EFM8UB20F32G-B-QFN32R

Product Overview

The EFM8UB20F32G-B-QFN32R from Silicon Labs is an 8-bit Universal Bee microcontroller built around the CIP-51 8051 core and rated for operation at 48MHz. It provides 32KB (32K x 8) of FLASH program memory, 2.25K x 8 of RAM, and 25 I/O pins in a 32-QFN (5x5) surface-mount package with an exposed pad. The device supports a 2.65V ~ 3.6V supply range and an operating temperature range of -40°C ~ 85°C (TA). It includes an internal oscillator and reset-related peripherals. The supplied lifecycle status is Active.

Key Features

• CIP-51 8051 8-bit core operating at 48MHz
• 32KB (32K x 8) FLASH program memory and 2.25K x 8 RAM
• 25 I/O pins
• I2C, SMBus, SPI, UART/USART, and USB connectivity
• Brown-out Detect/Reset, POR, PWM, and WDT peripherals
• 20x10-bit analog-to-digital conversion capability
• Internal oscillator
• 2.65V ~ 3.6V supply range and -40°C ~ 85°C (TA) operating temperature
• 32-QFN (5x5) surface-mount package with exposed pad

Applications

• USB-connected embedded control and human-interface applications
• Sensor-acquisition nodes using the analog-to-digital inputs
• Embedded PWM-based control interfaces
• Serial communication interfaces using UART/USART, SPI, I2C, or SMBus

Design & Procurement Notes

Designers selecting this device should confirm that the 2.65V ~ 3.6V supply range matches the system rail and that the 32-QFN (5x5) exposed-pad package is compatible with the intended surface-mount assembly and thermal plan. The 25 I/O count, 20x10-bit analog-to-digital capability, and available serial interfaces define the peripheral budget for the application, while the internal oscillator should be evaluated against timing accuracy requirements. The specified -40°C ~ 85°C (TA) operating range and Active lifecycle status should be checked against environmental and production planning needs.