Chip vs Chip

BlueNRG-LP vs CYW20820

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Side-by-side comparison of BlueNRG-LP and CYW20820 BLE SoCs.

    
    

      
    

  


  
  
  

    
      

        A
        
BlueNRG-LP

      

      

    
    
      

        B
        
CYW20820

      

      

    
  

  

  
  

  






  
  

    
BlueNRG-LP vs CYW20820: Healthcare BLE vs Dual-Mode Automotive Bluetooth SoC


Overview


The ST BlueNRG-LP and Infineon's CYW20820 represent the low-power healthcare end and the dual-mode automotive end of the BLE SoC market spectrum. The BlueNRG-LP is a minimal, Cortex-M0+-based BLE SoC with sub-1 µA sleep current and a 3.2×3.2 mm footprint, purpose-built for medical wearables and disposable battery-powered sensors. The CYW20820 is a dual-mode Bluetooth (Classic + BLE 5.2) SoC with AEC-Q100 automotive qualification, targeting head units, telematics, and enterprise Bluetooth mesh deployments in harsh environments.


The BlueNRG-LP's integrated PMU (DC-DC + LDO) allows it to operate directly from a coin cell without external power components. Its architecture is deliberately minimal: enough Flash and RAM to run standard BLE health profiles, enough peripherals (SPI, I2C, UART) to interface with common sensors, and nothing more. This minimalism translates to a small die, low active power, and a clean radio performance profile suited to BLE 5.2 long-range coded PHY for challenging healthcare environments.


The CYW20820 integrates dual-mode Bluetooth — Classic BR/EDR for audio and legacy profiles alongside BLE 5.2 for low-power data. Its AEC-Q100 Grade 1 certification ensures reliable operation from -40°C to 105°C through automotive thermal cycles, a qualification requirement that consumer-grade chips like the BlueNRG-LP cannot meet. Infineon's WICED SDK supports Bluetooth mesh on the CYW20820, enabling factory and warehouse applications where large mesh networks of CYW20820 nodes provide sensor telemetry and asset tracking.




Key Differences


    

  • Radio: CYW20820 supports dual-mode Bluetooth Classic + BLE 5.2; BlueNRG-LP supports BLE 5.2 only — no Classic Bluetooth.
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  • Automotive qualification: CYW20820 is AEC-Q100 Grade 1 (-40°C to 105°C); BlueNRG-LP is a consumer/medical-grade part.
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  • Package size: BlueNRG-LP in 3.2×3.2 mm QFN32; CYW20820 in a larger automotive-grade package — significantly different footprints.
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  • Power: BlueNRG-LP's sub-1 µA sleep with integrated PMU is best-in-class for coin-cell IoT; CYW20820 is optimized for automotive operating conditions, not µA-class sleep.
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  • Core: BlueNRG-LP uses Cortex-M0+; CYW20820 uses an ARM Cortex-M4 — CYW20820 has substantially more compute throughput.
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  • Ecosystem: BlueNRG-LP uses cube.BlueNRG SDK (publicly available); CYW20820 uses Infineon's WICED SDK.
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  • Memory: BlueNRG-LP has 256 KB Flash / 64 KB RAM internally; CYW20820 supports external SPI Flash for larger firmware images.
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  • Security: BlueNRG-LP provides hardware AES-128/256; CYW20820 provides hardware security features oriented toward automotive content protection.
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Use Cases


BlueNRG-LP is ideal for:
- Continuous glucose monitors, heart rate monitors, ECG patches, and medical biosensors
- Disposable wearables with thin-film or coin-cell batteries requiring sub-µA sleep
- Ultra-compact PCB designs where 3.2×3.2 mm is a hard physical constraint
- Healthcare applications requiring simple, proven BLE health profiles at minimum cost


CYW20820 is ideal for:
- Automotive head units and telematics requiring Bluetooth Classic (HFP, A2DP) and BLE simultaneously
- Enterprise Bluetooth mesh for factory automation and building management
- Industrial sensors operating across -40°C to 105°C temperature ranges
- Applications needing backward compatibility with Bluetooth Classic legacy peripherals




Verdict


The BlueNRG-LP and CYW20820 serve completely different markets with no practical overlap. Medical wearables and ultra-low-power BLE sensing: choose the BlueNRG-LP. Automotive, dual-mode, and industrial extended-temperature applications: choose the CYW20820. Neither chip can substitute for the other in its respective primary use case.

  

  

  
  

  
  

    




  
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.