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TPL5010: TPL5010 Time interval issue

Part Number: TPL5010
We are using TPL5010DDCT for the watchdog functionality. In this, we have connected R external resistance 24K to pin 3 of TPL5010 IC. So, configured time interval (tIP) should be 74Sec. We expect to reset the microcontroller periodically after every 74 seconds if the DONE signal is not applied. However, we have observed that our microcontroller is resetting periodically double of configured time i.e. 148sec ( 2mins and 28 sec). Would you please explain the timing interval setting? Why we are getting a reset with a time interval double of the configured time through R external resistance?
1.DONE signal of watchdog IC TPL5010 is connected to the microcontroller GPIO
2. WAKE signal of watchdog IC TPL5010 is not connected, it is in N.C condition
3. The RSTn of watchdog IC TPL5010 is connected to microcontroller reset pin