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XRT75L03 Datasheet(PDF) 5 Page - Exar Corporation

Part # XRT75L03
Description  THREE CHANNEL E3/DS3/STS-1 LINE INTERFACE UNIT WITH JITTER ATTENUATOR
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Manufacturer  EXAR [Exar Corporation]
Direct Link  http://www.exar.com
Logo EXAR - Exar Corporation

XRT75L03 Datasheet(HTML) 5 Page - Exar Corporation

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XRT75L03
THREE CHANNEL E3/DS3/STS-1 LINE INTERFACE UNIT WITH JITTER ATTENUATOR
REV. 1.0.4
II
4.3.2 Interfacing to the line: ....................................................................................................................... 43
4.4 TRANSMIT DRIVE MONITOR: ............................................................................................................................. 44
4.5 TRANSMITTER SECTION ON/OFF: ...................................................................................................................... 44
5.0 The Receiver Section: ...................................................................................................................... 44
5.1 AGC/EQUALIZER: ............................................................................................................................................ 44
Figure 16. Transmit Driver Monitor set-up. ..................................................................................................... 44
5.1.1 Interference Tolerance: ..................................................................................................................... 45
Figure 17. Interference Margin Test Set up for DS3/STS-1 ........................................................................... 45
5.2 CLOCK AND DATA RECOVERY: ......................................................................................................................... 46
Figure 18. Interference Margin Test Set up for E3. ........................................................................................ 46
TABLE 9: INTERFERENCE MARGIN TEST RESULTS .............................................................................................. 46
5.3 B3ZS/HDB3 DECODER: .................................................................................................................................. 47
5.4 LOS (LOSS OF SIGNAL) DETECTOR: ................................................................................................................ 47
5.4.1 DS3/STS-1 LOS Condition: ................................................................................................................ 47
DISABLING ALOS/DLOS DETECTION: ......................................................................................................... 47
5.4.2 E3 LOS Condition: ............................................................................................................................. 47
TABLE 10: THE ALOS (ANALOG LOS) DECLARATION AND CLEARANCE THRESHOLDS FOR A GIVEN SETTING OF
LOSTHR AND REQEN (DS3 AND STS-1 APPLICATIONS) ................................................................... 47
Figure 19. Loss Of Signal Definition for E3 as per ITU-T G.775 .................................................................... 48
Figure 20. Loss of Signal Definition for E3 as per ITU-T G.775. .................................................................... 48
5.4.3 Muting the Recovered Data with LOS condition: ............................................................................ 49
6.0 Jitter: ................................................................................................................................................. 49
6.1 JITTER TOLERANCE - RECEIVER: ...................................................................................................................... 49
6.1.1 DS3/STS-1 Jitter Tolerance Requirements: ..................................................................................... 49
Figure 21. Jitter Tolerance Measurements ..................................................................................................... 49
6.1.2 E3 Jitter Tolerance Requirements: ................................................................................................... 50
Figure 22. Input Jitter Tolerance For DS3/STS-1 .......................................................................................... 50
Figure 23. Input Jitter Tolerance for E3 ......................................................................................................... 50
6.2 JITTER TRANSFER - RECEIVER/TRANSMITTER: .................................................................................................. 51
6.3 JITTER ATTENUATOR: ...................................................................................................................................... 51
TABLE 11: JITTER AMPLITUDE VERSUS MODULATION FREQUENCY (JITTER TOLERANCE) ..................................... 51
TABLE 12: JITTER TRANSFER SPECIFICATION/REFERENCES ............................................................................... 51
6.3.1 Jitter Generation: ............................................................................................................................... 52
7.0 Serial Host interface: ....................................................................................................................... 52
TABLE 13: JITTER TRANSFER PASS MASKS ....................................................................................................... 52
Figure 24. Jitter Transfer Requirements and Jitter Attenuator Performance .................................................. 52
TABLE 14: FUNCTIONS OF SHARED PINS ............................................................................................................ 53
TABLE 15: XRT75L03 REGISTER MAP - QUICK LOOK ........................................................................................ 54
................................................................................................................................................................. 56
THE REGISTER MAP AND DESCRIPTION FOR THE XRT75L03 3-CHANNEL DS3/E3/STS-1 LIU IC 56
Legend: .................................................................................................................................................................. 56
TABLE 16: COMMAND REGISTER ADDRESS MAP, WITHIN THE XRT75L03 3-CHANNEL DS3/E3/STS-1 LIU W/ JITTER
ATTENUATOR IC ................................................................................................................................. 56
THE GLOBAL/CHIP-LEVEL REGISTERS ............................................................................................... 58
................................................................................................................................................................. 58
REGISTER DESCRIPTION - GLOBAL REGISTERS .............................................................................. 58
TABLE 17: LIST AND ADDRESS LOCATIONS OF GLOBAL REGISTERS .................................................................... 58
TABLE 18: APS/REDUNDANCY CONTROL REGISTER - CR0 (ADDRESS LOCATION = 0X00) .................................. 58
TABLE 19: BLOCK LEVEL INTERRUPT ENABLE REGISTER - CR32 (ADDRESS LOCATION = 0X20) ......................... 61
TABLE 20: BLOCK LEVEL INTERRUPT STATUS REGISTER - CR33 (ADDRESS LOCATION = 0X21) ......................... 62
TABLE 21: DEVICE/PART NUMBER REGISTER - CR62 (ADDRESS LOCATION = 0X3E) .......................................... 63
................................................................................................................................................................. 64
THE PER-CHANNEL REGISTERS ......................................................................................................... 64
TABLE 22: CHIP REVISION NUMBER REGISTER - CR63 (ADDRESS LOCATION = 0X3F) ........................................ 64
TABLE 23: COMMAND REGISTER ADDRESS MAP, WITHIN THE XRT75L03 3-CHANNEL DS3/E3/STS-1 LIU W/ JITTER
ATTENUATOR IC ................................................................................................................................. 64
REGISTER DESCRIPTION - PER CHANNEL REGISTERS ................................................................... 66


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