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EFM8BB31F32I-B-QFN32R – Silicon Labs

Disclaimer: The image displayed serves as a mere illustration and does not provide precise specifications. For accurate details, We recommend referring to the official product data sheet.


In stock

Manufacturer Silicon Labs
Manufacturer Part No.EFM8BB31F32I-B-QFN32R – Silicon Labs
DescriptionIC MCU 8BIT 32KB FLASH 32QFN
Detailed DescriptionCIP-51 8051 Busy Bee Microcontroller IC 8-Bit 50MHz 32KB (32K x 8) FLASH 32-QFN (4x4)
DatasheetDatasheet Link

Key Stats

71% Customers retention rate

Customers from 12 countries

6 Industries

Product Attributes

TypeIntegrated Circuits (ICs)
CategoryEmbedded Microcontrollers
ManufacturerSilicon Labs
SeriesBusy Bee
Product StatusDiscontinued at Digi-Key
Matkronics ProgrammableNot Verified
Core ProcessorCIP-51 8051
Core Size8-Bit
ConnectivityI2C, SMBus, SPI, UART/USART
PeripheralsBrown-out Detect/Reset, POR, PWM, WDT
Number of I/O29
Program Memory Size32KB (32K x 8)
Program Memory TypeFLASH
EEPROM SizeNot specified
RAM Size2.25K x 8
Voltage – Supply (Vcc/Vdd)2.2V ~ 3.6V
Data ConvertersA/D 20×10/12b SAR; D/A 2x12b
Oscillator TypeInternal
Operating Temperature-40°C ~ 125°C (TA)
Mounting TypeSurface Mount
Package / Case32-UFQFN Exposed Pad
Supplier Device Package32-QFN (4×4)
Base Product NumberEFM8BB31

Product Information

Semiconductor Product Description: EFM8BB31F32I-B-QFN32R

The EFM8BB31F32I-B-QFN32R is a high-performance 8-bit microcontroller from Silicon Labs, designed for a wide range of applications in the electronics industry. This semiconductor product offers a unique combination of features and benefits that set it apart from other microcontrollers in the market.

Key Features:

  • 32-bit ARM Cortex-M0+ core for fast and efficient processing
  • 32 KB flash memory and 4 KB RAM for storing and executing code
  • Integrated peripherals including UART, SPI, I2C, and GPIO for versatile connectivity
  • Low power consumption for extended battery life in portable devices
  • High-speed analog-to-digital converter (ADC) for accurate sensor data acquisition

Key Benefits:

  • Improved system performance and responsiveness
  • Reduced development time and cost with integrated peripherals
  • Enhanced energy efficiency for IoT and wearable applications
  • Precise measurement and control capabilities for industrial automation
  • Reliable operation in harsh environments with robust design


The EFM8BB31F32I-B-QFN32R is ideal for a wide range of applications, including but not limited to:

  • Smart home devices
  • Automotive electronics
  • Medical devices
  • Industrial control systems
  • Consumer electronics

Overall, the EFM8BB31F32I-B-QFN32R stands out in the market for its advanced features, high performance, and versatility, making it a top choice for engineers and developers looking to create innovative and reliable electronic products.

Additional Info

Type Integrated Circuits (ICs) Category Embedded Microcontrollers Manufacturer Silicon Labs Series Busy Bee Package Tray Product Status Discontinued at Digi-Key Matkronics Programmable Not Verified 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) […]

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