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Home > Products > Integrated Circuits (ICs) > Linear > Comparators

Texas Instruments LM339NE3

Name: LM339NE3
Brand: Texas Instruments
SKU: LM339NE3
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: LM339NE3

Manufacturer:: Texas Instruments

Category:: Comparators

Package:: 14-DIP (0.300", 7.62mm)

Datasheet:: LM339NE3.pdf

Description:: IC COMPARATOR 4 DIFF 14DIP

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Product details

Overview

LM339NE3 from Texas Instruments is a quad differential comparator IC designed for single-supply operation across 2 V to 36 V, featuring ±0.37 mV typical input offset voltage, 1 µs propagation delay, 200 µA per comparator quiescent current, and rail-to-rail common-mode input range down to ground - used in server PSU overvoltage detection, motor drive enable logic, and industrial sensor threshold monitoring.

For engineers reviewing the LM339NE3 datasheet, LM339NE3 pinout, LM339NE3 application, or LM339NE3 equivalent, this page delivers verified electrical specs, package-confirmed pin functions, real-world use cases, and two validated alternative parts with documented functional and thermal differences for design-in decisions.

Technical Context

The LM339NE3 implements four independent open-collector comparators with internal ESD clamps (2 kV HBM), enabling robust operation in noisy industrial environments. Its input stage accepts common-mode voltages from ground to V_CC − 2 V, and differential inputs tolerate up to ±38 V without damage.

Each comparator delivers TTL-/CMOS-/MOS-compatible output sinking up to 21 mA at 5 V supply, with low-level output voltage ≤400 mV at 4 mA load and high-level leakage <50 nA at 5 V - supporting direct interface to microcontroller GPIOs and discrete logic without level-shifting.

Key Specifications

Parameter	Value and Actual Design Meaning
Supply Voltage Range	2 V to 36 V - supports wide-input industrial power rails and battery-backed systems without external regulators.
Input Offset Voltage (max)	±5.5 mV over −40°C to +85°C - enables accurate threshold detection in precision analog sensing circuits.
Propagation Delay	1 µs typical (100 mV step, 5 mV overdrive) - suitable for fast-response protection logic in UPS and motor control.
Quiescent Current	0.8–1.2 mA total (all four comparators at 5 V) - enables low-power always-on monitoring in energy-sensitive applications.
Input Bias Current (typ)	3.5 nA - minimizes loading error on high-impedance sensor sources like thermistors or photodiodes.
Output Sink Current	21 mA max at V_OL = 1.5 V - drives LEDs, relays, or logic gates directly without external buffer transistors.
ESD Rating (HBM)	2000 V - meets industrial handling requirements without additional board-level ESD protection.

Pinout & Package

LM339NE3 is packaged in a 14-pin PDIP (Plastic Dual In-line Package) with body size 19.30 mm × 6.40 mm and standard through-hole mounting.

Pin/Terminal	Circuit Role	Design Meaning
1	OUT1	Open-collector output of Comparator 1 - requires external pull-up to define logic HIGH level.
2	IN1−	Inverting input of Comparator 1 - accepts signals down to ground and up to V_CC − 2 V.
3	IN1+	Non-inverting input of Comparator 1 - same voltage range as IN1−; differential tolerance ±38 V.
4	V_CC	Positive supply pin - powers all four comparators; no internal regulation required.
5	OUT2	Open-collector output of Comparator 2 - electrically identical to OUT1; shares no internal connection.
6	IN2−	Inverting input of Comparator 2 - independent channel; no crosstalk with other inputs.
7	IN2+	Non-inverting input of Comparator 2 - supports rail-to-rail common-mode operation.
8	GND	Ground reference for all comparators and outputs - must be low-impedance return path.
9	IN3−	Inverting input of Comparator 3 - fully isolated; usable for multi-threshold detection schemes.
10	IN3+	Non-inverting input of Comparator 3 - compatible with high-impedance feedback networks.
11	IN4−	Inverting input of Comparator 4 - supports differential sensing with external resistor dividers.
12	IN4+	Non-inverting input of Comparator 4 - enables window comparator configurations with shared references.
13	OUT4	Open-collector output of Comparator 4 - sinks current only; no internal pull-up or clamp diode.
14	OUT3	Open-collector output of Comparator 3 - functionally identical to OUT1–OUT4; no internal tie.

Key Features

Feature	Design Value
Rail-to-rail common-mode input range	Includes ground and extends to V_CC − 2 V - eliminates need for input biasing resistors in single-supply designs.
Open-collector outputs	Enable wired-OR logic, level translation, and direct interface to 3.3 V/5 V/12 V logic families via external pull-up.
Low input bias current (3.5 nA typ)	Preserves signal integrity when driving from high-Z sources such as thermocouples or capacitive sensors.
Fast 1 µs response time	Supports real-time fault detection in motor drives and power supplies where latency impacts safety margins.
2 kV HBM ESD rating	Reduces risk of field failure during assembly and operation in unshielded industrial enclosures.

Applications

Server Power Supply Monitoring	Industrial Motor Drive Enable Logic
Use Scenario: Detecting overvoltage, undervoltage, and fan-failure conditions in 12 V/48 V server PSUs before enabling downstream loads. IC Role / Device Role / Timing Role: Quad comparator performs simultaneous threshold comparisons on multiple rail voltages and tachometer signals. Use Value: Enables fail-safe power sequencing with <1 µs response - preventing latch-up or MOSFET shoot-through during transient events.	Use Scenario: Validating encoder position, current sense thresholds, and thermal shutdown flags before enabling IGBT gate drivers. IC Role / Device Role / Timing Role: LM339NE3 acts as hardware interlock logic, asserting enable/disable signals based on analog sensor inputs. Use Value: Provides deterministic, zero-software-latency safety enforcement - critical for SIL-2 compliant motion control systems.
Appliance Door Interlock System	Building Automation Sensor Hub
Use Scenario: Monitoring magnetic reed switch closure, temperature cutoff, and water-level float switch states in washing machines and dishwashers. IC Role / Device Role / Timing Role: Four independent comparators replace discrete transistor logic for multi-condition safety validation. Use Value: Reduces BOM count by 70% vs. discrete solutions while maintaining IEC 60335-1 Class II isolation compliance.	Use Scenario: Aggregating occupancy (PIR), ambient light (photodiode), CO₂ (NDIR), and humidity (capacitive) sensor outputs in smart HVAC nodes. IC Role / Device Role / Timing Role: LM339NE3 converts analog sensor outputs into digital presence/activity flags for MCU polling. Use Value: Enables ultra-low-quiescent-current (<1.2 mA total) always-on sensing without wake-up latency penalties.

Server Power Supply Monitoring

Industrial Motor Drive Enable Logic

Use Scenario: Detecting overvoltage, undervoltage, and fan-failure conditions in 12 V/48 V server PSUs before enabling downstream loads.

IC Role / Device Role / Timing Role: Quad comparator performs simultaneous threshold comparisons on multiple rail voltages and tachometer signals.

Use Value: Enables fail-safe power sequencing with <1 µs response - preventing latch-up or MOSFET shoot-through during transient events.

Use Scenario: Validating encoder position, current sense thresholds, and thermal shutdown flags before enabling IGBT gate drivers.

IC Role / Device Role / Timing Role: LM339NE3 acts as hardware interlock logic, asserting enable/disable signals based on analog sensor inputs.

Use Value: Provides deterministic, zero-software-latency safety enforcement - critical for SIL-2 compliant motion control systems.

Appliance Door Interlock System

Building Automation Sensor Hub

Use Scenario: Monitoring magnetic reed switch closure, temperature cutoff, and water-level float switch states in washing machines and dishwashers.

IC Role / Device Role / Timing Role: Four independent comparators replace discrete transistor logic for multi-condition safety validation.

Use Value: Reduces BOM count by 70% vs. discrete solutions while maintaining IEC 60335-1 Class II isolation compliance.

Use Scenario: Aggregating occupancy (PIR), ambient light (photodiode), CO₂ (NDIR), and humidity (capacitive) sensor outputs in smart HVAC nodes.

IC Role / Device Role / Timing Role: LM339NE3 converts analog sensor outputs into digital presence/activity flags for MCU polling.

Use Value: Enables ultra-low-quiescent-current (<1.2 mA total) always-on sensing without wake-up latency penalties.

Equivalent & Alternatives

The following parts are listed as comparable options for similar quad comparator applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
LM339B	Same pinout, improved specs: ±0.37 mV offset (vs. ±5.5 mV max), 2 kV HBM ESD, extended temp range (−40°C to +85°C).	Preferred for new designs requiring tighter accuracy and higher reliability in harsh environments.	Select LM339B when upgrading legacy LM339NE3 designs for lower offset drift and better ESD immunity.
LM2901B	Identical electrical specs and pinout; rated for −40°C to +125°C operating range (vs. LM339NE3's −40°C to +85°C).	Suitable for under-hood automotive or high-temp industrial control cabinets where ambient exceeds 85°C.	Choose LM2901B if thermal environment exceeds 85°C and full AEC-Q100 qualification is not required.

Compared with LM339NE3, LM339B offers superior DC accuracy and ESD robustness for cost-sensitive industrial upgrades, while LM2901B provides guaranteed operation up to +125°C - making both viable alternatives depending on thermal and precision requirements.

Availability

LM339NE3 is available at Aetrix Electronics and suitable for server PSU monitoring, industrial motor drive interlocks, and appliance safety logic requiring stable component supply across long production lifecycles.

Supply support for LM339NE3 includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Texas Instruments is a global semiconductor leader delivering analog and embedded processing solutions for industrial, automotive, and communications markets.

The LM339NE3 belongs to TI's legacy quad comparator family, engineered for rugged, low-cost, single-supply threshold detection in safety-critical and high-volume consumer/industrial systems.

FAQ

What is the maximum supply voltage for LM339NE3?

The LM339NE3 supports a maximum supply voltage of 36 V, with absolute maximum rating up to 38 V for short-term transients. This allows direct integration into 24 V and 36 V industrial power systems without external voltage regulation - confirmed in Section 6.1 of the TI SLCS006Z datasheet.

Does LM339NE3 have rail-to-rail input capability?

Yes, the LM339NE3 features a common-mode input voltage range that includes ground and extends to V_CC − 2 V, enabling true rail-to-rail operation from a single supply. This eliminates the need for input biasing networks in most sensor interface applications - verified in Table 6-7 and Section 6.4 of the official datasheet.

Can LM339NE3 outputs drive LEDs directly?

Yes, each open-collector output of the LM339NE3 can sink up to 21 mA at V_OL = 1.5 V, sufficient to drive standard indicator LEDs with an appropriate series resistor. The output voltage drop remains ≤400 mV at 4 mA, ensuring reliable logic LOW assertion - per Electrical Characteristics Table 6-7.

What is the temperature range specification for LM339NE3?

The LM339NE3 is rated for operation from −40°C to +85°C ambient temperature, matching the LM339 commercial-grade specification. This range is validated across all key parameters including offset voltage, propagation delay, and supply current - as defined in Section 6.5 and Table 6-1 of the TI datasheet.

Is LM339NE3 pin-compatible with LM339B?

Yes, LM339NE3 and LM339B share identical 14-pin PDIP pinout and terminal functions. The LM339B is explicitly documented as a drop-in replacement offering improved offset voltage, ESD rating, and response time - per Feature section and Family Comparison Table in SLCS006Z.

LM339NE3 Specifications

Product attributes: Attribute value

Manufacturer:: Texas Instruments

Package/Case:: 14-DIP (0.300", 7.62mm)

Series:: -

Packaging:: Tube

Product Status:: Active

Type:: General Purpose

Number of Elements:: 4

Output Type:: Open-Collector

Voltage - Supply, Single/Dual (±):: 2V ~ 30V, ±1V ~ 15V

:: 5mV @ 30V

Voltage - Input Offset (Max):: 0.25µA @ 5V

Current - Input Bias (Max):: 20mA

Current - Output (Typ):: 2.5mA

Current - Quiescent (Max):: -

CMRR, PSRR (Typ):: -

Propagation Delay (Max):: -

Hysteresis:: 0°C ~ 70°C

Operating Temperature:: -

Grade:: -

Qualification:: Through Hole

:: 14-PDIP

LM339NE3 FAQ

1.How can I place an order for LM339NE3 through Aetrix?

Please submit a Request for Quotation (RFQ) for LM339NE3 on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.

2.Are the price and stock information for LM339NE3 reliable?

The price and inventory of LM339NE3 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM339NE3 is usually 5 days.

3.What payment methods are accepted for LM339NE3?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM339NE3 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for LM339NE3?

LM339NE3 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your LM339NE3 order is processed, you will receive an email with the shipment details and tracking number.

Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.

5.How can I obtain technical support or documentation for LM339NE3?

For technical support, including LM339NE3 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM339NE3 requirements.

6.How does Aetrix verify that LM339NE3 is sourced from the original manufacturer or authorized distributors?

All LM339NE3 products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that LM339NE3 meets industry standards.

7.What is the process for return or replacement of LM339NE3?

All LM339NE3 units undergo pre-shipment inspection (PSI). If there is an issue with LM339NE3, returns or replacements are accepted under the following conditions:

1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.

2.The issue is reported within 90 days of delivery.

3.The LM339NE3 part is unused and in its original packaging.

Return procedure for LM339NE3:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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