CC2431 is not recommended for new designs.
This product continues to be in production to support existing customers. Please consider one of these alternatives:
Similar but not functionally equivalent to the compared device:
CC2531 ACTIVE Zigbee and IEEE 802.15.4 wireless MCU with up to 256kB Flash and 8kB RAM This product offers a 256KB RAM option, lower power, improved sensitivity, and up-to-date software support but does not provide an on board location feature.

Product details


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  • Location Engine calculates the location of a node in a network
  • High performance and low power 8051 microcontroller core.
  • 2.4 GHz IEEE 802.15.4 compliant RF transceiver (industry leading CC2420 radio core.
  • ZigBee® protocol stack (Z-Stack™) from Texas Instruments includes support for CC2431’s location engine.
  • Excellent receiver sensitivity and robustness to interferers
  • 128 KB in-system programmable flash
  • 8 KB RAM, 4 KB with data retention in all power modes
  • Powerful DMA functionality
  • Very few external components
  • Only a single crystal needed for mesh network systems
  • Low current consumption (RX: 27mA, TX: 27mA, microcontroller running at 32 MHz)
  • Only 0.5µA current consumption in power-down mode, where external interrupts or the RTC can wake up the system
  • 0.3µA current consumption in power-down mode, where external interrupts can wake up the system
  • Very fast transition times from low-power modes to active mode enables ultra low average power consumption in low duty-cycle systems
  • CSMA/CA hardware support
  • Wide supply voltage range (2.0V - 3.6V)
  • Digital RSSI / LQI support
  • Battery monitor and temperature sensor
  • ADC with up to eight inputs and configurable resolution
  • 128-bit AES security coprocessor
  • Two powerful USARTs with support for several serial protocols.
  • Hardware debug support
  • Watchdog timer
  • One IEEE 802.15.4 MAC Timer, one general 16-bit timer and two 8-bit timers
  • RoHS compliant 7x7mm QLP48 package
  • 21 general I/O pins, two with 20mA sink/source capability
  • Powerful and flexible development tools available
  • Applications
    • ZigBee® systems
    • 2.4 GHz IEEE 802.15.4 systems
    • Home/building automation
    • Industrial Control and Monitoring
    • Low power wireless sensor networks
    • Access Control
    • PC peripherals
    • Set-top boxes and remote controls
    • Consumer Electronics
    • Container/Vehicle Tracking
    • Active RFID
    • Inventory Control

open-in-new Find other Zigbee products


The CC2431 is a true System-On-Chip (SOC) for wireless sensor networking ZigBee®/IEEE 802.15.4 solutions. The chip includes a location detection hardware module that can be used in so-called blind nodes (i.e. nodes with unknown location) to receive signals from nodes with known location’s. Based on this the location engine calculates an estimate of a blind node’s position. The CC2431 enables ZigBee® nodes to be built with very low total bill-of-material costs. The CC2431 combines the excellent performance of the leading CC2420 RF transceiver with an industry-standard enhanced 8051 MCU, 128 KB flash memory, 8 KB RAM and many other powerful features. Combined with the industry leading ZigBee® protocol stack (Z-Stack™) from Texas Instruments, the CC2431 provides the market’s most competitive ZigBee® solution.

The CC2431 is highly suited for systems where ultra low power consumption is required. This is achieved by various operating modes. Short transition times between these modes further ensure low power consumption.

open-in-new Find other Zigbee products

Technical documentation

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Type Title Date
* Data sheet System-on-Chip for 2.4 GHz ZigBee(TM) /IEEE 802.15.4 with Location Engine datasheet (Rev. B) Jun. 15, 2007
* Errata CC2430, CC2431 Errata Note Jul. 26, 2007
* Radiation & reliability report CC2430/CC2431 Reliability Report (Rev. A) Dec. 04, 2007
Technical article Bluetooth® Low Energy shifts gears for car access Jul. 15, 2019
Selection guide Zigbee® Selection Guide for SimpleLink MCUs (Rev. F) Feb. 21, 2019
Application note 2.4-GHz Inverted F Antenna (Rev. D) Jan. 07, 2019
Technical article An out-of-the-box Internet of Things: building a seamless and secure smart home network Jun. 12, 2018
Technical article Thread vs. Zigbee – what’s the difference? May 16, 2018
Technical article Your microcontroller deserves a nap – designing “sleepy” wireless applications Mar. 28, 2018
Application note DN035 -- Antenna Quick Guide (Rev. A) Feb. 12, 2013
Application note AN098 - Layout Review Techniques for Low Power RF Designs (Rev. A) Aug. 02, 2012
Application note DN034 -- YAGI 2.4 GHz PCB Antenna Oct. 14, 2010
Application note AN058 -- Antenna Selection Guide (Rev. B) Oct. 06, 2010
Application note DN031 -- CC-Antenna-DK Documentation and Antenna Measurements Summary Aug. 26, 2010
Application note DN117 -- SimpliciTI-compatible UART Driver Sep. 22, 2009
Application note DN112 -- Using UART in CC111xFx CC243x CC251xFx and CC253xFx (Rev. B) Aug. 11, 2009
Application note DN113 CC111xFx CC243xFx CC251xFx CC253xFx SPI Interface (Rev. A) Aug. 11, 2009
Application note DN116 -- Clearing Module Interrupt Flags in LPW SoC Devices Aug. 03, 2009
Application note DN115 -- Using PWM for Dimmer Function in LED Lighting Jun. 16, 2009
Application note DN300 -- SmartRF04EB Troubleshooting (Rev. B) Mar. 24, 2009
Application note AN040 - Folded dipole antenna for CC2400, CC2420, CC2430/31 and CC2480 (Rev. D) Apr. 04, 2008
Application note AN043 -- Small Size 2.4 GHz PCB Antenna (Rev. D) Apr. 04, 2008
Application note AN048 -- 2.4GHz Chip Antenna (Rev. B) Mar. 04, 2008
Application note DN020 -- Programming Output Power on CC2430 Dec. 21, 2007
User guide CC2400EM Folded Dipole Reference Design Oct. 26, 2007
Application note DN101 -- Using the ADC to Measure Supply Voltage (Rev. A) Oct. 22, 2007
Application note DN102 -- SoC Temperature Sensor (Rev. A) Oct. 22, 2007
More literature CC2431 Material content Jul. 16, 2007
More literature CC2431 RoHS Confirmation Jan. 31, 2006

Design & development

For additional terms or required resources, click any title below to view the detail page where available.

Hardware development


The CC2520EMK is an ad-on development kit for CC2520DK. The full stand-alone development kit is CC2520DK. The CC2520EMK development kit consists of 2 CC2520EM plug in modules and 2 antennas. The CC2520EMK is only usable together with a motherboard/host board, typically the SmartRF05EB and (...)


Can be used with 802.15.4 TIMAC, SimpliciTI, and ZigBee software or for proprietary 802.15.4 applications.

document-generic User guide

The CC Debugger is a small programmer and debugger for the TI Low Power RF System-on-Chips. It can be used together with IAR Embedded Workbench for 8051 (version 7.51A or later) for debugging and SmartRF Flash Programmer for flash programming. The CC Debugger can also be used for controlling (...)


Contents in the box:

  • CC Debugger
  • Mini USB cable
  • 10-pin flat cable with 2x5 2.54mm connector
  • 10-pin flat cable with 2x5 1.27mm connector
  • Converter board 2.54mm-1.27mm connector
  • Documentation

CC-Debugger can be used to program and debug the following 8051-based system-on-chips from Texas Instruments:

  • CC1110 (...)

Software development

SmartRF Studio
SMARTRFTM-STUDIO SmartRF™ Studio is a Windows application that helps designers of RF systems to easily evaluate the radio at an early stage in the design process for all TI CC1xxx and CC2xxx low-power RF devices. It simplifies generation of the configuration register values and commands, as well as practical (...)
  • Link tests. Send and Receive packets between nodes.
  • Antenna and radiation tests. Set the radio in continuous wave TX and RX states.
  • A set of recommended/typical register settings for all devices.
  • Read and write individual RF registers.
  • Execute individual commands to control the radio.
  • Detailed (...)
SWRC063.ZIP (1431 KB)
SWRC082.ZIP (5727 KB)

CAD/CAE symbols

Package Pins Download
VQFN (RTC) 48 View options

Ordering & quality

Information included:
  • RoHS
  • Device marking
  • Lead finish/Ball material
  • MSL rating/Peak reflow
  • MTBF/FIT estimates
  • Material content
  • Qualification summary
  • Ongoing reliability monitoring

Support & training

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