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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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PC87570 датащи(PDF) 139 Page - National Semiconductor (TI) |
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PC87570 датащи(HTML) 139 Page - National Semiconductor (TI) |
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139 / 168 page  139 Device Specifications www.national.com t1 19-8, 19-10 to 19-12 Input setup time D0-15 Before RE CLK 15 ns 30 ns t2 19-8, 19-10 to 19-12 Input hold time D0-15 After RE CLK 0 0 BIU Output Signals t3 19-8 to 19-13 Output valid time A0-17, BE0,1CBRD, D0-15 After RE CLK 14 ns 17 ns t4 19-8 to 19-13 Output valid time BST0-2 After RE CLK 0.5 * tCLK + 14 ns 0.5 * tCLK + 20 ns t5 19-8 to 19-12 Output active/inactive time RD, SEL0-1, SELIO After RE CLK 14 ns 17 ns t6 19-8, 19-9 Output active/inactive time WR0-1 After RE CLK 0.5 * tCLK + 14 ns 0.5 * tCLK + 17 ns t7 19-10 Minimum inactive time RD After RE RD tCLK - 5 ns tCLK - 5 ns t8 19-8, 19-9 Output float time A0-17, D0-15, RD, SEL0-1,SELIO,WR0-1 After RE CLK 14 ns 17 ns t9 19-8, 19-9 Minimum delay time From RE RD to D0-15 drive tCLK - 8 ns tCLK - 8 ns t10 19-9 Minimum delay time From RE RD to RE SELn 0 ns 0 ns t11 19-9 Minimum delay time From RE SELx to FE SELy 0 ns 0 ns t12 19-8 to 19-13 Output hold time A0-17, BE0-1, CBRD, D0-15, RD, SEL0-1, SELIO After RE CLK 0 ns 0 ns t13 19-8 to 19-13 Output hold time BST0-2, WR0-1 After RE CLK 0.5 * tCLK - 4 ns 0.5 * tCLK - 4 ns t14 19-9 D0-15 valid in late write bus cycles Before RE WR0-1 (K + 0.5) * tCLK - 6 ns 1 (K + 0.5) * tCLK - 8 ns 1 Symbol Figure Description Reference Conditions VCC = 5 V 10% VCC = 3.3 V ± 10% Min Max Min Max |
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