LMV7235_06 Datasheet, PDF (1/13 Pages) National Semiconductor (TI) – 45 nsec, Ultra Low Power, Low Voltage, Rail-to-Rail Input Comparator with Open-Drain/Push-Pull Output

August 2006
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 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
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/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)
n Propagation delay
45 nsec
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-pin SC70
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
Crystal Oscillator
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