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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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M700000002 датащи(PDF) 74 Page - SPANSION |
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M700000002 датащи(HTML) 74 Page - SPANSION |
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74 / 128 page  72 Am70PDL127BDH/Am70PDL129BDH November 25, 2003 AD VAN C E INFORM ATION pSRAM AC CHARACTERISTICS Read Cycle Notes: 1. tOD, tODo, tBD, and tODW are defined as the time at which the outputs achieve the open circuit condition and are not referenced to output voltage levels. 2. If CE#f1, LB#, or UB# goes low at the same time or before WE# goes high, the outputs will remain at high impedance. 3. If CE#f1, LB#, or UB# goes low at the same time or after WE# goes low, the outputs will remain at high impedance. Figure 23. Psuedo SRAM Read Cycle Parameter Symbol Description Speed Unit 66 85 t RC Read Cycle Time Min 70 85 ns t ACC Address Access Time Max 70 85 ns t CO Chip Enable Access Time Max 70 85 ns tOE Output Enable Access Time Max 25 ns t BA Data Byte Control Access Time Max 25 ns tCOE Chip Enable Low to Output Active Min 10 ns t OEE Output Enable Low to Output Active Min 0 ns tBE Data Byte Control Low to Output Active Min 0 ns t OD Chip Enable High to Output High-Z Max 20 ns tODO Output Enable High to Output High-Z Max 20 ns t BD Data Byte Control High to Output High-Z Max 20 ns t OH Output Data Hold from Address Change Min 10 ns t PM Page Mode Time Min 70 ns t PC Page Mode Cycle Time Min 30 ns t AA Page Mode Address Access Time Max 30 ns t AOH Page Output Data Hold Time Min 10 ns tRC tACC Addresses A20 to A0 CE#1s CE2s OE# WE# LB#, UB# DOUT DQ15 to DQ0 tCO tOH Fixed High High-Z High-Z tOE tBA tOD tODO tBD Valid Data Out Indeterminate tBE tOEE tCOE |
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