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Total Products: 236,805
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Sheet		Part NumberManufacturerDescriptionCategoryDevice PackageVoltageOperating
Temp		Additional SpecificationsQtyGet A
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EFM8BB31F32I-B-5QFN32
EFM8BB31F32I-B-5QFN32Silicon LabsIC MCU 8BIT 32KB FLASH 32QFNMicrocontrollers32-QFN (5x5)N/A-40°C ~ 125°C (TA)
Core Processor:
CIP-51 8051
Core Size:
8-Bit
Speed:
50MHz
Connectivity:
I2C, SMBus, SPI, UART/USART
Peripherals:
Brown-out Detect/Reset, POR, PWM, WDT
Number of I/O:
29
Program Memory Size:
32KB (32K x 8)
Program Memory Type:
FLASH
RAM Size:
2.25K x 8
Voltage – Supply (Vcc/Vdd):
2.2V ~ 3.6V
Data Converters:
A/D 20×10/12b SAR; D/A 2x12b
Oscillator Type:
Internal
Operating Temperature:
-40°C ~ 125°C (TA)
Mounting Type:
Surface Mount
Supplier Device Package:
32-QFN (5×5)
Package / Case:
32-WFQFN Exposed Pad
958
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EFM8BB31F32I-B-5QFN32R
EFM8BB31F32I-B-5QFN32RSilicon LabsIC MCU 8BIT 32KB FLASH 32QFNMicrocontrollers32-QFN (5x5)N/A-40°C ~ 125°C (TA)
Core Processor:
CIP-51 8051
Core Size:
8-Bit
Speed:
50MHz
Connectivity:
I2C, SMBus, SPI, UART/USART
Peripherals:
Brown-out Detect/Reset, POR, PWM, WDT
Number of I/O:
29
Program Memory Size:
32KB (32K x 8)
Program Memory Type:
FLASH
RAM Size:
2.25K x 8
Voltage – Supply (Vcc/Vdd):
2.2V ~ 3.6V
Data Converters:
A/D 20×10/12b SAR; D/A 2x12b
Oscillator Type:
Internal
Operating Temperature:
-40°C ~ 125°C (TA)
Mounting Type:
Surface Mount
Supplier Device Package:
32-QFN (5×5)
Package / Case:
32-WFQFN Exposed Pad
1,007
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EFM8BB31F32I-B-QFN24
EFM8BB31F32I-B-QFN24Silicon LabsIC MCU 8BIT 32KB FLASH 24QFNMicrocontrollers24-QFN (3x3)N/A-40°C ~ 125°C (TA)
Core Processor:
CIP-51 8051
Core Size:
8-Bit
Speed:
50MHz
Connectivity:
I2C, SMBus, SPI, UART/USART
Peripherals:
Brown-out Detect/Reset, POR, PWM, WDT
Number of I/O:
20
Program Memory Size:
32KB (32K x 8)
Program Memory Type:
FLASH
RAM Size:
2.25K x 8
Voltage – Supply (Vcc/Vdd):
2.2V ~ 3.6V
Data Converters:
A/D 12×10/12b SAR; D/A 2x12b
Oscillator Type:
Internal
Operating Temperature:
-40°C ~ 125°C (TA)
Mounting Type:
Surface Mount
Supplier Device Package:
24-QFN (3×3)
Package / Case:
24-VFQFN Exposed Pad
1,131
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EFM8BB31F32I-B-QFN24R
EFM8BB31F32I-B-QFN24RSilicon LabsIC MCU 8BIT 32KB FLASH 24QFNMicrocontrollers24-QFN (3x3)N/A-40°C ~ 125°C (TA)
Core Processor:
CIP-51 8051
Core Size:
8-Bit
Speed:
50MHz
Connectivity:
I2C, SMBus, SPI, UART/USART
Peripherals:
Brown-out Detect/Reset, POR, PWM, WDT
Number of I/O:
20
Program Memory Size:
32KB (32K x 8)
Program Memory Type:
FLASH
RAM Size:
2.25K x 8
Voltage – Supply (Vcc/Vdd):
2.2V ~ 3.6V
Data Converters:
A/D 12×10/12b SAR; D/A 2x12b
Oscillator Type:
Internal
Operating Temperature:
-40°C ~ 125°C (TA)
Mounting Type:
Surface Mount
Supplier Device Package:
24-QFN (3×3)
Package / Case:
24-VFQFN Exposed Pad
394
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EFM8BB31F32I-B-QFN32
EFM8BB31F32I-B-QFN32Silicon LabsIC MCU 8BIT 32KB FLASH 32QFNMicrocontrollers32-QFN (4x4)N/A-40°C ~ 125°C (TA)
Core Processor:
CIP-51 8051
Core Size:
8-Bit
Speed:
50MHz
Connectivity:
I2C, SMBus, SPI, UART/USART
Peripherals:
Brown-out Detect/Reset, POR, PWM, WDT
Number of I/O:
29
Program Memory Size:
32KB (32K x 8)
Program Memory Type:
FLASH
RAM Size:
2.25K x 8
Voltage – Supply (Vcc/Vdd):
2.2V ~ 3.6V
Data Converters:
A/D 20×10/12b SAR; D/A 2x12b
Oscillator Type:
Internal
Operating Temperature:
-40°C ~ 125°C (TA)
Mounting Type:
Surface Mount
Supplier Device Package:
32-QFN (4×4)
Package / Case:
32-UFQFN Exposed Pad
971
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EFM8BB31F32I-B-QFN32R
EFM8BB31F32I-B-QFN32RSilicon LabsIC MCU 8BIT 32KB FLASH 32QFNMicrocontrollers32-QFN (4x4)N/A-40°C ~ 125°C (TA)
Core Processor:
CIP-51 8051
Core Size:
8-Bit
Speed:
50MHz
Connectivity:
I2C, SMBus, SPI, UART/USART
Peripherals:
Brown-out Detect/Reset, POR, PWM, WDT
Number of I/O:
29
Program Memory Size:
32KB (32K x 8)
Program Memory Type:
FLASH
RAM Size:
2.25K x 8
Voltage – Supply (Vcc/Vdd):
2.2V ~ 3.6V
Data Converters:
A/D 20×10/12b SAR; D/A 2x12b
Oscillator Type:
Internal
Operating Temperature:
-40°C ~ 125°C (TA)
Mounting Type:
Surface Mount
Supplier Device Package:
32-QFN (4×4)
Package / Case:
32-UFQFN Exposed Pad
773
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EFM8BB31F32I-B-QFP32
EFM8BB31F32I-B-QFP32Silicon LabsIC MCU 8BIT 32KB FLASH 32QFPMicrocontrollers32-QFP (7x7)N/A-40°C ~ 125°C (TA)
Core Processor:
CIP-51 8051
Core Size:
8-Bit
Speed:
50MHz
Connectivity:
I2C, SMBus, SPI, UART/USART
Peripherals:
Brown-out Detect/Reset, POR, PWM, WDT
Number of I/O:
28
Program Memory Size:
32KB (32K x 8)
Program Memory Type:
FLASH
RAM Size:
2.25K x 8
Voltage – Supply (Vcc/Vdd):
2.2V ~ 3.6V
Data Converters:
A/D 20×10/12b SAR; D/A 2x12b
Oscillator Type:
Internal
Operating Temperature:
-40°C ~ 125°C (TA)
Mounting Type:
Surface Mount
Supplier Device Package:
32-QFP (7×7)
Package / Case:
32-TQFP
838
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EFM8BB31F32I-B-QFP32R
EFM8BB31F32I-B-QFP32RSilicon LabsIC MCU 8BIT 32KB FLASH 32QFPMicrocontrollers32-QFP (7x7)N/A-40°C ~ 125°C (TA)
Core Processor:
CIP-51 8051
Core Size:
8-Bit
Speed:
50MHz
Connectivity:
I2C, SMBus, SPI, UART/USART
Peripherals:
Brown-out Detect/Reset, POR, PWM, WDT
Number of I/O:
28
Program Memory Size:
32KB (32K x 8)
Program Memory Type:
FLASH
RAM Size:
2.25K x 8
Voltage – Supply (Vcc/Vdd):
2.2V ~ 3.6V
Data Converters:
A/D 20×10/12b SAR; D/A 2x12b
Oscillator Type:
Internal
Operating Temperature:
-40°C ~ 125°C (TA)
Mounting Type:
Surface Mount
Supplier Device Package:
32-QFP (7×7)
Package / Case:
32-TQFP
1,432
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EFM8BB31F32I-B-QSOP24R
EFM8BB31F32I-B-QSOP24RSilicon LabsIC MCU 8BIT 32KB FLASH 24QSOPMicrocontrollers24-QSOPN/A-40°C ~ 125°C (TA)
Core Processor:
CIP-51 8051
Core Size:
8-Bit
Speed:
50MHz
Connectivity:
I2C, SMBus, SPI, UART/USART
Peripherals:
Brown-out Detect/Reset, POR, PWM, WDT
Number of I/O:
21
Program Memory Size:
32KB (32K x 8)
Program Memory Type:
FLASH
RAM Size:
2.25K x 8
Voltage – Supply (Vcc/Vdd):
2.2V ~ 3.6V
Data Converters:
A/D 13×10/12b SAR; D/A 2x12b
Oscillator Type:
Internal
Operating Temperature:
-40°C ~ 125°C (TA)
Mounting Type:
Surface Mount
Supplier Device Package:
24-QSOP
Package / Case:
24-SSOP (0.154″”, 3.90mm Width)
1,473
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EFM8BB31F32I-C-4QFN24
EFM8BB31F32I-C-4QFN24Silicon LabsIC MCU 8BIT 32KB FLASH 24QFNMicrocontrollers24-QFN (4x4)N/A-40°C ~ 125°C (TA)
Core Processor:
CIP-51 8051
Core Size:
8-Bit
Speed:
50MHz
Connectivity:
I2C, SMBus, SPI, UART/USART
Peripherals:
Brown-out Detect/Reset, POR, PWM, WDT
Number of I/O:
20
Program Memory Size:
32KB (32K x 8)
Program Memory Type:
FLASH
RAM Size:
2.25K x 8
Voltage – Supply (Vcc/Vdd):
2.2V ~ 3.6V
Data Converters:
A/D 12×10/12b SAR; D/A 2x12b
Oscillator Type:
Internal
Operating Temperature:
-40°C ~ 125°C (TA)
Mounting Type:
Surface Mount
Supplier Device Package:
24-QFN (4×4)
Package / Case:
24-WFQFN Exposed Pad
528
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EFM8BB31F32I-C-4QFN24R
EFM8BB31F32I-C-4QFN24RSilicon LabsIC MCU 8BIT 32KB FLASH 24QFNMicrocontrollers24-QFN (4x4)N/A-40°C ~ 125°C (TA)
Core Processor:
CIP-51 8051
Core Size:
8-Bit
Speed:
50MHz
Connectivity:
I2C, SMBus, SPI, UART/USART
Peripherals:
Brown-out Detect/Reset, POR, PWM, WDT
Number of I/O:
20
Program Memory Size:
32KB (32K x 8)
Program Memory Type:
FLASH
RAM Size:
2.25K x 8
Voltage – Supply (Vcc/Vdd):
2.2V ~ 3.6V
Data Converters:
A/D 12×10/12b SAR; D/A 2x12b
Oscillator Type:
Internal
Operating Temperature:
-40°C ~ 125°C (TA)
Mounting Type:
Surface Mount
Supplier Device Package:
24-QFN (4×4)
Package / Case:
24-WFQFN Exposed Pad
1,232
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EFM8BB31F32I-C-5QFN32
EFM8BB31F32I-C-5QFN32Silicon LabsIC MCU 8BIT 32KB FLASH 32QFNMicrocontrollers32-QFN (5x5)N/A-40°C ~ 125°C (TA)
Core Processor:
CIP-51 8051
Core Size:
8-Bit
Speed:
50MHz
Connectivity:
I2C, SMBus, SPI, UART/USART
Peripherals:
Brown-out Detect/Reset, POR, PWM, WDT
Number of I/O:
29
Program Memory Size:
32KB (32K x 8)
Program Memory Type:
FLASH
RAM Size:
2.25K x 8
Voltage – Supply (Vcc/Vdd):
2.2V ~ 3.6V
Data Converters:
A/D 20×10/12b SAR; D/A 2x12b
Oscillator Type:
Internal
Operating Temperature:
-40°C ~ 125°C (TA)
Mounting Type:
Surface Mount
Supplier Device Package:
32-QFN (5×5)
Package / Case:
32-WFQFN Exposed Pad
1,011
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EFM8BB31F32I-C-5QFN32R
EFM8BB31F32I-C-5QFN32RSilicon LabsIC MCU 8BIT 32KB FLASH 32QFNMicrocontrollers32-QFN (5x5)N/A-40°C ~ 125°C (TA)
Core Processor:
CIP-51 8051
Core Size:
8-Bit
Speed:
50MHz
Connectivity:
I2C, SMBus, SPI, UART/USART
Peripherals:
Brown-out Detect/Reset, POR, PWM, WDT
Number of I/O:
29
Program Memory Size:
32KB (32K x 8)
Program Memory Type:
FLASH
RAM Size:
2.25K x 8
Voltage – Supply (Vcc/Vdd):
2.2V ~ 3.6V
Data Converters:
A/D 20×10/12b SAR; D/A 2x12b
Oscillator Type:
Internal
Operating Temperature:
-40°C ~ 125°C (TA)
Mounting Type:
Surface Mount
Supplier Device Package:
32-QFN (5×5)
Package / Case:
32-WFQFN Exposed Pad
1,408
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EFM8BB31F32I-C-QFN24
EFM8BB31F32I-C-QFN24Silicon LabsIC MCU 8BIT 32KB FLASH 24QFNMicrocontrollers24-QFN (3x3)N/A-40°C ~ 125°C (TA)
Core Processor:
CIP-51 8051
Core Size:
8-Bit
Speed:
50MHz
Connectivity:
I2C, SMBus, SPI, UART/USART
Peripherals:
Brown-out Detect/Reset, POR, PWM, WDT
Number of I/O:
20
Program Memory Size:
32KB (32K x 8)
Program Memory Type:
FLASH
RAM Size:
2.25K x 8
Voltage – Supply (Vcc/Vdd):
2.2V ~ 3.6V
Data Converters:
A/D 12×10/12b SAR; D/A 2x12b
Oscillator Type:
Internal
Operating Temperature:
-40°C ~ 125°C (TA)
Mounting Type:
Surface Mount
Supplier Device Package:
24-QFN (3×3)
Package / Case:
24-VFQFN Exposed Pad
226
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EFM8BB31F32I-C-QFN24R
EFM8BB31F32I-C-QFN24RSilicon LabsIC MCU 8BIT 32KB FLASH 24QFNMicrocontrollers24-QFN (3x3)N/A-40°C ~ 125°C (TA)
Core Processor:
CIP-51 8051
Core Size:
8-Bit
Speed:
50MHz
Connectivity:
I2C, SMBus, SPI, UART/USART
Peripherals:
Brown-out Detect/Reset, POR, PWM, WDT
Number of I/O:
20
Program Memory Size:
32KB (32K x 8)
Program Memory Type:
FLASH
RAM Size:
2.25K x 8
Voltage – Supply (Vcc/Vdd):
2.2V ~ 3.6V
Data Converters:
A/D 12×10/12b SAR; D/A 2x12b
Oscillator Type:
Internal
Operating Temperature:
-40°C ~ 125°C (TA)
Mounting Type:
Surface Mount
Supplier Device Package:
24-QFN (3×3)
Package / Case:
24-VFQFN Exposed Pad
342
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EFM8BB31F32I-C-QFN32
EFM8BB31F32I-C-QFN32Silicon LabsIC MCU 8BIT 32KB FLASH 32QFNMicrocontrollers32-QFN (4x4)N/A-40°C ~ 125°C (TA)
Core Processor:
CIP-51 8051
Core Size:
8-Bit
Speed:
50MHz
Connectivity:
I2C, SMBus, SPI, UART/USART
Peripherals:
Brown-out Detect/Reset, POR, PWM, WDT
Number of I/O:
29
Program Memory Size:
32KB (32K x 8)
Program Memory Type:
FLASH
RAM Size:
2.25K x 8
Voltage – Supply (Vcc/Vdd):
2.2V ~ 3.6V
Data Converters:
A/D 20×10/12b SAR; D/A 2x12b
Oscillator Type:
Internal
Operating Temperature:
-40°C ~ 125°C (TA)
Mounting Type:
Surface Mount
Supplier Device Package:
32-QFN (4×4)
Package / Case:
32-UFQFN Exposed Pad
1,769
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EFM8BB31F32I-C-QFN32R
EFM8BB31F32I-C-QFN32RSilicon LabsIC MCU 8BIT 32KB FLASH 32QFNMicrocontrollers32-QFN (4x4)N/A-40°C ~ 125°C (TA)
Core Processor:
CIP-51 8051
Core Size:
8-Bit
Speed:
50MHz
Connectivity:
I2C, SMBus, SPI, UART/USART
Peripherals:
Brown-out Detect/Reset, POR, PWM, WDT
Number of I/O:
29
Program Memory Size:
32KB (32K x 8)
Program Memory Type:
FLASH
RAM Size:
2.25K x 8
Voltage – Supply (Vcc/Vdd):
2.2V ~ 3.6V
Data Converters:
A/D 20×10/12b SAR; D/A 2x12b
Oscillator Type:
Internal
Operating Temperature:
-40°C ~ 125°C (TA)
Mounting Type:
Surface Mount
Supplier Device Package:
32-QFN (4×4)
Package / Case:
32-UFQFN Exposed Pad
186
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EFM8BB31F32I-C-QFP32
EFM8BB31F32I-C-QFP32Silicon LabsIC MCU 8BIT 32KB FLASH 32QFPMicrocontrollers32-QFP (7x7)N/A-40°C ~ 125°C (TA)
Core Processor:
CIP-51 8051
Core Size:
8-Bit
Speed:
50MHz
Connectivity:
I2C, SMBus, SPI, UART/USART
Peripherals:
Brown-out Detect/Reset, POR, PWM, WDT
Number of I/O:
28
Program Memory Size:
32KB (32K x 8)
Program Memory Type:
FLASH
RAM Size:
2.25K x 8
Voltage – Supply (Vcc/Vdd):
2.2V ~ 3.6V
Data Converters:
A/D 20×10/12b SAR; D/A 2x12b
Oscillator Type:
Internal
Operating Temperature:
-40°C ~ 125°C (TA)
Mounting Type:
Surface Mount
Supplier Device Package:
32-QFP (7×7)
Package / Case:
32-TQFP
1,255
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EFM8BB31F32I-C-QFP32R
EFM8BB31F32I-C-QFP32RSilicon LabsIC MCU 8BIT 32KB FLASH 32QFPMicrocontrollers32-QFP (7x7)N/A-40°C ~ 125°C (TA)
Core Processor:
CIP-51 8051
Core Size:
8-Bit
Speed:
50MHz
Connectivity:
I2C, SMBus, SPI, UART/USART
Peripherals:
Brown-out Detect/Reset, POR, PWM, WDT
Number of I/O:
28
Program Memory Size:
32KB (32K x 8)
Program Memory Type:
FLASH
RAM Size:
2.25K x 8
Voltage – Supply (Vcc/Vdd):
2.2V ~ 3.6V
Data Converters:
A/D 20×10/12b SAR; D/A 2x12b
Oscillator Type:
Internal
Operating Temperature:
-40°C ~ 125°C (TA)
Mounting Type:
Surface Mount
Supplier Device Package:
32-QFP (7×7)
Package / Case:
32-TQFP
164
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EFM8BB31F32I-C-QSOP24
EFM8BB31F32I-C-QSOP24Silicon LabsIC MCU 8BIT 32KB FLASH 24QSOPMicrocontrollers24-QSOPN/A-40°C ~ 125°C (TA)
Core Processor:
CIP-51 8051
Core Size:
8-Bit
Speed:
50MHz
Connectivity:
I2C, SMBus, SPI, UART/USART
Peripherals:
Brown-out Detect/Reset, POR, PWM, WDT
Number of I/O:
21
Program Memory Size:
32KB (32K x 8)
Program Memory Type:
FLASH
RAM Size:
2.25K x 8
Voltage – Supply (Vcc/Vdd):
2.2V ~ 3.6V
Data Converters:
A/D 13×10/12b SAR; D/A 2x12b
Oscillator Type:
Internal
Operating Temperature:
-40°C ~ 125°C (TA)
Mounting Type:
Surface Mount
Supplier Device Package:
24-QSOP
Package / Case:
24-SSOP (0.154″”, 3.90mm Width)
884
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