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MC-458CB641PS-A80 Datasheet(PDF) 9 Page - NEC |
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MC-458CB641PS-A80 Datasheet(HTML) 9 Page - NEC |
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9 / 6 page  Data Sheet M14015EJ4V0DS00 9 MC-458CB641ES, 458CB641PS Asynchronous Characteristics Parameter Symbol -A 80 -A 10 Unit Note MIN. MAX. MIN. MAX. ACT to REF/ACT command period (Operation) tRC 70 70 ns REF to REF/ACT command period (Refresh) tRC1 70 78 ns ACT to PRE command period tRAS 48 120,000 50 120,000 ns PRE to ACT command period tRP 20 20 ns Delay time ACT to READ/WRITE command tRCD 20 20 ns ACT(one) to ACT(another) command period tRRD 16 20 ns Data-in to PRE command period /CAS latency = 3 tDPL3 810 ns /CAS latency = 2 tDPL2 810 ns Data-in to ACT(REF) command /CAS latency = 3 tDAL3 1CLK+20 1CLK+20 ns period (Auto precharge) /CAS latency = 2 tDAL2 1CLK+20 1CLK+20 ns Mode register set cycle time tRSC 22 CLK Transition time tT 0.5 30 1 30 ns Refresh time (4,096 refresh cycles) tREF 64 64 ms |
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