Rainbow Electronics DS1486P - Manual (Page 12)

DS1486/DS1486P
12 of 17
POWER-DOWN/POWER-UP TIMING
AC ELECTRICAL CHARACTERISTICS
POWER-UP POWER-DOWN TIMING (0
°C to 70°C)
PARAMETER SYMBOL MIN MAX UNITS NOTES
CE High to Power-Fail
t
PF
0 ns
Recovery at Power-Up t
REC
200 ms
V
CC
Slew Rate
Power-Down
t
F
4.0 £V
CC
£4.5V
300 ms
V
CC
Slew Rate
Power-Down
t
FB
3.0 £V
CC
£4.25V
10 ms
V
CC
Slew Rate Power-Up t
R
4.5V ³V
CC
³4.0V
0 ms
Expected Data Retention t
DR
10 years 9
WARNING:
Under no circumstances are negative undershoots, of any amplitude, allowed when device is in battery
backup mode.