參數(shù)資料
型號(hào)： DS1501
英文描述： Y2K-Compliant Watchdog Real-Time Clocks
中文描述： Y2K兼容、看門狗實(shí)時(shí)時(shí)鐘
文件頁(yè)數(shù)： 8/20頁(yè)
文件大?。?/td> 265K
代理商： DS1501
DS1501/DS1511 Y2KC Watchdog Real-Time Clocks
8 of 20
WAKEUP/KICKSTART TIMING
(T
A
= +25°C) (Figure 7)
PARAMETER
Kickstart-Input Pulse Width
SYMBOL
t
KSPW
t
POTO
CONDITIONS
MIN
2
TYP
MAX
UNITS
s
s
Wakeup/Kickstart Power-On Timeout
(Note 10)
2
Note:
Time intervals shown above are referenced in
Wakeup/Kickstart
.
Figure 7. Wakeup/Kickstart Timing Diagram
tKSPW
tPOTO
V
CC
CONDITION:
V
PF
<
V
BAT
V
PF
V
BAT
0V
V
BAT
V
PF
0V
V
CC
CONDITION:
V
PF
>
V
BAT
TDF/KSF
(INTERNAL)
V
IL
V
IH
HI-Z
____
IRQ
V
IL
V
IH
HI-Z
____
PW R
V
IH
V
IL
___
KS
1
2
3
4
5
INTERVALS
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
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.
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
PF
is less than V
BAT
and V
BAUX
, the device power is switched from V
CC
to the greater of V
BAT
or V
BAUX
when V
CC
drops below V
PF
. If V
PF
is greater than V
BAT
and V
BAUX
, the device power is switched from V
CC
to the greater of V
BAT
or V
BAUX
when V
CC
drops below the greater
of V
BAT
or V
BAUX
.
Note 7:
V
BAT
or V
BAUX
current. Using a 32,768Hz crystal connected to X1 and X2.
Note 8:
These parameters are sampled with a 5pF load and are not 100% tested.
Note 9:
t
DR
is the amount of time that the internal battery can power the internal oscillator and internal registers of the DS1511.
Note 10:
If the oscillator is not enabled, the startup time of the oscillator after V
CC1
is applied will be added to the wakeup/kickstart timeout.
Note 11:
Typical values are at +25°C, nominal (active) supply, unless otherwise noted.
相關(guān)PDF資料
PDF描述
DS1511 Y2K-Compliant Watchdog Real-Time Clocks
DS1501-DS1511 Y2K-Compliant Watchdog Real-Time Clocks
DS1501YSN Hook-Up Wire; Conductor Size AWG:24; No. Strands x Strand Size:7 x 32; Jacket Color:White; Approval Bodies:UL, CSA; Approval Categories:UL AWM Styles 1007, 1565; CSA Types TR-64, TRSR-64; JQA-F; Passes VW-1 Flame Test RoHS Compliant: Yes
DS1501WEN Y2K-Compliant Watchdog Real-Time Clocks
DS1501YN Y2K-Compliant Watchdog Real-Time Clocks
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