JAJSHZ0A April   2013  – September 2019 TMP108

PRODUCTION DATA.  

  1. 1 特長
  2. 2 アプリケーション
  3. 3 概要
    1.     Device Images
      1.      ブロック図
  4. 4 改訂履歴
  5. 5 Pin Configuration and Functions
    1.     Pin 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 Timing Diagrams
      1. 6.6.1 Two-Wire Timing Diagrams
    7. 6.7 Typical Characteristics
  7. 7 Detailed Description
    1. 7.1 Overview
    2. 7.2 Functional Block Diagram
    3. 7.3 Feature Description
      1. 7.3.1 Serial Interface
      2. 7.3.2 Serial Bus Address
      3. 7.3.3 Bus Overview
      4. 7.3.4 Writing and Reading Operation
      5. 7.3.5 Slave Mode Operations
        1. 7.3.5.1 Slave Receiver Mode:
        2. 7.3.5.2 Slave Transmitter Mode:
      6. 7.3.6 SMBus Alert Function
      7. 7.3.7 General Call
      8. 7.3.8 High-Speed (Hs) Mode
      9. 7.3.9 Timeout Function
    4. 7.4 Device Functional Modes
      1. 7.4.1 Shutdown Mode (M1 = 0, M0 = 0)
      2. 7.4.2 One-Shot Mode (M1 = 0, M0 = 1)
      3. 7.4.3 Continuous Conversion Mode (M1 = 1)
    5. 7.5 Programming
      1. 7.5.1 Pointer Register
      2. 7.5.2 Temperature Register
      3. 7.5.3 Configuration Register
        1. 7.5.3.1 Hysteresis Control (HYS1 and HYS0)
        2. 7.5.3.2 Polarity (POL)
        3. 7.5.3.3 Thermostat Mode (TM)
        4. 7.5.3.4 Temperature Watchdog Flags (FL and FH)
        5. 7.5.3.5 Conversion Rate
      4. 7.5.4 High- and Low-Limit Registers
  8. 8 Application and Implementation
    1. 8.1 Application Information
    2. 8.2 Typical Application
      1. 8.2.1 Design Requirements
      2. 8.2.2 Detailed Design Procedure
      3. 8.2.3 Application Curves
  9. 9 Power Supply Recommendations
  10. 10Layout
    1. 10.1 Layout Guidelines
    2. 10.2 Layout Example
  11. 11デバイスおよびドキュメントのサポート
    1. 11.1 ドキュメントの更新通知を受け取る方法
    2. 11.2 サポート・リソース
    3. 11.3 商標
    4. 11.4 静電気放電に関する注意事項
    5. 11.5 Glossary
  12. 12メカニカル、パッケージ、および注文情報

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

7.5.4 High- and Low-Limit Registers

In comparator mode (TM = 0), the ALERT pin becomes active when the temperature exceeds the value in the THIGH register or drops below the value in the TLOW register. The ALERT pin remains active until the temperature returns to a value that is within the range set by:

Equation 1. (TLOW + HYS) and (THIGH – HYS)

where

  • HYS is the hysteresis set by the hysteresis control bits (HYS1 and HYS0).

In interrupt mode (TM = 1), the ALERT pin becomes active when the temperature exceeds the value in the THIGH register or drops below the value in the TLOW register, and remains active until a read operation of the configuration register occurs (also clears the values latched in the watchdog flags, FL and FH), or the device successfully responds to the SMBus alert response address. The ALERT pin is also cleared by resetting the device with the general call reset command.

Both operational modes are represented in Figure 13 and Figure 14.

Table 11 and Table 12 describe the format for the THIGH and TLOW registers. Note that the most significant byte is sent first, followed by the least significant byte. Power-up (reset) default values are THIGH = +127.9375°C (0x7FF8) and TLOW = –128°C (0x8000). These values ensure that upon power-up, the limit window is set to maximum, and the ALERT pin does not become active until the desired limit values are programmed in the registers. Other default values for the temperature limits are available by request. The format of the data for THIGH and TLOW is the same as for the temperature register.

Table 11. Bytes 1 and 2 of THIGH Register

BYTE D7 D6 D5 D4 D3 D2 D1 D0
1 H11 H10 H9 H8 H7 H6 H5 H4
BYTE D7 D6 D5 D4 D3 D2 D1 D0
2 H3 H2 H1 H0 0 0 0 0

Table 12. Bytes 1 and 2 of TLOW Register

BYTE D7 D6 D5 D4 D3 D2 D1 D0
1 L11 L10 L9 L8 L7 L6 L5 L4
BYTE D7 D6 D5 D4 D3 D2 D1 D0
2 L3 L2 L1 L0 0 0 0 0
TMP108 ai_inrerrupt_mode_bos663.gif
1. Update THIGH and TLOW limit. Read the configuration register to clear the flags and the ALERT pin.
Figure 13. Interrupt Mode
TMP108 ai_comparator_mode_bos663.gifFigure 14. Comparator Mode