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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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DS5000FP датащи(PDF) 11 Page - Dallas Semiconductor |
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DS5000FP датащи(HTML) 11 Page - Dallas Semiconductor |
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11 / 22 page  DS5000FP 11 of 22 AC CHARACTERISTICS: EXPANDED BUS MODE TIMING SPECIFICATIONS (VCC = 5V ±5%, TA = 0°C to +70°C.) # PARAMETER SYMBOL MIN MAX UNITS 1 Oscillator Frequency 1/tCLK 1.0 16 MHz 2 ALE Pulse Width tALPW 2tCLK -40 ns 3 Address Valid to ALE Low tAVALL tCLK -40 ns 4 Address Hold After ALE Low tAVAAV tCLK -35 ns at 12MHz 4tCLK -150 5 ALE Low to Valid Instruction In at 16MHz tALLVI 4tCLK -90 ns 6 ALE Low to PSEN Low tALLPSL tCLK -25 ns 7 PSEN Pulse Width tPSPW 3tCLK -35 ns at 12MHz 3tCLK -150 8 PSEN Low to Valid Instruction In at 16MHz tPSLVI 3tCLK -90 ns 9 Input Instruction Hold after PSEN Going High tPSIV 0 ns 10 Input Instruction Float after PSEN Going High tPSIX tCLK -20 ns 11 Address Hold after PSEN Going High tPSAV tCLK -8 ns at 12MHz 5tCLK -150 12 Address Valid to Valid Instruction In at 16MHz tAVVI 5tCLK -90 ns 13 PSEN Low to Address Float tPSLAZ 0 ns 14 RD Pulse Width tRDPW 6tCLK -100 ns 15 WR Pulse Width tWRPW 6tCLK -100 ns at 12MHz 5tCLK -165 16 RD Low to Valid Data In at 16MHz tRDLDV 5tCLK -105 ns 17 Data Hold after RD High tRDHDV 0 ns 18 Data Float after RD High tRDHDZ 2tCLK -70 ns at 12MHz 8CLK -150 19 ALE Low to Valid Data In at 16MHz tALLVD 8tCLK -90 ns at 12MHz 9tCLK -165 20 Valid Address to Valid Data In at 16MHz tAVDV 9tCLK -105 ns 21 ALE Low to RD or WR Low tALLRDL 3tCLK -50 3tCLK +50 ns 22 Address Valid to RD or WR Low tAVRDL 4tCLK -130 ns 23 Data Valid to WR Going Low tDVWRL tCLK -60 ns at 12MHz 7tCLK -150 24 Data Valid to WR High at 16MHz tDVWRH 7tCLK -90 ns 25 Data Valid after WR High tWRHDV tCLK -50 ns 26 RD Low to Address Float tRDLAZ 0 ns 27 RD or WR High to ALE High tRDHALH tCLK -40 tCLK +50 ns |
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