The device is actuated by a positive going pulse to pin 11.
The pulse starts the oscillator and sets pins 1 to 8 (dividers output) to the low state.

A binary counting sequence commences on the output pins 1-8.
The pins can be connected to give a wired AND.
All the joined pins must go high to give an output.
If any one of the pins is low then the output is low.
This can also be used to reset the timer (by taking pin 10 high)at a particular count.

The internal oscillator period is given by t = CR seconds where C is in Farads and R is in Ohms.

Using switches at the outputs enables timing to be quickly set.

The switches have the following weightings

Sw1  Sw2   Sw3  Sw4  Sw5  Sw6  Sw7  Sw8
  1      2        4       8       16     32     64     128

If switches 1, 4, 8 are operated, then the divisor is 1+8+128=137.
If the oscillator period is 1 second then the output will be high for 137 seconds.

When the output goes high at the end of the timing period, it can be applied to the reset pin(10) to complete the sequence.
Taking pin 10 high at any time aborts the sequence.

The 2240 can operate from a supply in the range 4-15volts.
Current consumption is typically 15 mA.

The timer can provide accurate delays from 10 uS to over 10 hours.

Recommended ranges for the timing componnts are

C  10 nF to 1000 uF
R  1k     to  10M

The 2240 can be configured as an astable by taking reset to 0 V.

It can also be made to operate as a complex waveform generator.