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MB90F474LPF Datasheet(PDF) 95 Page - fujitsu semiconductor |
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MB90F474LPF Datasheet(HTML) 95 Page - fujitsu semiconductor |
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95 / 118 page  MB90470 Series 95 (6) Bus Write Timing (VCC = 2.7 V to 3.6 V, VSS = 0.0 V, TA = −40 °C to +85 °C) Notes : • tCP : See (1) Clock Timing Ratings. • VCC = VCC3 = VCC5 Parameter Sym- bol Pin name Condi- tions Value Unit Remarks Min Max Valid address → WR ↓ time tAVWL Address pins, WR tCP − 20 ns WR pulse width tWLWH WRL, WRH 3 tCP / 2 − 25 ns at fcp = 20 MHz 3 tCP / 2 − 20 ns at fcp = 16 MHz Valid data output → WR ↑ time tDVWH Data pins, WR 3 tCP / 2 − 20 ns WR ↑ → data hold time tWHDX WR, Data pins 15 ns at fcp = 20 MHz 20 ns at fcp = 16 MHz 30 ns at fcp = 8 MHz WR ↑ → address valid time tWHAX WR, Address pins tCP / 2 − 10 ns WR ↑ → ALE ↑ time tWHLH WR , ALE tCP / 2 − 15 ns WR ↓ → CLK ↑ time tWLCH WR , CLK tCP / 2 − 20 ns |
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