Chip vs Chip

ESP32-C3 vs DA14531

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Side-by-side comparison of ESP32-C3 and DA14531 BLE SoCs.

    
    

      
    

  


  
  
  

    
      

        A
        
ESP32-C3

      

      

    
    
      

        B
        
DA14531

      

      

    
  

  

  
  

  






  
  

    
Overview


The ESP32-C3 and DA14531 are at opposite ends of the BLE SoC spectrum in terms of capability and power consumption. The ESP32-C3 is a versatile, multiprotocol RISC-V chip combining Wi-Fi 4 and Bluetooth Low Energy 5.0, designed for connected IoT products where compute and connectivity flexibility are important. The DA14531 from Dialog Semiconductor (Renesas) is the smallest BLE SoC on the market—a 2 mm × 2 mm device designed from the ground up for disposable or ultra-miniature coin-cell-powered beacons, sensors, and tags where size and power consumption are the only design constraints that Thread/Wi-Fi." data-category="Protocols & Profiles">matter.




Key Differences


    

  • Form factor: DA14531 is available in a 2 mm × 2 mm WLCSP package—among the smallest BLE chips ever manufactured; ESP32-C3 is significantly larger in module form.
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  • Power consumption: DA14531 achieves approximately 1 µA average current in a typical BLE beacon application with a 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; ESP32-C3 draws 5 µA in deep sleep with RTC active, and significantly more during active BLE advertising.
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  • BLE version: DA14531 supports BLE 5.1; ESP32-C3 supports BLE 5.0.
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  • Wi-Fi: ESP32-C3 includes Wi-Fi 4; DA14531 has no Wi-Fi radio.
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  • Processor: DA14531 uses an ARM Cortex-M0+ at 16 MHz; ESP32-C3 uses a RISC-V core at up to 160 MHz—the ESP32-C3 has roughly 10× the compute capability.
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  • Memory: DA14531 has 48 KB SRAM and 128 KB OTP/ROM; ESP32-C3 has 400 KB SRAM and 4 MB flash—dramatically more.
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  • Coin cell operation: DA14531 is optimized for CR2032 coin cell operation and can achieve 10+ year battery life in low-duty-cycle beacon applications; ESP32-C3 is not designed for coin cell operation.
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  • Cost: DA14531 modules are ~$1.50–2.00 but targeted at volume beacon and tag use cases; ESP32-C3 is similarly priced but offers far more capability.
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Use Cases


Choose ESP32-C3 when:
- Wi-Fi+BLE co-existence is needed.
- Significant application-layer compute is required.
- Over-the-air firmware updates with HTTPS verification are needed.
- A full RTOS-based application stack must run on the chip.


Choose DA14531 when:
- Ultra-miniature form factor is a hard constraint (medical patches, hearing aids, disposable tags).
- 10+ year coin-cell battery life from a CR2032 is a product requirement.
- The application is a BLE beacon, proximity tag, or simple sensor with minimal compute.
- Board real estate is at an absolute premium.




Verdict


The DA14531 and ESP32-C3 target fundamentally different product requirements. Choose the DA14531 when miniaturization and multi-year coin-cell battery life are the dominant design constraints—no other BLE SoC matches its combination of 2 mm × 2 mm package and sub-µA average current. Choose the ESP32-C3 when compute capability, Wi-Fi connectivity, and firmware flexibility matter more than achieving the absolute minimum power and size. The two chips rarely compete directly; the DA14531's niche is beacon/tag/disposable, while the ESP32-C3's niche is connected IoT with meaningful compute requirements.

  

  

  
  

  
  

    




  
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.