Datasheet

DS1746/DS1746P Y2K-Compliant, Nonvolatile Timekeeping RAMs
14 of 16
POWER-UP/DOWN CHARACTERISTICS—3.3V
(V
CC
= 3.3V ±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
Rise Time: V
PF(MIN)
to
V
PF(MAX)
t
R
0
µs
V
PF
to
RST
High
t
REC
35 ms
Expected Data-Retention Time
(Oscillator ON)
t
DR
10 years 5, 6
POWER-UP/DOWN WAVEFORM TIMING (3.3V DEVICE)
CAPACITANCE
(T
A
= +25°C)
PARAMETER
SYMBOL
MIN
TYP
MAX
UNITS
NOTES
Capacitance on All Input Pins
C
IN
14
pF
Capacitance on All Output Pins
C
O
10
pF