DS1486 Datasheet, PDF (12/17 Pages) Dallas Semiconductor – RAMified Watchdog Timekeeper

POWER-DOWN/POWER-UP TIMING
DS1486/DS1486P
AC ELECTRICAL CHARACTERISTICS
POWER-UP POWER-DOWN TIMING
PARAMETER
SYMBOL
CE High to Power-Fail
t_PF
Recovery at Power-Up
V_CC Slew Rate
Power-Down
V_CC Slew Rate
Power-Down
V_CC Slew Rate Power-Up
Expected Data Retention
t_REC
t_F
4.0£V_CC£4.5V
t_FB
3.0£V_CC£4.25V
t_R
4.5V³V_CC³4.0V
t_DR
MIN
300
10
0
10
MAX
0
200
(0°C to 70°C)
UNITS NOTES
ns
ms
ms
ms
ms
years
9
WARNING:
Under no circumstances are negative undershoots, of any amplitude, allowed when device is in battery
backup mode.
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