Chip vs Chip

nRF52832 vs nRF5340

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Side-by-side comparison of nRF52832 and nRF5340 BLE SoCs.

    
    

      
    

  


  
  
  

    
      

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nRF52832

      

      

    
    
      

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nRF5340

      

      

    
  

  

  
  

  






  
  

    
nRF52832 vs nRF5340: Entry BLE vs Nordic's Dual-Core Security Platform


The nRF52832 is Nordic's reliable mid-range single-core BLE SoC; the nRF5340 is a fundamentally different dual-core architecture designed for demanding IoT applications requiring real-time BLE processing, advanced security, and high-bandwidth peripherals. The comparison reveals a generational leap in capability.




Overview


Nordic nRF52832 delivers a single ARM Cortex-M4F at 64 MHz with 512 KB Flash, 64 KB RAM, and BLE 5.0. Its simplicity is a feature: a single core running a SoftDevice BLE stack and application simultaneously, with well-understood interrupt latency and power behavior. The chip has been in production since 2015 with millions of units shipped across medical, fitness, and industrial categories.


Nordic nRF5340 introduces a dual-core architecture: a 128 MHz Cortex-M33 application core and a 64 MHz Cortex-M33 network core. The network core runs the BLE 5.3 stack (or IEEE 802.15.4 for Thread/Zigbee) in isolation, freeing the application core for user logic. This separation enables deterministic radio timing regardless of application load. The nRF5340 has 1 MB application Flash + 256 KB network Flash, 512 KB application RAM + 64 KB network RAM, Arm TrustZone for hardware-enforced security domains, and supports BLE 5.3 features including enhanced ATT (EATT) for parallel GATT operations.




Key Differences


    

  • Core architecture: nRF5340 has two independent M33 cores; nRF52832 has one M4F core handling both radio and application.
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  • Security: nRF5340 includes Arm TrustZone, CryptoCell-312 hardware crypto accelerator, key management unit (KMU), and secure boot — far exceeding nRF52832's basic AES hardware.
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  • BLE version: nRF5340 supports BLE 5.3 with EATT and extended features; nRF52832 supports BLE 5.0.
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  • Memory: nRF5340 application core has 1 MB Flash and 512 KB RAM — 2x and 8x the nRF52832 respectively.
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  • Peripherals: nRF5340 adds high-speed SPI (32 MHz), quad-SPI for external Flash, USB FS, and dual CAN-FD interfaces.
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  • Power: nRF5340 application core has a lower sleep current (2.6 µA with RAM retention) but higher active current due to dual-core complexity.
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  • Development: nRF5340 requires nRF Connect SDK (Zephyr RTOS); nRF52832 supports both legacy nRF5 SDK and nRF Connect SDK.
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  • Price: nRF5340 commands a 50-80% price premium over nRF52832 in volume.
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Use Cases


When nRF52832 Excels


    

  • Simple BLE sensors and beacons: Temperature loggers, asset tags, and fitness monitors where BLE 5.0 features are sufficient and security requirements are basic.
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  • Battery-powered peripherals: Designs optimized around a single coin cell where the nRF52832's sleep current and predictable power behavior are advantageous.
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  • Legacy compatibility: Products built on existing nRF5 SDK codebases benefit from the nRF52832's continued support.
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  • Cost-sensitive volume production: At scale, the nRF52832's lower price per unit translates to meaningful BOM savings.
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When nRF5340 Excels


    

  • Security-sensitive applications: Smart locks, medical devices, industrial controllers, and payment accessories requiring hardware-enforced security domains and attestation.
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  • Complex concurrent BLE connections: EATT enables simultaneous GATT operations across multiple connections — critical for BLE audio (LC3 codec and Auracast." data-category="LE Audio">LE Audio / Auracast) and multi-peripheral hubs.
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  • Real-time applications: Separating the BLE stack onto a dedicated core eliminates radio-vs-application core conflicts, achieving deterministic latency.
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  • LE Audio and Bluetooth 5.3: Hearing aids, earbuds, and broadcast audio devices leveraging Isochronous Channels (ISO) and LC3 codec.
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  • IoT gateways: Devices acting as a BLE central for multiple peripherals while running cloud connectivity logic on the application core.
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Verdict


The nRF52832 and nRF5340 serve different tiers of BLE product complexity. If your application fits within BLE 5.0, 512 KB Flash, and 64 KB RAM — and security requirements are manageable at the application layer — the nRF52832 delivers exceptional value with a mature, proven toolchain. The nRF5340 is the right choice when you need hardware security isolation, BLE 5.3 features like LE Audio or EATT, dual-core radio/application separation, or a substantially larger memory footprint. It is Nordic's platform of choice for premium IoT and hearable products heading into the mid-2020s.

  

  

  
  

  
  

    




  
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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.