ZHCSRF8 December   2022 TPS3435

PRODUCTION DATA  

  1. 1 特性
  2. 2 应用
  3. 3 说明
  4. 4 Revision History
  5. 5 器件比较
  6. 6 Pin Configuration and Functions
  7. 7 Specifications
    1. 7.1 Absolute Maximum Ratings
    2. 7.2 ESD Ratings
    3. 7.3 Recommended Operating Conditions
    4. 7.4 Thermal Information
    5. 7.5 Electrical Characteristics
    6. 7.6 Timing Requirements
    7. 7.7 Switching Characteristics
    8. 7.8 Timing Diagrams
    9. 7.9 Typical Characteristics
  8. 8 详细说明
    1. 8.1 Overview
    2. 8.2 Functional Block Diagrams
    3. 8.3 Feature Description
      1. 8.3.1 Timeout Watchdog Timer
        1. 8.3.1.1 tWD Timer
        2. 8.3.1.2 Watchdog Enable Disable Operation
        3. 8.3.1.3 tSD Watchdog Start Up Delay
        4. 8.3.1.4 SET Pin Behavior
      2. 8.3.2 Manual RESET
      3. 8.3.3 WDO Output
    4. 8.4 Device Functional Modes
  9. 9 Application and Implementation
    1. 9.1 Application Information
      1. 9.1.1 Output Assert Delay
        1. 9.1.1.1 Factory-Programmed Output Assert Delay Timing
        2. 9.1.1.2 Adjustable Capacitor Timing
      2. 9.1.2 Watchdog Timer Functionality
        1. 9.1.2.1 Factory-Programmed Timing Options
        2. 9.1.2.2 Adjustable Capacitor Timing
    2. 9.2 Typical Applications
      1. 9.2.1 Design 1: Monitoring a Standard Microcontroller for Timeouts
        1. 9.2.1.1 Design Requirements
        2. 9.2.1.2 Detailed Design Procedure
          1. 9.2.1.2.1 Setting the Watchdog Timeout Period
          2. 9.2.1.2.2 Setting Output Assert Delay
          3. 9.2.1.2.3 Setting the Startup Delay
          4. 9.2.1.2.4 Calculating the WDO Pullup Resistor
        3. 9.2.1.3 Application Curves
  10. 10Power Supply Recommendations
  11. 11Layout
    1. 11.1 Layout Guidelines
    2. 11.2 Layout Example
  12. 12Device and Documentation Support
    1. 12.1 接收文档更新通知
    2. 12.2 支持资源
    3. 12.3 Trademarks
    4. 12.4 Electrostatic Discharge Caution
    5. 12.5 术语表
  13. 13Mechanical, Packaging, and Orderable Information

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7.7 Switching Characteristics

At 1.04 V ≤ VDD ≤ 6 V, MR = Open, WDO pull-up resistor (Rpull-up) = 100 kΩ to VDD, output RESET / WDO load (CLOAD) = 10 pF and over operating free-air temperature range –40℃ to 125℃, unless otherwise noted. VDD ramp rate ≤ 1 V/µs. Typical values are at TA = 25℃
PARAMETER TEST CONDITIONS MIN TYP MAX UNIT
tSTRT Startup delay (1)
 		 500 µs
tSD Watchdog startup delay Orderable part number TPS3435xA, TPS3435xG 0 ms
Orderable part number TPS3435xB, TPS3435xH 180 200 220
Orderable part number TPS3435xC, TPS3435xI 450 500 550
Orderable part number TPS3435xD, TPS3435xJ 0.9 1 1.1 s
Orderable part number TPS3435xE, TPS3435xK 4.5 5 5.5
Orderable part number TPS3435xF, TPS3435xL 9 10 11
tWDO Watchdog assert time delay Orderable part number TPS3435xxxxB 1.6 2 2.4 ms
Orderable part number TPS3435xxxxC 9 10 11 ms
Orderable part number TPS3435xxxxD 22.5 25 27.5 ms
Orderable part number TPS3435xxxxE 45 50 55 ms
Orderable part number TPS3435xxxxF 90 100 110 ms
Orderable part number TPS3435xxxxG 180 200 220 ms
Orderable part number TPS3435xxxxH 0.9 1 1.1 s
Orderable part number TPS3435xxxxI 9 10 11 s
tMR_WDO Propagation delay from MR low to WDO assertion VDD ≥ 1.25 V,
MR = VMR_H to VMR_L		 100 ns
(1) Specified by design parameter.