LMV331M5X/NOPB National Semiconductor, LMV331M5X/NOPB Datasheet - Page 11

• Manufacturer Part Number: LMV331M5X/NOPB
• Description: IC COMPARATOR TINY LV SOT23-5
• Manufacturer: National Semiconductor
• Type: General Purposer

Specifications of LMV331M5X/NOPB

• Number Of Elements: 1
• Output Type: CMOS, Open-Collector, TTL
• Voltage - Supply: 2.7 V ~ 5.5 V
• Mounting Type: Surface Mount
• Package / Case: SC-74A, SOT-753
• Leaded Process Compatible: Yes
• Rohs Compliant: Yes
• Peak Reflow Compatible (260 C): Yes
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: LMV331M5X; LMV331M5XTR

NEGATIVE PEAK DETECTOR
For the negative detector, the output transistor of the com-
parator acts as a low impedance current sink. The only dis-
charge path will be the 1 MΩ resistor and any load impedance
used. Decay time is changed by varying the 1 MΩ resistor
DRIVING CMOS AND TTL
The comparator's output is capable of driving CMOS and TTL
Logic circuits.
FIGURE 9. Negative Peak Detector
FIGURE 8. Positive Peak Detector
FIGURE 10. Driving CMOS
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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 recommend-
ed to improve the voltage margin when all but one of the
inputs are high.
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
A logic "1" at any of the inputs will produce a logic "1" at the
output.
FIGURE 11. Driving TTL
FIGURE 12. AND Gate
cc
, thereby reducing the reference voltage.
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