JAJSKU3D April   2020  – January 2023 TLV841

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 Device Comparison
  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 Timing Diagrams
    8. 7.8 Typical Characteristics
  8. 8 Detailed Description
    1. 8.1 Overview
    2. 8.2 Functional Block Diagram
    3. 8.3 Feature Description
      1. 8.3.1 Input Voltage (VDD)
        1. 8.3.1.1 VDD Hysteresis
        2. 8.3.1.2 VDD Transient Immunity
      2. 8.3.2 SENSE Input (TLV841S)
        1. 8.3.2.1 SENSE Hysteresis
        2. 8.3.2.2 Immunity to SENSE Pin Voltage Transients
      3. 8.3.3 User-Programmable Reset Time Delay for TLV841C only
      4. 8.3.4 Manual Reset (MR) Input for TLV841M only
      5. 8.3.5 Output Logic
        1. 8.3.5.1 RESET Output, Active-Low
        2. 8.3.5.2 RESET Output, Active-High
    4. 8.4 Device Functional Modes
      1. 8.4.1 Normal Operation (VDD > VPOR)
      2. 8.4.2 Below Power-On-Reset (VDD < VPOR)
  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
      3. 9.2.3 Application Curves: TLV841EVM
  10. 10Power Supply Recommendations
  11. 11Layout
    1. 11.1 Layout Guidelines
    2. 11.2 Layout Example
  12. 12Device and Documentation Support
    1. 12.1 Device Nomenclature
    2. 12.2 Documentation Support
      1. 12.2.1 Related Documentation
    3. 12.3 ドキュメントの更新通知を受け取る方法
    4. 12.4 サポート・リソース
    5. 12.5 Trademarks
    6. 12.6 静電気放電に関する注意事項
    7. 12.7 用語集
  13. 13Mechanical, Packaging, and Orderable Information

8.3.2 SENSE Input (TLV841S)

The SENSE input can vary from 0 V to 5.5 V, regardless of the device supply voltage used. The SENSE pin is used to monitor a critical voltage rail or push-button input. If the voltage on this pin drops below VIT-, then RESET/RESET is asserted. When the voltage on the SENSE pin rises above the positive threshold voltage
VIT- + VHYS, RESET/RESET deasserts after the user-defined RESET/RESET delay time. The internal comparator has built-in hysteresis to ensure well-defined RESET/RESET assertions and deassertions even when there are small changes on the voltage rail being monitored.

The TLV841 device is relatively immune to short transients on the SENSE pin. Glitch immunity (tGI_VIT-), specified in GUID-XXXXXXXX-SF0T-XXXX-XXXX-000000182867.html#GUID-XXXXXXXX-SF0T-XXXX-XXXX-000000182867, is dependent on threshold overdrive, as illustrated in GUID-A47B78D5-587A-4CC4-B13F-A791315C79FD.html#T5037184-51. Although not required in most cases, for noisy applications, good analog design practice is to place a 10 nF to 100 nF bypass capacitor at the SENSE input to reduce sensitivity to transient voltages on the monitored signal.