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PDF LMV7239 Data sheet ( Hoja de datos )
| Número de pieza | LMV7239 | |
| Descripción | 45ns / Ultra Low Power / Low Voltage / Rail-to-Rail Input Comparator with Open-Drain/Push-Pull Output | |
| Fabricantes | National Semiconductor | |
| Logotipo |  |
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February 2002
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 sup-
ply current at 5V.
The LMV7235/39 have a greater than rail-to-rail common
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 LMV7235/39 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 speci-
fied)
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
© 2002 National Semiconductor Corporation DS101359
10135902
www.national.com
1 page  
5V Electrical Characteristics (Continued)
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
ISC Output Short Circuit Current
Sourcing, VO = 0V
(LMV7239 only)
(Note 3)
55 25 mA
15 min
Sinking, VO = 5V
(LMV7235 RL = 10k)
(Note 3)
60 30 mA
20 min
IS Supply Current
No load
65 95 µA
110 max
tPD Propagation Delay
Overdrive = 20mV
(Note 10)
62 ns
max
Overdrive = 50mV
(Note 10)
57 ns
max
Overdrive = 100mV
45
ns
(Note 10)
max
tSKEW
Propagation Delay Skew
(LMV7239 only)
(Note 8)
5 ns
tr Output Rise Time
LMV7239
10% to 90%
1.2 ns
LMV7235
10% to 90%
(Note 10)
100 ns
tf
ILEAKAGE
Output Fall Time
Output Leakeage Current
(LMV7235 only)
90% to 10%
1.2 ns
3 nA
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, 1.5kΩ in series with 100pF. Machine model, 200pF.
Note 3: Applies to both single-supply and split-supply operation. Continuous short circuit operation at elevated ambient temperature can result in exceeding the
maximum allowed junction temperature of 150˚C. Output currents in excess of ±30mA over long term may adversely affect reliability.
Note 4: The maximum power dissipation is a function of TJ(max), θJA, and TA. The maximum allowable power dissipation at any ambient temperature is
PD = (TJ(max) - TA)/θJA. All numbers apply for packages soldered directly into a PC board.
Note 5: Typical Values represent the most likely parametric norm.
Note 6: All limits are guaranteed by testing or statistical analysis.
Note 7: CMRR is not linear over the common mode range. Limits are guaranteed over the worst case from 0 to VCC/2 or VCC/2 to VCC.
Note 8: Propagation Delay Skew is defined as the absolute value of the difference between tPDLH and tPDHL.
Note 9: Limiting input pin current is only necessary for input voltages that exceed absolute maximum input voltage ratings.
Note 10: A 10k pull-up resistor was used when measuring the LMV7235. The rise time of the LMV7235 is a function of the R-C time constant.
5 www.national.com
5 Page 
Physical Dimensions inches (millimeters) unless otherwise noted
5-Pin SC70-5
NS Package Number MAA05A
11 www.national.com
11 Page | ||
| Páginas | Total 12 Páginas | |
| PDF Descargar | [ Datasheet LMV7239.PDF ] | |
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