DS1501-DS1511 DALLAS [Dallas Semiconductor], DS1501-DS1511 Datasheet - Page 8

• Manufacturer Part Number: DS1501-DS1511
• Description: Y2K-Compliant Watchdog Real-Time Clocks
• Manufacturer: DALLAS [Dallas Semiconductor]

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 :
V
BAT
V
(IN T E R N A L )
P F
P F
_ ___
P W R
_ ___
IR Q
T D F /K S F
PF
is the amount of time that the internal battery can power the internal oscillator and internal registers of the DS1511.
___
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
C C
BAUX
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
0V
V
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 20
CONDITIONS
(Note 10)
CC
CC
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
ms
. If V
s
PF