DS1501W+ Maxim Integrated Products, DS1501W+ Datasheet - Page 8

• Manufacturer Part Number: DS1501W+
• Description: IC RTC WDOG Y2KC 3.3V 28-DIP
• Manufacturer: Maxim Integrated Products
• Type: Clock/Calendar/WDT/NVSRAM/Y2Kr

Specifications of DS1501W+

• Memory Size: 2K (256 x 8)
• Time Format: HH:MM:SS (24 hr)
• Date Format: YY-MM-DD-dd
• Interface: Parallel
• Voltage - Supply: 3 V ~ 3.6 V
• Operating Temperature: 0°C ~ 70°C
• Mounting Type: Through Hole
• Package / Case: 28-DIP (0.600", 15.24mm)
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

WAKEUP/KICKSTART TIMING
(T
Note: Time intervals shown above are referenced in Wakeup/Kickstart.
Figure 7. Wakeup/Kickstart Timing Diagram
Note 1: Limits at -40°C are not production tested and are guaranteed by design.
Note 2: RTC modules can be successfully processed through conventional wave-soldering techniques as long as temperature exposure to the
Note 3: Voltage referenced to ground.
Note 4: Outputs are open.
Note 5: The IRQ , PWR , and RST outputs are open drain.
Note 6: If V
Note 7: V
Note 8: These parameters are sampled with a 5pF load and are not 100% tested.
Note 9: t
Note 10: If the oscillator is not enabled, the startup time of the oscillator after V
Note 11: Typical values are at +25°C, nominal (active) supply, unless otherwise noted.
Kickstart-Input Pulse Width
Wakeup/Kickstart Power-On Timeout
A
= +25°C) (Figure 7)
lithium energy source contained within does not exceed +85°C. Post-sold cleaning with water-washing techniques is acceptable,
provided that ultrasonic vibration is not used to prevent damage to the crystal.
is greater than V
of V
DR
C O N D IT IO N :
C O N D IT IO N :
BAT
V
V
(IN T E R N A L)
P F
P F
____
P W R
____
IR Q
T D F /K S F
is the amount of time that the internal battery can power the internal oscillator and internal registers of the DS1511.
PF
___
K S
BAT
or V
<
>
is less than V
V
V
V
V
B A T
B A T
or V
H I-Z
H I-Z
C C
BAUX
C C
V
V
V
V
V
V
IH
IH
IH
IL
IL
IL
PARAMETER
t K S P W
IN T E R V A L S
BAUX
V
V
0V
V
V
0V
current. Using a 32,768Hz crystal connected to X1 and X2.
B A T
P F
P F
B A T
.
BAT
BAT
and V
and V
BAUX
BAUX
, the device power is switched from V
t P O T O
1
, the device power is switched from V
2
SYMBOL
t
t
KSPW
POTO
8 of 22
CONDITIONS
(Note 10)
CC
CC
DS1501/DS1511 Y2KC Watchdog Real-Time Clocks
to the greater of V
CC1
to the greater of V
is applied will be added to the wakeup/kickstart timeout.
3
BAT
MIN
BAT
2
2
or V
or V
BAUX
BAUX
4
when V
when V
TYP
CC
CC
drops below the greater
drops below V
5
MAX
UNITS
PF
μs
. If V
s
PF