2.4GHz RF


2.4GHz RF System-on-Chip (SoC) with OTP


The nRF24LE1 OTP is highly integrated and low 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, and embedded OTP (One Time Programmable) memory. With peak RX/TX currents lower than 14mA, a sub μA power down mode, advanced power management, and a 1.9 to 3.6V supply range, the nRF24LE1 OTP provides a true ULP solution enabling months to years of battery lifetime from coin cells or AA/AAA batteries. In addition, a rich set of on-chip analog and digital peripherals make the nRF24LE1 OTP single chip solution ideal for an extensive range of applications including PC peripherals, gaming controllers, remote controls, sports/fitness/healthcare sensors, and toys.

In summary, the nRF24LE1 OTP integrates an nRF24L01+ 2.4GHz RF transceiver core, enhanced 16MHz 8-bit 8051 compatible CPU, 1kB + 256B RAM, 16kB embedded OTP, and a wide range of system peripherals including a hardware AES accelerator, 16MHz and 32kHz RC oscillators, ULP 32kHz crystal oscillator, 12-bit ADC, plus SPI, 2-wire, and UART serial interfaces.

The nRF24LE1 OTP is available in 3 different package options:

  • 4 x 4mm 24-pin QFN with 7 generic I/O pins
  • 5 x 5mm 32-pin QFN with 15 generic I/O pins
  • 7 x 7mm 48-pin QFN with 31 generic I/O pins


  • Single chip solution - highly integrated 2.4GHz RF SoC with OTP
  • Ultra low power consumption – up to years of battery lifetime
  • nRF24L01+ radio core, enhanced 8051 CPU, and 16kB OTP memory
  • Rich set of on-chip analog and digital peripherals support a wide range of applications
  • Drop-in compatible with the Nordic nRF24LE1, a more flexible embedded flash variant
  • Fully on-air compatible with all nRF24L Series, as well as nRF24E and nRF240 Series


  • PC peripherals
  • Gaming
  • Sports and fitness
  • Toys
  • Consumer electronics

Related Products

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

Ordering codes


The nRF24LE1 OTP is highly integrated and low cost, ultra low power (ULP) 2.4GHz RF System-on-Chip (SoC) for 2.4GHz ISM band operation.

Ultra low power consumption

  • 500nA deep sleep mode
  • 1.0µA memory retention mode
  • 1.6µA memory retention with 32kHz XO mode
  • 2µA register retention mode
  • 3.0µA register retention with 32kHz XO mode
  • 2.5mA active mode with CPU at 8MHz
  • 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 16MHz ±60ppm crystals


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
  • 1KB SRAM + 256B IRAM
  • 16KB program OTP
  • 1KB data OTP


Oscillators and Timers

  • 16MHz XO
  • 16MHZ RC
  • 32kHz XO
  • 32kHz RC
  • 24-bit RTC
  • 3x 16-bit timer/counters


System Peripherals

  • 8 x 8 Galois Field Multiplier for AES acceleration
  • Random Number Generator


Digital I/O

  • SPI Master/Slave
  • 2-wire Master/Slave
  • UART


Analog I/O

  • 6 to 12-bit ADC with up to 14 input channels
  • Analog comparator



  • Up to 31 GPIO pins
  • Configurable type, direction, drive strength, and pull up/down
  • Configurable pin to I/O peripheral assignment


Power supply

  • Internal linear voltage regulator
  • 1.9 to 3.6V supply range


Temperature range of -40 to +80 ºC

Package options

  • 24-pin 4 x 4mm QFN (7 GPIO)
  • 32-pin 5 x 5mm QFN (15 GPIO)
  • 48-pin 7 x 7mm QFN (31 GPIO)
Development Tools and Software


The Nordic nRF24LE1 OTP is supported by the following development tools and software:



Product Brief description
nRF24LE1 Development Kit nRFgo Development Kit for nRF24LE1 OTP/Flash
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 configuration and evaluation of nRF24L series SoCs
nRF24LE1 Programming Kit Flash/OTP programming nRFgo add-on with socket for programming of un-mounted nRF24LE1 OTP/Flash ICs
Reference Designs


The Nordic nRF24LE1 OTP is supported by the following reference designs:


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



Product Specification

Code Name Version
nRF24LE1-O-PS nRF24LE1 OTP Product Specification 1.2
PAN-018 nRF24LE1 OTP Product Anomaly Notice 4.1
PCN-059 Product Change Notification - Cu as additional bond wire option 1.0
PCN-061 nRF24LE1 OTP Product Change Notification 1.0
PCN-064 Product Change Notification affecting nRF24LE1 OTP Build Code N (ASE) 1.0
PCN-075 Product Change Notification 1_0
PCN-086 Change in Seven Inch Plastic Reel 1.0
PCN-094 Change on outer box container for trays and 7” reels 1.0

Reference Layout

Code Name Version
nRF24LE1-Q24-DF Design Files for nRF24LE1 Q24 package
nRF24LE1-Q32-DF Design Files for nRF24LE1 Q32 package
nRF24LE1-Q48-DF Design Files for nRF24LE1 Q48 package

Application Notes

Code Name Version
nAN-15 Creating Applications with the Keil C51 C Compiler 1.1
nAN-19 nAN-19 nRF24LE1 with support for infrared protocols 1.0
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
nAN24-13 How to measure crystal start up time for nRF24LE1 1.0
nAN24-14 Using flash devices as development platforms for OTP devices 1.0
nAN24-17 Using a 2450BM14A0002 Balun with nRF24LE1 QFN32 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-015 Crystal Oscillator Design Considerations
nWP-017 Antenna tuning 1.0