EFM8BB31F16G-D-QFN32

Product Overview

The EFM8BB31F16G-D-QFN32 is a Silicon Labs Busy Bee microcontroller built around a CIP-51 8051 core. It provides 8-bit processing at 50MHz, 16KB (16K x 8) of FLASH program memory, and 2.25K x 8 RAM. The device operates from a 2.2V to 3.6V supply and uses an internal oscillator, which can simplify clock circuitry in space-constrained embedded designs. With 29 I/O pins, mixed-signal conversion resources, and serial interfaces, it supports compact control and data-acquisition functions where a small 32-QFN (4x4) surface-mount package is required.

Key Features

• CIP-51 8051 8-bit core operating at 50MHz
• 16KB (16K x 8) FLASH program memory and 2.25K x 8 RAM
• 29 I/O pins with I2C, SMBus, SPI, and UART/USART connectivity
• A/D 20x12b and D/A 2x12b data converters
• Brown-out Detect/Reset, POR, PWM, and WDT peripherals
• 2.2V to 3.6V supply range and internal oscillator
• -40°C to 85°C (TA) operating temperature range
• 32-QFN (4x4) surface-mount package with exposed pad

Applications

• Embedded control subsystems requiring 8-bit processing and multiple serial interfaces
• Mixed-signal data acquisition modules using 12-bit analog-to-digital conversion
• Compact user interface or sensor node boards with 29 I/O pins
• PWM-based control functions in 2.2V to 3.6V embedded systems

Design & Procurement Notes

Design teams should consider the 32-QFN (4x4) surface-mount package and exposed pad when planning PCB land pattern, thermal relief, and assembly processes. The 2.2V to 3.6V supply range, internal oscillator, and 50MHz core speed define the basic electrical and timing envelope. The 29 I/O count, FLASH program memory size, RAM size, serial interfaces, and data converter resources should be mapped against the required system functions before selecting this Busy Bee device. The -40°C to 85°C (TA) operating range and the Brown-out Detect/Reset, POR, and WDT peripherals are relevant to embedded control designs.