Datasheet

DS1743/DS1743P Y2K-Compliant, Nonvolatile Timekeeping RAMs
15 of 17
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
IH
, 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 6, 7
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
7 pF
Capacitance on All Output Pins C
O
10 pF