JAJSPM2E April   2009  – January 2023 TCA6408A

PRODUCTION DATA  

  1. 1 特長
  2. 2 アプリケーション
  3. 3 概要
  4. 4 Revision History
  5. 5 Pin Configuration and Functions
  6. 6 Specifications
    1. 6.1 Absolute Maximum Ratings
    2. 6.2 ESD Ratings
    3. 6.3 Recommended Operating Conditions
    4. 6.4 Thermal Information
    5. 6.5 Electrical Characteristics
    6. 6.6 I2C Interface Timing Requirements
    7. 6.7 Reset Timing Requirements
    8. 6.8 Switching Characteristics
    9. 6.9 Typical Characteristics
  7. 7 Parameter Measurement Information
  8. 8 Detailed Description
    1. 8.1 Overview
    2. 8.2 Functional Block Diagrams
    3. 8.3 Feature Description
      1. 8.3.1 Voltage Translation
      2. 8.3.2 I/O Port
      3. 8.3.3 Interrupt Output ( INT)
      4. 8.3.4 Reset Input ( RESET)
    4. 8.4 Device Functional Modes
      1. 8.4.1 Power-On Reset (POR)
      2. 8.4.2 Powered-Up
    5. 8.5 Programming
      1. 8.5.1 I2C Interface
      2. 8.5.2 Bus Transactions
        1. 8.5.2.1 Writes
        2. 8.5.2.2 Reads
    6. 8.6 Register Map
      1. 8.6.1 Device Address
      2. 8.6.2 Control Register and Command Byte
      3. 8.6.3 Register Descriptions
  9. 9 Application and Implementation
    1. 9.1 Application Information
    2. 9.2 Typical Application
      1. 9.2.1 Design Requirements
      2. 9.2.2 Detailed Design Procedure
        1. 9.2.2.1 Minimizing ICC When I/O is Used to Control LEDs
      3. 9.2.3 Application Curves
  10. 10Power Supply Recommendations
    1. 10.1 Power-On Reset Requirements
  11. 11Layout
    1. 11.1 Layout Guidelines
    2. 11.2 Layout Example
  12. 12Device and Documentation Support
    1. 12.1 ドキュメントの更新通知を受け取る方法
    2. 12.2 サポート・リソース
    3. 12.3 商標
    4. 12.4 静電気放電に関する注意事項
    5. 12.5 用語集
      1.      Mechanical, Packaging, and Orderable Information

パッケージ・オプション

メカニカル・データ（パッケージ｜ピン）
サーマルパッド・メカニカル・データ
発注情報

9.2.2.1 Minimizing ICC When I/O is Used to Control LEDs

When the I/Os are used to control LEDs, normally they are connected to VCC through a resistor as shown in GUID-B0A4BE30-85A6-42AB-BEED-F3CC70F07A03.html#SCPS133IMG1020. The LED acts as a diode, so when the LED is off, the I/O VIN is about 1.2 V less than VCC. The ΔICC parameter in GUID-E4B3558E-EEC3-41D5-96D3-1E720DA96F11.html#GUID-E4B3558E-EEC3-41D5-96D3-1E720DA96F11 shows how ICC increases as VIN becomes lower than VCC. Designs that must minimize current consumption, such as battery power applications, should consider maintaining the I/O pins greater than or equal to VCC when the LED is off.

#SCPS133IMG9954 shows a high-value resistor in parallel with the LED. #SCPS133IMG5549 shows VCC less than the LED supply voltage by at least 1.2 V. Both of these methods maintain the I/O VIN at or above VCC and prevent additional supply current consumption when the LED is off.

GUID-D72972DA-9AD5-4BFA-93DC-7FFDD3A38A0F-low.gifFigure 9-2 High-Value Resistor in Parallel With LED
GUID-46B3CF57-15B0-4234-96B6-934A4CF103BD-low.gifFigure 9-3 Device Supplied by a Low Voltage