ZHCSIJ8A July   2018  – October 2021 TPS3431-Q1

PRODUCTION DATA  

  1. 特性
  2. 应用
  3. 说明
  4. Revision History
  5. Pin Configuration and Functions
  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 Timing Requirements
    7. 6.7 Timing Diagrams
    8. 6.8 Typical Characteristics
  7. Detailed Description
    1. 7.1 Overview
    2. 7.2 Functional Block Diagram
    3. 7.3 Feature Description
      1. 7.3.1 Enable Input (EN) and Enable Output (ENOUT)
      2. 7.3.2 Watchdog Mode
        1. 7.3.2.1 CWD
        2. 7.3.2.2 Watchdog Input WDI
        3. 7.3.2.3 Watchdog Output WDO
        4. 7.3.2.4 SET1
    4. 7.4 Device Functional Modes
      1. 7.4.1 VDD is Below VPOR ( VDD < VPOR)
      2. 7.4.2 Above Power-On-Reset, But Less Than VDD(min) (VPOR ≤ VDD < VDD(min))
      3. 7.4.3 Normal Operation (VDD ≥ VDD(min))
  8. Application and Implementation
    1. 8.1 Application Information
      1. 8.1.1 CWD Functionality
        1. 8.1.1.1 Factory-Programmed Timing Options
        2. 8.1.1.2 CWD Adjustable Capacitor Watchdog Timeout
    2. 8.2 Typical Application
      1. 8.2.1 Design 1 Requirements
      2. 8.2.2 Detailed Design 1 Procedure
        1. 8.2.2.1 Calculating WDO Pullup Resistor Design 1
        2. 8.2.2.2 Setting the Watchdog Design 1
      3. 8.2.3 Application Curves Design 1
    3. 8.3 Programmable Application
      1. 8.3.1 Design 2 Requirements
      2. 8.3.2 Detailed Design 2 Procedure
        1. 8.3.2.1 Calculating WDO Pullup Resistor Design 2
        2. 8.3.2.2 Setting the Watchdog Design 2
        3. 8.3.2.3 Watchdog Disabled During Initialization Period Design 2
        4. 8.3.2.4 Programmable Disable Feature Design 2
      3. 8.3.3 Application Curves Design 2
  9. Power Supply Recommendations
  10. 10Layout
    1. 10.1 Layout Guidelines
    2. 10.2 Layout Example
  11. 11Device and Documentation Support
    1. 11.1 Device Support
    2. 11.2 Documentation Support
      1. 11.2.1 Related Documentation
    3. 11.3 接收文档更新通知
    4. 11.4 支持资源
    5. 11.5 Trademarks
    6. 11.6 Electrostatic Discharge Caution
    7. 11.7 术语表
  12. 12Mechanical, Packaging, and Orderable Information

封装选项

机械数据 (封装 | 引脚)
散热焊盘机械数据 (封装 | 引脚)
订购信息

说明

TPS3431-Q1 是一款具有使能功能的标准汽车类可编程看门狗计时器,适用于汽车应用。看门狗超时可在 –40°C 至 +125°C 温度范围内实现 15% 的高计时精度,在 25°C 下实现 2.5% 的典型计时精度,并且可通过外部电容器或工厂编程的默认延迟设置进行编程。在开发过程中,可以通过 Enable 引脚或 SET 逻辑引脚将看门狗禁用,从而避免出现不必要的看门狗超时。

TPS3431-Q1 采用小型 3.00mm ×
3.00mm 8 引脚 VSON 封装。TPS3431-Q1 具有可湿性侧面,可轻松进行光学检查。

器件信息
器件型号 封装 (1) 封装尺寸(标称值)
TPS3431-Q1 VSON (8) 3.00mm × 3.00mm
如需了解所有可用封装,请参阅数据表末尾的可订购产品附录。
GUID-E9AE443C-308B-4440-A867-1FA555A3C907-low.gif
也可以将 EN 保持浮动并将其从内部上拉至 VDD
也可以将 ENOUT 保持浮动或将其连接至 WDO
标准看门狗计时器电路
GUID-F67D9D92-3F0E-4C45-953E-0EB74DF8169D-low.gif标准化看门狗超时 (tWD) 精度(SET1 = 1,CWD = NC)