For DS2715, in the typical circuit, when the input voltage (9VDC) is cut off, the voltage from the battery is applied to the VBATT. The maximum rating of VBATT is specified as "-0.3V to VCbias", so does this exceed the maximum rating.

Question

For DS2715, in the typical circuit, when the input voltage (9VDC) is cut off, the voltage from the battery is applied to the VBATT. The maximum rating of VBATT is specified as "-0.3V to VCbias", so does this exceed the maximum rating.

Accepted Answer

The battery voltage will still power the IC through a diode drop if the charge source is not connected. Cbias will have a voltage output. The IC will go to SUSPEND mode and reset the state machine when the charge source is disconnected.

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For DS2715, in the typical circuit, when the input voltage (9VDC) is cut off, the voltage from the battery is applied to the VBATT. The maximum rating of VBATT is specified as "-0.3V to VCbias", so does this exceed the maximum rating.