LMC6762 datasheet(11/13 Pages) NSC

Part #	LMC6762

Description	Dual MicroPower Rail-To-Rail Input CMOS Comparator with Push-Pull Output

PDF	13 Pages

Scroll/Zoom	100%

Manufacturer	NSC [National Semiconductor (TI)]

Direct Link	http://www.national.com

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11 / 13 page

Typical Applications (Continued)

The circuit shown above provides output signals at a pre-

scribed time interval from a time reference and automatically

resets the output when the input returns to ground. Consider

the case of V

IN = 0. The output of comparator 4 is also at

ground. This implies that the outputs of comparators 1, 2,

and 3 are also at ground. When an input signal is applied,

the output of comparator 4 swings high and C charges expo-

nentially through R. This is indicated above.

The output voltages of comparators 1, 2, and 3 switch to the

high state when V

C1 rises above the reference voltage VA,

B and VC. A small amount of hysteresis has been provided

to insure fast switching when the RC time constant is chosen

to give long delay times.

DS012320-18

FIGURE 10. Time Delay Generator

LMC6762 Datasheet(PDF) 11 Page - National Semiconductor (TI)