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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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M65KA512AB датащи(PDF) 29 Page - STMicroelectronics |
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M65KA512AB датащи(HTML) 29 Page - STMicroelectronics |
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29 / 55 page  M65KA512AB DC and ac parameters 29/55 Table 13. AC characteristics 2 Symbol Alt. Parameter M65KA512ABM65KA51 2AB Unit Min. Max. tDPL Delay Time, Write Command to Data Input 2 - (1) tDAL Data Input Valid to Precharge Command CAS Latency = 2 2*tCK + 22.5 -ns CAS Latency = 3 - ns tMRD tRSC Mode Register Set Cycle Time 2 - (1) tRC (2) RAS Cycle Time (normal operation) 90 - ns tRC RAS Cycle Time (refresh operation) 112.5 - ns tRC2 RAS Cycle Time (Self Refresh Exit to Refresh or Bank/Row Activate Command) 120 - ns tRCD Delay Time, RAS Active to CAS Active 27.5 - ns tRAS RAS Active Time 60 120000 ns tRP RAS Precharge Time 22.5 - ns tRRD Delay Time, RAS Active to RAS Bank Active 2 - (1) tREF Refresh Time - 64 ms tT Input Transition Time between VIL and VIH 0.5 30 ns 1. The unit is the system Clock cycle time. 2. A new command can be issued tRC after the Self Refresh mode is exited. |
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