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LMV7239-Q1 Datasheet(PDF) 17 Page - Texas Instruments

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Part No. LMV7239-Q1
Description  75-ns, Ultra Low Power, Low Voltage, Rail-to-Rail Input Comparator with Open-Drain and Push-Pull Output
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Maker  TI1 [Texas Instruments]
Homepage  http://www.ti.com
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LMV7239-Q1 Datasheet(HTML) 17 Page - Texas Instruments

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V
+
R1
R2
R3
-
+
-
+
OUTPUT A
OUTPUT B
VREF2
VREF1
A
B
VIN
Crystal
100K
VOUT
0.1uF
VCC
100K
100K
LMV7235, LMV7239, LMV7239-Q1
www.ti.com
SNOS532N – SEPTEMBER 2000 – REVISED APRIL 2015
Typical Applications (continued)
Figure 27. Crystal Oscillator
9.2.3 Infrared (IR) Receiver
The LMV7235, LMV7239 and LMV7239-Q1 can also be used as an infrared receiver. The infrared photo diode
creates a current relative to the amount of infrared light present. The current creates a voltage across RD. When
this voltage level cross the voltage applied by the voltage divider to the inverting input, the output transitions.
Figure 28. IR Receiver
9.2.4 Window Detector
Figure 29. Window Detector
A window detector monitors the input signal to determine if it falls between two voltage levels. Both outputs are
true (high) when VREF1 < VIN < VREF2
Copyright © 2000–2015, Texas Instruments Incorporated
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Product Folder Links: LMV7235 LMV7239 LMV7239-Q1


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