LMC6772 datasheet(16/25 Pages) TI

Part #	LMC6772

Description	Dual Micropower Rail-To-Rail Input CMOS Comparator with Open Drain Output

PDF	25 Pages

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Manufacturer	TI [Texas Instruments]

Direct Link	http://www.ti.com

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16 / 25 page

LMC6772

SNOS749F – SEPTEMBER 1995 – REVISED MARCH 2013

www.ti.com

Figure 37. Time Delay Generator

The circuit shown above provides output signals at a prescribed time interval from a time reference and

automatically resets the output when the input returns to ground. Consider the case of VIN = 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 exponentially through R.

This is indicated above. The output voltages of comparators 1, 2, and 3 swtich to the high state when VC1 rises

above the reference voltages VA, VB 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.

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LMC6772 Datasheet(PDF) 16 Page - Texas Instruments