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AT17C256-10PI Datasheet(PDF) 7 Page - ATMEL Corporation |
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AT17C256-10PI Datasheet(HTML) 7 Page - ATMEL Corporation |
7 / 10 page AT17 Series 7 AC Characteristics for AT17C256 V CC = 5V ± 5% Commercial / VCC = 5V ± 10% Ind./Mil. Symbol Description Commercial Industrial/Military Units Min Max Min Max T OE (2) OE to Data Delay 25 25 ns T CE (2) CE to Data Delay 45 45 ns T CAC (2) CLK to Data Delay 50 55 ns T OH (2) Data Hold From CE, OE, or CLK 0 0 ns T DF (3) CE or OE to Data Float Delay 50 50 ns T LC CLK Low Time 20 20 ns T HC CLK High Time 20 20 ns T SCE CE Setup Time to CLK (to guarantee proper counting) 35 40 ns T HCE CE Hold Time to CLk (to guarantee proper counting) 0 0 ns T HOE OE High Time (guarantees counter is reset) 20 20 ns F MAX MAX Input Clock Frequency 12.5 12.5 MHz AC Characteristics for AT17C256 When Cascading V CC = 5V± 5% Commercial / VCC = 5V ± 10% Ind./Mil. Notes: 1. Preliminary specifications for military operating range only. 2. AC test load = 50 pf. 3. Float delays are measured with 5 pF AC loads. Transition is measured ±200 mV from steady state active levels. Symbol Description Commercial Industrial/Military Units Min Max Min Max T CDF (3) CLK to Data Float Delay 50 50 ns T OCK (2) CLK to CEO Delay 35 40 ns T OCE (2) CE to CEO Delay 35 35 ns T OOE (2) RESET/OE to CEO Delay 30 35 ns |
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