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XRT79L74IB Datasheet(PDF) 5 Page - Exar Corporation |
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XRT79L74IB Datasheet(HTML) 5 Page - Exar Corporation |
5 / 70 page PRELIMINARY XRT79L74 4 - CHANNEL DS3/E3 ATM UNI/PPP COMBO IC REV. P1.0.0 B TRANSMIT PAYLOAD DATA INPUT INTERFACE - TIMING REQUIREMENTS..................................... 54 TABLE 9: TIMING INFORMATION FO RTHE TRNASMIT PAYLOAD DATA INPUT INTERFACE BLOCK .......................................................... 54 FIGURE 11. TIMING DIAGRAM FOR THE TRANSMIT PAYLOAD DATA INPUT INTERFACE WHEN THE XRT79L74 IS OPERATING IN BOTH THE DS3 AND LOOP-TIMING MODES .............................................................................................................................................. 55 FIGURE 12. TIMING DIAGRAM FOR THE TRANSMIT PAYLOAD DATA INPUT INTERFACE WHEN THE XRT79L74 IS OPERATING IN BOTH THE DS3 AND LOCAL-TIMING MODES............................................................................................................................................. 56 FIGURE 13. TIMING DIAGRAM FOR THE TRANSMIT PAYLOAD DATA INPUT INTERFACE WHEN THE XRT79L74 IS OPERATING IN BOTH THE DS3/ NIBBLE-PARALLEL AND LOOP-TIMING MODES .................................................................................................................. 56 FIGURE 14. TIMING DIAGRAM FOR THE TRANSMIT PAYLOAD DATA INPUT INTERFACE WHEN THE XRT79L74 IS OPERATING IN BOTH THE DS3/ NIBBLE-PARALLEL AND LOCAL-TIMING MODES................................................................................................................. 57 TRANSMIT OVERHEAD DATA INPUT INTERFACE...................................................... 58 TRANSMIT OVERHEAD DATA INPUT INTERFACE - TIMING REQUIREMENTS.................................. 58 TABLE 10: TIMING INFORMATION FOR THE TRANSMIT OVERHEAD DATA INPUT INTERFACE BLOCK ..................................................... 58 FIGURE 15. TIMING DIAGRAM FOR THE TRANSMIT OVERHEAD DATA INPUT INTERFACE (METHOD 1 ACCESS) .................................... 60 FIGURE 16. TIMING DIAGRAM FOR THE TRANSMIT OVERHEAD DATA INPUT INTERFACE (METHOD 2 ACCESS) .................................... 60 RECEIVE PAYLOAD DATA OUTPUT INTERFACE ....................................................... 61 RECEIVE PAYLOAD DATA OUTPUT INTERFACE - TIMING REQUIREMENTS ................................... 61 TABLE 11: TIMING INFORMATION FOR THE RECEIVE PAYLOAD DATA OUTPUT INTERFACE BLOCK ...................................................... 61 FIGURE 17. TIMING DIAGRAM FOR THE RECEIVE PAYLOAD DATA OUTPUT INTERFACE (SERIAL MODE).............................................. 61 FIGURE 18. TIMING DIAGRAM FOR THE RECEIVE PAYLOAD DATA OUTPUT INTERFACE (NIBBLE-PARALLEL MODE) ............................. 62 RECEIVE OVERHEAD DATA OUTPUT INTERFACE .................................................... 63 RECEIVE OVERHEAD DATA OUTPUT INTERFACE - TIMING REQUIREMENTS ................................ 63 AC ELECTRICAL CHARACTERISTICS (CONT.)................................................................................................. 63 FIGURE 19. TIMING DIAGRAM FOR THE RECEIVE OVERHEAD DATA OUTPUT INTERFACE (METHOD 1 - USING RXOHCLK) .................. 64 FIGURE 20. TIMING DIAGRAM FOR THE RECEIVE OVERHEAD DATA OUTPUT INTERFACE (METHOD 2 - USING RXOHENABLE) ............ 64 RECEIVE UTOPIA INTERFACE ...................................................................................... 65 RECEIVE UTOPIA INTERFACE ............................................................................................................... 65 FIGURE 21. TIMING DIAGRAM FOR THE RECEIVE UTOPIA INTERFACE BLOCK .................................................................................. 65 TABLE 12: TIMING INFORMATION FOR THE RECEIVE UTOPIA INTERFACE BLOCK ............................................................................. 65 ORDERING INFORMATION ............................................................................................ 67 PACKAGE DIMENSIONS ................................................................................................ 67 REVISION HISTORY ...................................................................................................................................... 68 |
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