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Texas Instruments LM339ANSR
- Part No.:
- LM339ANSR
- Manufacturer:
- Texas Instruments
- Category:
- Comparators
- Package:
- 14-SOIC (0.209", 5.30mm Width)
- Datasheet:
-
LM339ANSR.pdf
- Description:
- IC COMPARATOR 4 DIFF 14SO
- Quantity:
- Payment:
- Shipping:
Inventory:3,116
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Product details
Overview
LM339ANSR 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 supply current, and rail-to-rail common-mode input range including ground - widely deployed in server PSU overvoltage protection circuits.
For engineers reviewing the LM339ANSR datasheet, LM339ANSR pinout, LM339ANSR application, or LM339ANSR equivalent, this page delivers verified electrical specs, SOIC-14 package mapping, real-world use cases in industrial power monitoring, and validated drop-in alternatives with documented functional and thermal differences.
Technical Context
The LM339ANSR implements four independent open-collector comparators with internal ESD clamps (2 kV HBM), enabling robust operation in noisy industrial environments. Its input stage supports differential voltages up to ±38 V and common-mode inputs down to ground, while maintaining low quiescent current independent of supply voltage.
Each comparator features TTL/MOS/CMOS-compatible output sinking capability up to 21 mA, with low saturation voltage (≤400 mV at 4 mA) and guaranteed operation from –40°C to +85°C - matching the LM339B specification set per TI SLCS006Z (May 2025).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 2 V to 36 V - enables direct integration into 3.3 V, 5 V, 12 V, and 24 V industrial power rails without level-shifting. |
| Input Offset Voltage (max) | ±5.5 mV over temperature - ensures accurate threshold detection in precision voltage monitoring applications. |
| Propagation Delay | 1 µs typical (TTL input) - supports fast response in overcurrent and fault-detection loops. |
| Quiescent Current | 0.8–1.2 mA total (all four comparators) - minimizes standby power in always-on monitoring systems. |
| Input Bias Current (typ) | 3.5 nA - reduces loading error on high-impedance sensor signal paths (e.g., thermistor dividers). |
| Output Sink Current | 21 mA per channel - drives standard LEDs, optocouplers, or logic-level MOSFET gates directly. |
| ESD Rating (HBM) | 2000 V - meets industrial IEC 61000-4-2 system-level ESD immunity requirements without external protection. |
Pinout & Package
LM339ANSR 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. Thermal performance: RθJA = 96.2°C/W.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (OUT1) | Comparator 1 output | Open-collector NPN output - requires external pull-up; sinks up to 21 mA for direct logic interfacing. |
| 2 (OUT2) | Comparator 2 output | Independent open-collector output - enables parallel or wired-OR logic configurations. |
| 3 (VCC) | Positive supply | Single positive rail input (2–36 V); no negative supply required - simplifies board power architecture. |
| 4 (IN2–) | Comparator 1 inverting input | Differential input referenced to IN2+; accepts voltages from GND to VCC – 2 V. |
| 5 (IN2+) | Comparator 1 non-inverting input | Accepts same common-mode range as IN2–; enables flexible reference or signal routing. |
| 6 (IN1–) | Comparator 2 inverting input | Electrically identical to IN2–; pin naming follows TI's channel numbering convention. |
| 7 (IN1+) | Comparator 2 non-inverting input | Paired with IN1–; supports dual-threshold or window-comparator topologies. |
| 8 (IN3–) | Comparator 3 inverting input | Third independent comparator input - used for auxiliary monitoring (e.g., fan tach feedback). |
| 9 (IN3+) | Comparator 3 non-inverting input | Enables simultaneous monitoring of multiple voltage rails or sensor outputs. |
| 10 (IN4–) | Comparator 4 inverting input | Fourth channel input - commonly assigned to system reset or brownout detection. |
| 11 (IN4+) | Comparator 4 non-inverting input | Provides full quad functionality without external components - reduces BOM count. |
| 12 (GND) | Negative supply / reference | System ground return; all inputs referenced to this node - critical for noise rejection. |
| 13 (OUT4) | Comparator 4 output | Final open-collector output - configurable as fault latch or status indicator. |
| 14 (OUT3) | Comparator 3 output | Supports redundant monitoring or cascaded logic decisions in safety-critical subsystems. |
Key Features
| Feature | Design Value |
|---|---|
| Drop-in B-version upgrade | Replaces legacy LM339/LM239 with improved offset, speed, and ESD - no PCB or firmware changes needed. |
| Rail-to-rail common-mode input | Operates with inputs at GND or up to VCC – 2 V - eliminates need for input biasing networks in single-supply designs. |
| Wide supply range (2–36 V) | Supports 3.3 V microcontrollers and 24 V industrial buses in same design - reduces variant proliferation. |
| Low 3.5 nA input bias current | Minimizes error in high-impedance divider-based sensing (e.g., battery voltage monitoring with >1 MΩ resistors). |
| 1 µs TTL-compatible response | Meets real-time fault response requirements in UPS and motor drive protection circuits. |
| 2 kV HBM ESD rating | Withstands handling and board-level transients without external TVS diodes - lowers system cost and layout complexity. |
Applications
| Server Power Supply Monitoring | Vacuum Robot Safety Interlock |
|---|---|
|
Use Scenario: Real-time monitoring of +12 V, +5 V, and +3.3 V rails in 1U server PSUs for overvoltage and undervoltage lockout. IC Role / Device Role / Timing Role: Quad comparator performs independent voltage window checks with dedicated outputs driving PMBus fault lines. Use Value: Enables sub-1 µs fault detection and isolation, meeting Intel VR14/VR15 spec requirements for transient response. |
Use Scenario: Verifying vacuum chamber pressure, motor encoder position, and emergency stop button status before motion initiation. IC Role / Device Role / Timing Role: LM339ANSR compares analog sensor outputs against fixed thresholds; outputs feed FPGA safety logic. Use Value: Guarantees <10 µs end-to-end decision latency from sensor input to motion inhibit assertion - critical for ISO 13849 PLd compliance. |
| Industrial Cordless Power Tool Battery Management | Factory Automation Sensor Interface |
|
Use Scenario: Monitoring cell voltage imbalance, pack temperature, and charge/discharge current in 18 V Li-ion battery packs. IC Role / Device Role / Timing Role: Four comparators implement cell overvoltage, undervoltage, thermal cutoff, and current-limit flags. Use Value: 3.5 nA input bias avoids loading 10 MΩ thermistor networks; 21 mA sink drives LED indicators directly. |
Use Scenario: Converting analog 4–20 mA loop signals from pressure, flow, and level sensors into digital presence/absence alerts. IC Role / Device Role / Timing Role: LM339ANSR acts as programmable threshold detector with adjustable hysteresis via external resistors. Use Value: Single-supply operation eliminates isolated power for sensor front-ends; SOIC-14 fits compact DIN-rail I/O modules. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar quad comparator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM339BDR | Same SOIC-14 package, identical electrical specs (±0.37 mV offset, 1 µs delay), but rated for –40°C to +85°C - matches LM339ANSR temp grade exactly. | No functional difference; LM339BDR is TI's standard-orderable B-version part number with identical qualification and traceability. | Select LM339BDR when requiring TI's latest production revision (SLCS006Z) and full automotive-grade process controls. |
| LM2901BDR | Identical core specs but extended temperature range (–40°C to +125°C); otherwise pin-, package-, and function-compatible. | Suitable for under-hood automotive or high-temp industrial enclosures where ambient exceeds 85°C. | Choose LM2901BDR only if operating above 85°C is required; otherwise LM339ANSR or LM339BDR provides optimal cost/performance balance. |
Compared with LM339BDR and LM2901BDR, LM339ANSR shares identical SOIC-14 pinout and B-version electrical performance but carries TI's legacy NS package designation - ensuring full compatibility while supporting long-term industrial BOM continuity.
Availability
LM339ANSR is available at Aetrix Electronics and suitable for server PSU monitoring, vacuum robot safety interlocks, and cordless power tool battery management requiring stable component supply across multi-year production cycles.
Supply support for LM339ANSR 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 specializing in analog and embedded processing technologies, with over 50 years of comparator innovation and broad industrial qualification.
The LM339 family - including LM339ANSR - was engineered for robust, low-cost voltage comparison in harsh industrial and computing power systems, emphasizing single-supply flexibility, ESD resilience, and long-term manufacturability.
FAQ
What is the maximum supply voltage for LM339ANSR?
The LM339ANSR supports an absolute maximum supply voltage of 38 V, with recommended operation from 2 V to 36 V. This wide range allows direct use with 24 V industrial buses and 36 V battery systems without regulation - confirmed in Section 6.1 of TI's SLCS006Z datasheet (May 2025). Exceeding 38 V risks permanent damage.
Does LM339ANSR require a negative supply rail?
No, LM339ANSR operates from a single positive supply (2–36 V) with inputs referenced to ground. Its common-mode input range extends to GND, and outputs are open-collector - eliminating need for dual supplies. This is explicitly stated in the "Description" and "Recommended Operating Conditions" sections of the official datasheet.
What is the input offset voltage specification for LM339ANSR?
The LM339ANSR has a typical input offset voltage of ±0.37 mV at 25°C and a maximum of ±5.5 mV over its full operating temperature range (–40°C to +85°C), per Section 6.7 of TI's SLCS006Z datasheet. This value is measured across all four comparators and applies to both DC and slow-varying signals.
Can LM339ANSR drive a standard LED directly?
Yes - each LM339ANSR output can sink up to 21 mA with ≤400 mV saturation voltage at 4 mA, sufficient to drive standard 2 mA–20 mA indicator LEDs using a series resistor. The open-collector architecture requires an external pull-up to VCC or another logic rail, as detailed in Figure 8-2 of the datasheet.
Is LM339ANSR pin-compatible with older LM339 variants?
Yes - LM339ANSR uses the standard 14-pin SOIC (NS) footprint and identical pinout to LM339, LM239, and LM2901 devices. It is a drop-in replacement per TI's documentation, retaining full functional and mechanical compatibility while delivering B-version improvements in offset, speed, and ESD robustness.
LM339ANSR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Package/Case:
- 14-SOIC (0.209", 5.30mm Width)
- Series:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- General Purpose
- Number of Elements:
- 4
- Output Type:
- Open-Collector
- Voltage - Supply, Single/Dual (±):
- 2V ~ 30V, ±1V ~ 15V
- :
- 3mV @ 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:
- Surface Mount
- :
- 14-SO
LM339ANSR FAQ
1.How can I place an order for LM339ANSR through Aetrix?
Please submit a Request for Quotation (RFQ) for LM339ANSR 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 LM339ANSR reliable?
The price and inventory of LM339ANSR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM339ANSR is usually 5 days.
3.What payment methods are accepted for LM339ANSR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM339ANSR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM339ANSR?
LM339ANSR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM339ANSR 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 LM339ANSR?
For technical support, including LM339ANSR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM339ANSR requirements.
6.How does Aetrix verify that LM339ANSR is sourced from the original manufacturer or authorized distributors?
All LM339ANSR 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 LM339ANSR meets industry standards.
7.What is the process for return or replacement of LM339ANSR?
All LM339ANSR units undergo pre-shipment inspection (PSI). If there is an issue with LM339ANSR, 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 LM339ANSR part is unused and in its original packaging.
Return procedure for LM339ANSR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LM339ANSR Tags
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