LMV331M7X National Semiconductor, LMV331M7X Datasheet - Page 11

• Manufacturer Part Number: LMV331M7X
• Description: IC,VOLT COMPARATOR,SINGLE,BICMOS,TSSOP,5PIN,PLASTIC
• Manufacturer: National Semiconductor

Specifications of LMV331M7X

• Rohs Compliant: NO

Application Circuits
Driving CMOS and TTL
The comparator’s output is capable of driving CMOS and
TTL Logic circuits.
AND Gates
The comparator can be used as three input AND gate. The
operation of the gate is as follow:
The resistor divider at the inverting input establishes a refer-
ence voltage at that node. The non-inverting input is the sum
of the voltages at the inputs divided by the voltage dividers.
The output will go high only when all three inputs are high,
casing the voltage at the non-inverting input to go above that
at inverting input. The circuit values shown work for a 0
equal to ground and a 1 equal to 5V.
The resistor values can be altered if different logic levels are
desired. If more inputs are required, diodes are recom-
mended to improve the voltage margin when all but one of
the inputs are high.
FIGURE 10. Driving CMOS
FIGURE 11. Driving TTL
(Continued)
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OR Gates
A three input OR gate is achieved from the basic AND gate
simply by increasing the resistor value connected from the
inverting input to V
age.
A logic 1 at any of the inputs will produce a logic 1 at the
output.
ORing the Output
By the inherit nature of an open collector comparator, the
outputs of several comparators can be tied together with a
pull up resistor to V
puts goes low, the output V
FIGURE 12. AND Gate
FIGURE 13. OR Gate
cc
cc
. If one or more of the comparators out-
, thereby reducing the reference volt-
o
will go low.
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