Description
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.
Features
- 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
Applications
- 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
GPIO
- 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
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 |
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 |