LM239PW

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Analog Comparators Quad Differential Comparator

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LM239PW DataSheet

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LM239PW Details

The LM239PW is a quad voltage comparator from Texas Instruments, designed for precision voltage comparison in various analog applications. This IC offers four independent comparators in a single package, each with high input impedance and low input offset voltage. It is ideal for use in voltage monitoring, level shifting, and signal detection circuits.

Pinout

  • 1 (IN1-): Inverting Input 1
  • 2 (IN1+): Non-inverting Input 1
  • 3 (VCC+): Positive Power Supply
  • 4 (IN2-): Inverting Input 2
  • 5 (IN2+): Non-inverting Input 2
  • 6 (OUT2): Output 2
  • 7 (OUT1): Output 1
  • 8 (GND): Ground

(Tip: For detailed pinout information, please refer to the corresponding datasheet.)

Key Features

  • Quad Comparators: Contains four independent comparators in one package.
  • Low Input Offset Voltage: Provides accurate voltage comparison with minimal offset.
  • High Input Impedance: Offers high input impedance for versatile circuit integration.
  • Wide Power Supply Range: Operates over a wide power supply range for flexible usage.
  • Flexible Output Options: Supports open-drain and push-pull output configurations.

Application

  • Voltage Monitoring: Suitable for monitoring voltage levels in power supplies and battery management systems.
  • Signal Detection: Used in signal detection circuits for threshold detection and signal conditioning.
  • Level Shifting: Ideal for level shifting applications where precise voltage comparison is required.

Where to Use

The LM239PW is commonly used in applications that require reliable and precise voltage comparison. It is well-suited for monitoring voltage levels, detecting signals, and shifting voltage levels in various electronic systems.

How to Use

Connect the LM239PW to your circuit by providing power supply connections to VCC+ and GND. Input the voltages to be compared at the non-inverting (IN+) and inverting (IN-) inputs. Monitor the outputs (OUT) for the comparison results. Ensure proper decoupling and bypass capacitors for stable performance. For detailed usage instructions, refer to the datasheet.

Application Circuit

The application circuit diagram for the LM239PW illustrates how to connect the voltage comparators in a typical application circuit. The connections include power supply, input signals, and output configurations for voltage comparison.

(Tip: For detailed circuit diagram connections and usage guide, refer to the datasheet.)

Equivalents

  • LM339: A similar quad comparator from Texas Instruments offering comparable features and performance.
  • LM311: An alternative comparator with different functionality but suitable for voltage comparison applications.

Complementary

The LM239PW can be complemented by the LM2903, which provides dual voltage comparators in a single package, suitable for applications requiring fewer comparators.

When selecting complementary comparators, ensure compatibility with your application requirements for optimal performance.

Frequently Asked Questions

Q: What is the input voltage range of the LM239PW?

A: The LM239PW can typically accept input voltages within the power supply range. Refer to the datasheet for specific voltage input limits and conditions.

Q: Can the LM239PW be used in battery monitoring circuits?

A: Yes, the LM239PW is suitable for battery monitoring applications where voltage comparison and threshold detection are essential for accurate monitoring.

LM239PW

Specifications

The followings are basic parameters of the part selected concerning the characteristics of the part and categories it belongs to.

Number of channels 4 Output type Open-collector
Propagation delay time (µs) 1.3 Vs (max) (V) 36
Vs (min) (V) 2 Vos (offset voltage at 25°C) (max) (mV) 5
Iq per channel (typ) (mA) 0.2 Input bias current (±) (max) (nA) 250
Rail-to-rail Out Rating Catalog
Operating temperature range (°C) -25 to 85 Features Standard comparator
VICR (max) (V) 28.5 VICR (min) (V) 0

Datasheet PDF

Datasheets record the features, absolute maximum ratings, applications and more of the device, which benefit a lot as an overall guide to the specific application of the part.

Preliminary Specification LM239PW PDF Download

FAQs

What is LM239PW?

The LM239PW is a quad, low-power, voltage comparator designed by Texas Instruments. It is ideal for applications requiring precision voltage comparisons, such as threshold detection, level shifting, and signal conditioning in automotive, industrial, and consumer electronics.

How Does LM239PW Work?

The LM239PW operates as a voltage comparator, comparing input voltage signals with a reference voltage and providing a digital output based on the comparison result. It features low input offset voltage and high input impedance, making it suitable for precise voltage detection and measurement applications.

How Many Pins does LM239PW have and What are the Functions of the Pinout Configuration?

The LM239PW is housed in a 14-pin TSSOP (Thin Shrink Small Outline Package) package. The pinout configuration includes:

  • VCC+: Positive power supply pin.
  • VCC-: Negative power supply pin.
  • IN1, IN2, IN3, IN4: Non-inverting input pins for the four comparators.
  • IN1-, IN2-, IN3-, IN4-: Inverting input pins for the four comparators.
  • OUT1, OUT2, OUT3, OUT4: Output pins for the four comparators.

What are the Pros and Cons of LM239PW?

Pros:

  • Quad Comparator: Includes four independent comparators in a single package, providing flexibility in multi-channel applications.
  • Low Power Consumption: Operates with low power, suitable for battery-powered and portable devices.
  • Wide Supply Voltage Range: Supports a wide supply voltage range, enhancing versatility in different systems.
  • Stable Operation: Provides stable operation over a wide temperature range, suitable for harsh environments.
  • Compact Package: The 14-pin TSSOP package is space-efficient, suitable for compact designs.

Cons:

  • Limited Bandwidth: May not be suitable for high-frequency applications.
  • Open-Collector Outputs: The outputs are open-collector, requiring external pull-up resistors in certain applications.

Are There Any Equivalents/Alternatives to LM239PW for Recommendation?

  • The LM339 from Texas Instruments is a similar quad voltage comparator with open-collector outputs.
  • Alternatives to the LM239PW include the LM3302 from STMicroelectronics and the MC3302 from ON Semiconductor.

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