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DS2251T Datasheet(PDF) 13 Page - Dallas Semiconductor |
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DS2251T Datasheet(HTML) 13 Page - Dallas Semiconductor |
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13 / 20 page ![]() DS2251T 13 of 20 AC CHARACTERISTICS (cont'd) EXTERNAL CLOCK DRIVE (tA=0˚C to70˚C; VCC=5V ± 10%) # PARAMETER SYMBOL MIN MAX UNITS 28 External Clock High Time @ 12 MHz @ 16 MHz tCLKHPW 20 15 ns ns 29 External Clock Low Time @ 12 MHz @ 16 MHz tCLKLPW 20 15 ns ns 30 External Clock Rise Time @ 12 MHz @ 16 MHz tCLKR 20 15 ns ns 31 External Clock Fall Time @ 12 MHz @ 16 MHz tCLKF 20 15 ns ns EXTERNAL CLOCK TIMING AC CHARACTERISTICS (cont'd) POWER CYCLING TIMING (tA=0˚C to70˚C; VCC=5V ± 10%) # PARAMETER SYMBOL MIN MAX UNITS 32 Slew Rate from VCCMIN to 3.3V tF 130 µs 33 Crystal Startup Time tCSU (note 6) 34 Power-On Reset Delay tPOR 21504 tCLK |
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