nRF51802 Not Recommended for New Designs

Bluetooth Low Energy and 2.4 GHz SoC for cost-sensitive applications

The nRF51802 is a general purpose, ultra-low power SoC ideally suited for Bluetooth® Low Energy and 2.4 GHz proprietary wireless applications. It is built around the 32-bit ARM® Cortex™-M0 CPU with 256 KB flash + 16 KB RAM. The flexible 2.4 GHz radio supports Bluetooth Low Energy and 2.4 GHz proprietary protocols, such as Gazell.

It incorporates a rich selection of analog and digital peripherals that can interact directly without CPU intervention through the Programmable Peripheral Interconnect (PPI) system. Flexible GPIOs enables you to connect digital interfaces like SPI Master/slave, TWI Master and UART to any of the 31 GPIOs on the device.

The nRF51802 is a low cost variant of the nRF51822, it has the same functionality, but has minor performance degradation in terms of:

  • 2 dB less RX sensitivity
  • Slightly higher RX and TX peak currents

It is available in two packages:

  • 6 x 6 mm QFN48 with 31 GPIOs
  • 5 x 5 mm QFN32 with 16 GPIOs


Download zip filenRF51802-QxAA_Ref_Layout_

Key Features
Bluetooth 4.2
256 KB
16 KB

Relevant SDKs

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The Bluetooth LE and ANT software development kit

The nRF5 SDK is a high quality, thoroughly tested software development kit to accelerate your software development efforts for the nRF52 and nRF51 Series SoCs. It contains hundreds of useful firmware modules and examples to assist in building your application.

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