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CAT28C257 Fiches technique(PDF) 5 Page - ON Semiconductor |
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CAT28C257 Fiches technique(HTML) 5 Page - ON Semiconductor |
5 / 13 page CAT28C257 http://onsemi.com 5 Table 8. A.C. CHARACTERISTICS, WRITE CYCLE (VCC = 5 V ±10%, unless otherwise specified.) Symbol Parameter 28C257−12 28C257−15 Units Min Typ Max Min Typ Max tWC Write Cycle Time 5 5 ms tAS Address Setup Time 0 0 ns tAH Address Hold Time 50 50 ns tCS CE Setup Time 0 0 ns tCH CE Hold Time 0 0 ns tCW (Note 10) CE Pulse Time 100 100 ns tOES OE Setup Time 0 0 ns tOEH OE Hold Time 0 0 ns tWP (Note 10) WE Pulse Width 100 100 ns tDS Data Setup Time 50 50 ns tDH Data Hold Time 0 0 ns tINIT (Note 11) Write Inhibit Period After Power−up 5 10 5 10 ms tBLC (Notes 11, 12) Byte Load Cycle Time 0.1 100 0.1 100 ms 10.A write pulse of less than 20 ns duration will not initiate a write cycle. 11. This parameter is tested initially and after a design or process change that affects the parameter. 12.A timer of duration tBLC max. begins with every LOW to HIGH transition of WE. If allowed to time out, a page or byte write will begin; however a transition from HIGH to LOW within tBLC max. stops the timer. Figure 2. A.C. Testing Input/Output Waveform (Note 13) INPUT PULSE LEVELS REFERENCE POINTS 2.0 V 0.8 V 0.0 V VCC − 0.3 V 13.Input rise and fall times (10% and 90%) < 10 ns. Figure 3. A.C. Testing Load Circuit (example) 1.3 V DEVICE UNDER TEST 1N914 3.3 K OUT CL = 100 pF CL INCLUDES JIG CAPACITANCE |
Numéro de pièce similaire - CAT28C257 |
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Description similaire - CAT28C257 |
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