LMC6772AIM NSC [National Semiconductor], LMC6772AIM Datasheet - Page 9

• Manufacturer Part Number: LMC6772AIM
• Description: Dual Micropower Rail-To-Rail Input CMOS Comparator with Open Drain Output
• Manufacturer: NSC [National Semiconductor]

Typical Applications
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
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-
IN
= 0. The output of comparator 4 is also at
(Continued)
FIGURE 9. Time Delay Generator
Time Delay Generator
9
nentially through R. This is indicated above. The output volt-
ages of comparators 1, 2, and 3 swtich to the high state
when V
A small amount of hysteresis has been provided to insure
fast switching when the RC time constant is chosen to give
long delay times.
C1
rises above the reference voltages V
DS012347-32
A
, V
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B
and V
C
.