Chip vs Chip

nRF54L15 vs EFR32MG24

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Side-by-side comparison of nRF54L15 and EFR32MG24 BLE SoCs.

    
    

      
    

  


  
  
  

    
      

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nRF54L15

      

      

    
    
      

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EFR32MG24

      

      

    
  

  

  
  

  






  
  

    
nRF54L15 vs EFR32MG24


The Nordic nRF54L15 and Silicon Labs EFR32MG24 are both multi-protocol-capable BLE SoCs, but they differ significantly in protocol breadth and capability tier. The nRF54L15 is a next-generation ultra-low-power BLE 5.4 SoC; the EFR32MG24 is Silicon Labs' premium multi-protocol + AI-capable SoC targeting Thread/Wi-Fi." data-category="Protocols & Profiles">Matter, Zigbee, Thread, and BLE simultaneously.




Overview


Nordic nRF54L15 is a dual-core (M33 + RISC-V) BLE 5.4 SoC designed for ultra-low power. It supports BLE and DECT NR+ but lacks IEEE 802.15.4 hardware, limiting its multi-protocol versatility compared to the MG24.


Silicon Labs EFR32MG24 (Multiprotocol Gecko 24) is a 78 MHz Cortex-M33 SoC with Secure Vault Mid (PSA Level 3), an AI/ML hardware accelerator (MVP), and a dual-band radio supporting BLE 5.3, Thread, Zigbee, Matter, and proprietary 2.4 GHz simultaneously. It is positioned as Silicon Labs' flagship for premium smart home and industrial IoT multi-protocol applications.




Key Differences


    

  • Multi-protocol: EFR32MG24 supports BLE + Thread + Zigbee + Matter (802.15.4). nRF54L15 supports BLE + DECT NR+ only — no 802.15.4.
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  • BLE version: nRF54L15 supports BLE 5.4 with Channel Sounding; EFR32MG24 supports BLE 5.3.
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  • AI/ML accelerator: EFR32MG24 has the MVP hardware accelerator for on-device AI inference. nRF54L15 has no dedicated ML hardware.
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  • Security: EFR32MG24 achieves PSA Certified Level 3 (Secure Vault Mid) — the highest level commercially available on MCU-class devices. nRF54L15 targets PSA Level 2 equivalent security.
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  • CPU architecture: nRF54L15 dual-core (M33 + RISC-V) with BLE protocol stack on RISC-V. EFR32MG24 single Cortex-M33 with radio stack managed in firmware.
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  • Power: nRF54L15 is purpose-built for ultra-low power in BLE-first scenarios. EFR32MG24 is power-efficient but its multi-protocol capability comes with higher active-mode current.
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  • Memory: EFR32MG24 offers up to 1.5 MB Flash + 256 KB RAM. nRF54L15 is designed for embedded use with competitive memory.
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  • Cost: nRF54L15 targets competitive pricing as a flagship-generation device. EFR32MG24 is priced at the premium multi-protocol tier.
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  • Ecosystem: Both have mature SDKs. Silicon Labs Simplicity Studio + GSDK vs nRF Connect SDK (Zephyr).
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Use Cases


nRF54L15 Strengths


    

  • Ultra-low-power BLE-only products: Wearables and sensors needing the best possible battery life with BLE 5.4.
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  • BLE 5.4 Channel Sounding: Precision ranging unavailable on EFR32MG24.
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  • LC3 codec and Auracast." data-category="LE Audio">LE Audio: nRF54L15's BLE 5.4 generation includes fuller LE Audio stack support.
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  • Smaller, simpler BLE products: When 802.15.4 and AI are not required, nRF54L15 provides better BLE without the cost of multi-protocol and AI hardware.
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EFR32MG24 Strengths


    

  • Matter native: All three Matter transports (BLE commissioning + Thread + Wi-Fi via companion) in one chip — EFR32MG24 is positioned as a leading Matter SoC.
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  • Zigbee + Thread + BLE concurrent: Building automation and smart home products that need all three protocols simultaneously.
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  • On-device AI inference: Keyword spotting, gesture detection, anomaly detection using the MVP hardware accelerator.
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  • PSA Level 3 security: The highest commercially available PSA security level — required by some industrial and critical infrastructure certifications.
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  • Established Matter certification pipeline: Silicon Labs has extensive Matter certification support for EFR32MG24.
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Verdict


The nRF54L15 wins for dedicated BLE 5.4 applications requiring Channel Sounding, LE Audio, ultra-low power, and straightforward BLE + DECT NR+ connectivity without the overhead of multi-protocol 802.15.4 stacks. The EFR32MG24 wins for products requiring IEEE 802.15.4 multi-protocol (Thread + Zigbee concurrent operation), Matter certification, PSA Level 3 security attestation, or on-device AI inference via the MVP hardware accelerator.


The nRF54L15 cannot implement Matter over Thread without an external IEEE 802.15.4 radio — this is a hard architectural limitation. If Thread is a firm requirement, the EFR32MG24 is necessary. Conversely, if BLE Channel Sounding — for sub-meter digital keys or precise proximity detection — is a product requirement, only BLE 5.4 silicon like the nRF54L15 can deliver it. Evaluate your protocol requirements first: BLE 5.4 features + battery life → nRF54L15; Thread/Zigbee + Matter + AI → EFR32MG24.

  

  

  
  

  
  

    




  
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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.