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DS28EC20 Datasheet(PDF) 4 Page - Maxim Integrated Products |
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DS28EC20 Datasheet(HTML) 4 Page - Maxim Integrated Products |
4 / 27 page DS28EC20: 20Kb 1-Wire EEPROM 4 of 27 3.3V SUPPLY ELECTRICAL CHARACTERISTICS (TA = 0°C to +70°C, VPUP = 3.3V ± 5%) PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS I/O PIN GENERAL DATA 1-Wire Pullup Resistance RPUP (Notes 1, 2) 0.3 2.2 k Ω Input Capacitance CIO (Notes 3, 4) 1000 pF Input Load Current IL I/O pin at VPUP 0.05 6.7 10 µA High-to-Low Switching Threshold VTL (Notes 4, 5, 6) 0.49 VPUP - 1.9 V Input Low Voltage VIL (Notes 1, 7) 0.5 V Low-to-High Switching Threshold VTH (Notes 4, 5, 8) 1.09 VPUP - 1.1 V Switching Hysteresis VHY (Notes 4, 5, 9) 0.33 0.70 V Output Low Voltage VOL At 4mA (Note 10) 0.30 V Recovery Time tREC Standard speed (Notes 1, 11) 5 µs Rising-Edge Hold-off Time tREH Standard speed (Notes 4, 12) 0.5 5.0 µs Timeslot Duration tSLOT Standard speed (Notes 1, 13) 65 µs I/O PIN, 1-Wire RESET, PRESENCE DETECT CYCLE Reset-Low Time tRSTL Standard speed (Note 1) 480 640 µs Presence-Detect High Time tPDH Standard speed 15 60 µs Presence-Detect Low Time tPDL Standard speed 60 240 µs Presence-Detect Sample Time tMSP Standard speed (Notes 1, 14) 60 75 µs I/O PIN, 1-Wire WRITE Write-0 Low Time tW0L Standard speed (Notes 1, 15) 60 120 µs Write-1 Low Time tW1L Standard speed (Notes 1, 15) 1 15 µs I/O PIN, 1-Wire READ Read-Low Time tRL Standard speed (Notes 1, 16) 5 15 - δ µs Read-Sample Time tMSR Standard speed (Notes 1, 16) tRL + δ 15 µs EEPROM Programming Current IPROG (Note 17) 0.8 mA Programming Time tPROG (Note 18) 10 ms At +25°C 200k Write/Erase Cycles (Endu- rance) (Notes 19, 20) NCY At +70°C 50k ⎯ Data Retention tDR (Notes 21, 22, 23) 40 years |
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