Datasheet

DS1746/DS1746P Y2K-Compliant, Nonvolatile Timekeeping RAMs
13 of 16
POWER-UP/DOWN AC CHARACTERISTICS—5V
(V
CC
= 5.0V ±10%, T
A
= Over the Operating Range.)
PARAMETER
SYMBOL
MIN
TYP
MAX
UNITS
NOTES
CE
or
WE
at V
H
Before Power-Down
t
PD
0
µs
V
CC
Fall Time: V
PF(MAX)
to
V
PF(MIN)
t
F
300
µs
V
CC
Fall Time: V
PF(MIN)
to V
SO
t
FB
10
µs
V
CC
Rise Time: V
PF(MIN)
to
V
PF(MAX)
t
R
0
µs
Power-Up Recover Time t
REC
35 ms
Expected Data-Retention Time
(Oscillator ON)
t
DR
10 years 5, 6
POWER-UP/DOWN TIMING (5V DEVICE)