DS1554 Maxim, DS1554 Datasheet - Page 16

• Manufacturer Part Number: DS1554
• Description: The DS1554 is a full-function, year 2000-compliant (Y2KC), real-time clock/calendar (RTC) with an RTC alarm, watchdog timer, power-on reset, battery monitor, and 32k x 8 nonvolatile static RAM
• Manufacturer: Maxim

POWER-UP/DOWN CHARACTERISTICS—3.3V
(V
Figure 9. Power-Up/Down Waveform Timing (3.3V Device)
CAPACITANCE
(T
Power-Down
V
V
V
Expected Data-Retention Time
(Oscillator On)
CE
Capacitance on All Input Pins
Capacitance on IRQ/FT, RST,
and DQ Pins
A
CC
CC
CC
PF
= +25°C)
= 3.3V 10%, T
to
or
Fall Time: V
Rise Time: V
RST
WE
PARAMETER
PARAMETER
at V
High
IH
PF(MAX)
PF(MIN)
, Before
A
= Over the operating range.)
to V
to V
PF(MAX)
PF(MIN)
SYMBOL
SYMBOL
C
C
t
t
t
IN
IO
REC
t
t
DR
PD
R
F
(Note 1)
(Note 1)
(Notes 6, 7)
DS1554 256k, Nonvolatile, Y2K-Compliant Timekeeping RAM
16 of 18
CONDITIONS
CONDITIONS
MIN
MIN
300
40
10
0
0
TYP
TYP
MAX
MAX
14
10
200
UNITS
UNITS
years
ms
pF
pF
s
s
s