EFR32BG21 Series 2 Bluetooth® Wireless SoC
Wireless Gecko Series 2 devices are the next evolution of Wireless Gecko devices bringing high performance, low power, and secure solutions to the Internet of Things. Designed to increase processing capability, improve RF performance and lower active current, the devices also provide the highest level of IoT device security. The EFR32BG21B devices are also designed to support Silicon Labs' enhanced security option, Secure Vault. Learn more about Silicon Labs' security portfolio.
EFR32BG21 devices are 2.4 GHz wireless SOCs optimized for line-powered Bluetooth Low Energy and Bluetooth mesh applications, including connected lighting, smart plugs, gateways and voice assistants. An 80 MHz ARM® Cortex®-M33 core provides plenty of processing capability while an integrated security subsystem provides leading security features that greatly reduce the risk of IoT security breaches and compromised intellectual property. With better than -104 dBm sensitivity and up to +20 dBm output power, the EFR32BG21 family uses Simplicity Studio 5 development tools, providing easy migration and fast time-to-market with development kits, SDKs, mobile apps, our energy profiler and patented network analyzer.
EFR32BG21 Common Specs
Bluetooth Low Energy Radio
- Compatible with Bluetooth 5.4 and Bluetooth mesh specification
- Excellent receive sensitivity:
- 104.9 dBm @125 kbps GFSK
- -97.5 dBm @1 Mbps GFSK
- -94.4 dBm @2 Mbps GFSK
- 104.9 dBm @125 kbps GFSK
- Programmable output power: Up to +20 dBm
- Active mode RX: 8.8 mA
- Active mode TX: 9.3 mA @ 0 dBm
- Active mode TX: 33.8 mA @ 10 dBm
Rich Analog and Digital Peripherals
- 12-bit 1 Msps SAR Analog to Digital Converter (ADC)
- Analog Comparators (ACMP)
- 8 Channel DMA Controller
- Peripheral Reflex System (PRS)
- PTA (Packet Traffic Arbitration) for Wi-Fi Coexistence
- 16-bit Timer/Counters
- 3 Compare/Capture/PWM channels per Timer
- 32-bit Timer/Counter
- 3 Compare/Capture/PWM channels per Timer
- 24-bit Low Energy Timer for waveform generation
- Watchdog Timers
- Universal Synchronous/Asynchronous Receiver/Transmitter (UART/SPI/SmartCard(ISO 7816)/IrDA/I2S)
- I2C interface with SMBus support
- Up to 20 General Purpose I/O pins
- Output state retention and asynchronous interrupts
Powerful MCU & Memory Options
- ARM® Cortex®-M33
- Floating-Point Unit
- Up to 80 MHz Clock Speed
- Low Active Mode Current: 50.9 µA/MHz
- Up to 1024 kB of Programmable Flash
- Up to 96 kB SRAM
Package Options
- QFN32 (4 mm x 4 mm)
| Part Number | Pricing | MCU Core | Core Frequency (MHz) | Flash | RAM | Bluetooth 5.1 | Bluetooth 5 | Bluetooth Mesh | Secure Vault | Cryptography | Output Power Range (dBm) | Receive Sensitivity | GPIO | RX Current (mA) | UART | USART | I²C | SPI | I²S | ADC | Comparators | Timers (16-bit) | Temperature Range ºC | Package Type | Package Size (mm) |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1K @ US$1.8 | ARM Cortex-M33 | 80 | 512 | 64 | — | AES-256 ECC SHA-1 SHA-2 | -20 10 | -97 (1 Mbit/s GFSK) | 20 | 8.7 | 3 | 3 | 2 | 3 | 3 | 12-bit, SAR, 1 Msps | 2 | 7 | -40 125 | QFN32 | 4x4 | ||||
| 1K @ US$2.95 | ARM Cortex-M33 | 80 | 1024 | 96 | Yes | AES-128 AES-256 ECC SHA-1 SHA-2 | -20 10.5 | -97 (1 Mbit/s GFSK) | 20 | 8.7 | 0 | 3 | 2 | 0 | 3 | 12-bit, SAR, 1 Msps | 2 | 2 | -40 125 | QFN32 | 4x4 | ||||
| 1K @ US$2.12 | ARM Cortex-M33 | 80 | 512 | 64 | Yes | AES-128 AES-256 ECC SHA-1 SHA-2 | -20 10.5 | -97 (1 Mbit/s GFSK) | 17 | 8.7 | 0 | 3 | 2 | 0 | 3 | 12-bit, SAR, 1 Msps | 2 | 2 | -40 125 | QFN32 | 4x4 | ||||
| 1K @ US$2.44 | ARM Cortex-M33 | 80 | 768 | 64 | Yes | AES-128 AES-256 ECC SHA-1 SHA-2 | -20 10.5 | -97 (1 Mbit/s GFSK) | 20 | 8.7 | 0 | 3 | 2 | 0 | 3 | 12-bit, SAR, 1 Msps | 2 | 2 | -40 125 | QFN32 | 4x4 | ||||
| 1K @ US$3.49 | ARM Cortex-M33 | 80 | 1024 | 96 | Yes | AES-128 AES-256 ECC SHA-1 SHA-2 | -20 20 | -97 (1 Mbit/s GFSK) | 20 | 8.7 | 0 | 3 | 2 | 0 | 3 | 12-bit, SAR, 1 Msps | 2 | 2 | -40 125 | QFN32 | 4x4 | ||||
| 1K @ US$2.67 | ARM Cortex-M33 | 80 | 512 | 64 | Yes | AES-128 AES-256 ECC SHA-1 SHA-2 | -20 20 | -97 (1 Mbit/s GFSK) | 20 | 8.7 | 0 | 3 | 2 | 0 | 3 | 12-bit, SAR, 1 Msps | 2 | 2 | -40 125 | QFN32 | 4x4 | ||||
| 1K @ US$2.99 | ARM Cortex-M33 | 80 | 768 | 64 | Yes | AES-128 AES-256 ECC SHA-1 SHA-2 | -20 20 | -97 (1 Mbit/s GFSK) | 20 | 8.7 | 0 | 3 | 2 | 0 | 3 | 12-bit, SAR, 1 Msps | 2 | 2 | -40 125 | QFN32 | 4x4 | ||||
| 1K @ US$2.63 | ARM Cortex-M33 | 80 | 1024 | 96 | — | AES-256 ECC SHA-1 SHA-2 | -20 10 | -97 (1 Mbit/s GFSK) | 20 | 8.7 | 3 | 3 | 2 | 3 | 3 | 12-bit, SAR, 1 Msps | 2 | 7 | -40 125 | QFN32 | 4x4 | ||||
| 1K @ US$2.12 | ARM Cortex-M33 | 80 | 768 | 64 | — | AES-256 ECC SHA-1 SHA-2 | -20 10 | -97 (1 Mbit/s GFSK) | 20 | 8.7 | 3 | 3 | 2 | 3 | 3 | 12-bit, SAR, 1 Msps | 2 | 7 | -40 125 | QFN32 | 4x4 | ||||
| 1K @ US$3.19 | ARM Cortex-M33 | 80 | 1024 | 96 | — | AES-256 ECC SHA-1 SHA-2 | -20 20 | -97 (1 Mbit/s GFSK) | 20 | 8.7 | 3 | 3 | 2 | 3 | 2 | 12-bit, SAR, 1 Msps | 2 | 7 | -40 125 | QFN32 | 4x4 | ||||
| 1K @ US$2.36 | ARM Cortex-M33 | 80 | 512 | 64 | — | AES-256 ECC SHA-1 SHA-2 | -20 20 | -97 (1 Mbit/s GFSK) | 20 | 8.7 | 3 | 3 | 2 | 3 | 3 | 12-bit, SAR, 1 Msps | 2 | 7 | -40 125 | QFN32 | 4x4 | ||||
| 1K @ US$2.67 | ARM Cortex-M33 | 80 | 768 | 64 | — | AES-256 ECC SHA-1 SHA-2 | -20 20 | -97 (1 Mbit/s GFSK) | 20 | 8.7 | 3 | 3 | 2 | 3 | 3 | 12-bit, SAR, 1 Msps | 2 | 7 | -40 125 | QFN32 | 4x4 |
EFR32xG21 Wireless Gecko Starter Kit
