LMC6772AIM/NOPB National Semiconductor, LMC6772AIM/NOPB Datasheet - Page 12

• Manufacturer Part Number: LMC6772AIM/NOPB
• Description: IC COMP DUAL MICRPWR CMOS 8-SOIC
• Manufacturer: National Semiconductor
• Type: General Purposer

Specifications of LMC6772AIM/NOPB

• Number Of Elements: 2
• Output Type: Open Drain
• Voltage - Supply: 2.7 V ~ 15 V, ±1.35 V ~ 7.5 V
• Mounting Type: Surface Mount
• Package / Case: 8-SOIC (0.154", 3.90mm Width)
• Comparator Type: Micropower
• No. Of Comparators: 2
• Response Time: 4µs
• Ic Output Type: CMOS, MOS, Open-Collector / Drain, TTL
• Supply Current: 25µA
• Supply Voltage Range: 2.7V To 15V
• Rohs Compliant: Yes
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: *LMC6772AIM; *LMC6772AIM/NOPB; LMC6772AIM

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OSCILLATOR
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 out-
put of comparator 4 swings high and C charges exponentially
FIGURE 8. Square Wave Generator
IN
= 0. The output of comparator 4 is also at
Time Delay Generator
FIGURE 9. Time Delay Generator
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12
Figure 8
wave generator circuit. The total hysteresis of the loop is set
by R
discharge paths for the capacitor C. The charge path is set
through R
RC time constant of R
for the capacitor is set by R
the pulses can be changed by varying R
can be altered by R
changed by varying both R
through R. This is indicated above. The output voltages of
comparators 1, 2, and 3 swtich to the high state when V
rises above the reference voltages V
amount of hysteresis has been provided to insure fast switch-
ing when the RC time constant is chosen to give long delay
times.
1
, R
2
shows the application of the LMC6772 in a square
4
and R
and D
3
1
. R
. So, the pulse width t
4
4
. The frequency of the output can be
4
and R
and C. Similarly, the discharge path
5
4
and D
and R
5
provide separate charge and
2
. Thus, the time t
5
.
A
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1
, V
5
, and the pulse width
is determined by the
B
and V
C
2
. A small
between
C1