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 EFR32BG21 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 -104.3 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:
- -105 dBm @ 125 kbps GFSK
- -97.1 dBm @ 1 Mbps GFSK
- -94 dBm @ 2 Mbps GFSK
- -105 dBm @ 125 kbps GFSK
- Programmable output power: Up to +20 dBm
- 8.8 mA RX current @ 2.4 GHz (1 Mbps GFSK)
- 9.9 mA TX current @ 0 dBm output power at 2.4 GHz
- 34.9 mA TX current @ 10 dBm output power at 2.4 GHz
Rich Analog and Digital Peripherals
- 12-bit 1 Msps SAR Analog to Digital Converter (ADC)
- 2 x Analog Comparators (ACMP)
- 8 Channel DMA Controller
- Peripheral Reflex System (PRS)
- PTA (Packet Traffic Arbitration) for Wi-Fi Coexistence
- 2 x 16-bit Timer/Counters
- 3 Compare/Capture/PWM channels per Timer
- 32-bit Timer/Counter
- 3 Compare/Capture/PWM channels per Timer
- 32-bit Real Time Counter
- 24-bit Low Energy Timer for waveform generation
- 2 x Watchdog Timers
- 3 x 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)
BG21 Security Features
- Secure Boot with Root of Trust and Secure Loader (RTSL)
- Cryptographic Accelerator
- True Random Number Generator (TRNG)
- Secure Debug with Lock/Unlock
- DPA Countermeasures
- Secure Attestation
- Secure Key Management with PUF
- Anti-Tamper
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| Part Number | Pricing | MCU Core | Core Frequency (MHz) | Flash | RAM | Bluetooth | 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$3.49 | ARM Cortex-M33 | 80 | 1024 | 96 | 5.4 | Base | AES-128 AES-256 ECC SHA-1 SHA-2 | -20 20 | -97.1 (1 Mbit/s GFSK) | 20 | 8.8 | 3 | 3 | 2 | 3 | 3 | 12-bit, SAR, 1 Msps | 2 | 3 | -40 125 | QFN32 | 4x4 | ||
| 1K @ US$2.63 | ARM Cortex-M33 | 80 | 1024 | 96 | 5.4 | Base | AES-256 ECC SHA-1 SHA-2 | -20 10 | -97.1 (1 Mbit/s GFSK) | 20 | 8.8 | 3 | 3 | 2 | 3 | 3 | 12-bit, SAR, 1 Msps | 2 | 3 | -40 125 | QFN32 | 4x4 | ||
| 1K @ US$1.8 | ARM Cortex-M33 | 80 | 512 | 64 | 5.4 | Base | AES-256 ECC SHA-1 SHA-2 | -20 10 | -97.1 (1 Mbit/s GFSK) | 20 | 8.8 | 3 | 3 | 2 | 3 | 3 | 12-bit, SAR, 1 Msps | 2 | 3 | -40 125 | QFN32 | 4x4 | ||
| 1K @ US$2.12 | ARM Cortex-M33 | 80 | 768 | 64 | 5.4 | Base | AES-256 ECC SHA-1 SHA-2 | -20 10 | -97.1 (1 Mbit/s GFSK) | 20 | 8.8 | 3 | 3 | 2 | 3 | 3 | 12-bit, SAR, 1 Msps | 2 | 3 | -40 125 | QFN32 | 4x4 | ||
| 1K @ US$3.19 | ARM Cortex-M33 | 80 | 1024 | 96 | 5.4 | Base | AES-256 ECC SHA-1 SHA-2 | -20 20 | -97.1 (1 Mbit/s GFSK) | 20 | 8.8 | 3 | 3 | 2 | 3 | 2 | 12-bit, SAR, 1 Msps | 2 | 3 | -40 125 | QFN32 | 4x4 | ||
| 1K @ US$2.36 | ARM Cortex-M33 | 80 | 512 | 64 | 5.4 | Base | AES-256 ECC SHA-1 SHA-2 | -20 20 | -97.1 (1 Mbit/s GFSK) | 20 | 8.8 | 3 | 3 | 2 | 3 | 3 | 12-bit, SAR, 1 Msps | 2 | 3 | -40 125 | QFN32 | 4x4 | ||
| 1K @ US$2.67 | ARM Cortex-M33 | 80 | 768 | 64 | 5.4 | Base | AES-256 ECC SHA-1 SHA-2 | -20 20 | -97.1 (1 Mbit/s GFSK) | 20 | 8.8 | 3 | 3 | 2 | 3 | 3 | 12-bit, SAR, 1 Msps | 2 | 3 | -40 125 | QFN32 | 4x4 | ||
| 1K @ US$2.99 | ARM Cortex-M33 | 80 | 768 | 64 | 5.4 | Base | AES-128 AES-256 ECC SHA-1 SHA-2 | -20 20 | -97.1 (1 Mbit/s GFSK) | 20 | 8.8 | 3 | 3 | 2 | 3 | 3 | 12-bit, SAR, 1 Msps | 2 | 3 | -40 125 | QFN32 | 4x4 | ||
| 1K @ US$2.95 | ARM Cortex-M33 | 80 | 1024 | 96 | 5.4 | Yes | AES-128 AES-256 ECC SHA-1 SHA-2 | -20 10.5 | -97.1 (1 Mbit/s GFSK) | 20 | 8.8 | 3 | 3 | 2 | 3 | 3 | 12-bit, SAR, 1 Msps | 2 | 3 | -40 125 | QFN32 | 4x4 | ||
| 1K @ US$2.12 | ARM Cortex-M33 | 80 | 512 | 64 | 5.4 | Yes | AES-128 AES-256 ECC SHA-1 SHA-2 | -20 10.5 | -97.1 (1 Mbit/s GFSK) | 17 | 8.8 | 3 | 3 | 2 | 3 | 3 | 12-bit, SAR, 1 Msps | 2 | 3 | -40 125 | QFN32 | 4x4 | ||
| 1K @ US$2.44 | ARM Cortex-M33 | 80 | 768 | 64 | 5.4 | Yes | AES-128 AES-256 ECC SHA-1 SHA-2 | -20 10.5 | -97.1 (1 Mbit/s GFSK) | 20 | 8.8 | 3 | 3 | 2 | 3 | 3 | 12-bit, SAR, 1 Msps | 2 | 3 | -40 125 | QFN32 | 4x4 | ||
| 1K @ US$2.67 | ARM Cortex-M33 | 80 | 512 | 64 | 5.4 | Yes | AES-128 AES-256 ECC SHA-1 SHA-2 | -20 20 | -97.1 (1 Mbit/s GFSK) | 20 | 8.8 | 3 | 3 | 2 | 3 | 3 | 12-bit, SAR, 1 Msps | 2 | 3 | -40 125 | QFN32 | 4x4 |
Showing 1 to 12 of 12 entries
EFR32xG21 Wireless Gecko Starter Kit
The EFR32xG21 Wireless Gecko Starter Kit (SLWSTK6006A) includes everything needed to enable developers to create a mesh network and evaluate the EFR32xG21A with Secure Element and the EFR32xG21B with Secure Vault Series 2 Wireless Gecko SoCs. This kit provides the common baseboard and comes with 6 xG21A modules (SLWRB418xA). If you want to evaluate the EFR32xG21B you must buy the xG21B modules (SLWRB4181C +10 dBm) separately.
EFR32xG21 Wireless Gecko Starter Kit
The EFR32xG21 Wireless Gecko Starter Kit (SLWSTK6006A) includes everything needed to enable developers to create a mesh network and evaluate the EFR32xG21A with Secure Element and the EFR32xG21B with Secure Vault Series 2 Wireless Gecko SoCs. This kit provides the common baseboard and comes with 6 xG21A modules (SLWRB418xA). If you want to evaluate the EFR32xG21B you must buy the xG21B modules (SLWRB4181C +10 dBm) separately.
EFR32xG21 Wireless 2.4 GHz Pro Kit +20 dBm
The EFR32xG21 Pro Kit, xG21-PK6027A, is designed to support the development of wireless IoT devices based on the EFR32xG21 Rev D +20 dBm SoC and support the development of wireless protocols including Bluetooth LE, Bluetooth Mesh, Thread (for Matter) and Zigbee.
EFR32xG21 Wireless 2.4 GHz Pro Kit +20 dBm
The EFR32xG21 Pro Kit, xG21-PK6027A, is designed to support the development of wireless IoT devices based on the EFR32xG21 Rev D +20 dBm SoC and support the development of wireless protocols including Bluetooth LE, Bluetooth Mesh, Thread (for Matter) and Zigbee.
EFR32xG21 Wireless 2.4 GHz Pro Kit +10 dBm
The EFR32xG21 Pro Kit, xG21-PK6026A, is designed to support the development of wireless IoT devices based on the EFR32xG21B Rev D +10 dBm SoC and support the development of wireless protocols including Bluetooth LE, Bluetooth Mesh, Thread (for Matter) and Zigbee.
EFR32xG21 Wireless 2.4 GHz Pro Kit +10 dBm
The EFR32xG21 Pro Kit, xG21-PK6026A, is designed to support the development of wireless IoT devices based on the EFR32xG21B Rev D +10 dBm SoC and support the development of wireless protocols including Bluetooth LE, Bluetooth Mesh, Thread (for Matter) and Zigbee.
EFR32xG21 Bluetooth Starter Kit
The EFR32xG21 Bluetooth Starter Kit supports Bluetooth 5.1 and comes ready to connect to your phone via the Silicon Labs Bluetooth LE mobile app. This Kit comes with an EFR32xG21A with Secure Element 2.4 GHz wireless SOC is optimized for line-powered BLE and Bluetooth mesh applications, including connected lighting, smart plugs, gateways, and voice assistants. Optionally, if you want to evaluate the EFR32xG21B with Secure Vault, you can purchase an xG21B module (SLWRB4181C +10 dBm) separately.
EFR32xG21 Bluetooth Starter Kit
The EFR32xG21 Bluetooth Starter Kit supports Bluetooth 5.1 and comes ready to connect to your phone via the Silicon Labs Bluetooth LE mobile app. This Kit comes with an EFR32xG21A with Secure Element 2.4 GHz wireless SOC is optimized for line-powered BLE and Bluetooth mesh applications, including connected lighting, smart plugs, gateways, and voice assistants. Optionally, if you want to evaluate the EFR32xG21B with Secure Vault, you can purchase an xG21B module (SLWRB4181C +10 dBm) separately.
EFR32xG21B Rev D Wireless 2.4 GHz +10 dBm Radio Board
The EFR32xG21B Rev D +10 dBm SoC Radio Board, xG21-RB4195B, is designed work with the Wireless Pro Kit Mainboard (not included) to support the development of wireless IoT devices based on 2.4 GHz wireless protocols including Bluetooth LE, Bluetooth Mesh, Thread (for Matter) and Zigbee.
EFR32xG21B Rev D Wireless 2.4 GHz +10 dBm Radio Board
The EFR32xG21B Rev D +10 dBm SoC Radio Board, xG21-RB4195B, is designed work with the Wireless Pro Kit Mainboard (not included) to support the development of wireless IoT devices based on 2.4 GHz wireless protocols including Bluetooth LE, Bluetooth Mesh, Thread (for Matter) and Zigbee.
EFR32xG21B Rev D Wireless 2.4 GHz +20 dBm Radio Board
The EFR32xG21B Rev D +20 dBm SoC Radio Board, xG21-RB4196B, is designed work with the Wireless Pro Kit Main board (not included) to support the development of wireless IoT devices based on 2.4 GHz wireless protocols including Bluetooth LE, Bluetooth Mesh, Thread (for Matter) and Zigbee.
EFR32xG21B Rev D Wireless 2.4 GHz +20 dBm Radio Board
The EFR32xG21B Rev D +20 dBm SoC Radio Board, xG21-RB4196B, is designed work with the Wireless Pro Kit Main board (not included) to support the development of wireless IoT devices based on 2.4 GHz wireless protocols including Bluetooth LE, Bluetooth Mesh, Thread (for Matter) and Zigbee.
EFR32xG21B Wireless Gecko 2.4 GHz +10 dBm Radio Board with Secure Vault
The Wireless Gecko SLWRB4181C wireless radio board plugs into the Main Board provided with the EFR32xG21 Wireless Gecko Starter Kit or the EFR32xG21 Bluetooth Starter Kit and must be purchased separately from either of those kits. The starter kits include access to Zigbee, Thread, and Bluetooth software stacks with the highest level of IoT security provided by Secure Vault.
EFR32xG21B Wireless Gecko 2.4 GHz +10 dBm Radio Board with Secure Vault
The Wireless Gecko SLWRB4181C wireless radio board plugs into the Main Board provided with the EFR32xG21 Wireless Gecko Starter Kit or the EFR32xG21 Bluetooth Starter Kit and must be purchased separately from either of those kits. The starter kits include access to Zigbee, Thread, and Bluetooth software stacks with the highest level of IoT security provided by Secure Vault.
EFR32xG21A Wireless Gecko 2.4 GHz +10 dBm Radio Board
The Wireless Gecko SLWRB4181B wireless radio board plugs into the Main Board provided with the Wireless Gecko Starter Kit. The starter kit includes access to Zigbee, Thread, and Bluetooth software stacks.
EFR32xG21A Wireless Gecko 2.4 GHz +10 dBm Radio Board
The Wireless Gecko SLWRB4181B wireless radio board plugs into the Main Board provided with the Wireless Gecko Starter Kit. The starter kit includes access to Zigbee, Thread, and Bluetooth software stacks.
EFR32xG21A Wireless Gecko 2.4 GHz +20 dBm Radio Board
The Wireless Gecko SLWRB4180B wireless radio board plugs into the Main Board provided with the Wireless Gecko Starter Kit. The starter kit includes access to Zigbee, Thread, and Bluetooth software stacks.
EFR32xG21A Wireless Gecko 2.4 GHz +20 dBm Radio Board
The Wireless Gecko SLWRB4180B wireless radio board plugs into the Main Board provided with the Wireless Gecko Starter Kit. The starter kit includes access to Zigbee, Thread, and Bluetooth software stacks.
