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DS2250T-64-16 Datasheet(PDF) 11 Page - Dallas Semiconductor |
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DS2250T-64-16 Datasheet(HTML) 11 Page - Dallas Semiconductor |
11 / 19 page DS2250(T) 121395 11/19 AC CHARACTERISTICS EXPANDED BUS MODE TIMING SPECIFICATIONS (tA = 0°C to70°C; VCC = 5V + 5%) # PARAMETER SYMBOL MIN MAX UNITS 1 Oscillator Frequency 1/tCLK 1.0 16 (–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 Instr. In @12 MHz @16 MHz tALLVI 4tCLK –150 4tCLK–90 ns 6 ALE Low to PSEN Low tALLPSL tCLK –25 ns 7 PSEN Pulse Width tPSPW 3tCLK –35 ns 8 PSEN Low to Valid Instr. In @12 MHz @16 MHz tPSLVI 3tCLK –150 3tCLK –90 ns ns 9 Input Instr. Hold after PSEN Going High tPSIV 0 ns 10 Input Instr. 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 Instr. In @12 MHz @16 MHz tAVVI 5tCLK –150 5tCLK –90 ns 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 16 RD Low to Valid Data In @12 MHz @16 MHz tRDLDV 5tCLK –165 5tCLK –105 ns ns 17 Data Hold after RD High tRDHDV 0 ns 18 Data Float after RD High tRDHDZ 2tCLK –70 ns 19 ALE Low to Valid Data In @12 MHz @16 MHz tALLVD 8CLK –150 8tCLK –90 ns ns 20 Valid Addr. to Valid Data In @12 MHz @16 MHz tAVDV 9tCLK –165 9tCLK –105 ns 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 @12 MHz @16 MHz tDVWRH 7tCLK –150 7tCLK –90 ns 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 |
Similar Part No. - DS2250T-64-16 |
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Similar Description - DS2250T-64-16 |
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