SWRS337B December   2025  – June 2026 CC3551E

PRODUCTION DATA  

  1.   1
  2. 1 Features
  3. 2 Applications
  4. 3 Description
  5. 4 Functional Block Diagram
  6. 5 Pin Configuration and Functions
    1. 5.1 Pin Diagram
    2. 5.2 Pin Attributes
    3. 5.3 Signal Descriptions
  7. 6 Specifications
    1. 6.1  Absolute Maximum Ratings
    2. 6.2  ESD Ratings
    3. 6.3  Recommended Operating Conditions
    4. 6.4  Electrical Characteristics
    5. 6.5  Thermal Resistance Characteristics
    6. 6.6  WLAN Performance: 2.4-GHz Receiver Characteristics
    7. 6.7  WLAN Performance: 2.4-GHz Transmitter Power
    8. 6.8  WLAN Performance: 5-GHz Receiver Characteristics
    9. 6.9  WLAN Performance: 5-GHz Transmitter Power
    10. 6.10 Bluetooth LE Performance: Receiver Characteristics
    11. 6.11 Bluetooth LE Performance - Transmitter Characteristics
    12. 6.12 Current Consumption - 2.4GHz WLAN Static Modes 
    13. 6.13 Current Consumption - 5GHz WLAN Static Modes
    14. 6.14 Current Consumption - 2.4GHz WLAN Use Cases
    15. 6.15 Current Consumption - Bluetooth LE Static Modes 
    16. 6.16 Current Consumption - MCU Modes
    17. 6.17 Timing and Switching Characteristics
      1. 6.17.1 Clock Specifications
        1. 6.17.1.1 Fast Clock Using an External Crystal (XTAL)
          1. 6.17.1.1.1 External Fast Clock XTAL Specifications
        2. 6.17.1.2 Slow Clock Using Internal Oscillator
        3. 6.17.1.3 Slow Clock Using an External Oscialltor
          1. 6.17.1.3.1 External Slow Clock Oscillator Specifications
        4. 6.17.1.4 Slow Clock Using an External Crystal (XTAL)
          1. 6.17.1.4.1 External Slow Clock XTAL Specifications
      2. 6.17.2 Peripheral Characteristics
        1. 6.17.2.1  ADC
          1. 6.17.2.1.1 ADC Electrical Specifications
        2. 6.17.2.2  I2C
          1. 6.17.2.2.1 I2C Timing Parameters
          2. 6.17.2.2.2 I2C Timing Diagram
        3. 6.17.2.3  SPI
          1. 6.17.2.3.1 SPI Timing Parameters - Controller Mode
          2. 6.17.2.3.2 SPI Timing Diagrams - Controller Mode
          3. 6.17.2.3.3 SPI Timing Parameters - Peripheral Mode
          4. 6.17.2.3.4 SPI Timing Diagrams - Peripheral Mode
        4. 6.17.2.4  xSPI
          1. 6.17.2.4.1 QSPI Timing Parameters
        5. 6.17.2.5  UART
          1. 6.17.2.5.1 UART Timing Parameters
        6. 6.17.2.6  I2S
          1. 6.17.2.6.1 I2S Timing Parameters - Controller Mode
          2. 6.17.2.6.2 I2S Timing Parameters - Peripheral Mode
        7. 6.17.2.7  PDM
          1. 6.17.2.7.1 PDM Timing Parameters
        8. 6.17.2.8  CAN
          1. 6.17.2.8.1 CAN Characteristics
        9. 6.17.2.9  SDMMC
          1. 6.17.2.9.1 SDMMC Timing Parameters - Default Speed 
          2. 6.17.2.9.2 SDMMC Timing Parameters - High Speed 
        10. 6.17.2.10 SDIO
          1. 6.17.2.10.1 SDIO Timing Parameters - Default Speed 
          2. 6.17.2.10.2 SDIO Default Timing
          3. 6.17.2.10.3 SDIO Timing Parameters - High Speed 
          4. 6.17.2.10.4 SDIO High Speed Timing
  8. 7 Detailed Description
    1. 7.1  Overview
    2. 7.2  Arm Cortex-M33 Processor
    3. 7.3  Wireless Subsystem
      1. 7.3.1 WLAN
      2. 7.3.2 Bluetooth Low Energy
    4. 7.4  Memory Subsystem (MEMSS)
      1. 7.4.1 External Memory Interface
    5. 7.5  Hardware Security Module
    6. 7.6  Debug Subsystem (DEBUGSS)
    7. 7.7  General Purpose Timers
    8. 7.8  Real Time Clock (RTC)
    9. 7.9  Direct Memory Access (DMA)
    10. 7.10 Serial Peripherals and I/Os
  9. 8 Applications, Implementation, and Layout
  10. 9 Device and Documentation Support
    1. 9.1 Third-Party Products Disclaimer
    2. 9.2 Device Nomenclature
    3. 9.3 Tools and Software
    4. 9.4 Documentation Support
    5. 9.5 Support Resources
    6. 9.6 Trademarks
    7. 9.7 Electrostatic Discharge Caution
    8. 9.8 Glossary
  11. 10Revision History
  12. 11Mechanical, Packaging, and Orderable Information

3 Description

The SimpleLink™ Wi-Fi system-on-chip CC35xx family is where affordability meets reliability, enabling engineers to connect more applications with confidence. CC35xx are single-chip Wi-Fi 6 and Bluetooth Low Energy 5.4 wireless microcontrollers (MCUs). The CC3550E and CC3551E are the first dual-band devices in this pin-to-pin compatible family.

  • CC3550E: 2.4GHz and 5GHz Wi-Fi 6 wireless MCU
  • CC3551E: 2.4GHz and 5GHz Wi-Fi 6 and Bluetooth low energy 5.4 wireless MCU

The CC355xE offers the latest standards from Wi-Fi and Bluetooth Low Energy while maintaining compatibility with Wi-Fi 4 (802.11 a/b/g/n) and Wi-Fi 5 (802.11 ac). These CC355xE are the 10th-generation connectivity combo chip from Texas Instruments. As such, the CC355xE is based on proven technology. These devices are an excellent choice to use in cost-sensitive embedded applications with RTOS software. CC355xE brings the efficiency of Wi-Fi 6 to embedded device applications for the Internet of Things (IoT), with a small PCB footprint and highly optimized bill of materials. Device flavors with in-package PSRAM for additional runtime memory are also available, see the table below.

Table 3-1 Device Information
PART NUMBER FLASH EXPANSION PSRAM

WI-FI 6 2.4GHz AND 5GHz SISO

 BLUETOOTH LOW ENERGY STATUS
CC3550ENJARSHR ✔ Production
CC3551ENJARSHR ✔ ✔ Production
CC3551ESIARSHR 2MB ✔ ✔ Preview
CC3551ETIARSHR 8MB ✔ ✔ Production
CC3551EFIARSHR 4MB ✔ ✔ Preview
CC3551EGIARSHR 8MB ✔ ✔ Preview