(VD = 3.0 to " /> 
              


      
    



      

      
  
      
    
    
    
      
      
    
      
  
      
  
  

      





 
 




 
 


      

    
      


      參數(shù)資料
      

      


      


      
型號：
SI2494-A-FM

      

      
廠商：
Silicon Laboratories Inc

      

      
文件頁數(shù)：
67/70頁

      

      
文件大?。?/td>
0K

      

      
描述：
IC ISOMODEM 56KBPS 38-QFN

      

      
標準包裝：
364

      

      
系列：
*

      

      

      

	
      
    
    

    
      
	
      Si2494/39
      Rev. 1.0
      7
      Table 4. Loop Characteristics
      (VD = 3.0 to 3.6 V, TA = 0 to 70 °C for F-grade, TA = –40 to 85 °C for G-grade)
      Parameter
      Symbol
      Test Condition
      Min
      Typ
      Max
      Unit
      DC Termination Voltage
      VTR
      IL = 20 mA, ILIM1 =0
      DCV = 00, MINI = 11, DCR = 0
      ——
      6.0
      V
      DC Termination Voltage
      VTR
      IL = 120 mA, ILIM = 0
      DCV = 00, MINI = 11, DCR = 0
      9—
      —
      V
      DC Termination Voltage
      VTR
      IL =20mA, ILIM =0
      DCV = 11, MINI = 00, DCR = 0
      ——
      7.5
      V
      DC Termination Voltage
      VTR
      IL = 120 mA, ILIM = 0
      DCV = 11, MINI = 00, DCR = 0
      9—
      —
      V
      DC Termination Voltage
      VTR
      IL =20mA, ILIM =1
      DCV = 11, MINI = 00, DCR = 0
      ——
      7.5
      V
      DC Termination Voltage
      VTR
      IL =60mA, ILIM =1
      DCV = 11, MINI = 00, DCR = 0
      40
      —
      V
      DC Termination Voltage
      VTR
      IL =50mA, ILIM =1
      DCV = 11, MINI = 00, DCR = 0
      ——
      40
      V
      On-Hook Leakage Current
      ILK
      VTR = –48 V
      —
      5
      A
      Operating Loop Current
      ILP
      MINI = 00, ILIM = 0
      10
      —
      120
      mA
      Operating Loop Current
      ILP
      MINI = 00, ILIM = 1
      10
      —
      60
      mA
      DC Ring Current
      DC current flowing through ring
      detection circuitry
      —1.5
      3
      A
      Ring Detect Voltage2
      VRD
      RT = 0
      12
      15
      18
      VRMS
      Ring Detect Voltage2
      VRD
      RT = 1
      18
      21
      25
      VRMS
      Ring Frequency
      FR
      15
      —
      68
      Hz
      Ringer Equivalence Number
      REN
      —
      0.2
      Notes:
      1.
      ILIM = U67, bit 9; DCV = U67, bits 3:2; MINI = U67, bits 13:12; DCR = U67, bit 7; RT = U67, bit 0.
      2.
      The ring signal is guaranteed to not be detected below the minimum. The ring signal is guaranteed to be detected
      above the maximum.
      Si3018
      TIP
      RING
      10 F
      600
      IL
      VTR
      +
      –
      
    
      
    
    
      


      


      

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