DS1501/DS1511 Y2KC Watchdog Real-Time Clocks

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WAKEUP/KICKSTART TIMING

PARAMETER

SYMBOL

CONDITIONS

MIN

TYP

MAX

UNITS

Kickstart-Input Pulse Width

2

µs

Wakeup/Kickstart Power-On Timeout

(Note 10)

2

s

Note: Time intervals shown above are referenced in Wakeup/Kickstart.

Figure 7. Wakeup/Kickstart Timing Diagram

tKS PW

tPO T O

CO NDITIO N :

<

0V

0V

CO NDITIO N :

T D F/KSF

(INTE RNA L)

HI-Z

____

IR Q

HI-Z

____

PW R

___

KS

1

2

3

4

5

IN T E R V A L S

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:

Note 6:

Note 7:

Note 8:

These parameters are sampled with a 5pF load and are not 100% tested.

Note 9:

Note 10:

Note 11:

Typical values are at +25°C, nominal (active) supply, unless otherwise noted.