NSC LMV7239MWC, LMV7239MDC, LMV7239M7X, LMV7239M5, LMV7239M7 Datasheet

LMV7235/LMV7239
45ns, Ultra Low Power, Low Voltage, Rail-to-Rail Input
Comparator with Open-Drain/Push-Pull Output

General Description

The LMV7235/39 are ultra low power, low voltage, 45ns
comparators. They are guaranteed to operate over the full
supply voltage range of 2.7V to 5V. These devices achieve a
45ns propagation delay while consuming only 65µA of sup­ply current at 5V.

The LMV7235/39 have a greater than rail-to-rail common
mode voltage range. Theinputcommonmodevoltagerange
extends 200mV below ground and 200mV above supply,
allowing both ground and supply sensing.

The LMV7235 features an open drain output. By connecting
an external resistor, the output of the comparator can be
used as a level shifter.

The LMV7239 features a push-pull output stage. This feature
allows operation without the need of an external pull-up
resistor.

The LMV7235/39 are available in the SC70-5 and SOT23-5
packages, which are ideal for systems where small size and
low power is critical.

Features

(VS=5V,TA= 25˚C, Typical values unless otherwise speci­fied)

n Propagation delay 45ns
n Low supply current 65µA
n Rail-to-Rail input
n Open drain and push-pull output
n Ideal for 2.7V and 5V single supply applications
n Available in space saving packages: 5-pin SOT23-5

and 5-pin SC70-5

Applications

n Portable and battery powered systems
n Scanners
n Set top boxes
n High speed differential line receiver
n Window comparators
n Zero-crossing detectors
n High speed sampling circuits

Typical Application

10135902

February 2002

LMV7235/LMV7239 45 nsec, Ultra Low Power, Low Voltage, Rail-to-Rail Input Comparator with

Open-Drain/Push-Pull Output

© 2002 National Semiconductor Corporation DS101359 www.national.com

Connection Diagram

SC70-5/SOT23-5

10135903

Top View

Ordering Information

Package Part Number Marking Supplied as NSC Drawing

5-pin SC70-5

LMV7235M7 C21 1k Units Tape and Reel

MAA05ALMV7235M7X C21 3k Units Tape and Reel

LMV7239M7 C20 1k Units Tape and Reel

LMV7239M7X C20 3k Units Tape and Reel

5-pin SOT23-5

LMV7235M5 C21A 1k Units Tape and Reel

MF05ALMV7235M5X C21A 3k Units Tape and Reel

LMV7239M5 C20A 1k Units Tape and Reel

LMV7239M5X C20A 3k Units Tape and Reel

Simplified Schematic

10135901

LMV7235/LMV7239

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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)

Machine Body 100V
Human Model Body 1000V

Differential Input Voltage

±

Supply Voltage
Output Short Circuit Duration (Note 3)
Supply Voltage (V

+-V−

) 5.5V

Soldering Information

Infrared or Convection (20 sec) 235˚C
Wave Soldering (10 sec) 260˚C (lead temp)

Voltage at Input/Output Pins (V

+

) +0.3V

(V

−

) −0.3V

Current at Input Pin (Note 9)

±

10mA

Operating Ratings

Supply Voltages (V+-V−) 2.7V to 5V
Junction Temperature Range

(Note 4)

−40˚C to +85˚C

Storage Temperature Range −65˚C to +150˚C
Package Thermal Resistance

SC70-5 478˚C/W
SOT23-5 265˚C/W

2.7V Electrical Characteristics

Unless otherwise specified, all limits guaranteed for TJ= 25˚C, VCM=V+/2, V+= 2.7V, V−=0V−.Boldface limits apply at the
temperature extremes.

Symbol Parameter Conditions Typ

(Note 5)

Limits

(Note 6)

Units

V

OS

Input Offset Voltage 0.8 6

8

mV

max

I

B

Input Bias Current 30 400

600

nA

max

I

OS

Input Offset Current 5 200

400

nA

max

CMRR Common Mode Rejection Ratio 0V

<

V

CM

<

2.7V

(Note 7)

62 52 dB

min

PSRR Power Supply Rejection Ratio V

+

= 2.7V to 5V 85 65 dB

min

V

CM

Input Common-Mode Voltage Range CMRR>50dB V++0.2 V++0.1

V

+

V

min

−0.2 −0.1

0

V

max

V

O

Output Swing High
(LMV7239 only)

IL= 4mA,
V

ID

= 500mV

V

+

−0.26 V+−0.35 V
min

I

L

= 0.4mA,

V

ID

= 500mV

V

+

−0.02 V
min

Output Swing Low
(LMV7239/LMV7235)

I

L

= −4mA,

V

ID

= −500mV

230 350

450

mV

max

I

L

= −0.4mA,

V

ID

= −500mV

15 mV

max

I

SC

Output Short Circuit Current Sourcing, VO=0V

(LMV7239 only)
(Note 3)

15 mA

Sinking, V

O

= 2.7V

(LMV7235 R

L

= 10k) (Note 3)

20 mA

I

S

Supply Current No load 52 85

100

µA

max

LMV7235/LMV7239

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2.7V Electrical Characteristics (Continued)

Unless otherwise specified, all limits guaranteed for TJ= 25˚C, VCM=V+/2, V+= 2.7V, V−=0V−.Boldface limits apply at the
temperature extremes.

Symbol Parameter Conditions Typ

(Note 5)

Limits

(Note 6)

Units

t

PD

Propagation Delay Overdrive = 20mV

(Note 10)

68 ns

Overdrive = 50mV
(Note 10)

63 ns

Overdrive = 100mV
(Note 10)

50 ns

t

SKEW

Propagation Delay Skew
(LMV7239 only)

(Note 8) 5 ns

t

r

Output Rise Time LMV7239

10% to 90%

1.7 ns

LMV7235
10% to 90%
(Note 10)

112 ns

t

f

Output Fall Time 90% to 10% 1.7 ns

I

LEAKAGE

Output Leakage Current
(LMV7235 only)

3nA

5V Electrical Characteristics

Unless otherwise specified, all limits guaranteed for TJ= 25˚C, VCM=V+/2, V+= 5V, V−= 0V. Boldface limits apply at the
temperature extremes.

Symbol Parameter Conditions Typ

(Note 5)

Limits

(Note 6)

Units

V

OS

Input Offset Voltage 1 6

8

mV

max

I

B

Input Bias Current 30 400

600

nA

max

I

OS

Input Offset Current 5 200

400

nA

max

CMRR Common Mode Rejection Ratio 0V

<

V

CM

<

5V 67 52 dB

min

PSRR Power Supply Rejection Ratio V

+

= 2.7V to 5V 85 65 dB

min

V

CM

Input Common-Mode Voltage Range CMRR>50dB V++0.2 V++0.1

V

+

V

min

−0.2 −0.1

0

V

max

V

O

Output Swing High
(LMV7239 only)

IL= 4mA,
V

ID

= 500mV

V

+

−0.15 V+−0.25 V
min

I

L

= 0.4mA,

V

ID

= 500mV

V

+

−0.01 V
min

Output Swing Low
(LMV7239/LMV7235)

I

L

= −4mA,

V

ID

= −500mV

230 350

450

mV

max

I

L

= −0.4mA,

V

ID

= −500mV

10 mV

max

LMV7235/LMV7239

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