Chip vs Chip

EFR32BG22 vs CYW20820

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Side-by-side comparison of EFR32BG22 and CYW20820 BLE SoCs.

    
    

      
    

  


  
  
  

    
      

        A
        
EFR32BG22

      

      

    
    
      

        B
        
CYW20820

      

      

    
  

  

  
  

  






  
  

    
EFR32BG22 vs CYW20820: Low-Power BLE vs Dual-Mode Wireless SoC


Overview


The Silicon Labs EFR32BG22 and Infineon's (formerly Cypress) CYW20820 occupy different niches in the wireless SoC landscape. The EFR32BG22 is a lean, low-power BLE 5.2 SoC optimized for battery-powered IoT sensors and wearables. The CYW20820 is a dual-mode Bluetooth SoC supporting both Bluetooth Classic and BLE 5.2, with automotive qualification and Bluetooth mesh capabilities, targeting industrial, automotive infotainment, and enterprise IoT applications.


The EFR32BG22 focuses almost entirely on minimizing power consumption. Its 1.0 µA deep-sleep current, compact 4×4 mm package, and Silicon Labs' Secure Vault Mid security feature set make it a natural fit for medical wearables, asset trackers, and coin-cell sensors. The BG22 is BLE-only — there is no Classic Bluetooth radio, which simplifies the design but limits it to BLE-capable host devices.


The CYW20820 integrates Bluetooth Classic (BR/EDR) for legacy audio profiles (A2DP, HFP, HSP) alongside BLE 5.2 for low-power data and ATT">GATT profiles. Its Bluetooth mesh support, combined with an ARM Cortex-M4 application core, enables it to act as a mesh relay, proxy, or Friend node with enough compute headroom for meaningful application logic. Infineon positions the CYW20820 for automotive and industrial environments: it is AEC-Q100 qualified, operates from -40°C to 105°C, and has passed automotive EMC requirements.




Key Differences


    

  • Radio modes: CYW20820 supports dual-mode Bluetooth Classic + BLE 5.2; EFR32BG22 is BLE 5.2-only.
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  • Automotive qualification: CYW20820 is AEC-Q100 Grade 1 certified for automotive use; EFR32BG22 is not automotive-qualified.
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  • Power consumption: EFR32BG22 achieves approximately 1.0 µA sleep current — critical for coin-cell IoT; CYW20820's dual-mode radio architecture carries higher quiescent current in automotive-grade packaging.
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  • Application core: CYW20820 uses a Cortex-M4 with more SRAM; EFR32BG22 uses a Cortex-M33 at 38.4 MHz — different compute profiles.
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  • Security: EFR32BG22 includes Secure Vault Mid; CYW20820 provides hardware AES and secure boot but is not positioned around HSM-style key management.
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  • Bluetooth Mesh: CYW20820 has full Bluetooth Mesh stack support; EFR32BG22 supports Bluetooth Mesh via Silicon Labs' SDK but the BG22's limited Flash/RAM constrains mesh network size.
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  • Target market: CYW20820 is explicitly automotive/industrial; EFR32BG22 is medical/consumer IoT.
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Use Cases


EFR32BG22 is ideal for:
- Coin-cell IoT sensors with multi-year battery life requirements
- Medical wearables and diagnostic patches requiring BLE 5.2 and hardware security
- Consumer BLE accessories (HID peripherals, fitness trackers) in compact form factors


CYW20820 is ideal for:
- Automotive head units requiring both Bluetooth Classic audio (A2DP) and BLE data links
- Industrial wireless gateways operating in extended temperature ranges (-40°C to 105°C)
- Enterprise Bluetooth mesh infrastructure (lighting, access control) where AEC-Q100 qualification is required
- Products needing backward compatibility with Classic Bluetooth hosts




Verdict


These chips serve different primary markets. Choose the EFR32BG22 for battery-powered BLE IoT applications where power efficiency, compact size, and hardware security are paramount. Choose the CYW20820 when automotive qualification, Bluetooth Classic backward compatibility, or industrial extended-temperature operation are required — trade-offs that the EFR32BG22 is not designed to meet.

  

  

  
  

  
  

    




  
Frequently Asked Questions


  

    
    

      
      

        
Our comparisons use verified datasheet specifications to create side-by-side tables. Each comparison includes a verdict explaining when to choose each option based on your project requirements.