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EFM8BB21F16G-C-QFN20R

SiLEFM8BB21F16G-C-QFN20R

Silicon Labs
CIP-51 8051 Busy Bee Microcontroller IC 8-Bit 50MHz 16KB (16K x 8) FLASH 20-QFN (3x3)
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Overview

The EFM8BB21F16G-C-QFN20R is a high-performance 8-bit microcontroller from the Busy Bee family, featuring a pipelined CIP-51 core capable of 50MHz operation. This AEC-Q100 qualified MCU integrates a 12-bit ADC, internal oscillators with 1.5 percent accuracy, and a flexible peripheral crossbar for efficient pin mapping in space-constrained designs. It is designed for general-purpose applications requiring a balance of high-speed processing and low power consumption.

Why Choose This Part

The MCU offers a significant performance boost over standard 8051 architectures with its 50MHz core and deterministic execution. It reduces BOM costs by integrating a 5V-to-3.3V LDO, precise internal oscillators, and a peripheral crossbar that simplifies PCB routing by allowing digital peripherals to be assigned to any I/O pin.

Applications

Automotive Body Control
Utilizing its AEC-Q100 qualification for climate control, window lift, and seat adjustment modules.
Sensor Interface
High-speed 12-bit ADC and 50MHz core allow for rapid processing of analog sensor data in industrial environments.
Motor Control
Integrated PWM peripherals and high clock speeds support precise control algorithms for small DC motors.
Consumer Electronics
Ideal for battery-powered devices due to its 0.2 uA shutdown current and small 3x3mm QFN package.

Key Specifications

Speed 50MHz
RAM Size 2.25K x 8
Core Size 8-Bit
Peripherals Brown-out Detect/Reset, POR, PWM, WDT
Connectivity I2C, SMBus, SPI, UART/USART
Mounting Type Surface Mount
Number of I/O 16
Core Processor CIP-51 8051
Package / Case 20-WFQFN Exposed Pad
Data Converters A/D 15x12b
Oscillator Type Internal
Program Memory Size 16KB (16K x 8)
Program Memory Type FLASH
Operating Temperature -40degC ~ 85degC (TA)
Supplier Device Package 20-QFN (3x3)
Voltage - Supply (Vcc/Vdd) 2.2V ~ 3.6V

Getting Started

Developers can use the Silicon Labs Simplicity Studio IDE, which provides a complete development environment and hardware configuration tools. The EFM8BB21 is supported by the 8-bit USB Debug Adapter or the EFM8 Busy Bee Starter Kit (EFM8BB2-STK). A pre-loaded UART bootloader is included to facilitate easy field updates and firmware loading.

Also Consider

EFM8BB31F16G-D-QFN24R SiLSilicon Labs - Provides more I/O pins and additional analog features if the 20-pin version is too restrictive.
ATtiny1616 MCHPMicrochip Technology - An alternative 8-bit MCU with similar flash and pin count featuring the modern AVR 0-series architecture.
STM8S003F3P6 STMicroelectronics - A widely used 8-bit alternative for cost-sensitive applications, though with a lower maximum clock speed.

Categories

Microcontrollers > 8051