DS2149 Просмотр технического описания (PDF) - Maxim Integrated

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DS2149

5V T1/J1 Line Interface Unit

Maxim Integrated 

DS2149

LIST OF FIGURES

Figure 1-1. Block Diagram....................................................................................................................................... 4

Figure 2-1. Hardware Mode Pinout ........................................................................................................................ 6

Figure 2-2. Serial Port Mode Pinout....................................................................................................................... 6

Figure 9-1. Serial Data Port Operation for Read Access.................................................................................. 18

Figure 9-2. Serial Data Port Operation for Write Access.................................................................................. 18

Figure 10-1. Loopbacks in the DS2149 Block Diagram.................................................................................... 21

Figure 11-1. Basic Network Interface .................................................................................................................. 25

Figure 11-2. T1 Transmit Pulse Template .......................................................................................................... 26

Figure 11-3. Jitter Tolerance ................................................................................................................................. 27

Figure 11-4. Jitter Attenuation............................................................................................................................... 27

Figure 12-1. Serial Bus Read Timing (MODE1 = 1) .......................................................................................... 29

Figure 12-2. Serial Bus Write Timing (MODE1 = 1) .......................................................................................... 29

Figure 12-3. AC Characteristics for Receive Side ............................................................................................. 30

Figure 12-4. AC Characteristics for Transmit Side ............................................................................................ 31

LIST OF TABLES

Table 2-A. Operating Modes ................................................................................................................................... 5

Table 2-B. Control Pins for Hardware and Software Modes .............................................................................. 5

Table 2-C. Signal Descriptions ............................................................................................................................... 7

Table 4-A. Register Map .......................................................................................................................................... 9

Table 4-B. Register Bit Positions............................................................................................................................ 9

Table 4-C. Jitter Attenuator Selection.................................................................................................................. 10

Table 4-D. Line Code and Interface Selection ................................................................................................... 10

Table 4-E. Line Build-out Selection...................................................................................................................... 10

Table 4-F. Data Pattern Selection ........................................................................................................................ 11

Table 9-A. CLKE Pin Selection............................................................................................................................. 17

Table 9-B. Control and Operation Mode Selection............................................................................................ 19

Table 10-A. Diagnostic Modes.............................................................................................................................. 19

Table 11-A. Specifications for Receive Transformer......................................................................................... 24

Table 11-B. Specifications for Transmit Transformer........................................................................................ 24

Table 11-C. Transformer Turns Ratio vs. Series Resistance .......................................................................... 24

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