LMV7235_08 Datasheet, PDF (1/14 Pages) National Semiconductor (TI) – 45 nsec, Ultra Low Power, Low Voltage, Rail-to-Rail Input Comparator with Open-Drain/Push-Pull Output

July 2, 2008
LMV7235/LMV7239
45 nsec, Ultra Low Power, Low Voltage, Rail-to-Rail Input
Comparator with Open-Drain/Push-Pull Output
General Description
The LMV7235/LMV7239 are ultra low power, low voltage, 45
nsec comparators. They are guaranteed to operate over the
full supply voltage range of 2.7V to 5.5V. These devices
achieve a 45 nsec propagation delay while consuming only
65µA of supply current at 5V.
The LMV7235/LMV7239 have a greater than rail-to-rail com-
mon mode voltage range. The input common mode voltage
range extends 200mV below ground and 200mV above sup-
ply, 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 re-
sistor.
The LMV7235/LMV7239 are available in the 5-Pin SC70 and
5-Pin SOT23 packages, which are ideal for systems where
small size and low power is critical.
Features
(V_S = 5V, T_A = 25°C, Typical values unless otherwise speci-
fied)
■ ^{Propagation delay}
45 nsec
■ ^{Low supply current}
65µA
■ ^{Rail-to-Rail input}
■ ^{Open drain and push-pull output}
■ ^{Ideal for 2.7V and 5V single supply applications}
■ ^{Available in space saving packages}
— 5-pin SOT23
— 5-pin SC70
Applications
■ ^{Portable and battery powered systems}
■ ^Scanners
■ ^{Set top boxes}
■ ^{High speed differential line receiver}
■ ^{Window comparators}
■ ^{Zero-crossing detectors}
■ ^{High speed sampling circuits}
Typical Application
Crystal Oscillator
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