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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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DS1923 датащи(PDF) 2 Page - Dallas Semiconductor |
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DS1923 датащи(HTML) 2 Page - Dallas Semiconductor |
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2 / 52 page  DS1923: Hygrochron Temperature/Humidity Logger iButton with 8kB Data log Memory 2 of 52 DS1923 ABSOLUTE MAXIMUM RATINGS IO Voltage to GND -0.3V, +6V IO Sink current 20mA Operating Temperature and Humidity Range -20°C to +85°C, 0%RH to 100%RH (See Safe Operating Range Chart) Storage Temperature and Humidity Range -40°C to +85°C, 0%RH to 100%RH (See Safe Operating Range Chart) This is a stress rating only and functional operation of the device at these or any other conditions above those indicated in the operation sections of this specification is not implied. Exposure to absolute maximum rating conditions for extended periods of time may affect reliability. DS1923 ELECTRICAL CHARACTERISTICS (VPUP = 3.0V to 5.25V, TA = -20°C to +85°C) PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS IO Pin General Data 1-Wire Pullup Resistance RPUP (Notes 1, 2) 2.2 k W Input Capacitance CIO (Note 3) 100 800 pF Input Load Current IL IO pin at VPUP 6 10 µA High-to-Low Switching Threshold VTL (Notes 4. 5) 0.4 3.2 V Input Low Voltage VIL (Notes 1, 6) 0.3 V Low-to-High Switching Threshold VTH (Notes 4, 7) 0.7 3.4 V Switching Hysteresis VHY (Note 8) 0.09 N/A V Output Low Voltage VOL At 4mA (Note 9) 0.4 V Standard speed, RPUP = 2.2k W 5 Overdrive speed, RPUP = 2.2k W 2 Recovery Time (Note 1) tREC Overdrive speed, directly prior to reset pulse; RPUP = 2.2k W 5 µs Rising-Edge Hold-off Time tREH (Note 10) 0.6 2.0 µs Standard speed 65 Overdrive speed, VPUP > 4.5V 8 Timeslot Duration (Note 1) tSLOT Overdrive speed (Note 11) 9.5 µs IO Pin, 1-Wire Reset, Presence Detect Cycle Standard speed, VPUP > 4.5V 480 720 Standard speed (Note 11) 690 720 Overdrive speed, VPUP > 4.5V 48 80 Reset Low Time (Note 1) tRSTL Overdrive speed (Note 11) 70 80 µs Standard speed, VPUP > 4.5V 15 60 Standard speed (Note 11) 15 63.5 Presence-Detect High Time tPDH Overdrive speed (Note 11) 2 7 µs Standard speed, VPUP > 4.5V 1.5 5 Standard speed 1.5 8 Presence-Detect Fall Time (Note 12) tFPD Overdrive speed 0.15 1 µs Standard speed, VPUP > 4.5V 60 240 Standard speed (Note 11) 60 287 Overdrive speed, VPUP > 4.5V (Note 11) 7 24 Presence-Detect Low Time tPDL Overdrive speed (Note 11) 7 28 µs Standard speed, VPUP > 4.5V 65 75 Standard speed 71.5 75 Presence-Detect Sample Time (Note 1) tMSP Overdrive speed 8 9 µs |
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