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

8 Applications, Implementation, and Layout

Note:

Information in the following applications sections is not part of the TI component specification, and TI does not warrant its accuracy or completeness. TI’s customers are responsible for determining suitability of components for their purposes, as well as validating and testing their design implementation to confirm system functionality.

Figure 8-1 shows the reference schematic for the CC355xE using an optimized bill of materials.

CC3551E CC355xE Reference Schematic Figure 8-1 CC355xE Reference Schematic

1. The slow clock can be generated internally. An external slow clock oscillator or XTAL can be optionally used to save power.

2. The CC355xE device has three IO rings (VIO1, VIO2, VDD_SF), please see Section 6.3 for IO voltage requirements per device.

3. RF Shield recommended for optimal regulatory compliance.

Table 8-1 Bill of Materials
DESIGNATOR QUANTITY VALUE PART NUMBER MANUFACTURER DESCRIPTION PACKAGE REFERENCE
C1, C2, C3, C8, C9,C10, C17 7 0.1µF GRM033C71A104KE14D MuRata CAP, CERM, 0.1μF, 10V, +/- 10%, X7S, 0201 0201
C4, C7 2 1µF GRM033D70J105ME01D Murata Chip Multilayer Ceramic Capacitors for General Purpose, 0201, 1.0μF, X7T, +22%/-33%, 20%, 6.3V 0201
C5, C6 2 1µF GRM155R70J105MA12D Murata CAP, CERM, 1μF, 6.3V, +/- 20%, X7R, 0402 0402
C11 1 3.9pF GRM0335C1E3R9BA01 Murata Chip Multilayer Ceramic Capacitors for General Purpose, 0201, 3.9pF, C0G 0201
C12 1 1.0pF GRM0335C1E1R0CA01 Murata Chip Multilayer Ceramic Capacitors for General Purpose, 0201, 1.0pF, C0G, 25V 0201
C13, C14 2 6.2pF GRM0335C1E6R2BA01 Murata CAP, CERM, 6.2pF, 25V, +/- 2%, C0G/NP0, 0201 0201
R1 1 150Ω RC0201FR-7D150RL Yageo America RES, 150, 1%, 0.05W, 0201 0201
U1 1 CC3551ENJARSHR Texas Instruments CC355x 2.4GHz SimpleLink™ Wi-Fi 6 and Bluetooth Low Energy Wireless MCU VQFN56

U2

1

DPX167125DT-8197B1

 TDK Multilayer Diplexer For 2.4-2.5GHz W-LAN and Bluetooth / 5-7GHz W-LAN SMD6
U3 1 IS25WJ032F-JNLE ISSI FLASH - NOR Memory IC 32Mbit SPI - Quad I/O, QPI, DTR 133MHz 6ns 8-SOP SOIC8
Y1 1 TZ3716BAAO42 TAI-SAW TECHNOLOGY Crystal Unit SMD 2.0x1.6 52.0MHz SMT_XTAL_ 2MM05_1MM65
FL1 1 DEA162450BT-1295A1 TDK 2.45GHz Center Frequency Band Pass RF Filter (Radio Frequency) 100MHz Bandwidth 1.8dB 0603 (1608 Metric), 3 PC Pad SMT_FILTER_ 1MM60_0MM80
E1 1 M830520 Kyocera AVX WLAN ANTENNA 802.11, SMD A 802.11, SMD 8x3mm
Optional: Y2 1 TZ3359DAAO73 TAI-SAW Technology Crystal Unit 1.6x1.0 Tuning Fork 32.768KHz SMT2_1MM65_ 1MM05
Optional: C15,C16 2 4.7pF GRM0335C1H4R7BA01D Murata CAP, CERM, 4.7pF, 50V,+/- 3%, C0G/NP0, 0201 0201
Optional: Y3 1 LFSPXO073707REEL IQD Frequency Products 32.768kHz XO (Standard) CMOS Oscillator 1.8V Enable/Disable 4- SMD, No Lead SMT4_2MM0_ 1MM6