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      參數(shù)資料
      

      


      


      
型號(hào)：
DS21448LN+

      

      
廠商：
Maxim Integrated Products

      

      
文件頁(yè)數(shù)：
21/60頁(yè)

      

      
文件大?。?/td>
0K

      

      
描述：
IC LIU QUAD E1/T1/J1 128-LQFP

      

      
產(chǎn)品培訓(xùn)模塊：
Lead (SnPb) Finish for COTS
      
	Obsolescence Mitigation Program
      		

      

      
標(biāo)準(zhǔn)包裝：
72

      

      
類型：
線路接口裝置（LIU）
      		

      

      
驅(qū)動(dòng)器/接收器數(shù)：
4/4
      		

      

      
規(guī)程：
T1/E1/J1
      		

      

      
電源電壓：
3.135 V ~ 3.465 V
      		

      

      
安裝類型：
表面貼裝
      		

      

      
封裝/外殼：
128-LQFP
      		

      

      
供應(yīng)商設(shè)備封裝：
128-LQFP（14x20）
      		

      

      
包裝：
管件
      		

      

      

      

	
      
    
    

    
      
	
      DS21448 3.3V T1/E1/J1 Quad Line Interface
      28 of 60
      6. DIAGNOSTICS
      6.1 In-Band Loop-Code Generation and Detection
      The DS21448 can generate and detect a repeating bit pattern from 1 to 8 or 16 bits in length. To transmit a pattern,
      the user loads the pattern into the transmit code definition (TCD1 and TCD2) registers and selects the proper
      length of the pattern by setting the TC0 and TC1 bits in the in-band code control (IBCC) register. When generating
      a 1-, 2-, 4-, 8-, or 16-bit pattern, the transmit code registers (TCD1 and TCD2) must be filled with the proper code.
      Generation of a 1-, 3-, 5-, or 7-bit pattern only requires TCD1 to be filled. Once this is accomplished, the pattern is
      transmitted, as long as the TLCE control bit (CCR3.3) is enabled. For example, if the user wished to transmit the
      standard loop-up code for CSUs, which is a repeating pattern of ...10000100001..., then 80h would be loaded into
      TCD1, and the length would set using TC1 and TC0 in the IBCC register to 5 bits.
      The DS21448 can detect two separate repeating patterns to allow for a loop-up code and a loop-down code to be
      detected. The user programs the codes in the receive-up code definition (RUPCD1 and RUPCD2) registers and the
      receive-down code definition (RDNCD1 and RDNCD2) registers; the length of each pattern is selected through the
      IBCC register. The DS21448 detects repeating pattern codes with bit-error rates as high as 1 x 10
      -2. The code
      detector has a nominal integration period of 48ms, so after approximately 48ms of receiving either code, the proper
      status bit (LUP at SR.7 and LDN at SR.6) is set to 1. Normally codes are sent for a period of 5 seconds. It is
      recommended that the software poll the DS21448 every 100ms to 1000ms until 5 seconds has elapsed to ensure
      the code is continuously present.
      IBCC (0AH): In-Band Code Control Register
      (MSB)
      (LSB)
      TC1
      TC0
      RUP2
      RUP1
      RUP0
      RDN2
      RDN1
      RDN0
      NAME
      POSITION
      FUNCTION
      TC1
      IBCC.7
      Transmit Code Length Definition Bit 1 (Table 6-A)
      TC0
      IBCC.6
      Transmit Code Length Definition Bit 0. (Table 6-A)
      RUP2
      IBCC.5
      Receive Up Code Length Definition Bit 2 (Table 6-B)
      RUP1
      IBCC.4
      Receive-Up Code Length Definition Bit 1 (Table 6-B)
      RUP0
      IBCC.3
      Receive-Up Code Length Definition Bit 0 (Table 6-B)
      RDN2
      IBCC.2
      Receive-Down Code Length Definition Bit 2 (Table 6-B)
      RDN1
      IBCC.1
      Receive-Down Code Length Definition Bit 1 (Table 6-B)
      RDN0
      IBCC.0
      Receive-Down Code Length Definition Bit 0 (Table 6-B)
      D0
      
    
      
    
    
      


      


      

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      相關(guān)代理商/技術(shù)參數(shù)
      		

      參數(shù)描述
      		

      
      

      
DS21448LN+
功能描述:網(wǎng)絡(luò)控制器與處理器 IC 3.3V E1/T1/J1 Quad Interface RoHS:否 制造商:Micrel 產(chǎn)品:Controller Area Network (CAN) 收發(fā)器數(shù)量: 數(shù)據(jù)速率: 電源電流（最大值）:595 mA 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:PBGA-400 封裝:Tray

      

      
DS21448-LW
功能描述:網(wǎng)絡(luò)控制器與處理器 IC 3.3V E1/T1/J1 Quad Interface RoHS:否 制造商:Micrel 產(chǎn)品:Controller Area Network (CAN) 收發(fā)器數(shù)量: 數(shù)據(jù)速率: 電源電流（最大值）:595 mA 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:PBGA-400 封裝:Tray

      

      
DS21448N
功能描述:網(wǎng)絡(luò)控制器與處理器 IC 3.3V E1/T1/J1 Quad Interface RoHS:否 制造商:Micrel 產(chǎn)品:Controller Area Network (CAN) 收發(fā)器數(shù)量: 數(shù)據(jù)速率: 電源電流（最大值）:595 mA 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:PBGA-400 封裝:Tray

      

      
DS2145
 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Telecommunication IC

      

      
DS21455
功能描述:網(wǎng)絡(luò)控制器與處理器 IC Quad E1-T1-J1 Transceiver RoHS:否 制造商:Micrel 產(chǎn)品:Controller Area Network (CAN) 收發(fā)器數(shù)量: 數(shù)據(jù)速率: 電源電流（最大值）:595 mA 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:PBGA-400 封裝:Tray

      

      
    
    
    
	
      	
    
    
     
     
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