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XRT79L73IB Datasheet(PDF) 5 Page - Exar Corporation

Part # XRT79L73IB
Description  3 - CHANNEL DS3/E3 ATM UNI/PPP COMBO IC
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Manufacturer  EXAR [Exar Corporation]
Direct Link  http://www.exar.com
Logo EXAR - Exar Corporation

XRT79L73IB Datasheet(HTML) 5 Page - Exar Corporation

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PRELIMINARY
XRT79L73
3 - CHANNEL DS3/E3 ATM UNI/PPP COMBO IC
REV. P1.0.0
B
TRANSMIT PAYLOAD DATA INPUT INTERFACE ........................................................ 55
TRANSMIT PAYLOAD DATA INPUT INTERFACE - TIMING REQUIREMENTS..................................... 55
TABLE 9: TIMING INFORMATION FO RTHE TRNASMIT PAYLOAD DATA INPUT INTERFACE BLOCK .......................................................... 55
FIGURE 11. TIMING DIAGRAM FOR THE TRANSMIT PAYLOAD DATA INPUT INTERFACE WHEN THE XRT79L73 IS OPERATING IN BOTH THE DS3
AND
LOOP-TIMING MODES .............................................................................................................................................. 56
FIGURE 12. TIMING DIAGRAM FOR THE TRANSMIT PAYLOAD DATA INPUT INTERFACE WHEN THE XRT79L73 IS OPERATING IN BOTH THE DS3
AND
LOCAL-TIMING MODES............................................................................................................................................. 57
FIGURE 13. TIMING DIAGRAM FOR THE TRANSMIT PAYLOAD DATA INPUT INTERFACE WHEN THE XRT79L73 IS OPERATING IN BOTH THE DS3/
NIBBLE-PARALLEL AND LOOP-TIMING MODES .................................................................................................................. 57
FIGURE 14. TIMING DIAGRAM FOR THE TRANSMIT PAYLOAD DATA INPUT INTERFACE WHEN THE XRT79L73 IS OPERATING IN BOTH THE DS3/
NIBBLE-PARALLEL AND LOCAL-TIMING MODES ................................................................................................................. 58
TRANSMIT OVERHEAD DATA INPUT INTERFACE...................................................... 59
TRANSMIT OVERHEAD DATA INPUT INTERFACE - TIMING REQUIREMENTS.................................. 59
TABLE 10: TIMING INFORMATION FOR THE TRANSMIT OVERHEAD DATA INPUT INTERFACE BLOCK ..................................................... 59
FIGURE 15. TIMING DIAGRAM FOR THE TRANSMIT OVERHEAD DATA INPUT INTERFACE (METHOD 1ACCESS) .................................... 61
FIGURE 16. TIMING DIAGRAM FOR THE TRANSMIT OVERHEAD DATA INPUT INTERFACE (METHOD 2ACCESS) .................................... 61
RECEIVE PAYLOAD DATA OUTPUT INTERFACE ....................................................... 62
RECEIVE PAYLOAD DATA OUTPUT INTERFACE - TIMING REQUIREMENTS ................................... 62
TABLE 11: TIMING INFORMATION FOR THE RECEIVE PAYLOAD DATA OUTPUT INTERFACE BLOCK ...................................................... 62
FIGURE 17. TIMING DIAGRAM FOR THE RECEIVE PAYLOAD DATA OUTPUT INTERFACE (SERIAL MODE).............................................. 62
FIGURE 18. TIMING DIAGRAM FOR THE RECEIVE PAYLOAD DATA OUTPUT INTERFACE (NIBBLE-PARALLEL MODE) ............................. 63
RECEIVE OVERHEAD DATA OUTPUT INTERFACE .................................................... 64
RECEIVE OVERHEAD DATA OUTPUT INTERFACE - TIMING REQUIREMENTS ................................ 64
AC ELECTRICAL CHARACTERISTICS (CONT.)................................................................................................. 64
FIGURE 19. TIMING DIAGRAM FOR THE RECEIVE OVERHEAD DATA OUTPUT INTERFACE (METHOD 1- USING RXOHCLK) .................. 65
FIGURE 20. TIMING DIAGRAM FOR THE RECEIVE OVERHEAD DATA OUTPUT INTERFACE (METHOD 2- USING RXOHENABLE) ............ 65
RECEIVE UTOPIA INTERFACE ...................................................................................... 66
RECEIVE UTOPIA INTERFACE ............................................................................................................... 66
FIGURE 21. TIMING DIAGRAM FOR THE RECEIVE UTOPIA INTERFACE BLOCK .................................................................................. 66
TABLE 12: TIMING INFORMATION FOR THE RECEIVE UTOPIA INTERFACE BLOCK ............................................................................. 66
ORDERING INFORMATION ............................................................................................ 68
PACKAGE DIMENSIONS ................................................................................................ 68
REVISION HISTORY ...................................................................................................................................... 69


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