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GMS90C320PL40 数据表(PDF) 39 Page - Hynix Semiconductor |
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GMS90C320PL40 数据表(HTML) 39 Page - Hynix Semiconductor |
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39 / 46 page ![]() GMS90C320 OCT. 2000 Ver 1.2 35 AC Characteristics for 50MHz External Data Memory Characteristics Advance Information (50MHz) External Clock Drive Parameter Symbol at 50 MHz Clock Variable Clock 1/tCLCL =3.5 to 50MHz Unit Min. Max. Min. Max. RD pulse width tRLRH 90 - 6tCLCL-30 - ns WR pulse width tWLWH 90 - 6tCLCL-30 - ns Address hold after ALE tLLAX2 25 - 2tCLCL-15 - ns RD to valid data in tRLDV -60 - 5tCLCL-40 ns Data hold after RD tRHDX 0- 0 - ns Data float after RD tRHDZ -28 - 2tCLCL-12 ns ALE to valid data in tLLDV - 120 - 8tCLCL-40 ns Address to valid data in tAVDV - 125 - 9tCLCL-55 ns ALE to WR or RD tLLW L 45 75 3tCLCL-15 3tCLCL+15 ns Address valid to WR or RD tAVW L 50 - 4tCLCL-30 - ns WR or RD high to ALE high tWHLH 535 tCLCL-15 tCLCL+15 ns Data valid to WR transition tQVW X 5- tCLCL-15 - ns Data setup before WR tQVW H 100 - 7tCLCL-40 - ns Data hold after WR tWHQX 5- tCLCL-15 - ns Address float after RD tRLAZ -0 - 0 ns Parameter Symbol Variable Oscillator (Freq. = 3.5 to 50MHz) Unit Min. Max. Oscillator period tCLCL 20 285.7 ns High time tCHCX 10 tCLCL -tCLCX ns Low time tCLCX 10 tCLCL -tCHCX ns Rise time tCLCH -10 ns Fall time tCHCL -10 ns |
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