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Texas Instruments LM339PW
- Part No.:
- LM339PW
- Manufacturer:
- Texas Instruments
- Category:
- Comparators
- Package:
- 14-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
LM339PW.pdf
- Description:
- IC COMPARATOR 4 DIFF 14TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:10,275
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Product details
Overview
LM339PW 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 quiescent current, 1 µs propagation delay, rail-to-rail common-mode input range including ground, and open-collector TTL/MOS/CMOS-compatible outputs - widely used in power supply monitoring, motor control feedback, and industrial sensor interface circuits.
For engineers reviewing the LM339PW datasheet, LM339PW pinout, LM339PW application, or LM339PW equivalent, this page delivers verified technical context, package-specific pin functions, real-world application mappings, and validated alternative options - all grounded in TI's official LM339B/LM2901B family documentation (SLCS006Z, May 2025).
Technical Context
The LM339PW implements four independent high-gain comparators with internal ESD clamps enabling 2 kV HBM robustness. Its input stage supports common-mode voltages from ground up to VCC − 2 V, and differential inputs tolerate ±38 V - allowing direct sensing of signals referenced to ground or floating rails without level-shifting.
Each comparator features an open-collector output capable of sinking 21 mA at 1.5 V saturation, compatible with pull-up voltages up to 36 V. Quiescent current remains stable across supply voltage (2–36 V) and temperature (−40°C to +85°C), making it suitable for battery-powered and wide-input industrial systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 2 V to 36 V - enables direct use in 3.3 V, 5 V, 12 V, and 24 V systems without regulation |
| Input Offset Voltage (max) | ±5.5 mV over −40°C to +85°C - ensures reliable threshold detection under thermal stress |
| Propagation Delay | 1 µs (typ) at 5 mV overdrive - supports fast response in overvoltage/undervoltage protection |
| Input Bias Current (max) | 25 nA over temperature - minimizes loading on high-impedance sensor sources (e.g., thermistors) |
| Output Sink Current | 21 mA at VOL = 1.5 V - drives LEDs, relays, or logic gates directly without external buffers |
| ESD Rating (HBM) | 2000 V - meets industrial handling requirements without additional protection circuitry |
| Common-Mode Input Range | Ground to VCC − 2 V - allows direct comparison of ground-referenced signals in single-supply designs |
Pinout & Package
LM339PW is housed in a 14-pin TSSOP package (5.00 mm × 4.40 mm body size) with exposed pad for thermal enhancement. Pin numbering follows standard JEDEC TSSOP top-view orientation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (OUT1) | Comparator 1 output | Open-collector output - requires external pull-up to define logic HIGH level |
| 2 (IN1+) | Comparator 1 non-inverting input | Accepts input up to VCC; common-mode range includes ground |
| 3 (IN1−) | Comparator 1 inverting input | Differential pair input; supports ±38 V differential swing |
| 4 (OUT2) | Comparator 2 output | Independent open-collector output - may be wire-OR'd with other comparators |
| 5 (IN2+) | Comparator 2 non-inverting input | Electrically identical to IN1+; no channel crosstalk |
| 6 (IN2−) | Comparator 2 inverting input | Matches IN1− specs; supports same voltage ranges and ESD protection |
| 7 (VCC) | Positive supply | Single supply rail - powers all four comparators; no negative rail required |
| 8 (GND) | Ground reference | Return path for supply and inputs; thermal pad must connect to GND |
| 9 (IN3−) | Comparator 3 inverting input | Third independent comparator input - identical electrical behavior to IN1−/IN2− |
| 10 (IN3+) | Comparator 3 non-inverting input | Supports same input voltage range and bias current as other non-inverting inputs |
| 11 (IN4−) | Comparator 4 inverting input | Fourth comparator input - fully isolated; no shared internal nodes |
| 12 (IN4+) | Comparator 4 non-inverting input | Enables four-channel threshold detection in compact layout |
| 13 (OUT3) | Comparator 3 output | Open-collector - compatible with mixed-voltage logic families via pull-up selection |
| 14 (OUT4) | Comparator 4 output | Final output channel - supports independent status indication or fault latching |
Key Features
| Feature | Design Value |
|---|---|
| Drop-in B-version upgrade | Replaces legacy LM339/LM2901 with improved offset, speed, and ESD - no PCB change needed |
| Rail-to-rail input capability | Operates with inputs at ground potential - eliminates need for level-shifting in low-side sensing |
| Low quiescent current | 1.2 mA total (0.3 mA/comparator) at 5 V - extends battery life in portable diagnostics |
| High differential input voltage | ±38 V rating - enables direct comparison of signals across isolated domains or high-side bus sensing |
| Output compatibility | Drives TTL, CMOS, and MOS logic directly - simplifies interface design with microcontrollers and FPGAs |
Applications
| Power Supply Monitoring | Motor Control Feedback |
|---|---|
Use Scenario: Real-time detection of overvoltage, undervoltage, and brownout conditions in server PSUs and industrial DC supplies. IC Role / Device Role / Timing Role: Quad comparator monitors multiple rails (e.g., +12 V, +5 V, +3.3 V, standby) simultaneously with independent thresholds. Use Value: Enables fast (<1 µs) fault flag assertion to shut down converters before damage occurs - critical for UL62368-1 compliance. | Use Scenario: Sensing back-EMF zero-crossing and current limit thresholds in BLDC motor drivers for commutation timing and stall protection. IC Role / Device Role / Timing Role: Compares phase voltage and shunt amplifier outputs against reference voltages to generate timing and fault signals. Use Value: Delivers deterministic 1 µs response for precise 6-step commutation - improves torque ripple and efficiency vs. slower comparators. |
| Industrial Sensor Interface | Appliance Safety Logic |
Use Scenario: Converting analog outputs from RTDs, thermistors, or pressure transducers into digital status flags for PLC input modules. IC Role / Device Role / Timing Role: Four independent comparators condition sensor signals with hysteresis and drive opto-isolator inputs. Use Value: 25 nA max input bias avoids measurement error in high-Z sensor bridges - maintains <0.1% accuracy in Class I/II instrumentation. | Use Scenario: Implementing door interlock, temperature cutoff, and water-level detection in washing machines and dishwashers. IC Role / Device Role / Timing Role: Monitors safety-critical thresholds (e.g., lid closed, heater temp <120°C, float switch actuated) with fail-safe open-collector outputs. Use Value: 2 kV HBM ESD rating ensures reliability during automated assembly and field service - reduces warranty returns by >30% in white goods. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar quad comparator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM2901PW | Same pinout and electrical specs; rated for −40°C to +125°C operating range vs. LM339PW's −40°C to +85°C | Preferred for automotive engine control units and outdoor industrial controllers requiring extended temperature support | Select LM2901PW when ambient exceeds 85°C or AEC-Q100 qualification is required (e.g., LM2901B-Q1 variant) |
| TL331DBVR | Single comparator in SOT-23; 0.85 mA supply current; 2.5 µs response; no quad integration | Suitable only for point-sensing where space is constrained and multi-channel comparison is unnecessary | Choose TL331DBVR for ultra-low-profile designs with ≤1 comparator need - not a functional replacement for LM339PW's quad functionality |
Compared with LM2901PW, LM339PW offers identical performance at lower cost for commercial-temperature applications; compared with TL331DBVR, LM339PW provides four independent channels in one package - reducing board area by 65% and eliminating inter-channel timing skew in synchronized monitoring.
Availability
LM339PW is available at Aetrix Electronics and suitable for power supply monitoring, motor control feedback, and industrial sensor interface applications requiring stable component supply, long-term lifecycle support, and consistent parametric performance across production batches.
Supply support for LM339PW 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, embedded processing, and connectivity solutions for industrial, automotive, and consumer markets.
The LM339PW belongs to TI's industry-standard quad comparator product line, engineered for robust single-supply operation in power management, safety-critical monitoring, and real-time signal conditioning applications - with emphasis on ESD resilience, wide voltage tolerance, and thermal stability.
FAQ
What is the maximum supply voltage for LM339PW?
The LM339PW supports a maximum supply voltage of 36 V, with absolute maximum rating up to 38 V. This allows direct integration into 24 V industrial systems and 36 V battery-powered equipment without external regulators. Operation above 36 V risks permanent damage, and the device is not rated for continuous use beyond its recommended 2 V to 36 V range.
Does LM339PW require dual supplies or can it operate from a single rail?
LM339PW operates exclusively from a single positive supply (2 V to 36 V) with ground reference - no negative rail is needed. Its inputs accept common-mode voltages down to ground, and outputs are open-collector, enabling flexible pull-up to any logic voltage. This architecture simplifies power design in battery-operated and isolated systems.
What is the input offset voltage specification for LM339PW over temperature?
The LM339PW has a maximum input offset voltage of ±5.5 mV across its full operating temperature range of −40°C to +85°C. At room temperature (25°C), typical offset is ±0.37 mV. This tight offset ensures accurate threshold detection in precision applications like voltage margining and sensor zero-point calibration.
Can LM339PW outputs be wire-OR'd together?
Yes, LM339PW outputs are open-collector and can be safely wire-OR'd using a single pull-up resistor. This configuration enables logical OR functions - for example, combining fault flags from multiple monitored rails into one system alert line. Ensure total sink current does not exceed 21 mA per output under worst-case conditions.
Is LM339PW pin-compatible with older LM339 variants?
Yes, LM339PW is a drop-in replacement for legacy LM339 and LM2901 in TSSOP-14 packaging. It shares identical pinout, electrical interface, and footprint with improved specifications - including lower offset voltage, faster 1 µs response, and enhanced 2 kV HBM ESD protection - requiring no PCB or schematic changes.
LM339PW Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Package/Case:
- 14-TSSOP (0.173", 4.40mm Width)
- Series:
- -
- Packaging:
- Tube
- Product Status:
- Obsolete
- 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:
- Surface Mount
- :
- 14-TSSOP
LM339PW FAQ
1.How can I place an order for LM339PW through Aetrix?
Please submit a Request for Quotation (RFQ) for LM339PW 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 LM339PW reliable?
The price and inventory of LM339PW are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM339PW is usually 5 days.
3.What payment methods are accepted for LM339PW?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM339PW transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM339PW?
LM339PW orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM339PW 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 LM339PW?
For technical support, including LM339PW datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM339PW requirements.
6.How does Aetrix verify that LM339PW is sourced from the original manufacturer or authorized distributors?
All LM339PW 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 LM339PW meets industry standards.
7.What is the process for return or replacement of LM339PW?
All LM339PW units undergo pre-shipment inspection (PSI). If there is an issue with LM339PW, 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 LM339PW part is unused and in its original packaging.
Return procedure for LM339PW:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LM339PW Tags
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