DS1554 Maxim, DS1554 Datasheet - Page 15

• 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—5V
(V
Figure 8. Power-Up/Down Waveform Timing (5V Device )
Power-Down
V
V
V
V
Expected Data-Retention Time
(Oscillator On)
CE
CC
CC
CC
CC
PF
or
= 5.0V 10%, T
to
Fall Time: V
Fall Time: V
Rise Time: V
WE
RST
PARAMETER
at V
High
IH
, Before
PF(MAX)
PF(MIN)
PF(MIN)
A
to V
= Over the operating range.)
to V
to V
SO
PF(MAX)
PF(MIN)
SYMBOL
t
t
t
t
REC
t
t
DR
PD
FB
R
F
DS1554 256k, Nonvolatile, Y2K-Compliant Timekeeping RAM
15 of 18
(Notes 6, 7)
CONDITIONS
MIN
300
10
40
10
0
0
TYP
MAX
200
UNITS
years
ms
s
s
s
s