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CAT28C257HN-90T датащи(PDF) 5 Page - Catalyst Semiconductor |
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CAT28C257HN-90T датащи(HTML) 5 Page - Catalyst Semiconductor |
5 / 10 page Advanced CAT28C257 5 Doc. No. 25073-00 2/98 Note: (1) This parameter is tested initially and after a design or process change that affects the parameter. (2) Input rise and fall times (10% and 90%) < 10 ns. (3) A write pulse of less than 20ns duration will not initiate a write cycle. (4) 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. 5096 FHD F04 Figure 1. A.C. Testing Input/Output Waveform(2) 1.3V DEVICE UNDER TEST 1N914 3.3K CL = 100 pF OUT CL INCLUDES JIG CAPACITANCE Figure 2. A.C. Testing Load Circuit (example) INPUT PULSE LEVELS REFERENCE POINTS 2.0 V 0.8 V 2.4 V 0.45 V 5096 FHD F03 A.C. CHARACTERISTICS, Write Cycle VCC=5V ±10%, unless otherwise specified 28C257-90 28C257-12 28C257-15 Symbol Parameter Min. Max. Min. Max. Min. Max. Units tWC Write Cycle Time 5 5 5 ms tAS Address Setup Time 0 0 0 ns tAH Address Hold Time 50 50 50 ns tCS CE Setup Time 0 0 0 ns tCH CE Hold Time 0 0 0 ns tCW(3 CE Pulse Time 100 100 100 ns tOES OE Setup Time 0 0 0 ns tOEH OE Hold Time 0 0 0 ns tWP(3) WE Pulse Width 100 100 100 ns tDS Data Setup Time 50 50 50 ns tDH Data Hold Time 0 0 0 ns tINIT(1) Write Inhibit Period After Power-up 5 10 5 10 5 10 ms tBLC(1)(4) Byte Load Cycle Time 0.1 100 0.1 100 0.1 100 µs |
Аналогичный номер детали - CAT28C257HN-90T |
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Аналогичное описание - CAT28C257HN-90T |
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