LMC6772_15 Datasheet, PDF (14/25 Pages) Texas Instruments – Dual Micropower Rail-To-Rail Input CMOS Comparator with Open Drain Output

LMC6772
SNOS749F – SEPTEMBER 1995 – REVISED MARCH 2013
TYPICAL APPLICATIONS
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UNIVERSAL LOGIC LEVEL SHIFTER
The output of the LMC6772 is the uncommitted drain of the output NMOS transistor. Many drains can be tied
together to provide an output OR'ing function. An output pullup resistor can be connected to any available power
supply voltage within the permitted power supply range.
Figure 32. Universal Logic Level Shifter
The two 1 kΩ resistors bias the input to half of the power supply voltage. The pull-up resistor should go to the
output logic supply. Due to its wide operating range, the LMC6772 is ideal for the logic level shifting applications.
ONE-SHOT MULTIVIBRATOR
Figure 33. One-Shot Multivibrator
A monostable multivibrator has one stable state in which it can remain indefinitely. It can be triggered externally
to another quasi-stable state. A monostable multivibrator can thus be used to generate a pulse of desired width.
The desired pulse width is set by adjusting the values of C₂ and R₄. The resistor divider of R₁ and R₂ can be
used to determine the magnitude of the input trigger pulse. The LMC6772 will change state when V₁ < V₂. Diode
D₂ provides a rapid discharge path for capacitor C₂ to reset at the end of the pulse. The diode also prevents the
non-inverting input from being driven below ground.
BI-STABLE MULTIVIBRATOR
Figure 34. Bi-Stable Multivibrator
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