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M28W640 データシート(PDF) 28 Page - STMicroelectronics |
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M28W640 データシート(HTML) 28 Page - STMicroelectronics |
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28 / 54 page  M28W640CT, M28W640CB 28/54 Table 17. Write AC Characteristics, Chip Enable Controlled Note: 1. Sampled only, not 100% tested. 2. Applicable if VPP is seen as a logic input (VPP <3.6V). Symbol Alt Parameter M28W640C Unit 80 90 tAVAV tWC Write Cycle Time Min 80 90 ns tAVEH tAS Address Valid to Chip Enable High Min 45 50 ns tDVEH tDS Data Valid to Chip Enable High Min 45 50 ns tEHAX tAH Chip Enable High to Address Transition Min 0 0 ns tEHDX tDH Chip Enable High to Data Transition Min 0 0 ns tEHEL tCPH Chip Enable High to Chip Enable Low Min 25 30 ns tEHGL Chip Enable High to Output Enable Low Min 25 30 ns tEHWH tWH Chip Enable High to Write Enable High Min 0 0 ns tELEH tCP Chip Enable Low to Chip Enable High Min 45 50 ns tELQV Chip Enable Low to Output Valid Min 80 90 ns tQVVPL (1,2) Output Valid to VPP Low Min 0 0 ns tQVWPL Data Valid to Write Protect Low Min 0 0 ns tVPHEH (1) tVPS VPP High to Chip Enable High Min 200 200 ns tWLEL tCS Write Enable Low to Chip Enable Low Min 0 0 ns tWPHEH Write Protect High to Chip Enable High Min 45 50 ns |
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