Chip vs Chip

ESP32-S3 vs DA14531

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Side-by-side comparison of ESP32-S3 and DA14531 BLE SoCs.

    
    

      
    

  


  
  
  

    
      

        A
        
ESP32-S3

      

      

    
    
      

        B
        
DA14531

      

      

    
  

  

  
  

  






  
  

    
ESP32-S3 vs DA14531: Dual-Core AI SoC vs World's Smallest BLE Chip


The ESP32-S3 and Dialog DA14531 represent the extreme poles of BLE silicon design. ESP32-S3 is Espressif's most powerful consumer IoT SoC — dual-core, AI-capable, camera-capable, Wi-Fi + BLE. DA14531 is Dialog's achievement in miniaturization — the world's smallest BLE chip, targeting disposable beacons, coin-cell tags, and sensor nodes where PCB area and power consumption are the binding constraints.




Overview


ESP32-S3 features dual 240 MHz Xtensa LX7 cores, 512 KB SRAM, Wi-Fi 4, BLE 5.0, vector ML extension, camera/display interfaces, USB OTG, and I2S audio — a rich SoC for feature-loaded products.


DA14531 is Dialog's (Renesas) 2 × 2 mm (WLCSP) BLE 5.1 SoC with a 16 MHz Cortex-M0+, 48 KB OTP Flash, 48 KB RAM, and a remarkable power profile: 1.5 µA in hibernation, ~1 mA BLE advertising, and operation from 1.1 V to 3.6 V — it can run directly from a nearly depleted CR2032. It targets beacons, asset tags, smart labels, disposable medical sensors, and industrial micro-sensor nodes.




Key Differences


    

  • Size: DA14531 is 2 × 2 mm (WLCSP) or 2.5 × 2.6 mm QFN24 — one of the smallest BLE SoCs available; ESP32-S3 is a 7 × 7 mm QFN56 or larger module.
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  • Power: DA14531 hibernation at 1.5 µA; ESP32-S3 light sleep at ~5–20 µA — an order-of-magnitude difference critical for coin-cell applications.
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  • CPU: DA14531 is a 16 MHz Cortex-M0+ — adequate for simple sensor tasks; ESP32-S3 is dual 240 MHz Xtensa LX7 for compute-intensive workloads.
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  • Wi-Fi: ESP32-S3 has 802.11n; DA14531 is BLE-only.
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  • Memory: DA14531 has 48 KB OTP Flash (no reprogram after factory) + 48 KB RAM; ESP32-S3 has 512 KB SRAM + external flash (fully reprogrammable).
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  • AI/ML: ESP32-S3 vector extension; DA14531 has no ML capability.
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  • Camera/Display: ESP32-S3 supports both; DA14531 has no video interfaces.
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  • Interfaces: DA14531 has limited I/O (SPI, I2C, UART, ADC) sufficient for a simple sensor; ESP32-S3 has a comprehensive peripheral set.
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Use Cases


Choose ESP32-S3 for cameras, voice assistants, multimedia hubs, AI inference at the edge, smart home devices, and any product where computational richness and Wi-Fi connectivity are requirements.


Choose DA14531 for disposable medical sensors, CR2032 coin-cell asset tags, smart labels (price tags, shelf labels), micro-beacons, wearable patches with a 1–3 year battery life goal, and any design where PCB real estate is measured in square millimeters.




Verdict


No product team should be debating between these chips — their design targets are orthogonal. DA14531 is the world's smallest BLE solution and is correct when the product must fit inside a button-cell housing. ESP32-S3 is a full-featured AI-capable IoT platform for complex, power-unconstrained applications. If your constraint is battery life and PCB area, DA14531; if it is compute power and connectivity breadth, ESP32-S3.

  

  

  
  

  
  

    




  
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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.