JAJSJN1A May   2023  – September 2023 TMP4718

PRODUCTION DATA  

  1.   1
  2. 1 特長
  3. 2 アプリケーション
  4. 3 概要
  5. 4 Revision History
  6. 5 Device Comparison
  7. 6 Pin Configuration and Functions
  8. 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 I2C Interface Timing
    7. 7.7 Timing Diagrams
    8. 7.8 Typical Characteristics
  9. 8 Detailed Description
    1. 8.1 Overview
    2. 8.2 Functional Block Diagram
    3. 8.3 Feature Description
      1. 8.3.1 1.2-V Logic Compatible Inputs
      2. 8.3.2 Series Resistance Cancellation
      3. 8.3.3 Device Initialization, Resistor Decoding, and Default Temperature Conversion
      4. 8.3.4 Adjustable Default T_CRIT High-Temperature Limit
      5. 8.3.5 ALERT and T_CRIT Output
      6. 8.3.6 Fault Queue
      7. 8.3.7 Filtering
      8. 8.3.8 One-Shot Conversions
    4. 8.4 Device Functional Modes
      1. 8.4.1 Interrupt and Comparator Mode
        1. 8.4.1.1 Interrupt Mode
        2. 8.4.1.2 Comparator Mode
        3. 8.4.1.3 T_CRIT Output
      2. 8.4.2 Shutdown Mode
      3. 8.4.3 Continuous Conversion Mode
    5. 8.5 Programming
      1. 8.5.1 Temperature Data Format
      2. 8.5.2 I2C and SMBus Interface
      3. 8.5.3 Device Address
      4. 8.5.4 Bus Transactions
        1. 8.5.4.1 Writes
        2. 8.5.4.2 Reads
      5. 8.5.5 SMBus Alert Mode
    6. 8.6 Register Map
  10. 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
      3. 9.2.3 Application Curves
    3. 9.3 Power Supply Recommendations
    4. 9.4 Layout
      1. 9.4.1 Layout Guidelines
      2. 9.4.2 Layout Example
  11. 10Device and Documentation Support
    1. 10.1 Documentation Support
      1. 10.1.1 Related Documentation
    2. 10.2 ドキュメントの更新通知を受け取る方法
    3. 10.3 サポート・リソース
    4. 10.4 Trademarks
    5. 10.5 静電気放電に関する注意事項
    6. 10.6 用語集
  12. 11Mechanical, 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

8.3.4 Adjustable Default T_CRIT High-Temperature Limit

The default Remote and Local T_CRIT high-temperature limits are adjustable with the use of pullup resistors on the ALERT and T_CRIT pins. The values of the resistors are decoded within the first 50 ms after device power-up, after which the device sets the Remote and Local T_CRIT high-temperature limits. Table 8-1 shows the values of each limit. Note the following rules when choosing the resistors:

  1. The value of the pullup resistors must be within 1% of the nominal value specified in the table below for proper decoding.
  2. If no pullup resistor is connected, the decoded resistance value is the highest resistance value from the table (that is, 18.7 kΩ).
  3. If the pin is grounded, the decoded resistance value is the lowest resistance value from the table (that is, 2 kΩ).
  4. The ALERT and T_CRIT pins can share the same pullup resistor, resulting one of the five T_CRIT limits (77°C, 89°C, 101°C, 113°C or 125°C) to be stored in the device.
  5. The resistor decoding scheme functions regardless of the pullup voltage on the pins.
  6. The decoded threshold value can be overwritten by writing desired values into the THigh_Crit_Remote and THigh_Crit_Local registers.
Table 8-1 T_CRIT High-Temperature Limits
T_CRIT LIMIT (°C)T_CRIT PIN PULLUP RESISTOR VALUE
<2 kΩ7.5 kΩ10.5 kΩ14 kΩ>18.7 kΩ
ALERT pin pullup resistor value<2 kΩ77°C87°C97°C107°C117°C
7.5 kΩ79°C89°C99°C109°C119°C
10.5 kΩ81°C91°C101°C111°C121°C
14 kΩ83°C93°C103°C113°C123°C
>18.7 kΩ85°C95°C105°C115°C125°C