UA2240

JLA2240 PROGRAMMABLE TIMER/COUNTER FAIRCHILD LINEAR INTEGRATED CIRCUITS GENERAL DESCRIPTION - The /lA2240 Programmable Timer/Counter is a monolithic controller capable of producing accurate microsecond to five day time delays. Long delays, up to three years, can easily be generated by cascading two timers. The timer consists of a time-t>ase oscillator, programmable 8-bit counter and control flip-flop. An external resistor capacitor (RC) network sets the oscillator frequency and allows delay times from 1 RC to 255 RC to be selected. In the astable mode of operation, 255 frequencies or pulse patterns can be generated from a single RC network. These frequencies or pulse patterns can also easily be synchronized to an external signal. The trigger, reset and outputs are all TIL and DTL compatible for easy interface with digital system. The timer's high accuracy and versatility in producing a wide range of time delays makes it ideal as a direct replacement for mechanical or electromechanical...