Time 12 Weeks

Reel

$3.51

Min.: 1,500
Mult.: 1,500

: 1,500

8051

32 kB

2.25 kB

QFN-32

48 MHz

10 bit

25 I/O

2.7 V

5.25 V

SMD/SMT

8 bit

- 40 C

+ 85 C

C8051F383

Reel

8-bit Microcontrollers - MCU USB-Flash-64k-QFN32 OTP available (T626-GM)

C8051F385-GMR
Silicon Labs
1,500: $3.97
Non-Stocked Lead-Time 12 Weeks

Mfr. Part No.
C8051F385-GMR

Mouser Part No
634-C8051F385-GMR

Silicon Labs

8-bit Microcontrollers - MCU USB-Flash-64k-QFN32 OTP available (T626-GM)

Datasheet

Non-Stocked Lead-Time 12 Weeks

Reel

$3.97

Min.: 1,500
Mult.: 1,500

: 1,500

8051

64 kB

4.35 kB

QFN-32

48 MHz

25 I/O

2.7 V

5.25 V

SMD/SMT

8 bit

- 40 C

+ 85 C

C8051F385

Reel

8-bit Microcontrollers - MCU USB-Flash-32k-QFN32 OTP available (T627-GM)

C8051F387-GMR
Silicon Labs
1,500: $3.35
Non-Stocked Lead-Time 12 Weeks

Mfr. Part No.
C8051F387-GMR

Mouser Part No
634-C8051F387-GMR

Silicon Labs

8-bit Microcontrollers - MCU USB-Flash-32k-QFN32 OTP available (T627-GM)

Datasheet

Non-Stocked Lead-Time 12 Weeks

Reel

$3.35

Min.: 1,500
Mult.: 1,500

: 1,500

8051

32 kB

2.3 kB

QFN-32

48 MHz

25 I/O

2.7 V

5.25 V

SMD/SMT

8 bit

- 40 C

+ 85 C

C8051F387

Reel

8-bit Microcontrollers - MCU 8051 50 MHz 16 kB 8-bit MCU

C8051F38C-GM
Silicon Labs
1: $4.92
Non-Stocked Lead-Time 12 Weeks

Mfr. Part No.
C8051F38C-GM

Mouser Part No
634-C8051F38C-GM

Silicon Labs

8-bit Microcontrollers - MCU 8051 50 MHz 16 kB 8-bit MCU

Learn More

Datasheet

Non-Stocked Lead-Time 12 Weeks

$4.92

$3.88

$3.45

$3.19

View

Min.: 1
Mult.: 1

8051

16 kB

2.25 kB

QFN-32

48 MHz

10 bit

25 I/O

2.7 V

5.25 V

SMD/SMT

8 bit

- 40 C

+ 85 C

C8051F38C

Tube

8-bit Microcontrollers - MCU USB-Flash-16k-ADC-QFN32

C8051F38C-GMR
Silicon Labs
1: $4.81
Non-Stocked Lead-Time 12 Weeks

Mfr. Part No.
C8051F38C-GMR

Mouser Part No
634-C8051F38C-GMR

Silicon Labs

8-bit Microcontrollers - MCU USB-Flash-16k-ADC-QFN32

Datasheet

Non-Stocked Lead-Time 12 Weeks

Cut Tape

$4.81

$3.63

$3.33

$3.01

View

Reel

$2.77

Min.: 1
Mult.: 1

: 1,500

C8051F38C

Reel, Cut Tape

8-bit Microcontrollers - MCU 8051 50 MHz 16 kB LFO 8-bit MCU

C8051F391-A-GM
Silicon Labs
1,911: $2.26
Non-Stocked Lead-Time 12 Weeks

Mfr. Part No.
C8051F391-A-GM

Mouser Part No
634-C8051F391-A-GM

Silicon Labs

8-bit Microcontrollers - MCU 8051 50 MHz 16 kB LFO 8-bit MCU

Learn More

Datasheet

Non-Stocked Lead-Time 12 Weeks

$2.26

Min.: 1,911
Mult.: 1,911

8051

16 kB

1 kB

QFN-24

50 MHz

1.8 V

3.6 V

SMD/SMT

8 bit

- 40 C

+ 105 C

C8051F391

Tube

8-bit Microcontrollers - MCU 16kB/1kB RAM, QFN24

C8051F391-A-GMR
Silicon Labs
1,500: $2.26
Non-Stocked Lead-Time 12 Weeks

Mfr. Part No.
C8051F391-A-GMR

Mouser Part No
634-C8051F391-A-GMR

Silicon Labs

8-bit Microcontrollers - MCU 16kB/1kB RAM, QFN24

Datasheet

Non-Stocked Lead-Time 12 Weeks

Reel

$2.26

Min.: 1,500
Mult.: 1,500

: 1,500

C8051F391

Reel

Silicon Labs 8-bit Microcontrollers - MCU

Customer Service Office

Company

Resources

Support

CSP-16
LQFP-32
QFN-11
QFN-12
QFN-16
QFN-20
QFN-24
QFN-28
QFN-32
QFN-40
QFN-48
QFP-32
QSOP-24
SOIC-14
SOIC-16
TQFP-100
TQFP-48
TQFP-64
TQFP-80
TSSOP-20

6 I/O
8 I/O
9 I/O
12 I/O
13 I/O
15 I/O
16 I/O
17 I/O
18 I/O
20 I/O
21 I/O
22 I/O
24 I/O
25 I/O
28 I/O
29 I/O
32 I/O
33 I/O
40 I/O
57 I/O

BB50
C8051F005
C8051F018
C8051F019
C8051F020
C8051F021
C8051F022
C8051F043
C8051F120
C8051F122
C8051F124
C8051F126
C8051F130
C8051F132
C8051F300
C8051F301
C8051F302
C8051F303
C8051F304
C8051F305