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EFM8BB21F16G-C-QFN20R
EFM8BB21F16G-C-QFN20R
| Part Number | EFM8BB21F16G-C-QFN20R |
|---|---|
| Manufacturer | Silicon Labs |
| Category | Integrated Circuits (ICs) > Embedded – Microcontrollers |
| Description | Busy Bee family high-performance 8-bit CIP-51 microcontroller running at 50 MHz, integrating 16 KB Flash, 2.25 KB (2304 Byte) RAM, 15-channel 12-bit ADC, dual analog comparators, 2 UARTs, flexible crossbar I/O multiplexer, packed in compact 3×3mm QFN-20 package. |
| Stock Status | In Stock |
| Origin | Original Factory |
Product Overview
The EFM8BB21F16G-C-QFN20R is an industrial 8-bit CIP-51 MCU from Silicon Labs EFM8 BB2 series, max 50MHz clock and fully 8051 instruction compatible. It features 16KB in-system programmable Flash and 2304B RAM, integrated 15-channel 12-bit ADC, temperature sensor, dual comparators, dual UART, SPI, I2C, 5×16-bit timers and 3-channel safety PWM. The programmable crossbar freely maps peripherals to 16 multifunction GPIO pins to simplify PCB design. Packaged in 3×3mm 20-WFQFN with exposed thermal pad, it fits consumer electronics, industrial control and optical communication applications.
Core Advantages
High-Speed Pipelined 8-bit Core
Adopts pipelined CIP-51 architecture with max 50 MHz clock speed; 70% of instructions complete in 1 to 2 clock cycles for stable, fast deterministic computation.
Innovative Flexible Digital Crossbar
Full programmable internal pin routing matrix, allowing free assignment of UART, SPI, PWM and timers to any GPIO pin, eliminating pin conflict and simplifying PCB layout design.
Precision Integrated Analog Processing
Built-in 15-channel 12-bit ADC, internal voltage reference, dual low-power analog comparators and on-chip temperature sensor, supporting high-precision signal acquisition without external analog chips.
Exceptional Low-Power Optimization
Multiple power saving modes (Idle/Suspend/Snooze/Shutdown) with ultra-low quiescent current, plus fast wake-up timers to extend battery service life for portable IoT devices.
Key Specifications
| Brand | Silicon Labs |
|---|---|
| RoHS Status | RoHS3 Compliant / Lead-Free / Halogen-Free Materials Sourced |
| EDA/CAD Model | 3D STEP Models, Schematic Symbols, and PCB footprint configurations available upon request |
| Warranty | 1-Year Standard Quality Warranty |
| Package / Case | 20-WFQFN (3mm × 3mm) |
| Mounting Type | Surface Mount Technology (SMD/SMT Reflow Lead Solder) |
| Tape & Reel Package | R suffix = Standard Tape & Reel for SMT Mass Production |
| Surface Marking / Silkscreen | BB21F16G Marking |
| CPU Bit Width | 8-bit Microcontroller Core (51 Architecture Family) |
| Processor Core Base | Pipelined CIP-51 (Full compatible with standard 8051 instruction sets) |
| Maximum CPU Speed | 50 MHz Maximum Core Operating Frequency |
| Program Memory Type | In-System Reprogrammable Flash Memory |
| Flash Program Memory Size | 16 KB On-Chip Flash Memory |
| Data RAM Capacity | 2.25 KB (2304 Byte) Internal Data SRAM |
| Analog-to-Digital Converter | 15-channel 12-bit High-Accuracy ADC, Max 1 Msps Sampling Rate |
| Digital Communications Ports | 1 × I²C / SMBus (Up to 3.4 Mbps HS-Mode), 1 × SPI, 2 × UART Serial Port Interfaces |
| Additional Peripherals | 5×16-bit Timers, 3-channel PCA/PWM with hardware safety shutdown, dual analog comparators, integrated temperature sensor, Programmable Digital Crossbar, Internal Watchdog Timer, Power-On Reset |
| Total Multifunction I/O Pins | 16 Channels 5V Tolerant GPIO, 10mA Sink/Source Drive Current |
| Operating Voltage Scope | 2.2V to 3.6V Continuous Supply Input Domain |
| Operating Temperature Range | -40°C to +85°C (Industrial-Grade Environmental Thermal Boundaries) |
| Low Power Modes | Idle Mode, Suspend Mode, Snooze Mode, Shutdown Mode with fast wakeup |
Typical Applications
- Optical Communications Network Transceiver Modules (SFP, QSFP Core Management)
- Brushless DC (BLDC) Motor Speed Regulators, Electric Fans, and Power Tool Controllers
- Consumer Electronics Smart Home Hardware, Wireless Charger Bases, and Handheld Electronic Toys
- Industrial Sensor Signal Aggregators, Environmental Monitors, and Distributed Data Nodes
- Battery Management Systems (BMS), LED Matrix Controllers, and Low-Power IoT Edge Devices
Order & Shipping Info
| Minimum Order Quantity (MOQ) | 1 Piece |
|---|---|
| Shipping Time | Shipped within 1-2 business days |
| Delivery Time | 3-7 working days worldwide |
| Shipping Methods | DHL, UPS, FedEx, EMS |
| Payment Methods | T/T (Bank Transfer), PayPal, Credit Card, Western Union |
Technical Support
For datasheet, sample requests, stock check, or bulk pricing, please use the Quick Inquiry form. We will reply within 24 hours.
Frequently Asked Questions
Q1: Is your currently available stock of the EFM8BB21F16G-C-QFN20R 100% genuine and original?
A: Yes, we guarantee that all EFM8BB21F16G-C-QFN20R microcontrollers in our warehouse stock are 100% brand-new, factory-original parts directly from Silicon Labs. Each production lot passes strict incoming inspections and is shipped in sealed, protective anti-static packaging to ensure component pins remain completely pristine.
Q2: What is the primary functional purpose of the integrated “Digital Crossbar” in this MCU?
A: Unlike conventional microcontrollers that lock peripheral functions to rigid physical pins, Silicon Labs’ Digital Crossbar allows you to route internal peripherals (like dual UART, SPI, and PWM timers) to any general-purpose I/O pin dynamically. This flexibility eliminates overlapping pin conflicts and simplifies physical trace layouts on your PCB.
Q3: What do the “C” and “R” designators represent at the end of this part number?
A: The “C” character indicates the specific hardware design revision level (Rev.C) of the silicon core from Silicon Labs. The trailing letter “R” designates that this specific part number is supplied on a Tape-and-Reel delivery format, optimized for automated pick-and-place component machines during mass production assembly.
Q4: How can our physical engineering group secure the full technical register documentation or request a bulk volume commercial quote?
A: Please complete our Quick Inquiry web form found directly on this product page, noting your target quantities and specific project metrics. Our specialized microcontroller application support desk will review your submission and reply with full data assets and custom commercial pricing tables within 24 hours.
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