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Texas Instruments LM339PWG4
- Part No.:
- LM339PWG4
- Manufacturer:
- Texas Instruments
- Category:
- Comparators
- Package:
- 14-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
LM339PWG4.pdf
- Description:
- IC COMPARATOR 4 DIFF 14TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,402
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Product details
Overview
LM339PWG4 from Texas Instruments is a quad differential comparator IC designed for precision voltage comparison in single-supply systems. It features 0.37 mV typical input offset voltage, 200 µA per comparator supply current, 1 µs response time, ±38 V differential input range, and operates from 2 V to 36 V. It is used in server PSU overvoltage protection circuits where rail monitoring and fast fault detection are critical.
For engineers reviewing the LM339PWG4 datasheet, LM339PWG4 pinout, LM339PWG4 application, or LM339PWG4 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 functional trade-offs.
Technical Context
The LM339PWG4 implements four independent open-collector comparators with rail-to-rail common-mode input range extending to ground and up to VCC − 2 V. Its internal architecture includes ESD-hardened input clamps (2 kV HBM), enabling robust operation in noisy industrial environments without external protection.
It supports TTL, MOS, and CMOS-compatible outputs via external pull-up resistors, and its quiescent current remains stable across 2–36 V supply range - making it suitable for wide-input-voltage DC/DC monitoring and battery-powered control logic.
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, 24 V, and 36 V power rails without level-shifting. |
| Input Offset Voltage (typ) | ±0.37 mV - ensures high-accuracy threshold detection in precision sensing applications like battery cell balancing. |
| Response Time (typ) | 1 µs - provides fast fault response for overvoltage/undervoltage shutdown in server PSUs and motor drives. |
| Differential Input Range | ±38 V - allows direct comparison of signals referenced to different potentials, e.g., phase-to-phase voltages in AC-DC converters. |
| Input Bias Current (typ) | 3.5 nA - minimizes loading on high-impedance sensor sources such as thermistor or photodiode networks. |
| Output Type | Open-collector - permits wired-OR logic, flexible voltage-level translation, and direct interface with microcontroller interrupt inputs. |
| ESD Rating (HBM) | 2 kV - meets industrial handling requirements without additional board-level ESD protection circuitry. |
Pinout & Package
LM339PWG4 is packaged in a 14-pin SOIC (PW) with nominal body size 8.70 mm × 3.90 mm, surface-mount compatible, and RoHS-compliant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (OUT1) | Comparator 1 output | Open-collector output requiring external pull-up; sinks current when comparator trips. |
| 2 (OUT2) | Comparator 2 output | Independent open-collector output; supports parallel or cascaded logic decisions. |
| 3 (VCC) | Positive supply | Single supply input; powers all four comparators; accepts 2–36 V DC. |
| 4 (IN2–) | Comp 1 inverting input | Negative reference input for comparator 1; part of differential pair with Pin 5. |
| 5 (IN2+) | Comp 1 non-inverting input | Signal input for comparator 1; common-mode range includes ground and extends to VCC − 2 V. |
| 6 (IN1–) | Comp 2 inverting input | Negative reference input for comparator 2; electrically identical to Pin 4 but for channel 2. |
| 7 (IN1+) | Comp 2 non-inverting input | Signal input for comparator 2; supports rail-to-rail input operation. |
| 8 (IN3–) | Comp 3 inverting input | Third comparator's negative input; enables multi-threshold monitoring (e.g., UV/OV/warning). |
| 9 (IN3+) | Comp 3 non-inverting input | Third comparator's signal input; fully independent of other channels. |
| 10 (IN4–) | Comp 4 inverting input | Fourth comparator input; allows full quad functionality for complex state machines or redundancy. |
| 11 (IN4+) | Comp 4 non-inverting input | Final signal input; supports independent voltage window detection or sequencing logic. |
| 12 (GND) | Ground reference | Return path for supply and inputs; must be low-impedance for stable common-mode rejection. |
| 13 (OUT4) | Comparator 4 output | Open-collector output; shares same electrical behavior as Pins 1 and 2. |
| 14 (OUT3) | Comparator 3 output | Third open-collector output; enables simultaneous status reporting across four thresholds. |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail input common-mode range | Includes ground and extends to VCC − 2 V - eliminates need for input biasing in single-supply designs. |
| Low quiescent current (200 µA per comparator) | Reduces standby power in always-on monitoring circuits, e.g., battery backup supervisors. |
| 2 kV HBM ESD rating | Enables reliable assembly and field operation in unshielded industrial enclosures without added protection diodes. |
| 1 µs propagation delay | Supports sub-millisecond fault response in safety-critical power systems like UPS and server PSUs. |
| Open-collector outputs with 25 mA sink capability | Allows direct drive of LEDs, relays, or microcontroller interrupts using standard pull-up resistors. |
Applications
| Server Power Supply Monitoring | Vacuum Robot Safety Interlock |
|---|---|
Use Scenario: Real-time monitoring of +12 V, +5 V, +3.3 V, and -12 V rails in redundant server PSUs to trigger immediate shutdown on overvoltage or undervoltage events. IC Role / Device Role / Timing Role: Quad comparator performs independent voltage window comparisons with dedicated thresholds per rail; outputs feed OR-gated fault latch. Use Value: Prevents catastrophic damage to CPUs, memory, and storage by detecting out-of-spec conditions within 1 µs and asserting hardware reset before regulation failure propagates. | Use Scenario: Verifying vacuum chamber pressure, motor temperature, emergency stop button status, and door interlock before initiating robot motion sequence. IC Role / Device Role / Timing Role: LM339PWG4 acts as deterministic safety logic unit - each comparator validates one hardwired sensor condition before enabling motion controller enable line. Use Value: Meets IEC 61508 SIL-2 requirements via discrete analog voting logic, eliminating reliance on software-based safety monitors. |
| Single-Phase UPS Battery Management | Factory Automation Sensor Hub |
Use Scenario: Monitoring battery voltage, inverter output waveform zero-crossing, charger status, and thermal cutoff in line-interactive UPS units. IC Role / Device Role / Timing Role: Comparator 1–2 detect battery charge/discharge thresholds; Comparator 3 detects AC zero-crossing for synchronized switching; Comparator 4 monitors thermal sensor voltage. Use Value: Enables seamless transfer between utility and battery modes with <100 µs latency, while preventing deep discharge or thermal runaway. | Use Scenario: Aggregating analog signals from four independent 4–20 mA current-loop sensors (flow, pressure, temp, level) in PLC-connected machinery. IC Role / Device Role / Timing Role: Each comparator compares scaled sensor output against fixed trip points to generate discrete alarm flags for local HMI or remote SCADA. Use Value: Replaces four separate comparator ICs with one SOIC-14 device, reducing BOM count, PCB area, and calibration complexity. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar quad differential comparator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM2901BDR | Same B-version silicon, wider operating temperature range (−40°C to +125°C) vs. LM339PWG4 (−40°C to +85°C); identical SOIC-14 package and pinout. | Better suited for under-hood automotive or high-ambient industrial environments where extended temperature stability is required. | Select LM2901BDR when ambient temperature exceeds 85°C or AEC-Q100 qualification is needed (e.g., LM2901B-Q1 variant). |
| TL331BIDBVR | Single-channel B-version comparator in SOT-23-5; lower quiescent current (55 µA), faster response (0.3 µs), but requires four units for quad functionality. | Preferred for space-constrained, ultra-low-power designs where layout flexibility and individual channel enable/disable matter more than integration. | Choose TL331BIDBVR only when board area is severely limited and discrete channel control justifies higher component count and routing overhead. |
Compared with LM2901BDR, LM339PWG4 offers lower cost and sufficient thermal margin for commercial/industrial power supplies; compared with TL331BIDBVR, it delivers integrated quad functionality with predictable timing correlation and reduced assembly risk - critical for deterministic fault-response systems.
Availability
LM339PWG4 is available at Aetrix Electronics and suitable for server PSU monitoring, vacuum robot safety interlocks, single-phase UPS battery management, and factory automation sensor hubs requiring stable component supply across long production lifecycles.
Supply support for LM339PWG4 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 communications markets.
The LM339 family was engineered as a foundational quad comparator platform for cost-sensitive, high-reliability voltage monitoring - prioritizing robustness, wide supply range, and interoperability across decades of legacy and next-generation systems.
FAQ
What is the maximum supply voltage rating for LM339PWG4?
The LM339PWG4 has an absolute maximum supply voltage of 38 V, with recommended operating range from 2 V to 36 V. This allows direct use in 24 V industrial control systems and 36 V battery-powered equipment without external regulators or voltage dividers.
Does LM339PWG4 support rail-to-rail input operation?
Yes, the LM339PWG4 supports rail-to-rail common-mode input voltage range, including ground and extending up to VCC − 2 V. This enables direct interfacing with sensors and signals referenced to system ground or intermediate supply nodes without level-shifting circuitry.
Can LM339PWG4 outputs drive a 5 V microcontroller GPIO directly?
No - LM339PWG4 outputs are open-collector and require an external pull-up resistor to the target logic voltage (e.g., 5 V). When pulled up to 5 V, the output can safely interface with 5 V-tolerant GPIO pins and assert active-low interrupt signals without level translators.
What is the typical input offset voltage of LM339PWG4 over temperature?
The LM339PWG4 has a typical input offset voltage of ±0.37 mV at 25°C, with a maximum of ±5.5 mV over its full operating range of −40°C to +85°C. This stability ensures consistent trip-point accuracy across environmental variations in industrial deployments.
Is LM339PWG4 pin-compatible with legacy LM339 variants?
Yes - LM339PWG4 is a B-version device and serves as a drop-in replacement for LM339, LM239, and LM2901 in SOIC-14 packages. It retains identical pinout, electrical interface, and footprint while improving offset voltage, ESD rating, and response time.
LM339PWG4 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
LM339PWG4 FAQ
1.How can I place an order for LM339PWG4 through Aetrix?
Please submit a Request for Quotation (RFQ) for LM339PWG4 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 LM339PWG4 reliable?
The price and inventory of LM339PWG4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM339PWG4 is usually 5 days.
3.What payment methods are accepted for LM339PWG4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM339PWG4 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM339PWG4?
LM339PWG4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM339PWG4 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 LM339PWG4?
For technical support, including LM339PWG4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM339PWG4 requirements.
6.How does Aetrix verify that LM339PWG4 is sourced from the original manufacturer or authorized distributors?
All LM339PWG4 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 LM339PWG4 meets industry standards.
7.What is the process for return or replacement of LM339PWG4?
All LM339PWG4 units undergo pre-shipment inspection (PSI). If there is an issue with LM339PWG4, 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 LM339PWG4 part is unused and in its original packaging.
Return procedure for LM339PWG4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LM339PWG4 Tags
-
LM2903DR
Texas Instruments
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LM339DR
Texas Instruments
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LM339PWR
Texas Instruments
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LM393DT
STMicroelectronics
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LM2901PWR
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LM2903DT
STMicroelectronics
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LM393DR
Texas Instruments
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LM239DR
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LM339APWR
Texas Instruments
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LM2903P
Texas Instruments
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LM393ADR
Texas Instruments
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NCX2200GMAZ
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