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

ms

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

tKSPW

tPO T O

C O N D IT IO N :

<

0V

0V

C O N D IT IO N :

T D F /KSF

(IN T E R N A 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: The

IRQ, PWR, and RST outputs are open drain.

Note 8: These parameters are sampled with a 5pF load and are not 100% tested.

Note 11: Typical values are at +25°C, nominal (active) supply, unless otherwise noted.