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DS2154 Datasheet(PDF) 77 Page - Dallas Semiconductor |
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DS2154 Datasheet(HTML) 77 Page - Dallas Semiconductor |
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77 / 87 page  DS2154 77 of 87 AC CHARACTERISTICS - MULTIPLEXED PARALLEL (0 °C to 70°C; V DD=5V ±=5% for DS2154L; PORT (MUX=1) -40 °C to +85°C; V DD=5V ±=5% for DS2154LN) PARAMETER SYMBOL MIN TYP MAX UNITS NOTES Cycle Time tCYC 200 ns Pulse Width, DS low or RD high PWEL 100 ns Pulse Width, DS high or RD low PWEH 100 ns Input Rise/Fall times tR, tF 20 ns R/ W Hold Times tRWH 10 ns R/ W Set Up time before DS high tRWS 50 ns CS Set Up time before DS, WR , or RD active tCS 20 ns CS Hold Time tCH 0ns Read Data Hold time tDHR 10 50 ns Write Data Hold time tDHW 0ns Muxed Address valid to AS or ALE fall tASL 15 ns Muxed Address Hold time tAHL 10 ns Delay time DS, WR or RD to AS or ALE rise tASD 20 ns Pulse Width AS or ALE high PWASH 30 ns Delay time, AS or ALE to DS, WR or RD tASED 10 ns Output Data Delay time from DS or RD tDDR 20 80 ns Data Set Up time tDSW 50 ns See Figures 14-1 to 14-3 for details. |
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