Chip vs Chip

nRF5340 vs WBZ451

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Side-by-side comparison of nRF5340 and WBZ451 BLE SoCs.

    
    

      
    

  


  
  
  

    
      

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nRF5340

      

      

    
    
      

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WBZ451

      

      

    
  

  

  
  

  






  
  

    
nRF5340 vs WBZ451


The Nordic nRF5340 and Microchip WBZ451 both offer BLE 5.x with multi-protocol wireless, but they serve different ecosystems and design priorities. The nRF5340 is Nordic's flagship dual-core SoC in a Zephyr/nRF Connect ecosystem; the WBZ451 is Microchip's PIC-ecosystem BLE SoC targeting customers already invested in Microchip's MCU, MPLAB toolchain, and peripheral libraries.




Overview


Nordic nRF5340 combines two Arm Cortex-M33 cores — a 128 MHz application core and a 64 MHz network core — supporting BLE 5.3, Thread, Zigbee, and Bluetooth Mesh. Its dual-core architecture provides hardware isolation between the BLE stack and user application, with TrustZone and CryptoCell-312 for security. nRF Connect SDK (Zephyr RTOS) is the primary development environment. nRF5340 is widely used across medical devices, industrial IoT, and complex consumer electronics.


Microchip WBZ451 is a BLE 5.2 SoC integrating an Arm Cortex-M4 at 64 MHz alongside Microchip's PIC ecosystem integration. It supports BLE, Zigbee, and Thread, with Matter support added via firmware updates. The WBZ451 targets Microchip's existing customer base — engineers who use PIC32/SAM microcontrollers, MPLAB IDE, Harmony framework, and Microchip-certified wireless stacks. It is designed to ease the transition to wireless for embedded teams with deep Microchip experience.




Key Differences


    

  • Core architecture: nRF5340 dual Cortex-M33 (network + application isolation); WBZ451 single Cortex-M4 (combined application and wireless processing).
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  • Application core speed: nRF5340 M33 at 128 MHz vs WBZ451 M4 at 64 MHz. nRF5340 has significantly more application processing bandwidth.
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  • BLE version: nRF5340 supports BLE 5.3; WBZ451 supports BLE 5.2.
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  • LC3 codec and Auracast." data-category="LE Audio">LE Audio: nRF5340 has growing LE Audio support (LC3, Isochronous Channels, Auracast). WBZ451 has limited LE Audio ecosystem maturity.
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  • Security: nRF5340 provides TrustZone + CryptoCell-312. WBZ451 integrates Microchip's hardware security module with secure key storage, but without TrustZone core isolation.
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  • Memory: nRF5340 offers 1 MB + 512 KB app-side RAM. WBZ451 offers 1 MB Flash + 256 KB RAM.
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  • Ecosystem: nRF Connect SDK (Zephyr, open source, extensive BLE sample library) vs MPLAB Harmony (PIC ecosystem, strong MCU peripheral library).
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  • Multi-protocol: Both support BLE + Zigbee + Thread. nRF5340's dual-core provides better deterministic multi-protocol time-sharing.
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  • Power: Both achieve comparable deep-sleep currents (~1–2 µA). The WBZ451 is optimized for Microchip's low-power peripheral gating patterns.
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Use Cases


nRF5340 Strengths


    

  • High-performance connected applications: nRF5340's faster application core handles heavy processing alongside wireless communication.
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  • LE Audio and hearing aids: Mature LE Audio stack is a clear advantage where audio is a product feature.
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  • Security-critical designs: Hardware isolation via dual M33 cores and CryptoCell-312 provide the strongest security posture.
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  • Open-source ecosystem: Zephyr RTOS with a large community and rich BLE sample library accelerates development.
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WBZ451 Strengths


    

  • Microchip ecosystem integration: Teams using PIC32, SAM, or other Microchip MCUs gain wireless capability without leaving their familiar MPLAB/Harmony toolchain.
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  • Industrial PIC replacement: Products migrating from PIC-based wired designs to wireless can reuse peripheral code and drivers.
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  • Matter in Microchip deployments: WBZ451 with Matter over Thread is Microchip's path to smart home compatibility within their ecosystem.
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  • Mixed microcontroller + wireless projects: WBZ451's Cortex-M4 with Microchip's peripheral library suits applications combining complex peripheral management with BLE.
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Verdict


If your team works within the Microchip ecosystem with existing PIC/SAM experience and MPLAB toolchain investment, the WBZ451 reduces migration friction significantly. For all other use cases — particularly those requiring maximum application core performance, LE Audio, hardware security isolation, or access to the richest BLE sample library — the nRF5340 is the superior choice. The nRF5340's dual-core architecture and nRF Connect SDK are more capable and better documented for complex wireless application development.

  

  

  
  

  
  

    




  
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.