Precision_programmable_timers_using_the_Intersil_8240_8250_16_pin_DIP

Published:2009/7/21 22:29:00 Author:Jessie | From:SeekIC

Precision programmable timers using the Intersil 8240/8250 16-pin DIP. The timer is used in the monostable mode. The output is normally high and goes low to trigger an input. Components R and C at pin 13 determine the time cycle. The timing duration, TO is equal to NBC, where R and C are component values and N is a number between 1 and 255. Integer N is determined by the combination of pins 1 through 8 connected to the output bus. The 8250 can be programmed for numbers between 1 and 99. The numbers shown on the schematic adjacent to pin 1 through 8 are the respective N integers, with the upper ones for the 8240 and the lower ones for the 8250 (courtesy Intersil, Inc.).



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