LMV339MXNOPB - NATIONAL SEMICONDUCTOR

May 2007

LMV331 Single / LMV393 Dual / LMV339 Quad

General Purpose, Low Voltage, Tiny Pack Comparators

General Description

The LMV393 and LMV339 are low voltage (2.7-5V) versions

of the dual and quad comparators, LM393/339, which are

specified at 5-30V. The LMV331 is the single version, which

is available in space saving 5-pin SC70 and 5-pin SOT23

packages. The 5-pin SC70 is approximately half the size of

the 5-pin SOT23.

The LMV393 is available in 8-pin SOIC and MSOP. The

LMV339 is available in 14-pin SOIC and TSSOP.

The LMV331/393/339 is the most cost-effective solution

where space, low voltage, low power and price are the pri-

mary specification in circuit design for portable consumer

products. They offer specifications that meet or exceed the

familiar LM393/339 at a fraction of the supply current.

The chips are built with National's advanced Submicron Sili-

con-Gate BiCMOS process. The LMV331/393/339 have bipo-

lar input and output stages for improved noise performance.

Features

(For 5V supply, typical unless otherwise noted)

■Guaranteed 2.7V and 5V performance

■Industrial temperature range −40°C to +85°C

■Low supply current 60 µA/Channel

■Input common mode voltage range includes ground

■Low output saturation voltage 200 mV

■Propagation delay 200 ns

■Space saving 5-pin SC70 and 5-Pin SOT23 packages

Applications

■Mobile communications

■Notebooks and PDA's

■Battery powered electronics

■General purpose portable device

■General purpose low voltage applications

Typical Applications

Squarewave Oscillator

10008008

10008017

Positive Peak Detector

10008024

LMV331 Single / LMV393 Dual / LMV339 Quad General Purpose, Low Voltage, Tiny Pack

Comparators

Absolute Maximum Ratings (Note 1)

If Military/Aerospace specified devices are required,

please contact the National Semiconductor Sales Office/

Distributors for availability and specifications.

ESD Tolerance (Note 2)

Human Body Model

LMV331/393/339 800V

Machine Model

LMV331/339/393 120V

Differential Input Voltage ±Supply Voltage

Voltage on any pin

(referred to V− pin)

5.5V

Soldering Information

Infrared or Convection (20 sec) 235°C

Storage Temp. Range −65°C to +150°C

Junction Temperature (Note 3) 150°C

Operating Ratings (Note 1)

Supply Voltage 2.7V to 5.0V

Temperature Range (Note 3)

LMV393. LMV339, LMV331 −40°C to +85°C

Thermal Resistance (θJA)

5-Pin SC70 478°C/W

5-Pin SOT23 265°C/W

8-Pin SOIC 190°C/W

8-Pin MSOP 235°C/W

14-Pin SOIC 145°C/W

14-Pin TSSOP 155°C/W

2.7V DC Electrical Characteristics

Unless otherwise specified, all limits guaranteed for TJ = 25°C, V+ = 2.7V, V− = 0V. Boldface limits apply at the temperature

extremes.

Symbol Parameter Conditions Min

(Note 5)

Typ

(Note 4)

Max

(Note 5)

Units

VOS Input Offset Voltage 1.7 7 mV

TCVOS Input Offset Voltage Average Drift 5 µV/°C

IBInput Bias Current 10 250

400 nA

IOS Input Offset Current 5 50

150 nA

VCM Input Voltage Range −0.1 V

2.0 V

VSAT Saturation Voltage ISINK ≤ 1 mA 120 mV

IOOutput Sink Current VO ≤ 1.5V 5 23 mA

ISSupply Current LMV331 40 100 µA

LMV393

Both Comparators

70 140 µA

LMV339

All four Comparators

140 200 µA

Output Leakage Current .003 1µA

2.7V AC Electrical Characteristics

TJ = 25°C, V+ = 2.7V, RL = 5.1 kΩ, V− = 0V.

Symbol Parameter Conditions Min

(Note 5)

Typ

(Note 4)

Max

(Note 5)

Units

tPHL Propagation Delay (High to Low) Input Overdrive = 10 mV 1000 ns

Input Overdrive = 100 mV 350 ns

tPLH Propagation Delay (Low to High) Input Overdrive = 10 mV 500 ns

Input Overdrive = 100 mV 400 ns

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LMV331 Single / LMV393 Dual / LMV339 Quad

5V DC Electrical Characteristics

Unless otherwise specified, all limits guaranteed for TJ = 25°C, V+ = 5V, V− = 0V. Boldface limits apply at the temperature extremes.

Symbol Parameter Conditions Min

(Note 5)

Typ

(Note 4)

max

(Note 5)

Units

VOS Input Offset Voltage 1.7 7

9mV

TCVOS Input Offset Voltage Average Drift 5 µV/°C

IBInput Bias Current 25 250

400 nA

IOS Input Offset Current 2 50

150 nA

VCM Input Voltage Range −0.1 V

4.2 V

AVVoltage Gain 20 50 V/mV

Vsat Saturation Voltage ISINK ≤ 4 mA 200 400

700 mV

IOOutput Sink Current VO ≤ 1.5V 84 10 mA

ISSupply Current LMV331 60 120

150 µA

LMV393

Both Comparators

100 200

250 µA

LMV339

All four Comparators

170 300

350 µA

Output Leakage Current .003 1µA

5V AC Electrical Characteristics

TJ = 25°C, V+ = 5V, RL = 5.1 kΩ, V− = 0V.

Symbol Parameter Conditions Min

(Note 5)

Typ

(Note 4)

Max

(Note 5)

Units

tPHL Propagation Delay (High to Low) Input Overdrive = 10 mV 600 ns

Input Overdrive = 100 mV 200 ns

tPLH Propagation Delay (Low to High) Input Overdrive = 10 mV 450 ns

Input Overdrive = 100 mV 300 ns

Note 1: Absolute Maximum Ratings indicate limits beyond which damage to the device may occur. Operating Ratings indicate conditions for which the device is

intended to be functional, but specific performance is not guaranteed. For guaranteed specifications and the test conditions, see the Electrical characteristics.

Note 2: Human Body Model, applicable std. MIL-STD-883, Method 3015.7. Machine Model, applicable std. JESD22-A115-A (ESD MM std. of JEDEC)

Field-Induced Charge-Device Model, applicable std. JESD22-C101-C (ESD FICDM std. of JEDEC).

Note 3: The maximum power dissipation is a function of TJ(MAX), θJA. The maximum allowable power dissipation at any ambient temperature is

PD = (TJ(MAX) - TA)/θJA. All numbers apply for packages soldered directly onto a PC board.

Note 4: Typical values represent the most likely parametric norm as determined at the time of characterization. Actual typical values may vary over time and will

also depend on the application and configuration. The typical values are not tested and are not guaranteed on shipped production material.

Note 5: All limits are guaranteed by testing or statistical analysis.

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LMV331 Single / LMV393 Dual / LMV339 Quad

Typical Performance Characteristics Unless otherwise specified, VS = +5V, single supply, TA = 25°C

Supply Current vs. Supply Voltage Output High (LMV331)

10008034

Supply Current vs. Supply Voltage Output Low (LMV331)

10008033

Output Voltage vs. Output Current at 5V Supply

10008037

Output Voltage vs. Output Current at 2.7 Supply

10008038

Input Bias Current vs. Supply Voltage

10008036

Response Time vs. Input Overdrives Negative Transition

10008042

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LMV331 Single / LMV393 Dual / LMV339 Quad

Response Time for Input Overdrive Positive Transition

10008043

Response Time vs. Input Overdrives Negative Transition

10008041

Response Time for Input Overdrive Positive Transition

10008040

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LMV331 Single / LMV393 Dual / LMV339 Quad

Simplified Schematic

10008047

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LMV331 Single / LMV393 Dual / LMV339 Quad

Application Circuits

BASIC COMPARATOR

A basic comparator circuit is used for converting analog sig-

nals to a digital output. The LMV331/393/339 have an open-

collector output stage, which requires a pull-up resistor to a

positive supply voltage for the output to switch properly. When

the internal output transistor is off, the output voltage will be

pulled up to the external positive voltage.

The output pull-up resistor should be chosen high enough so

as to avoid excessive power dissipation yet low enough to

supply enough drive to switch whatever load circuitry is used

on the comparator output. On the LMV331/393/339 the pull-

up resistor should range between 1k to 10kΩ.

The comparator compares the input voltage (VIN) at the non-

inverting pin to the reference voltage (VREF) at the inverting

pin. If VIN is less than VREF, the output voltage (VO) is at the

saturation voltage. On the other hand, if VIN is greater than

VREF, the output voltage (VO) is at VCC.

10008026

10008004

FIGURE 1. Basic Comparator

COMPARATOR WITH HYSTERESIS

The basic comparator configuration may oscillate or produce

a noisy output if the applied differential input voltage is near

the comparator's offset voltage. This usually happens when

the input signal is moving very slowly across the comparator's

switching threshold. This problem can be prevented by the

addition of hysteresis or positive feedback.

INVERTING COMPARATOR WITH HYSTERESIS

The inverting comparator with hysteresis requires a three re-

sistor network that are referenced to the supply voltage VCC

of the comparator. When Vin at the inverting input is less than

Va, the voltage at the non-inverting node of the comparator

(Vin < Va), the output voltage is high (for simplicity assume

VO switches as high as VCC). The three network resistors can

be represented as R1//R3 in series with R2. The lower input

trip voltage Va1 is defined as

When Vin is greater than Va (Vin > Va), the output voltage is

low very close to ground. In this case the three network re-

sistors can be presented as R2//R3 in series with R1. The

upper trip voltage Va2 is defined as

The total hysteresis provided by the network is defined as

ΔVa = Va1 - Va2

To assure that the comparator will always switch fully to VCC

and not be pulled down by the load the resistors values should

be chosen as follow:

RPULL-UP << RLOAD

and R1 > RPULL-UP.

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LMV331 Single / LMV393 Dual / LMV339 Quad

10008025

FIGURE 2. Inverting Comparator with Hysteresis

NON-INVERTING COMPARATOR WITH HYSTERESIS

Non inverting comparator with hysteresis requires a two re-

sistor network, and a voltage reference (Vref) at the inverting

input. When Vin is low, the output is also low. For the output

to switch from low to high, Vin must rise up to Vin1 where

Vin1 is calculated by

When Vin is high, the output is also high, to make the com-

parator switch back to it's low state, Vin must equal Vref before

VA will again equal Vref. Vin can be calculated by:

The hysteresis of this circuit is the difference between Vin1 and

Vin2.

ΔVin = VCCR1/R2

10008022

FIGURE 3.

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LMV331 Single / LMV393 Dual / LMV339 Quad

10008023

FIGURE 4.

SQUAREWAVE OSCILLATOR

Comparators are ideal for oscillator applications. This square

wave generator uses the minimum number of components.

The output frequency is set by the RC time constant of the

capacitor C1 and the resistor in the negative feedback R4. The

maximum frequency is limited only by the large signal prop-

agation delay of the comparator in addition to any capacitive

loading at the output, which would degrade the output slew

rate.

10008008

10008024

FIGURE 5. Squarewave Oscillator

To analyze the circuit, assume that the output is initially high.

For this to be true, the voltage at the inverting input Vc has to

be less than the voltage at the non-inverting input Va. For Vc

to be low, the capacitor C1 has to be discharged and will

charge up through the negative feedback resistor R4. When

it has charged up to value equal to the voltage at the positive

input Va1, the comparator output will switch.

Va1 will be given by:

If:

R1 = R2 = R3

Then:

Va1 = 2VCC/3

When the output switches to ground, the value of Va is re-

duced by the hysteresis network to a value given by:

Va2 = VCC/3

Capacitor C1 must now discharge through R4 towards ground.

The output will return to its high state when the voltage across

the capacitor has discharged to a value equal to Va2.

For the circuit shown, the period for one cycle of oscillation

will be twice the time it takes for a single RC circuit to charge

up to one half of its final value. The time to charge the capac-

itor can be calculated from

Where Vmax is the max applied potential across the capacitor

= (2VCC/3)

and VC = Vmax/2 = VCC/3

One period will be given by:

1/freq = 2t

or calculating the exponential gives:

1/freq = 2(0.694) R4 C1

Resistors R3 and R4 must be at least two times larger than

R5 to insure that VO will go all the way up to VCC in the high

state. The frequency stability of this circuit should strictly be

a function of the external components.

FREE RUNNING MULTIVIBRATOR

A simple yet very stable oscillator that generates a clock for

slower digital systems can be obtained by using a resonator

as the feedback element. It is similar to the free running mul-

tivibrator, except that the positive feedback is obtained

through a quartz crystal. The circuit oscillates when the trans-

mission through the crystal is at a maximum, so the crystal in

its series-resonant mode.

The value of R1 and R2 are equal so that the comparator will

switch symmetrically about +VCC/2. The RC constant of R3

and C1 is set to be several times greater than the period of

the oscillating frequency, insuring a 50% duty cycle by main-

taining a DC voltage at the inverting input equal to the abso-

lute average of the output waveform.

When specifying the crystal, be sure to order series resonant

with the desired temperature coefficient

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LMV331 Single / LMV393 Dual / LMV339 Quad

10008007

FIGURE 6. Crystal controlled Oscillator

PULSE GENERATOR WITH VARIABLE DUTY CYCLE

The pulse generator with variable duty cycle is just a minor

modification of the basic square wave generator. Providing a

separate charge and discharge path for capacitor C1gener-

ates a variable duty cycle. One path, through R2 and D2 will

charge the capacitor and set the pulse width (t1). The other

path, R1 and D1 will discharge the capacitor and set the time

between pulses (t2).

By varying resistor R1, the time between pulses of the gen-

erator can be changed without changing the pulse width.

Similarly, by varying R2, the pulse width will be altered without

affecting the time between pulses. Both controls will change

the frequency of the generator. The pulse width and time be-

tween pulses can be found from:

10008009

FIGURE 7. Pulse Generator

Solving these equations for t1 and t2

t1 =R4C1ln2

t2 =R5C1ln2

These terms will have a slight error due to the fact that Vmax

is not exactly equal to 2/3 VCC but is actually reduced by the

diode drop to:

POSITIVE PEAK DETECTOR

Positive peak detector is basically the comparator operated

as a unit gain follower with a large holding capacitor from the

output to ground. Additional transistor is added to the output

to provide a low impedance current source. When the output

of the comparator goes high, current is passed through the

transistor to charge up the capacitor. The only discharge path

will be the 1 MΩ resistor shunting C1 and any load that is

connected to the output. The decay time can be altered simply

by changing the 1 MΩ resistor. The output should be used

through a high impedance follower to a avoid loading the out-

put of the peak detector.

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LMV331 Single / LMV393 Dual / LMV339 Quad

10008017

FIGURE 8. Positive Peak Detector

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

10008018

FIGURE 9. Negative Peak Detector

DRIVING CMOS AND TTL

The comparator's output is capable of driving CMOS and TTL

Logic circuits.

10008005

FIGURE 10. Driving CMOS

10008006

FIGURE 11. Driving TTL

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.

10008011

FIGURE 12. AND Gate

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 Vcc, thereby reducing the reference voltage.

A logic "1" at any of the inputs will produce a logic "1" at the

output.

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LMV331 Single / LMV393 Dual / LMV339 Quad

10008010

FIGURE 13. OR Gate

ORing THE OUTPUT

By the inherit nature of an open collector comparator, the out-

puts of several comparators can be tied together with a pull

up resistor to VCC. If one or more of the comparators outputs

goes low, the output VO will go low.

10008012

FIGURE 14. ORing the Outputs

10008013

FIGURE 15. Large Fan-In AND Gate

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LMV331 Single / LMV393 Dual / LMV339 Quad

Connection Diagrams

5-Pin SC70/SOT23

10008001

Top View

8-Pin SOIC/MSOP

10008002

Top View

14-Pin SOIC/TSSOP

10008003

Top View

Ordering Information

Package Temperature Range Packaging

Marking

Transport Media NSC

Drawing

Industrial

−40°C to +85°C

5-Pin SC70 LMV331M7 C13 1k Units Tape and Reel MAA05A

LMV331M7X C13 3k Units Tape and Reel

5-Pin SOT23 LMV331M5 C12 1k Units Tape and Reel MF05A

LMV331M5X C12 3k Units Tape and Reel

8-Pin SOIC LMV393M LMV393M Rails M08A

LMV393MX LMV393M 2.5k Units Tape and Reel

8-Pin MSOP LMV393MM V393 1k Units Tape and Reel MUA08A

LMV393MMX V393 3.5k Units Tape and Reel

14-Pin SOIC LMV339M LMV339M Rails M14A

LMV339MX LMV339M 2.5k Units Tape and Reel

14-Pin TSSOP LMV339MT LMV339MT Rails MTC14

LMV339MTX LMV339MT 2.5k Units Tape and Reel

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LMV331 Single / LMV393 Dual / LMV339 Quad

SC70-5 Tape and Reel Specification

10008044

SOT-23-5 Tape and Reel

Specification

TAPE FORMAT

Tape Section # Cavities Cavity Status Cover Tape Status

Leader 0 (min) Empty Sealed

(Start End) 75 (min) Empty Sealed

Carrier 3000 Filled Sealed

250 Filled Sealed

Trailer 125 (min) Empty Sealed

(Hub End) 0 (min) Empty Sealed

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LMV331 Single / LMV393 Dual / LMV339 Quad

TAPE DIMENSIONS

10008045

8 mm 0.130 0.124 0.130 0.126 0.138 ±0.002 0.055 ±0.004 0.157 0.315 ±0.012

(3.3) (3.15) (3.3) (3.2) (3.5 ±0.05) (1.4 ±0.11) (4) (8 ±0.3)

Tape Size DIM A DIM Ao DIM B DIM Bo DIM F DIM Ko DIM P1 DIM W

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LMV331 Single / LMV393 Dual / LMV339 Quad

REEL DIMENSIONS

10008046

8 mm 7.00 0.059 0.512 0.795 2.165 0.331 + 0.059/−0.000 0.567 W1+ 0.078/−0.039

330.00 1.50 13.00 20.20 55.00 8.40 + 1.50/−0.00 14.40 W1 + 2.00/−1.00

Tape Size A B C D N W1 W2 W3

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LMV331 Single / LMV393 Dual / LMV339 Quad

Physical Dimensions inches (millimeters) unless otherwise noted

5-Pin SC70

NS Package Number MAA05A

5-Pin SOT23

NS Package Number MF05A

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LMV331 Single / LMV393 Dual / LMV339 Quad

8-Pin SOIC

NS Package Number M08A

8-Pin MSOP

NS Package Number MUA08A

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LMV331 Single / LMV393 Dual / LMV339 Quad

14-Pin SOIC

NS Package Number M14A

14-Pin TSSOP

NS Package Number MTC14

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LMV331 Single / LMV393 Dual / LMV339 Quad

Notes

LMV331 Single / LMV393 Dual / LMV339 Quad General Purpose, Low Voltage, Tiny Pack

Comparators

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