Position: Index > Unclassified >


2017-08-19 08:02  
Declaration:We aim to transmit more information by carrying articles . We will delete it soon, if we are involved in the problems of article content ,copyright or other problems.

When used as a stand-alone device, ZN1034E from Ferranti can provide timed intervals ranging from 1 second to 19 days, although the rc time constant is only 220 seconds. The ZN1034E includes an internal voltage regulator, an oscillator, and a 12-stage binary counter. The total delay time provided by the counter is 4095 times the oscillator period. The control logic times-out after 4095 cyCles of the oscillator, and delivers high and low output pulses at pins 2 and 3.

The output at pin 3 is normally high and decreases at the end of the timed interval. The complementary output at pin 2 is normally low and becomes high at tbe end of the timed interval. The timing period is initiated by momentarily grounding pin 1. Timing resistor R 7 consists of two resistors, R1 and R2, in series. Because R1 has a fixed value of 100 KO, the total range of R7 is 100 K to 1.1 MO.

Reprinted Url Of This Article: