Shutdown Schemes for MAX1044/ICL7660

This is a Shutdown Schemes of MAX1044/ICL7660. Additional capacitive loading on the OSC pin of the device will reduce the oscillator frequency, so we should be aware when using the circuit. Compared with other circuits, the first circuit has the least loading on the OSC pin. Using a high or low logic level this circuit has the added advantage of controlling shutdown, depending on the orientation of the switching diode. Here is the circuit:

[Source: MAXIM Application Note]