Chip vs Chip

nRF54L15 vs DA14531

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Side-by-side comparison of nRF54L15 and DA14531 BLE SoCs.

    
    

      
    

  


  
  
  

    
      

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nRF54L15

      

      

    
    
      

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DA14531

      

      

    
  

  

  
  

  






  
  

    
nRF54L15 vs DA14531


The Nordic nRF54L15 and Dialog Semiconductor (Renesas) DA14531 represent different design philosophies in ultra-low-power BLE. The nRF54L15 is a capable, next-generation BLE 5.4 SoC; the DA14531 is arguably the world's smallest and lowest-power BLE 5.1 SoC, built for a very specific niche: tiny, disposable, or minimally-featured BLE beacons and sensors.




Overview


Nordic nRF54L15 is the nRF52840 successor: Cortex-M33 + RISC-V, BLE 5.4, generous Flash/RAM, rich peripherals, and a full application development environment. It is designed for capable, feature-rich BLE edge devices.


Dialog DA14531 (and its companion DA14531-00 MOD module) is Dialog's "world's smallest BLE SoC." It features a 16 MHz Cortex-M0+ application core, BLE 5.1, 48 KB Flash + 64 KB OTP, and 12 KB RAM. Its die is tiny, its power consumption is extraordinary (advertiser mode current as low as 1.1 µA at 100 ms advertising-interval/" class="glossary-term-link" data-term="advertising interval" data-definition="Time between BLE advertising events." data-category="GAP & Advertising">advertising interval), and it is designed for disposable sensors, miniature beacons, single-use medical devices, and coin-cell-powered trackers with minimal application complexity.




Key Differences


    

  • BLE version: nRF54L15 supports BLE 5.4 with Channel Sounding; DA14531 supports BLE 5.1.
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  • CPU: nRF54L15 uses M33 at 128 MHz; DA14531 uses M0+ at 16 MHz. DA14531 is intentionally limited — it is not designed for complex application processing.
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  • Memory: nRF54L15 has substantial Flash and RAM. DA14531 has 48 KB Flash + 12 KB RAM — enough for a simple BLE sensor application but little more.
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  • Power: DA14531 is extraordinarily optimized for advertising-only scenarios — 1.1 µA in advertiser mode is a class-leading figure. nRF54L15 targets competitive ultra-low power but for richer application profiles.
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  • Form factor: DA14531 is available in a 2.0 × 1.7 mm WLP package — one of the smallest BLE SoC packages available. nRF54L15 is larger.
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  • Peripherals: DA14531 has a 10-bit ADC, SPI, I2C, UART, and GPIO — minimal but sufficient for a sensor node. nRF54L15 has a much richer peripheral set.
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  • Application complexity: DA14531 is appropriate for simple data broadcasting or small ATT">GATT servers. nRF54L15 can run complex application logic, multi-service GATT servers, OTA DFU, and more.
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  • Security: nRF54L15 has TrustZone on M33. DA14531 has hardware AES and OTP for key storage, appropriate for standard BLE LESC pairing.
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  • Ecosystem: DA14531 uses Dialog SmartBond TINY SDK. nRF54L15 uses nRF Connect SDK (Zephyr).
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Use Cases


nRF54L15 Strengths


    

  • Feature-rich BLE peripheral applications: GATT servers with multiple services, OTA firmware updates, complex sensor fusion, and LC3 codec and Auracast." data-category="LE Audio">LE Audio are all within nRF54L15's capability.
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  • BLE 5.4 Channel Sounding: Proximity ranging applications unavailable on DA14531.
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  • Longer software lifecycle: Rich SDK, OTA DFU, and ability to update application logic in the field.
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  • Security-critical applications: TrustZone and certified BLE stack for regulated medical and industrial devices.
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DA14531 Strengths


    

  • Absolute minimal power beaconing: For devices that only advertise a few bytes at low intervals and nothing else, DA14531's 1.1 µA advertising current may enable 5–10+ years on a coin cell.
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  • Disposable medical devices: Single-use temperature loggers, glucose strips with wireless capability, and disposable smart labels benefit from DA14531's tiny die cost.
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  • Ultra-miniature form factor: 2.0 × 1.7 mm WLP fits in products where nRF54L15 physically cannot — hearing aid batteries, micro-patches, smart card inlays.
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  • Low BOM cost: DA14531's simplicity minimizes external components and die cost for high-volume, low-complexity beacons.
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  • iBeacon and Eddystone deployments: Simple beacon applications requiring only advertising — no connections — are ideal for DA14531.
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Verdict


The DA14531 is an extremely specialized SoC for the smallest, simplest, lowest-power BLE applications — it is not a general-purpose BLE chip. If your application is essentially "broadcast a few bytes from a coin cell for as long as possible in the smallest possible form factor," the DA14531 may be unbeatable. For anything requiring a full BLE application stack, OTA updates, significant application processing, BLE 5.4 features, or TrustZone security, the nRF54L15 is the correct choice.

  

  

  
  

  
  

    




  
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.