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EM421M1684LBA-75FE Datasheet(PDF) 7 Page - Eorex Corporation |
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EM421M1684LBA-75FE Datasheet(HTML) 7 Page - Eorex Corporation |
7 / 20 page eorex Preliminary EM42BM1684LBB Jul. 2006 www.eorex.com AC Operating Test Conditions (VDD=1.8V ± 0.1V, TA=0°C ~70°C) Item Conditions Output Reference Level 0.9V/0.9V Output Load See diagram as below Input Signal Level 1.6V/0.2V Transition Time of Input Signals 0.5ns Input Reference Level 0.9V AC Operating Test Characteristics (VDD=1.8V±0.1V, TA=0°C ~70°C) -7.5 Symbol Parameter Min. Max. Units tDQCK DQ output access from CLK,/CLK 2 6 ns tDQSCK DQS output access from CLK,/CLK 2 6 ns tCL,tCH CL low/high level width 0.45 0.55 tCK tCK Clock Cycle Time 7.5 - ns tDH,tDS DQ and DM hold/setup time 0.8 - ns tDIPW DQ and DM input pulse width for each input 1.75 - ns tHZ,tLZ Data out high/low impedance time from CLK,/CLK 1 6 ns tDQSQ DQS-DQ skew for associated DQ signal - 0.65 ns tDQSS Write command to first latching DQS transition 0.75 1.25 tCK tDSL,tDSH DQS input valid window 0.2 - tCK tMRD Mode Register Set command cycle time 2 - tCK tWPRES Write Preamble setup time 0 - ns tWPST Write Preamble 0.4 0.6 tCK tIH,tIS Address/control input hold/setup time 1.3 - ns tRPRE Read Preamble 0.9 1.1 tCK 7/20 |
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