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DS1284Q/T Datasheet(PDF) 13 Page - Dallas Semiconductor

Part # DS1284Q/T
Description  Watchdog Timekeepers
PDF  18 Pages
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Manufacturer  DALLAS [Dallas Semiconductor]
Direct Link  https://www.maximintegrated.com/en.html
Logo DALLAS - Dallas Semiconductor

DS1284Q/T Datasheet(HTML) 13 Page - Dallas Semiconductor

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DS1284/DS1286
13 of 18
POWER-UP/POWER-DOWN CONDITION
PARAMETER
SYMBOL
MIN
TYP
MAX
UNITS NOTES
CE at VIH before Power-Down
tPD
0
µs
VCC Slew from 4.5V to 0V (CE at VIH)
tF
350
µs
VCC Slew from 0V to 4.5V (CE at VIH)
tR
100
µs
CE at VIH after Power-Up
tREC
150
ns
POWER-DOWN/POWER-UP CONDITION
(TA = +25°C)
PARAMETER
SYMBOL
MIN
TYP
MAX
UNITS NOTES
Expected Data-Retention Time
(DS1286)
tDR
10
years
9
WARNING: Under no circumstances are negative undershoots, of any amplitude, allowed
when device is in battery-backup mode.



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