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XRT75L04D 数据表(PDF) 4 Page - Exar Corporation |
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XRT75L04D 数据表(HTML) 4 Page - Exar Corporation |
4 / 98 page XRT75L04D áç áç áç áç FOUR CHANNEL E3/DS3/STS-1 LINE INTERFACE UNIT WITH SONET DESYNCHRONIZER REV. 1.0.1 1 TABLE OF CONTENTS GENERAL DESCRIPTION.............................................................................................................. 1 FEATURES ..................................................................................................................................................................... 1 APPLICATIONS ............................................................................................................................................................... 1 TRANSMIT INTERFACE CHARACTERISTICS ....................................................................................................................... 2 RECEIVE INTERFACE CHARACTERISTICS ......................................................................................................................... 2 FIGURE 1. BLOCK DIAGRAM OF THE XRT 75L04D .................................................................................................................................. 2 FIGURE 2. PIN OUT OF THE XRT75L04D................................................................................................................................................ 3 ORDERING INFORMATION .....................................................................................................................3 PIN DESCRIPTIONS (BY FUNCTION) .......................................................................................... 4 TRANSMIT INTERFACE .................................................................................................................................................... 4 RECEIVE INTERFACE ...................................................................................................................................................... 7 CLOCK INTERFACE......................................................................................................................................................... 9 ................................................................................................................................................................................... 10 CONTROL AND ALARM INTERFACE...................................................................................................................... 10 OPERATING MODE SELECT.......................................................................................................................................... 12 ................................................................................................................................................................................... 13 SERIAL MICROPROCESSOR INTERFACE ......................................................................................................................... 13 ................................................................................................................................................................................... 14 JITTER ATTENUATOR INTERFACE .................................................................................................................................. 14 ANALOG POWER AND GROUND .................................................................................................................................... 14 DIGITAL POWER AND GROUND...................................................................................................................................... 16 1.0 ELECTRICAL CHARACTERISTICS ....................................................................................................17 TABLE 1: ABSOLUTE MAXIMUM RATINGS ............................................................................................................................................... 17 TABLE 2: DC ELECTRICAL CHARACTERISTICS:....................................................................................................................................... 17 2.0 TIMING CHARACTERISTICS ..............................................................................................................18 FIGURE 3. TYPICAL INTERFACE BETWEEN TERMINAL EQUIPMENT AND THE XRT75L04D (DUAL-RAIL DATA) .............................................. 18 FIGURE 4. TRANSMITTER TERMINAL INPUT TIMING................................................................................................................................. 18 FIGURE 5. RECEIVER DATA OUTPUT AND CODE VIOLATION TIMING .......................................................................................................... 19 FIGURE 6. TRANSMIT INTERFACE CIRCUIT FOR E3, DS3 AND STS-1 RATES ........................................................................................... 19 3.0 LINE SIDE CHARACTERISTICS: ........................................................................................................20 3.1 E3 LINE SIDE PARAMETERS: ...................................................................................................................... 20 FIGURE 7. PULSE MASK FOR E3 (34.368 MBITS/S) INTERFACE AS PER ITU-T G.703 ............................................................................... 20 TABLE 3: E3 TRANSMITTER LINE SIDE OUTPUT AND RECEIVER LINE SIDE INPUT SPECIFICATIONS .............................................................. 20 FIGURE 8. BELLCORE GR-253 CORE TRANSMIT OUTPUT PULSE TEMPLATE FOR SONET STS-1 APPLICATIONS ................................... 21 TABLE 4: STS-1 PULSE MASK EQUATIONS ........................................................................................................................................... 21 TABLE 5: STS-1 TRANSMITTER LINE SIDE OUTPUT AND RECEIVER LINE SIDE INPUT SPECIFICATIONS (GR-253)..................................... 22 FIGURE 9. TRANSMIT OUPUT PULSE TEMPLATE FOR DS3 AS PER BELLCORE GR-499 ........................................................................... 22 TABLE 6: DS3 PULSE MASK EQUATIONS............................................................................................................................................... 23 TABLE 7: DS3 TRANSMITTER LINE SIDE OUTPUT AND RECEIVER LINE SIDE INPUT SPECIFICATIONS (GR-499) ........................................ 23 FIGURE 10. MICROPROCESSOR SERIAL INTERFACE STRUCTURE ............................................................................................................ 24 FIGURE 11. TIMING DIAGRAM FOR THE MICROPROCESSOR SERIAL INTERFACE ....................................................................................... 24 TABLE 8: MICROPROCESSOR SERIAL INTERFACE TIMINGS ( TA = 250C, VDD=3.3V± 5% AND LOAD = 10PF) ........................................ 25 FUNCTIONAL DESCRIPTION:..................................................................................................... 26 4.0 THE TRANSMITTER SECTION: ..........................................................................................................26 4.1 TRANSMIT CLOCK: ....................................................................................................................................... 26 FIGURE 12. SINGLE-RAIL OR NRZ DATA FORMAT (ENCODER AND DECODER ARE ENABLED) .................................................................. 26 FIGURE 13. DUAL-RAIL DATA FORMAT (ENCODER AND DECODER ARE DISABLED).................................................................................... 26 4.2 B3ZS/HDB3 ENCODER: ................................................................................................................................. 27 4.2.1 B3ZS ENCODING: ...................................................................................................................................................... 27 4.2.2 HDB3 ENCODING:...................................................................................................................................................... 27 FIGURE 14. B3ZS ENCODING FORMAT ................................................................................................................................................. 27 FIGURE 15. HDB3 ENCODING FORMAT ................................................................................................................................................. 27 4.3 TRANSMIT PULSE SHAPER: ........................................................................................................................ 28 4.3.1 GUIDELINES FOR USING TRANSMIT BUILD OUT CIRCUIT: ................................................................................. 28 4.3.2 INTERFACING TO THE LINE: .................................................................................................................................... 28 4.4 TRANSMIT DRIVE MONITOR: ....................................................................................................................... 28 FIGURE 16. TRANSMIT DRIVER MONITOR SET-UP................................................................................................................................... 28 4.5 TRANSMITTER SECTION ON/OFF: .............................................................................................................. 29 5.0 THE RECEIVER SECTION: .................................................................................................................30 |
类似零件编号 - XRT75L04D |
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类似说明 - XRT75L04D |
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