參數(shù)資料
      型號(hào): TC1270ARVRCTR
      廠商: Microchip Technology Inc.
      英文描述: Voltage Supervisor with Manual Reset Input
      中文描述: 電壓監(jiān)控器,帶有手動(dòng)復(fù)位輸入
      文件頁(yè)數(shù): 23/40頁(yè)
      文件大?。?/td> 384K
      代理商: TC1270ARVRCTR
      2007 Microchip Technology Inc.
      DS22035B-page 23
      TC1270A/70AN/71A
      5.0
      APPLICATION INFORMATION
      This section shows application related information that
      may be useful for your particular design requirements.
      5.1
      Supply Monitor Noise Sensitivity
      The TC127XA devices are optimized for fast response
      to negative-going changes in V
      DD
      . Systems with an
      inordinate amount of electrical noise on V
      DD
      (such as
      systems using relays) may require a 0.01 μF or 0.1 μF
      bypass capacitor to reduce detection sensitivity. This
      capacitor should be installed as close to the TC127XA
      as possible to keep the capacitor lead length short.
      FIGURE 5-1:
      with Bypass Capacitor.
      Typical Application Circuit
      5.2
      Conventional Voltage Monitoring
      Figure 5-2
      and
      Figure 5-3
      show the TC127XA in
      conventional voltage monitoring applications.
      FIGURE 5-2:
      Battery Voltage Monitor.
      FIGURE 5-3:
      Power Good Monitor.
      5.3
      Using in PIC
      Microcontroller,
      ICSP Applications
      Figure 5-4
      shows the typical application circuit for using
      the TC1270AN for voltage supervisory function when
      the PIC microcontroller will be programmed via the
      In-Circuit Serial Programming (ICSP) feature.
      Additional information is available in TB087,
      “Using
      Voltage Supervisors with PICmicro
      Microcontroller
      Systems which Implement In-Circuit Serial Program-
      ming”
      , DS91087.
      FIGURE 5-4:
      for PIC
      Microcontroller with the ICSP
      Feature.
      Typical Application Circuit
      TC127XA
      V
      DD
      RST
      RST
      V
      SS
      0.1 μF
      MR
      V
      DD
      RST
      V
      SS
      BATLOW
      TC127XA
      +
      V
      DD
      RST
      V
      SS
      Power Good
      TC127XA
      +
      Pwr
      Sply
      Note:
      This operation can only be done using the
      device with the Open-Drain RST pin
      (TC1270AN).
      Note:
      It is recommended that the current into the
      RST pin be current limited by a 1 k
      Ω
      resistor.
      TC1270AN
      V
      DD
      V
      DD
      /V
      PP
      V
      DD
      PIC
      RST
      MCLR
      Reset input)
      (Active-Low)
      V
      SS
      V
      SS
      Microcontroller
      R
      PU
      0.1 μF
      1 k
      Ω
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