Bluetooth low energy and 2.4GHz proprietary SoC Active

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The nRF51822 is a powerful, highly flexible multi-protocol SoC ideally suited for Bluetooth® low energy and 2.4GHz ultra low-power wireless applications. The nRF51822 is built around a 32-bit ARM® Cortex™ M0 CPU with 256kB/128kB flash + 32kB/16kB RAM for improved application performance. The embedded 2.4GHz transceiver supports both Bluetooth low energy and the Nordic Gazell 2.4 GHz protocol stack which is on air compatible with the nRF24L series products from Nordic Semiconductor.

nRF51822 incorporates a rich selection of analog and digital peripherals that can interact without CPU intervention through the Programmable Peripheral Interconnect (PPI) system. A flexible 31-pin GPIO mapping scheme allows I/O like serial interfaces, PWM and quadrature demodulator to be mapped to any device pin as dictated by PCB requirements. This enables complete design flexibility associated with pin-out location and function.

nRF51822 supports Bluetooth low energy protocol stacks as well as 2.4GHz protocol stacks, including Gazell, both available as downloads. nRF51822 requires a single power supply and gives the user the option of using on chip linear regulators giving a supply range of 1.8-3.6V, a direct 1.8V mode and a on chip DC-DC buck converter giving a supply range of 2.1-3.6V. The use of the DC-DC converter can be dynamically controlled during run time and enables nRF51822 to operate at radio peak currents below 10 mA @ 3V supply (TX @ 0 dBm & RX).

nRF51 SDK provides extensive software support for both Bluetooth low energy and 2.4GHz proprietary applications.

nRF51822 is available in 6x6mm 48-pin QFN packages and 3 ultra-compact wafer-level chip-scale packages (WL-CSP).

New: nRF51822 is now available as a thin WL-CSP variant measuring 3.83mm x 3.83mm with a height profile of just 0.35mm, and is drop in compatible with regular WL-CSP devices.

nRF51822 is available in either 256kB or 128kB Flash + 32kB or 16kB RAM variants.

Nordic Semiconductor protocol stacks are known as SoftDevices. SoftDevices are pre-compiled, pre-linked binary files. SoftDevices can be programmed in nRF51 series SoCs and are downloadable from the Nordic website.

Symmetry Electronics is an authorized Nordic Semiconductor distributor.


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Single chip, highly flexible, 2.4 GHz multi-protocol device
32-bit ARM Cortex M0 CPU core
256kB/128kB flash + 32kB/16kB RAM
Supports Bluetooth low energy protocol stacks
Thread safe and run-time protected
Event driven API
On air compatible with nRF24L series
3 data rates (2Mbps/1Mbps/250kbps)
+4dBm output power
-93dBm sensitivity, Bluetooth low energy
PPI system for maximum power-efficient applications and code simplification
Flexible power management system with automatic power management of each peripheral
Configurable I/O mapping for analog and digital I/O
Operating temperature range: -40C to +105C


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