2.4GHZ RF System-on-Chip (SoC) with OTP and USB


The nRF24LU1+ OTP is highly integrated, lower cost, ultra low power (ULP) 2.4GHz RF SoC for the 2.4GHz ISM (Industrial, Scientific and Medical) band. It includes a 2.4GHz RF transceiver core, 8-bit CPU, full-speed USB 2.0 device controller, and embedded OTP (One Time Programmable) memory. In addition, an integrated voltage regulator enables the nRF24LU1+ OTP to be powered directly from the USB VBUS making it ideally suited for ultra compact USB dongles for wireless peripherals.

In summary, the Nordic nRF24LU1+ OTP integrates an nRF24L01+ 2.4GHz RF transceiver core, enhanced 16MHz 8-bit 8051 compatible CPU, 2kB + 256B RAM, 17kB embedded OTP, a full-speed USB 2.0-compliant device controller, plus a range of system peripherals including a hardware AES co-processor.

The nRF24LU1+ OTP is available in a 5 x 5mm 32-pin QFN package with 6 generic I/O pins.


  • Low cost, single chip solution for compact 2.4GHz USB dongles
  • Low cost BoM – powers directly from the USB VBUS and requires only a single low cost 16MHz ±60ppm crystal
  • Integrates nRF24L01+ radio core, enhanced 8051 CPU, 17KB OTP memory, plus a Full-speed USB 2.0-compliant device controller
  • Drop-in compatible with Nordic nRF24LU1+ Flash memory variant
  • Fully on-air compatible with all nRF24L Series, as well as nRF24E and nRF240 Series


  • Compact USB dongles for 2.4GHz RF wireless peripherals
  • Embedded 2.4GHz RF wireless connectivity

Related Products

Product Brief description
nRF24LU1+ Drop-in compatible Flash variant
nRF24LE1 2.4GHz RF System-on-Chip with Flash
nRF24LE1 OTP 2.4GHz RF System-on-Chip with OTP
nRF24L01+ Ultra low power 2.4GHz RF Transceiver IC

Ordering codes



The Nordic nRF24LU1+ OTP is highly integrated, ultra low power 2.4GHz RF System-on-Chip (SoC) for 2.4GHz ISM band operation.

Low power consumption

  • 500µA standby mode
  • 3.0mA USB active
  • 6.3mA active mode with CPU at 16MHz
  • 11.1mA Radio TX at 0dBm
  • 13.3mA Radio RX at 2Mbps on-air data-rate


2.4GHz Radio

  • 2.4GHz ISM band operation
  • GFSK modulation, 1 or 2MHz bandwidth
  • 0, -6, -12, and -18dBm programmable TX output power
  • Configurable on-air data rate of 250kbps, 1Mbps, or 2Mbps
  • -94dBm RX sensitivity a 250kbps
  • -82dBm RX sensitivity at 2Mbps
  • -85dBm RX sensitivity at 1Mbps
  • Excellent co-existence performance
  • Compatible with a 16MHz ±60ppm crystal


Enhanced ShockBurst™ hardware protocol accelerator

  • Automatic packet assembly
    (Preamble, Address, CRC)
  • Automatic packed detection and validation
  • Dynamic payload length, 1 to 32Bytes
  • Auto retransmit
  • Auto Acknowledgment with optional payload
  • 6 data pipe MultiCeiver™
  • 3 separate 32Byte TX and RX FIFOs


Processor and Memory

  • 8-bit enhanced 8051 CPU
  • Reduced instruction cycle time
  • Up to 16MHz operation
  • 32-bit multiplication/division unit
  • 2kB SRAM + 256B IRAM
  • 16kB program OTP memory
  • 1kB data OTP memory


USB Device Controller

  • Full-speed USB 2.0 compliant
  • Up to 12Mbps
  • 5 input and 5 output Bulk/Interrupt endpoints
  • 1 input and 1 output double buffered iso-synchronous endpoints
  • Endpoint 0 for control
  • 512B endpoint RAM
  • On-chip programmable pull-up resistor for D+


Oscillators, PLLs and Timers

  • 16MHz XO
  • 48MHz PLL
  • 24-bit RTC
  • 3x 16-bit timer/counters


System Peripherals

  • 128-bit AES co-processor


Digital I/O

  • SPI Master/Slave
  • UART



  • 6 GPIO pins
  • Configurable type, direction, drive strength, and pull up/down
  • Configurable pin to I/O peripheral assignment


Power supply

  • Internal linear voltage regulator
  • 4.0 to 5.25V supply range
  • Powers directly from USB VBUS

Temperature range of -40 to +80 ºC

Package options

  • 32-pin 5 x 5mm QFN
Development Tools and Software


The Nordic nRF24LU1+ OTP is supported by the following development tools and software:

Product Brief description
nRF24LU1+ Development Kit nRFgo Development Kit for nRF24LU1+ Flash/OTP
nRFgo Starter Kit Common development platform for Nordic’s wireless ICs
nRFgo SDK Software development kit for nRF24L Series 2.4GHz SoCs
nRFgo Studio PC application for configuring and evaluating Nordic nRF24L Series SoCs
nRF24LU1+ Programming Kit Flash/OTP programming nRFgo add-on with socket for programming of un-mounted nRF24LU1+ OTP/Flash ICs
Reference Designs


The Nordic nRF24LU1+ OTP is supported by the following reference designs:

Part # Brief description
nRFready Desktop Wireless mouse, keyboard and remote control reference design
nRFready Basic Remote RF remote control reference design
nRFready R/C Racing RF remote controller toy reference design

Product Specification

Code Name Version
nRF24LU1P-O-PS nRF24LU1+ OTP Product Specification 1.0
PCN-059 Product Change Notification - Cu as additional bond wire option 1.0
PCN-075 Product Change Notification 1_0
PCN-094 Change on outer box container for trays and 7” reels 1.0

Application Notes

Code Name Version
nAN-15 Creating Applications with the Keil C51 C Compiler 1.1
nAN-20 Using external, non-volatile memory with the nRF24LE1 [Firmware included] 1.0
nAN24-08 nRF Performance Test Instructions 1.1
nAN24-12 Software examples using ShockBurst modes in nRF24L01 and nRF24LU1 2.1
nAN24-14 Using flash devices as development platforms for OTP devices 1.0
nAN400-08 QFN Soldering Reflow Guidelines 1.2

White Papers

Code Name Version
nWP-001 Benefits of Total Integration of Large RF Circuits
nWP-005 Introduction to wireless networks
nWP-006 nRF Performance Test Guidelines 1.0
nWP-008 Quarterwave printed monopole antenna for 2.4GHz
nWP-010 Regulatory and Compliance Standards for RF Devices
nWP-011 Sharing crystal with a microcontroller (MCU) 1.1
nWP-013 Tuning the nRF24xx matching network
nWP-014 USB Certification Guidelines
nWP-015 Crystal Oscillator Design Considerations
nWP-017 Antenna tuning 1.0