Datasheet

DS1743/DS1743P Y2K-Compliant, Nonvolatile Timekeeping RAMs
14 of 17
POWER-UP/DOWN 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
IH
, CE2 at V
IL
, 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 6, 7
POWER-UP/DOWN TIMING (5V DEVICE)