DS1557 Maxim, DS1557 Datasheet - Page 14

• Manufacturer Part Number: DS1557
• Description: The DS1557 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 512k x 8 nonvolatile static RAM
• Manufacturer: Maxim

POWER-UP/DOWN CHARACTERISTICS—5V
(V
Figure 8. Power-Up/Down Waveform Timing—5V Device
CE or WE at V
Power-Down
V
V
V
V
Expected Data-Retention Time
(Oscillator On)
CC
CC
CC
CC
PF
= 5.0V ±10%, T
to RST High
Fall Time: V
Fall Time: V
Rise Time: V
PARAMETER
IH
, Before
PF(MAX)
PF(MIN)
PF(MIN)
A
= Over the Operating Range.)
to V
to V
to V
SO
PF(MAX)
PF(MIN)
SYMBOL
t
t
t
t
REC
t
t
PD
DR
FB
R
F
14 of 17
(Note 6)
CONDITIONS
MIN
300
10
40
10
0
0
TYP
MAX
200
UNITS
years
ms
s
s
s
s