EFR32MG21 Series 2 Multiprotocol Wireless SoC

EFR32MG21 devices bring high performance, low power and secure solutions to the IoT. Designed to increase processing capability, improve RF performance and lower active current, EFR32MG21 devices are 2.4 GHz wireless SoCs optimized for line-powered Zigbee, Thread and Bluetooth mesh applications, including connected lighting, gateways, voice assistants and smart metering.

The EFR32MG21 family of SoCs includes an integrated security subsystem and devices that can take advantage of Secure Vault technologies. Secure Vault delivers leading security software features with physically unclonable function (PUF) hardware technology to greatly reduce the risk of IoT security breaches and compromised intellectual property

With better than -104 dBm sensitivity for both 802.15.4 and Bluetooth Long Range and up to +20 dBm output power, EFR32MG21 provides a robust RF link to ensure reliable communications. EFR32MG21 uses Simplicity Studio 5 development tools, providing easy migration and fast time-to-market with development kits, SDKs, mobile apps and our patented network analyzer.

Ideal applications
Lighting and voice assistants
Highest level of IoT Security
Secure Vault

EFR32MG21 Common Specs

Zigbee and Thread Radio

  • 2.4 GHz IEEE 802.15.4
  • 250 kbps O-QPSK DSSS
  • Excellent Receive Sensitivity:
    • -104.5 dBm @250 kbps O-QPSK DSSS
  • Programmable Output Power: +20 dBm
  • Active Mode RX: 9.4 mA
  • Active Mode TX: 9.3 mA @ 0 dBm
  • Active Mode TX: 33.8 mA @ 10 dBm

Bluetooth® Low Energy Radio

  • Compatible with Bluetooth 5, Bluetooth 5.1 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
  • 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
  • 32-bit Real Time Counter
  • 24-bit Low Energy Timer for waveform generation
  • Watchdog Timers
  • Universal Synchronous/Asynchronous Receiver/Transmitter (UART/SPI/SmartCard(ISO 7816)/IrDA/I2S)
  • 2C 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
    • DSP and 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 RAM

Package Options

  • QFN32 (4 mm x 4 mm)

Securing Your IoT Product

IoT security is key to protecting company brands, end user privacy and commercial viability of products. Vulnerabilities can be exploited through both remote Internet attacks and physical hands-on-attacks.

Developers using the Silicon Labs EFR32MG21 family have access to the highest level of IoT security provided by Secure Vault.

Find the Right EFR32MG21 Device Select Columns
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Part Number MCU Core Frequency (MHz) Flash RAM 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) Wireless Standards Multiprotocol
ARM Cortex-M33 80 1024 96 Yes AES-128 AES-256 ECC SHA-1 SHA-2 -20 10.5 -104 (250 kbps O-QPSK DSSS) 20 9.4 0 3 2 0 3 12-bit, SAR, 1 Msps 2 2 -40 125 QFN32 4x4 Thread Zigbee Bluetooth Switched Programmable Dynamic
ARM Cortex-M33 80 512 64 Yes AES-128 AES-256 ECC SHA-1 SHA-2 -20 10.5 -104 (250 kbps O-QPSK DSSS) 20 9.4 0 3 2 0 3 12-bit, SAR, 1 Msps 2 2 -40 125 QFN32 4x4 Thread Zigbee Bluetooth Switched Programmable Dynamic
ARM Cortex-M33 80 768 64 Yes AES-128 AES-256 ECC SHA-1 SHA-2 -20 10.5 -104 (250 kbps O-QPSK DSSS) 20 9.4 0 3 2 0 3 12-bit, SAR, 1 Msps 2 2 -40 125 QFN32 4x4 Thread Zigbee Bluetooth Switched Programmable Dynamic
ARM Cortex-M33 80 512 64 Yes AES-128 AES-256 ECC SHA-1 SHA-2 -20 20 -104 (250 kbps O-QPSK DSSS) 20 9.4 0 3 2 0 3 12-bit, SAR, 1 Msps 2 2 -40 125 QFN32 4x4 Thread Zigbee Bluetooth Switched Programmable Dynamic
ARM Cortex-M33 80 768 64 Yes AES-128 AES-256 ECC SHA-1 SHA-2 -20 20 -104 (250 kbps O-QPSK DSSS) 20 9.4 0 3 2 0 3 12-bit, SAR, 1 Msps 2 2 -40 125 QFN32 4x4 Thread Zigbee Bluetooth Switched Programmable Dynamic
ARM Cortex-M33 80 1024 96 AES-256 ECC SHA-1 SHA-2 -20 10 -104 (250 kbps O-QPSK DSSS) 20 9.4 3 3 2 3 3 12-bit, SAR, 1 Msps 2 7 -40 125 QFN32 4x4 Thread Zigbee Bluetooth Switched Programmable Dynamic
ARM Cortex-M33 80 512 64 AES-256 ECC SHA-1 SHA-2 -20 10 -104 (250 kbps O-QPSK DSSS) 20 9.4 3 3 2 3 3 12-bit, SAR, 1 Msps 2 7 -40 125 QFN32 4x4 Thread Zigbee Bluetooth Switched Programmable Dynamic
ARM Cortex-M33 80 768 64 AES-256 ECC SHA-1 SHA-2 -20 10 -104 (250 kbps O-QPSK DSSS) 20 9.4 3 3 2 3 3 12-bit, SAR, 1 Msps 2 7 -40 125 QFN32 4x4 Thread Zigbee Bluetooth Switched Programmable Dynamic
ARM Cortex-M33 80 1024 96 AES-256 ECC SHA-1 SHA-2 -20 20 -104 (250 kbps O-QPSK DSSS) 20 9.4 3 3 2 3 3 12-bit, SAR, 1 Msps 2 7 -40 125 QFN32 4x4 Thread Zigbee Bluetooth Switched Programmable Dynamic
ARM Cortex-M33 80 512 64 AES-256 ECC SHA-1 SHA-2 -20 20 -104 (250 kbps O-QPSK DSSS) 20 9.4 3 3 2 3 3 12-bit, SAR, 1 Msps 2 7 -40 125 QFN32 4x4 Thread Zigbee Bluetooth Switched Programmable Dynamic
ARM Cortex-M33 80 768 64 AES-256 ECC SHA-1 SHA-2 -20 20 -104 (250 kbps O-QPSK DSSS) 20 9.4 3 3 2 3 3 12-bit, SAR, 1 Msps 2 7 -40 125 QFN32 4x4 Thread Zigbee Bluetooth Switched Programmable Dynamic

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