Programmable Timer/counter -

The LM2240 Programmable Timer Counter is a monolithic controller capable of both monostable and astable opera- tion. Monostable operation allows accurate microsecond to five day time delays. Long delays, up to three years, CAN easily be generated by cascading two Timers The Timer con- sists of a time-base Oscillator programmable 8-bit Counter and control Flip-Flop An external resistor-capacitor (RC) net- work sets the Oscillator frequency and allows delay times from 1 RC to 255 RC to be selected. In the astable mode of operation, a single RC network sets the base frequency. The frequencies of the squarewaves at the 8 outputs are each at different factors of 2 from the base frequency. If 2 or more of the outputs are shorted together, various pulse pat- terns CAN be generated. These frequencies or pulse pat- terns CAN also easily be synchronized to an external signal. The trigger, reset and outputs are all TTL and CMOS com- patible for easy Interface with digital systems. The Timers high accuracy and versatility in producing a wide range of time delays makes it ideal as a direct replacement for me- chanical or electromechanical devices. By National Semiconductor Corporation
LM2240 's PackagesLM2240 's pdf datasheet

LM2240 Pinout, Pinouts
LM2240 pinout,Pin out
This is one package pinout of LM2240,If you need more pinouts please download LM2240's pdf datasheet.

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