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CC2541

ACTIVE

Bluetooth® Low Energy and proprietary wireless MCU

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CC2640 ACTIVE SimpleLink™ 32-bit Arm Cortex-M3 Bluetooth® Low Energy wireless MCU with 128kB Flash Higher performance option
CC2642R ACTIVE SimpleLink™ 32-bit Arm Cortex-M4F Bluetooth® Low Energy wireless MCU with 352kB Flash This product offers an Arm Cortex-M4F, higher flash (352 KB), higher RAM (80 KB).

CC2541

ACTIVE
Data sheet Order now

Product details

CPU core 8051 Technology 2.4 GHz, Bluetooth® LE Protocols Bluetooth® Low Energy Flash memory (kByte) 256 RAM (kByte) 8 Peripherals 12-bit ADC 8-channel, 2 SPI, 2 UART, 4 timers, I2C Number of GPIOs 23 Security Cryptographic acceleration, Device attestation & anti-counterfeit, Secure debug, Software IP protection Operating system TI RTOS Type Wireless MCU Sensitivity (best) (dBm) -94 Operating temperature range (°C) -40 to 85 Edge AI enabled No
CPU core 8051 Technology 2.4 GHz, Bluetooth® LE Protocols Bluetooth® Low Energy Flash memory (kByte) 256 RAM (kByte) 8 Peripherals 12-bit ADC 8-channel, 2 SPI, 2 UART, 4 timers, I2C Number of GPIOs 23 Security Cryptographic acceleration, Device attestation & anti-counterfeit, Secure debug, Software IP protection Operating system TI RTOS Type Wireless MCU Sensitivity (best) (dBm) -94 Operating temperature range (°C) -40 to 85 Edge AI enabled No
VQFN (RHA) 40 36 mm² 6 x 6
  • RF
    • 2.4-GHz Bluetooth low energy Compliant and Proprietary RF System-on-Chip
    • Supports 250-kbps, 500-kbps, 1-Mbps, 2-Mbps Data Rates
    • Excellent Link Budget, Enabling Long-Range Applications Without External Front End
    • Programmable Output Power up to 0 dBm
    • Excellent Receiver Sensitivity (–94 dBm at 1 Mbps), Selectivity,
      and Blocking Performance
    • Suitable for Systems Targeting Compliance With Worldwide Radio
      Frequency Regulations: ETSI EN 300 328 and EN 300 440 Class 2 (Europe),
      FCC CFR47 Part 15 (US), and ARIB STD-T66 (Japan)
  • Layout
    • Few External Components
    • Reference Design Provided
    • 6-mm × 6-mm QFN-40 Package
    • Pin-Compatible With CC2540 (When Not Using USB or I2C)
  • Low Power
    • Active-Mode RX Down to: 17.9 mA
    • Active-Mode TX (0 dBm): 18.2 mA
    • Power Mode 1 (4-µs Wake-Up): 270 µA
    • Power Mode 2 (Sleep Timer On): 1 µA
    • Power Mode 3 (External Interrupts): 0.5 µA
    • Wide Supply-Voltage Range (2 V–3.6 V)
  • TPS62730 Compatible Low Power in Active Mode
    • RX Down to: 14.7 mA (3-V supply)
    • TX (0 dBm): 14.3 mA (3-V supply)
  • Microcontroller
    • High-Performance and Low-Power 8051 Microcontroller Core
      With Code Prefetch
    • In-System-Programmable Flash, 128- or 256-KB
    • 8-KB RAM With Retention in All Power Modes
    • Hardware Debug Support
    • Extensive Baseband Automation, Including Auto-Acknowledgment
      and Address Decoding
    • Retention of All Relevant Registers in All Power Modes
  • Peripherals
    • Powerful Five-Channel DMA
    • General-Purpose Timers (One 16-Bit, Two 8-Bit)
    • IR Generation Circuitry
    • 32-kHz Sleep Timer With Capture
    • Accurate Digital RSSI Support
    • Battery Monitor and Temperature Sensor
    • 12-Bit ADC With Eight Channels and Configurable Resolution
    • AES Security Coprocessor
    • Two Powerful USARTs With Support for Several Serial Protocols
    • 23 General-Purpose I/O Pins
      (21 × 4 mA, 2 × 20 mA)
    • I2C interface
    • 2 I/O Pins Have LED Driving Capabilities
    • Watchdog Timer
    • Integrated High-PerformanceComparator
  • Development Tools
    • CC2541 Evaluation Module Kit (CC2541EMK)
    • CC2541 Mini Development Kit (CC2541DK-MINI)
    • SmartRF™ Software
    • IAR Embedded Workbench™ Available

Software Features

  • Bluetooth v4.0 Compliant Protocol Stack for Single-Mode BLE
    Solution
    • Complete Power-Optimized Stack, Including Controller and
      HostGAP – Central, Peripheral, Observer, or Broadcaster
      (Including Combination Roles)ATT / GATT – Client and ServerSMP –
      AES-128 Encryption and DecryptionL2CAP
    • Sample Applications and Profiles
      • Generic Applications for GAP Central and Peripheral Roles
      • Proximity, Accelerometer, Simple Keys, and Battery GATT Services
      • More Applications Supported in BLE Software Stack
    • Multiple Configuration Options
      • Single-Chip Configuration, Allowing Applications to Run on CC2541
      • Network Processor Interface for Applications Running on an External
        Microcontroller
    • BTool – Windows PC Application for Evaluation, Development, and Test
  • RF
    • 2.4-GHz Bluetooth low energy Compliant and Proprietary RF System-on-Chip
    • Supports 250-kbps, 500-kbps, 1-Mbps, 2-Mbps Data Rates
    • Excellent Link Budget, Enabling Long-Range Applications Without External Front End
    • Programmable Output Power up to 0 dBm
    • Excellent Receiver Sensitivity (–94 dBm at 1 Mbps), Selectivity,
      and Blocking Performance
    • Suitable for Systems Targeting Compliance With Worldwide Radio
      Frequency Regulations: ETSI EN 300 328 and EN 300 440 Class 2 (Europe),
      FCC CFR47 Part 15 (US), and ARIB STD-T66 (Japan)
  • Layout
    • Few External Components
    • Reference Design Provided
    • 6-mm × 6-mm QFN-40 Package
    • Pin-Compatible With CC2540 (When Not Using USB or I2C)
  • Low Power
    • Active-Mode RX Down to: 17.9 mA
    • Active-Mode TX (0 dBm): 18.2 mA
    • Power Mode 1 (4-µs Wake-Up): 270 µA
    • Power Mode 2 (Sleep Timer On): 1 µA
    • Power Mode 3 (External Interrupts): 0.5 µA
    • Wide Supply-Voltage Range (2 V–3.6 V)
  • TPS62730 Compatible Low Power in Active Mode
    • RX Down to: 14.7 mA (3-V supply)
    • TX (0 dBm): 14.3 mA (3-V supply)
  • Microcontroller
    • High-Performance and Low-Power 8051 Microcontroller Core
      With Code Prefetch
    • In-System-Programmable Flash, 128- or 256-KB
    • 8-KB RAM With Retention in All Power Modes
    • Hardware Debug Support
    • Extensive Baseband Automation, Including Auto-Acknowledgment
      and Address Decoding
    • Retention of All Relevant Registers in All Power Modes
  • Peripherals
    • Powerful Five-Channel DMA
    • General-Purpose Timers (One 16-Bit, Two 8-Bit)
    • IR Generation Circuitry
    • 32-kHz Sleep Timer With Capture
    • Accurate Digital RSSI Support
    • Battery Monitor and Temperature Sensor
    • 12-Bit ADC With Eight Channels and Configurable Resolution
    • AES Security Coprocessor
    • Two Powerful USARTs With Support for Several Serial Protocols
    • 23 General-Purpose I/O Pins
      (21 × 4 mA, 2 × 20 mA)
    • I2C interface
    • 2 I/O Pins Have LED Driving Capabilities
    • Watchdog Timer
    • Integrated High-PerformanceComparator
  • Development Tools
    • CC2541 Evaluation Module Kit (CC2541EMK)
    • CC2541 Mini Development Kit (CC2541DK-MINI)
    • SmartRF™ Software
    • IAR Embedded Workbench™ Available

Software Features

  • Bluetooth v4.0 Compliant Protocol Stack for Single-Mode BLE
    Solution
    • Complete Power-Optimized Stack, Including Controller and
      HostGAP – Central, Peripheral, Observer, or Broadcaster
      (Including Combination Roles)ATT / GATT – Client and ServerSMP –
      AES-128 Encryption and DecryptionL2CAP
    • Sample Applications and Profiles
      • Generic Applications for GAP Central and Peripheral Roles
      • Proximity, Accelerometer, Simple Keys, and Battery GATT Services
      • More Applications Supported in BLE Software Stack
    • Multiple Configuration Options
      • Single-Chip Configuration, Allowing Applications to Run on CC2541
      • Network Processor Interface for Applications Running on an External
        Microcontroller
    • BTool – Windows PC Application for Evaluation, Development, and Test

The CC2541 is a power-optimized true system-on-chip (SoC) solution for both Bluetooth low energy and proprietary 2.4-GHz applications. It enables robust network nodes to be built with low total bill-of-material costs. The CC2541 combines the excellent performance of a leading RF transceiver with an industry-standard enhanced 8051 MCU, in-system programmable flash memory, 8-KB RAM, and many other powerful supporting features and peripherals. The CC2541 is highly suited for systems where ultralow power consumption is required. This is specified by various operating modes. Short transition times between operating modes further enable low power consumption.

The CC2541 is pin-compatible with the CC2540 in the 6-mm × 6-mm QFN40 package, if the USB is not used on the CC2540 and the I2C/extra I/O is not used on the CC2541. Compared to the CC2540, the CC2541 provides lower RF current consumption. The CC2541 does not have the USB interface of the CC2540, and provides lower maximum output power in TX mode. The CC2541 also adds a HW I2C interface.

The CC2541 is pin-compatible with the CC2533 RF4CE-optimized IEEE 802.15.4 SoC.

The CC2541 comes in two different versions: CC2541F128/F256, with 128 KB and 256 KB of flash memory, respectively.

The CC2541 is a power-optimized true system-on-chip (SoC) solution for both Bluetooth low energy and proprietary 2.4-GHz applications. It enables robust network nodes to be built with low total bill-of-material costs. The CC2541 combines the excellent performance of a leading RF transceiver with an industry-standard enhanced 8051 MCU, in-system programmable flash memory, 8-KB RAM, and many other powerful supporting features and peripherals. The CC2541 is highly suited for systems where ultralow power consumption is required. This is specified by various operating modes. Short transition times between operating modes further enable low power consumption.

The CC2541 is pin-compatible with the CC2540 in the 6-mm × 6-mm QFN40 package, if the USB is not used on the CC2540 and the I2C/extra I/O is not used on the CC2541. Compared to the CC2540, the CC2541 provides lower RF current consumption. The CC2541 does not have the USB interface of the CC2540, and provides lower maximum output power in TX mode. The CC2541 also adds a HW I2C interface.

The CC2541 is pin-compatible with the CC2533 RF4CE-optimized IEEE 802.15.4 SoC.

The CC2541 comes in two different versions: CC2541F128/F256, with 128 KB and 256 KB of flash memory, respectively.
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Technical documentation

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Top documentation Type Title Format options Date
* Data sheet CC2541 SimpleLink™ Bluetooth® low energy and proprietary wireless MCU datasheet (Rev. D) 24 Jun 2013
* Errata CC2541 Errata Note 26 Mar 2014
Application note AN103 -- Basic RF Testing of CCxxxx Devices (Rev. A) PDF | HTML 11 Dec 2025
Application note How to Certify Your Bluetooth Product (Rev. N) PDF | HTML 18 Nov 2025
Application note CE Regulations for SRDs Operating in License-Free 2.4GHz/5GHz Bands-WiFi Devices (Rev. A) PDF | HTML 20 Oct 2022
Selection guide Leitfaden zur Auswahl drahtloser Kommunikationstechnologie (Rev. B) 07 Mar 2022
Selection guide 無線連線技術選擇指南 (Rev. B) 07 Mar 2022
Selection guide 무선 연결 기술 선택 가이드 (Rev. B) 07 Mar 2022
Selection guide Wireless Connectivity Technology Selection Guide (Rev. B) 14 Feb 2022
Application note DN035 -- Antenna Quick Guide (Rev. B) 09 Feb 2022
Cybersecurity advisory CC254x OAD: AES CTR Crypto Implementation Vulnerability PDF | HTML 28 Feb 2020
Cybersecurity advisory CC254x OAD: AES-CBC MAC Verification Vulnerability PDF | HTML 28 Feb 2020
User guide CC2540/41 Bluetooth Low Energy Software Developer’s Guide (Rev. I) PDF | HTML 27 Jan 2020
Application note Debugging Communication Range (Rev. A) PDF | HTML 23 May 2019
White paper Wireless Connectivity For The Internet of Things, One Size Does Not Fit All (Rev. A) 16 Oct 2017
Application note CC-Antenna-DK2 and Antenna Measurements Summary (Rev. A) 02 Oct 2017
User guide Getting started with Bluetooth low energy CC2541, CC2541-Q1, CC2540, & CC2540T f 11 Jul 2017
Application note ETSI EN 300 328 Blocking Test for Bluetooth Low Energy PDF | HTML 08 Feb 2017
Application note AN119 - Using an External 32kHz Clock to Drive a CC254x Chip (Rev. A) 12 Dec 2016
Application note Bluetooth Low Energy Beacons (Rev. A) PDF | HTML 19 Oct 2016
Technical article Trends in building automation: connected sensors in safety and security PDF | HTML 20 Jul 2016
Application note Voice Over Remote Control 19 May 2016
More literature Dual-mode Bluetooth CC256x solutions (Rev. C) 03 Feb 2016
User guide CC253x/4x User's Guide (Rev. F) 09 Apr 2014
White paper Three Flavors of Bluetooth: Which One to Choose? 25 Mar 2014
White paper Wireless connectivity for the Internet of Things (IoT) with MSP430 MCUs 13 Mar 2014
Application note AN100 - Crystal Selection Guide (Rev. C) 26 Nov 2013
More literature TI: The IoT technology leader 01 Nov 2013
More literature The Evolution of the Internet of Things 09 Sep 2013
White paper Enabling secure portable medical devices with TI’s MSP430™ MCU 04 Jun 2013
Application note AN120 -- Using CC2590 Front End with CC2541 13 Mar 2013
Application note DN041 -- Using CC253X or CC254X with Dipole PCB Antenna 24 Jan 2013
Application note AN081 -- Johanson Technology Balun Optimized for CC253X, CC254X, CC257X, CC853X (Rev. B) 06 Nov 2012
Application note AN118 -- Flash programming of CC253x/4x devices 05 Sep 2012
Application note AN098 - Layout Review Techniques for Low Power RF Designs (Rev. A) 02 Aug 2012
Application note AN092 -- Measuring Bluetooth Low Energy Power Consumption (Rev. A) 19 Apr 2012
Application note AN097 - Current Savings in CC254x Using the TPS62730 (Rev. B) 08 Feb 2012
More literature Bluetooth Low Energy 4-page brochure (Rev. A) 09 Jan 2012
Application note AN107 - Murata Balun for CC253x and CC254x, LFB182G45BG2D280 (Rev. A) 26 Oct 2011
Application note DN034 -- YAGI 2.4 GHz PCB Antenna 14 Oct 2010
Application note AN058 -- Antenna Selection Guide (Rev. B) 06 Oct 2010
Application note DN031 -- CC-Antenna-DK Documentation and Antenna Measurements Summary 26 Aug 2010

Design & development

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

Evaluation board

ALGO-3P-UISP1-TI — Algocraft μISP1 Programmer for Texas Instruments devices

μISP can either work connected to a host PC (RS-232, USB, LAN connections are built-in) or in standalone mode.

The programming cycle execution in standalone mode may occur by simply pressing the START button or through some TTL control lines.

Its compact size and versatility allows a simple (...)

From: Algocraft
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Debug probe

CC-DEBUGGER — Debugger and Programmer for RF System-on-Chips

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 (...)

User guide: PDF
Not available on TI.com
Development kit

CC2541DK-MINI — CC2541 Mini Development Kit

The CC2541DK-MINI development kit provides a working reference design for software development of single-mode Bluetooth low energy (BLE) applications based on the Texas Instruments CC2541. The included "keyfob" board operates as a BLE peripheral device, and contains modifiable software that can be (...)
User guide: PDF | HTML
Not available on TI.com
Hardware programming tool

ALGO-3P-WRITENOW — Algocraft WriteNow! Programmer

WriteNow! Series of In-System Programmers is a breakthrough in the programming industry. The programmers support a large number of devices (microcontrollers, memories, CPLDs and other programmable devices) from various manufacturers and have a compact size for easy ATE/fixture integration. They (...)

From: Algocraft
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Code example or demo

SWRC257 — CC2541/43/44/45 Peripherals Software Examples

Supported products & hardware

Supported products & hardware
Download
Driver or library

BLE-STACK-1-X — II. BLE-STACK (Support for CC2540/CC2541)

This royalty-free BLE-Stack for TI’s SimpleLink™ Bluetooth® Low Energy family of ARM® Cortex®-M3 based wireless microcontrollers (MCUs) includes full-featured Bluetooth 4.2 and Bluetooth 5 certified stacks with all necessary software, sample applications and documentation to (...)

Supported products & hardware

Supported products & hardware
Download options
IDE, configuration, compiler or debugger

CCSTUDIO — Code Composer Studio™ integrated development environment (IDE)

Code Composer Studio is an integrated development environment (IDE) for TI's microcontrollers and processors. It is comprised of a rich suite of tools used to build, debug, analyze and optimize embedded applications. Code Composer Studio is available across Windows®, Linux® and macOS® platforms.

(...)

Supported products & hardware

Supported products & hardware
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Support software

PACKET-SNIFFER — SmartRF™ Packet Sniffer 2.18.1

The SmartRF Packet Sniffer is a PC software application that can display and store radio packets captured by a listening RF device. The capture device is connected to the PC via USB. Various RF protocols are supported. The Packet Sniffer filters and decodes packets and displays them in a convenient (...)

Supported products & hardware

Supported products & hardware
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Support software

SENSORTAG-SW — SimpleLink™ SensorTag Software

The SensorTag includes an open hardware and software reference design for low cost and low power wireless IoT applications. The SensorTag is supplied with complete source code with everything you need to customize it for your application as well as source code examples for mobile apps.
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Support software

SWRC251 — CC254x Proprietary Mode Packet Error Rate Test

Supported products & hardware

Supported products & hardware
Download
Support software

SWRC258 — BLE Device Monitor (v2.9.0)

Supported products & hardware

Supported products & hardware
Download
Assembly drawing

Bluetooth LE Reference Design Layout

SWRR125.PDF (496 KB)
Download
Assembly drawing

CC2541 Postage Stamp Reference Design Assembly Drawing (Rev. A)

TIDC154A.PDF (27 KB)
Download
Bill of materials (BOM)

Bill of Materials for the ECG With Bluetooth Low-Energy

SNVC113.PDF (102 KB)
Download
Bill of materials (BOM)

CC2541-CC2590EM Reference Design

SWRR116.ZIP (865 KB)
Download
Bill of materials (BOM)

Bluetooth LE Reference Design Bill of Materials (BOM)

SWRR127.ZIP (89 KB)
Download
Bill of materials (BOM)

Bluetooth Smart Keyfob Reference Design Bill of Materials (BOM)

TIDR192.PDF (54 KB)
Download
Bill of materials (BOM)

Bluetooth Smart Remote Control Reference Design Bill of Materials

TIDR194.PDF (98 KB)
Download
Bill of materials (BOM)

CC2541 Postage Stamp Reference Design Bill of Materials (BOM) (Rev. A)

TIDR204A.PDF (97 KB)
Download
Calculation tool

BT-POWER-CALC — Bluetooth Power Calculator for CC13xx, CC26xx and CC23xx devices

This tool is used to calculate Bluetooth Low Energy power consumption estimates for various use cases on TI Bluetooth devices. The calculator includes both advertising and peripheral use cases with the ability to configure different use case profile parameters. The calculator outputs an estimate (...)
Supported products & hardware

Supported products & hardware
Download options
Calculation tool

SMARTRF-STUDIO-7 — SmartRF Studio 7 application software

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 (...)

Supported products & hardware

Supported products & hardware
Download options
Design tool

3P-WIRELESS-MODULES — Third party wireless module search tool

The third party wireless module search tool helps developers to identify products that meet their end equipment specifications and procure production ready wireless modules. The third party module vendors included in the search tool are independent third party companies with expertise in designing (...)
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Design tool

SIMPLELINK-2-4GHZ-DESIGN-REVIEWS — Hardware design reviews for SimpleLink™ CC2xxx devices

The SimpleLink hardware design review process provides a way to get in touch, one-on-one, with a subject matter expert that can help review your design and provide valuable feedback. A simple three-step process for requesting a review as well as links to relevant technical documentation and (...)
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Gerber file

ECG With Bluetooth Low-Energy Gerber

SNVC114.ZIP (901 KB)
Download
Gerber file

CC2541EM Reference Design Files

SWRR096.ZIP (820 KB)
Download
PCB layout

CC2541EM Reference Design 2-Layer

SWRR133.ZIP (661 KB)
Download
Schematic

Schematic for the ECG With Bluetooth Low-Energy

SNVC112.PDF (214 KB)
Download
Schematic

Bluetooth LE Reference Design Schematic

SWRR126.PDF (697 KB)
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Schematic

CC2541 PS Reference Design (Rev. A)

SWRR131A.ZIP (411 KB)
Download
Schematic

Bluetooth Smart Keyfob Reference Design Schematic

TIDR191.PDF (186 KB)
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Schematic

Bluetooth Smart Remote Control Reference Design Schematic

TIDR193.PDF (62 KB)
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Schematic

CC2541 Postage Stamp Reference Design Schematic (Rev. A)

TIDR203A.PDF (25 KB)
Download

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