LMV331M7 National Semiconductor, LMV331M7 Datasheet - Page 10
![Voltage Comparator IC](/photos/18/97/189782/3833572_sml.gif)
LMV331M7
Manufacturer Part Number
LMV331M7
Description
Voltage Comparator IC
Manufacturer
National Semiconductor
Specifications of LMV331M7
No. Of Comparators
1
No. Of Pins
5
Peak Reflow Compatible (260 C)
No
Output Type
TTL/CMOS
No. Of Circuits
1
Leaded Process Compatible
No
Package / Case
5-SC70
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant
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Part Number
Manufacturer
Quantity
Price
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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 ref-
erence 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)
DS100080-5
DS100080-6
10
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
outputs goes low, the output V
FIGURE 12. AND Gate
FIGURE 13. OR Gate
cc
cc
, thereby reducing the reference volt-
. If one or more of the comparators
o
will go low.
DS100080-11
DS100080-10