pcf8563 Current Drain

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I'm using the PCF8563T to interrupt a cpu every 24 hrs. Vdd is 3.3v and I'm using a 32.768 kHz external crystal which is sufficiently accurate for my app with no compensation. The configuration works as expected with no problems. The issue I have is that with no I2C or interrupt activity and no clock outputs, the chip is drawing about 1.6ma while internally maintaining the time. Is this normal or am I overlooking something in the configuration setup to achieve lower current drain?

Thanks for any assistance with this.

Frank

[guoweisun · Accepted solution]

This's  impossible, how many boards did you test? same result?

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I was unable to try another meter over the weekend, but today I used a different meter and the current draw was about 300nA. Sorry for the oversight and thank you for responding.

Frank

[guoweisun]

Can you share with your schematic?

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Thanks for responding.

I misstated the current draw in my original post. 1.6 ma is the current draw from a 12v to 3.3v dc-dc converter. The current draw, as noted in the schematic, is 5.1 ma. I have tried configurations with no interrupt and with I2C connections removed after configuring the RTC, but the high current drain remains.