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M68AR024D 数据表(PDF) 13 Page - STMicroelectronics |
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M68AR024D 数据表(HTML) 13 Page - STMicroelectronics |
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13 / 19 page  13/19 M68AR024D Table 8. Write Mode AC Characteristics Note: 1. At any given temperature and voltage condition, tWHQZ is less than tWLQX for any given device. 2. These parameters are defined as the time at which the outputs achieve the open circuit conditions and are not referenced to output voltage levels. Symbol Parameter M68AR024D Unit 70 tAVAV Write Cycle Time Min 70 ns tAVBH Address Valid to LB, UB High Min 60 ns tAVBL Addess Valid to LB, UB Low Min 0 ns tAVEH Address Valid to Chip Enable High Min 60 ns tAVEL Address valid to Chip Enable Low Min 0 ns tAVWH Address Valid to Write Enable High Min 60 ns tAVWL Address Valid to Write Enable Low Min 0 ns tBHAX LB, UB High to Address Transition Min 0 ns tBHDX LB, UB High to Input Transition Min 0 ns tBLBH LB, UB Low to LB, UB High Min 60 ns tBLEH LB, UB Low to Chip Enable High Min 60 ns tBLWH LB, UB Low to Write Enable High Min 60 ns tDVBH Input Valid to LB, UB High Min 30 ns tDVEH Input Valid to Chip Enable High Min 30 ns tDVWH Input Valid to Write Enable High Min 30 ns tEHAX Chip Enable High to Address Transition Min 0 ns tEHDX Chip enable High to Input Transition Min 0 ns tELBH Chip Enable Low to LB, UB High Min 60 ns tELEH Chip Enable Low to Chip Enable High Min 60 ns tELWH Chip Enable Low to Write Enable High Min 60 ns tWHAX Write Enable High to Address Transition Min 0 ns tWHDX Write Enable High to Input Transition Min 0 ns tWHQX (1) Write Enable High to Output Transition Min 5 ns tWLBH Write Enable Low to LB, UB High Min 60 ns tWLEH Write Enable Low to Chip Enable High Min 60 ns tWLQZ (1, 2) Write Enable Low to Output Hi-Z Max 20 ns tWLWH Write Enable Low to Write Enable High Min 50 ns |
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