The timer contains an oscillator, the frequency of which is controlled by an external resistor and capacitor.

The output of this oscillator goes into a 12 stage binary counter.

The output of the counter changes after 4095 cycles of the oscillator.

The timer require a 5 volt supply and consumes 5 mA.

The timing  cycle is triggered by a negative going edge to pin 1.

Pin 3 goes high during the timing period. Pin 2 goes low.

The timing period is determined by  t = CR,
where t is in seconds, C is in Farads and R is in ohms.

The following table gives values for various timings

1 second      10 nF       39k
1 minute      100 nF      220k
5 minutes     1 uF         100k
1 hour          1 uF         1.2 M
1 day           10 uF       3.3 M
1 week         100uF      2.2 M

Use low leakage capacitors, such as tantalums, for high values of C.
Use values of C between 3.3 nF and 1000uF.
Use values of R between 5k and 5 M

The timing period can be adjusted to a more precise value by a trimming potentiometer between pins 13 and 14.

The timer can use  voltage supplies other than 5 volts if a resistor is connected between pins 4 and 5 and the supply rail, as shown in the next diagram. A decoupling capacitor is necessary.
Calculate the value of the resistor from
R = supply voltage - 5V/ load current in mA. ( the ZN1034 can supply output current up to 25 mA).

The timer can provide high power control by driving a transistor which in turn drives a relay.