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Texas Instruments LM339NS
- Part No.:
- LM339NS
- Manufacturer:
- Texas Instruments
- Category:
- Comparators
- Package:
- 14-SOIC (0.209", 5.30mm Width)
- Datasheet:
-
LM339NS.pdf
- Description:
- PROTOTYPE
- Quantity:
- Payment:
- Shipping:
Inventory:1,158
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Product details
Overview
LM339NS 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, 200 µA per comparator supply current, 1 µs response time, and rail-to-rail common-mode input range including ground-used in server PSU overvoltage detection and motor drive fault monitoring.
For engineers reviewing the LM339NS datasheet, LM339NS pinout, LM339NS application, or LM339NS equivalent, this page delivers verified electrical specs, SOIC-14 package details, real-world use cases in industrial power systems, and two validated alternative parts with documented functional trade-offs.
Technical Context
The LM339NS implements four independent open-collector comparators with input stages tolerant of differential voltages up to ±38 V and common-mode inputs extending to VCC – 2 V. Its architecture supports direct interfacing with TTL, MOS, and CMOS logic via pull-up resistors on output pins.
It operates over –40°C to +85°C ambient temperature, draws quiescent current independent of supply voltage (0.8–1.2 mA total), and integrates dedicated ESD clamps delivering 2 kV HBM robustness-enabling reliable use in noisy factory automation environments without external protection.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 2 V to 36 V - supports wide-input industrial DC supplies without regulation |
| Input Offset Voltage (max) | ±5.5 mV over temperature - enables precise threshold detection in sensor interfaces |
| Response Time | 1 µs at 5 mV overdrive - suitable for fast fault-response circuits like UPS shutdown triggers |
| Input Bias Current (typ) | 3.5 nA - minimizes loading on high-impedance sources such as thermistor dividers |
| Output Type | Open-collector - allows wired-OR logic and level translation across mixed-voltage subsystems |
| ESD Rating (HBM) | 2000 V - meets IEC 61000-4-2 Level 2 for board-level handling in production |
| Operating Temperature | –40°C to +85°C - qualified for deployment in server PSUs and motor control enclosures |
Pinout & Package
LM339NS is supplied in a 14-pin SOIC (NS) package measuring 8.70 mm × 3.90 mm, with standard JEDEC MS-012AC footprint and gull-wing leads compatible with automated SMT assembly.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (OUT1) | Comparator 2 output | Open-collector drain; requires external pull-up for logic-high assertion |
| 2 (OUT2) | Comparator 1 output | Independent open-collector output; supports individual termination |
| 3 (VCC) | Positive supply | Single supply input; powers all four comparators and internal bias circuitry |
| 4 (IN2–) | Comparator 1 inverting input | Differential pair input; accepts signals down to –0.3 V below GND |
| 5 (IN2+) | Comparator 1 non-inverting input | Paired with Pin 4; defines comparator decision threshold |
| 6 (IN1–) | Comparator 2 inverting input | Electrically identical to Pin 4; channel naming follows TI convention |
| 7 (IN1+) | Comparator 2 non-inverting input | Paired with Pin 6; interchangeable with Pin 5 in layout |
| 8 (IN3–) | Comparator 3 inverting input | Third comparator input; shares same input stage design as Pins 4/6 |
| 9 (IN3+) | Comparator 3 non-inverting input | Third comparator reference input; supports rail-to-rail common-mode |
| 10 (IN4–) | Comparator 4 inverting input | Final comparator input; validated for ±38 V differential stress |
| 11 (IN4+) | Comparator 4 non-inverting input | Final reference input; enables independent threshold setting per channel |
| 12 (GND) | Negative supply / reference | System ground return; must be low-impedance for stable common-mode rejection |
| 13 (OUT4) | Comparator 4 output | Fourth open-collector output; electrically isolated from other outputs |
| 14 (OUT3) | Comparator 3 output | Third output; supports discrete pull-up or shared bus configuration |
Key Features
| Feature | Design Value |
|---|---|
| Drop-in replacement for LM339/LM239 | Pin-compatible with legacy SOIC-14 footprints and identical signal routing |
| Rail-to-rail common-mode input range | Accepts inputs from GND to VCC – 2 V - eliminates need for level-shifting in single-supply designs |
| Low 0.37 mV input offset (typ) | Reduces false triggering in precision window comparators used in battery management |
| 2 kV HBM ESD rating | Enables direct handling in unshielded assembly lines without additional protection components |
| 1 µs propagation delay | Supports real-time overcurrent detection in motor drives with <10 µs fault-clearing requirements |
Applications
| Server Power Supply Monitoring | Vacuum Robot Safety Interlock |
|---|---|
Use Scenario: Detecting overvoltage and undervoltage conditions on +12 V and +5 V rails in redundant server PSUs. IC Role / Device Role / Timing Role: Quad comparator monitors four independent voltage thresholds with open-collector outputs tied to a shared fault bus. Use Value: Enables immediate shutdown via OR'd fault line when any rail exceeds ±5% tolerance, meeting IEC 62368-1 safety response timing. | Use Scenario: Validating vacuum pressure sensor output against dual thresholds to confirm chamber seal integrity before motion initiation. IC Role / Device Role / Timing Role: Two comparators form a window detector; third validates emergency stop signal; fourth monitors motor enable status. Use Value: Guarantees <100 µs response to loss-of-vacuum events, preventing robotic arm collision during rapid decompression. |
| Single-Phase UPS Transfer Control | Factory Automation Sensor Interface |
Use Scenario: Comparing AC line voltage zero-crossing and battery voltage to trigger seamless transfer between utility and backup power. IC Role / Device Role / Timing Role: One comparator detects zero-crossing via resistive divider; others monitor battery SOC and inverter output stability. Use Value: Achieves <2 ms transfer time by synchronizing switching with line phase, avoiding load dropout during grid failure. | Use Scenario: Conditioning analog outputs from temperature, flow, and proximity sensors in PLC I/O modules. IC Role / Device Role / Timing Role: Each comparator digitizes one sensor channel into high/low logic for microcontroller GPIO input. Use Value: Replaces ADC + firmware thresholding with deterministic hardware comparison, reducing MCU interrupt latency by >50 µs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar quad comparator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM339DR | Same SOIC-14 package; identical electrical specs but rated for 0°C to +70°C only | Limited to commercial-grade equipment; unsuitable for industrial enclosures exceeding 70°C ambient | Select LM339DR only for cost-sensitive consumer electronics where extended temperature is not required |
| LM2901DT | TSSOP-14 package (5.0 mm × 4.4 mm); same B-version specs including –40°C to +125°C operation | Smaller footprint enables denser PCB layouts; thermal resistance 136.6°C/W vs. LM339NS's 96.2°C/W | Choose LM2901DT when board space is constrained and higher junction temperature rise is acceptable |
Compared with LM339DR and LM2901DT, the LM339NS provides optimal balance of industrial temperature range, proven SOIC manufacturability, and thermal performance-making it preferred for server PSU and factory automation designs requiring long-term reliability at 85°C ambient.
Availability
LM339NS is available at Aetrix Electronics and suitable for server PSU monitoring, vacuum robot safety interlocks, and single-phase UPS transfer control requiring stable component supply across extended temperature ranges and multi-year production cycles.
Supply support for LM339NS 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 company specializing in analog and embedded processing technologies, with leadership in precision analog ICs and industrial-grade components.
The LM339NS belongs to TI's industry-standard quad comparator family, engineered for robust single-supply operation in power management, motor control, and safety-critical industrial systems.
FAQ
What is the maximum supply voltage rating for the LM339NS?
The LM339NS supports an absolute maximum supply voltage of 38 V, with recommended operating range from 2 V to 36 V. This 36 V upper limit enables direct interface with 24 V industrial control buses and 32 V battery systems without external regulators, while the 38 V margin accommodates transient spikes per IEC 61000-4-5.
Does the LM339NS require dual power supplies?
No, the LM339NS operates from a single supply ranging from 2 V to 36 V. Its input common-mode range includes ground and extends to VCC – 2 V, and its open-collector outputs interface directly with pull-up resistors to any logic rail-eliminating need for negative supplies in most industrial sensing applications.
What is the input offset voltage specification for LM339NS over temperature?
The LM339NS has a maximum input offset voltage of ±5.5 mV across its full operating temperature range of –40°C to +85°C. At 25°C, typical offset is ±0.37 mV, enabling accurate threshold detection in precision applications like battery cell voltage monitoring and temperature window comparators.
Can LM339NS outputs drive TTL logic directly?
Yes, LM339NS outputs are open-collector and fully compatible with TTL, MOS, and CMOS logic families. When pulled up to 5 V with a 5.1 kΩ resistor, the output saturates to ≤400 mV at 4 mA sink current-meeting TTL low-level input voltage (VIL) requirements-and supports wired-OR configurations for fault-bus architectures.
Is LM339NS pin-compatible with older LM339 variants?
Yes, the LM339NS is a drop-in replacement for LM339, LM239, and LM2901 in SOIC-14 (NS) packaging. It retains identical pinout, footprint, and electrical interface while improving offset voltage, supply current, response time, and ESD robustness-requiring no PCB or schematic changes for upgrade in existing designs.
LM339NS Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Package/Case:
- 14-SOIC (0.209", 5.30mm Width)
- 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 @ 5V
- Voltage - Input Offset (Max):
- 0.25µA @ 5V
- Current - Input Bias (Max):
- 16mA @ 5V
- Current - Output (Typ):
- 2mA
- Current - Quiescent (Max):
- -
- CMRR, PSRR (Typ):
- 300ns (Typ)
- Propagation Delay (Max):
- -
- Hysteresis:
- 0°C ~ 70°C
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- Surface Mount
- :
- 14-SO
LM339NS FAQ
1.How can I place an order for LM339NS through Aetrix?
Please submit a Request for Quotation (RFQ) for LM339NS 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 LM339NS reliable?
The price and inventory of LM339NS are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM339NS is usually 5 days.
3.What payment methods are accepted for LM339NS?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM339NS transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM339NS?
LM339NS orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM339NS 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 LM339NS?
For technical support, including LM339NS datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM339NS requirements.
6.How does Aetrix verify that LM339NS is sourced from the original manufacturer or authorized distributors?
All LM339NS 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 LM339NS meets industry standards.
7.What is the process for return or replacement of LM339NS?
All LM339NS units undergo pre-shipment inspection (PSI). If there is an issue with LM339NS, 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 LM339NS part is unused and in its original packaging.
Return procedure for LM339NS:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LM339NS Tags
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LM2903DR
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LM339DR
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LM339PWR
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LM393DT
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LM2901PWR
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LM2903DT
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LM393DR
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LM239DR
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LM339APWR
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LM2903P
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LM393ADR
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NCX2200GMAZ
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