EFR32SG28 Dual-Band Wireless SoC for Amazon Sidewalk

The EFR32SG28 is a secure, low power dual-band SoC for Amazon Sidewalk devices that supports Bluetooth Low Energy and sub-GHz FSK, providing reliable connectivity in the home using Bluetooth LE and beyond the front door using sub-GHz FSK to cover detached buildings, pools, and spas. The multi-core device has efficient ARM Cortex®-M33 running up to 78 MHz and with 1024 kB of Flash and 256 kB of RAM. The low active and sleep currents make it ideal for battery operated end devices like sensors including door, window, and temperature sensors devices, while the link budget of 128.6 dBm provides long range and reliable communication. The dedicated security core supports our Secure Vault™ High, bringing industry leading IoT security to the device to protect wireless data and the device from both remote and local attacks.

1024 kB of Flash and 256 kB of RAM
Dual-band radio operation

EFR32SG28 Common Specs

Low Power Wireless System-on-Chip

  • ARM Cortex®-M33 (78 MHz) with DSP and FPU
  • 1024 kB flash program memory
  • 256 kB RAM data memory
  • Dual-band radio operationn

Low Energy Consumption

  • 4.2 mA RX current at 915 MHz (50 kbps 2GFSK)
  • 5.2 mA RX current at 2.4 GHz, 1 Mbps BLE
  • 81.8 mA TX current @ 14 dBm output power at 915 MHz
  • 12.3 mA TX current @ 0 dBm output power, 2.4 GHz
  • 23.2 mA TX current @ 10 dBm output power, 2.4 GHz
  • 33 μA/MHz in Active Mode (EM0) at 39.0 MHz
  • 2.8 μA EM2 DeepSleep current (256 kB RAM retention and RTC running from LFXO)
  • Preamble Sense Mode (PSM) low duty-cycle listen

Wide Selection of MCU peripherals

  • 16-bit Analog to Digital Converter (ADC)
  • 2 × Analog Comparator (ACMP)
  • 2 x Digital to Analog Converter (VDAC)
  • Low-Energy Sensor Interface (LESENSE)
  • Up to 49 General Purpose I/O pins
  • 8 Channel DMA Controller
  • 12 Channel Peripheral Reflex System (PRS)
  • 4 × 16-bit Timer/Counter with 3 Compare/Capture/PWM channels
  • 1 × 32-bit Timer/Counter with 3 Compare/Capture/PWM channels
  • 32-bit Real Time Counter
  • 24-bit Low Energy Timer for waveform generation
  • 16-bit Pulse Counter with asynchronous operation (PCNT)
  • 2 × Watchdog Timer
  • 3 × Enhanced Universal Synchronous/Asynchronous Receiver/Transmitter (UART/SPI)
  • 1 x Universal Synchronous/Asynchronous Receiver/Transmitter (UART/SPI/I2S)
  • 2 × I2C interface with SMBus support
  • Integrated low-energy LCD controller supporting up to 192 segments
  • Keypad scanner supporting up to 6 x 8 matrix (KEYSCAN)
  • Die temperature sensor

Protocol Support

  • Amazon Sidewalk
  • Bluetooth Low Energy

HIgh Performance RF

  • TX power up to +20 dBm
  • -108.6 dBm sensitivity @ 50 kbps, 915 MHz 2GFSK

Wide Operating Range

  • 1.71 to 3.8 V single power supply
  • -40 °C to +125 °C

Packages

  • QFN48 6 mm x 6 mm x 0.85 mm
  • QFN68 8 mm x 8 mm x 0.85 mm

Secure Vault

Status

Find the Right EFR32SG28 Device Select Columns

Select Columns
Part Number Pricing Integrated MCU MCU Core Flash RAM Communications Max Output Power (dBm) Proprietary 2.4 GHz Proprietary Sub-GHz Multiprotocol Security GPIO Cap Sense Temp Sensor Timers (16-bit) RTC Comparators Temperature Range ºC Package Type Package Size (mm) Debug Interface
1K @ US$4.54 ARM Cortex-M33 1024 256 2 x I²C 5 x SPI 20 AES-128 AES-256 ECC SHA-1 SHA-2 31 4 2 -40 125 QFN48 6x6 JTAG, SW, ETM
1K @ US$4.76 ARM Cortex-M33 1024 256 2 x I²C 5 x SPI 20 AES-128 AES-256 ECC SHA-1 SHA-2 49 4 2 -40 125 QFN68 8x8 JTAG, SW, ETM
1K @ US$4.85 ARM Cortex-M33 1024 256 2 x I²C 5 x SPI 20 AES-128 AES-256 ECC SHA-1 SHA-2 31 4 2 -40 125 QFN48 6x6 JTAG, SW, ETM
1K @ US$5.07 ARM Cortex-M33 1024 256 2 x I²C 5 x SPI 20 AES-128 AES-256 ECC SHA-1 SHA-2 49 4 2 -40 125 QFN68 8x8 JTAG, SW, ETM

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