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UPD43257BCZ-70L Datasheet(PDF) 9 Page - NEC |
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UPD43257BCZ-70L Datasheet(HTML) 9 Page - NEC |
9 / 20 page Data Sheet M10693EJ7V0DS00 9 µµµµPD43257B Read Cycle Parameter Symbol µPD43257B-70 µPD43257B-85 Unit Condition MIN. MAX. MIN. MAX. Read cycle time tRC 70 85 ns Address access time tAA 70 85 ns Note 1 /CE1 access time tCO1 70 85 ns CE2 access time tCO2 70 85 ns Output hold from address change tOH 10 10 ns /CE1 to output in low impedance tLZ1 10 10 ns Note 2 CE2 to output in low impedance tLZ2 10 10 ns /CE1 to output in high impedance tHZ1 30 30 ns CE2 to output in high impedance tHZ2 30 30 ns Notes 1. See the output load shown in Figure 1. 2. See the output load shown in Figure 2. Remark These AC characteristics are in common regardless of package types and L, LL versions. Read Cycle Timing Chart tHZ2 tRC tOH tHZ1 tLZ2 tCO2 tLZ1 tCO1 tAA High impedance Data out CE2 (Input) /CE1 (Input) Address (Input) I/O (Output) Remark In read cycle, /WE should be fixed to high level. |
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