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DS5001FP Datasheet(PDF) 13 Page - Dallas Semiconductor |
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DS5001FP Datasheet(HTML) 13 Page - Dallas Semiconductor |
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13 / 26 page ![]() DS5001FP 13 of 26 AC CHARACTERISTICS EXPANDED BUS MODE TIMING SPECIFICATIONS (TA = 0°C to +70°C; VCC = 5V ±10%) # 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 5 ALE Low to Valid Instruction In at 12MHz at 16MHz tALLVI 4tCLK - 150 4tCLK - 90 ns ns 6 ALE Low to PSEN Low tALLPSL tCLK - 25 ns 7 PSEN Pulse Width tPSPW 3tCLK - 35 ns 8 PSEN Low to Valid Instruction In at 12MHz at 16MHz tPSLVI 3tCLK - 150 3tCLK - 90 ns ns 9 Input Instruction Hold After PSEN Going High tPSIV 0ns 10 Input Instruction Float After PSEN Going High tPSIX tCLK - 20 ns 11 Address Hold After PSEN Going High tPSAV tCLK - 8 ns 12 Address Valid to Valid Instruction In at 12MHz at 16MHz tAVVI 5tCLK - 150 5tCLK - 90 ns ns 13 PSEN Low to Address Float tPSLAZ 0ns 14 RD Pulse Width tRDPW 6tCLK - 100 ns 15 WR Pulse Width tWRPW 6tCLK - 100 ns 16 RD Low to Valid Data In at 12MHz at 16MHz tRDLDV 5tCLK - 165 5tCLK - 105 ns ns 17 Data Hold After RD High tRDHDV 0ns 18 Data Float After RD High tRDHDZ 2tCLK - 70 ns 19 ALE Low to Valid Data In at 12MHz at 16MHz tALLVD 8tCLK - 150 8tCLK - 90 ns 20 Valid Address to Valid Data In at 12MHz at 16MHz tAVDV 9tCLK - 165 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 24 Data Valid to WR High at 12MHz at 16MHz tDVWRH 7tCLK - 150 7tCLK - 90 ns 25 Data Valid After WR High tWRHDV tCLK - 50 ns 26 RD Low to Address Float tRDLAZ 0ns 27 RD or WR High to ALE High tRDHALH tCLK - 40 tCLK + 50 ns |
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