Part Number: LM339AN

Manufacturer: Texas Instruments


Shipped from: Shenzhen/HK Warehouse

Stock Available: Check with us

Technical Specifications of LM339AN

Datasheet  LM339AN datasheet
Category Integrated Circuits (ICs)
Family Linear – Comparators
Manufacturer STMicroelectronics
Packaging Tube
Part Status Obsolete
Type General Purpose
Number of Elements 4
Output Type CMOS, DTL, ECL, MOS, Open-Collector, TTL
Voltage – Supply, Single/Dual (±) 2 V ~ 32 V, ±1 V ~ 16 V
Voltage – Input Offset (Max) 2mV @ 30V
Current – Input Bias (Max) 0.1μA @ 5V
Current – Output (Typ) 16mA @ 5V
Current – Quiescent (Max) 2.5mA
Propagation Delay (Max)
Operating Temperature 0°C ~ 70°C
Package / Case 14-DIP (0.300″, 7.62mm)
Mounting Type Through Hole
Supplier Device Package 14-DIP

LM339AN Introduction

As successors to the popular LM339 and LM2901 families of comparators, the LM339B and LM2901B families provide enhanced functionality. Reduced offset voltage, increased supply voltage capabilities, reduced supply current, reduced input bias current, reduced propagation delay, enhanced ESD performance and increased input ruggedness are just some of the improvements made in the B version of these comparators.

Drop-in replacements for LM239s, LM339s, and LM2901s of A and V quality. The LM339B and the LM2901B have four voltage comparators but only require a single power supply. Now we’ll examine the LM339A, a member of this family of devices, to learn more about its capabilities, specification, and common uses.

LM339AN Description

Being the successors to the widely used LM339 and LM2901 families of comparators, the LM339B and LM2901B devices represent the current gold standard. Better 2 kV ESD performance and input ruggedness are provided by specialized ESD clamps, and the offset voltage is lower, the supply current is lower, the input bias current is lower, and the propagation latency is reduced in these next-generation B-version comparators.

The LM339B and the LM2901B are pin-compatible with their “A” and “V” counterparts, the LM239, LM339, and LM2901. Each unit is a quartet of voltage comparators that can run on a single power source across a wide voltage range.

Features for the LM339A

  • The LM239, LM331, and LM2901 B variants are pin-compatible with the A and V versions.
  • The ground voltage is included in the common-mode input voltage range.
  • Saturation voltage at low output.
  • TTL, MOS, and CMOS outputs are all supported.
  • The TL331B is the single-unit variant.
  • The LM393B and LM2903B are dual versions of this chip.

Detailed Description

As quad comparators, the LMx39 and LM2901x can work with supply voltages up to 36 V. This common tool has been used well in various contexts, proving its widespread usefulness. This is because the device has a low Iq, a fast response time, and a wide supply voltage range (from 2 V to 32 V). Since the comparator has an open-drain output, it can be employed in AND functionality, and its output logic can be configured for low voltage (VOL).

Feature Description

The PNP Darlington pair input enables the comparator to function with extremely high gain and fast reaction at a low input bias current. The comparator’s accuracy is maintained from ground to (VCC – 1.5 V) differential input thanks to the input Darlington pair, which limits the input common-mode voltage capacity.

While operating at low temperatures, a margin of (VCC – 2 V) should be built in. An open-collector NPN transistor serves as the output. When the negative input voltage is higher than both the positive and offset voltage, a voltage inverter will be said to have an inverting output; the output NPN acts as a current sink. Since the VOL is resistive, its value increases proportionally with the delivered current.

Voltage Comparison

The comparator’s primary function is to perform a voltage comparison between its positive and negative pins and, based on the result of that comparison, either output a logic low or a high impedance. Based on the outcome of that comparison, the comparator will either produce a high impedance or a logic low.

Application Information

A comparator is a device that compares one signal to another or a reference. Many users rely on the open-drain output to send the comparison results to a microcontroller or logic device at a suitable logic voltage level. If you need to level shift to a higher or lower voltage, the LMx39 or LM2901x is your best bet due to its wide supply range and high voltage capacity.

Typical Application

Voltage Input Variation While choosing the input voltage range, it is necessary to consider the input common-mode voltage range, often known as the VICR. If the operating temperature is either more than or below 25 degrees Celsius, the VICR can function anywhere from 0 to VCC minus 2 volts. As a result, the voltage at the input cannot be higher than VCC minus 2 V nor lower than 0 V. If you operate outside of this range, it is possible to get comparisons that are not entirely accurate.

Minimum Overdrive Voltage

The voltage difference between the comparator’s positive and negative inputs is the overdrive voltage (VIO). Overdrive voltage (VOD) must be greater than the input offset voltage for proper evaluation (VIO). The response time of the comparator is influenced by the overdrive voltage, with a slower response time resulting from higher overdrive.

Output and Drive Current

The load and the pull-up resistance, as well as the logic and pullup voltage, are responsible for determining the output current. The comparator generates a low-level output voltage (VOL) directly from the output current. The VOL to output current ratio is known as the output current percentage. It is also possible for the output current to influence the transient response.

Power Supply Recommendations

Use a bypass capacitor on the supply pin to reject any variation in the supply voltage while working with applications requiring a rapid reaction or comparison with noisy or AC inputs. This fluctuation can potentially influence the common-mode range of the comparator input, which will result in an erroneous comparison.

Layout Guidelines

Maintaining a stable power supply with minimal noise and glitches, which can damage the high-level input common-mode voltage range, is necessary to develop an accurate comparator application that does not exhibit hysteresis. To reach this level of accuracy, you will need to install a bypass capacitor between the voltage source and the ground terminal of the circuit. It is recommended that a bypass capacitor be installed between the positive and negative power supply (if available).


In conclusion, the LM339AN comparator circuit from Texas Instruments is an exceptional choice for discerning larger input voltage and current signals in electronic devices. Its reliable and efficient performance is further enhanced by a wide range of dual supply voltage options and a temperature range of 0°C to 70°C, making it an excellent investment for your project. With the added benefit of an open collector output and 4 channels per chip, this device offers exceptional versatility for various applications. Don’t wait any longer to take your project to new heights – order the LM339AN from ICRFQ today! You can trust our top-quality products and exceptional customer service to ensure you receive the best experience possible.

4.8/5 - (397 votes)
Kevin Chen