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Texas Instruments LM239PWR
- Part No.:
- LM239PWR
- Manufacturer:
- Texas Instruments
- Category:
- Comparators
- Package:
- 14-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
LM239PWR.pdf
- Description:
- IC COMPARATOR 4 DIFF 14TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:15,254
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Product details
Overview
LM239PWR 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, 3.5 nA typical input bias current, 200 µA per comparator quiescent current, and 1 µs response time - deployed in server PSUs, motor drives, and industrial control systems where precision threshold detection is required.
For engineers reviewing the LM239PWR datasheet, LM239PWR pinout, LM239PWR application, or LM239PWR equivalent, this page delivers verified electrical specs, SOIC-14 package details, real-world use cases, and two validated alternative parts with documented functional and thermal differences.
Technical Context
The LM239PWR implements four independent open-collector comparators with rail-to-rail common-mode input range (down to ground), ±38 V differential input capability, and output compatibility with TTL, MOS, and CMOS logic families. Its architecture supports direct interface to pull-up resistors without level-shifting circuitry.
It operates over –25°C to +85°C ambient temperature, draws supply current independent of voltage (0.8–2 mA total), and includes internal ESD protection rated at 2 kV HBM - enabling robust performance in noisy industrial environments with wide supply variations.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 2 V to 36 V - supports wide-input industrial and automotive auxiliary rails without external regulation |
| Input Offset Voltage (max) | ±9 mV over temperature - ensures reliable trip-point accuracy in 12-bit-equivalent analog monitoring |
| Input Bias Current (typ) | 3.5 nA - enables high-impedance sensor interfacing (e.g., thermistors, RTDs) without significant error |
| Response Time | 1.3 µs - suitable for fast overvoltage/undervoltage detection in switched-mode power supplies |
| Output Type | Open-collector - allows wired-OR logic, flexible pull-up voltage selection, and direct interface to 3.3 V or 5 V microcontrollers |
| ESD Rating (HBM) | 2000 V - meets IEC 61000-4-2 Level 2 requirements for board-level handling and assembly |
| Operating Temperature | –25°C to +85°C - qualified for commercial and extended industrial ambient conditions |
Pinout & Package
LM239PWR is packaged in a 14-pin SOIC (PW) with body size 8.70 mm × 3.90 mm, surface-mount footprint, and standard JEDEC MS-012AC outline.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (OUT1) | Comparator 1 output | Open-collector output requiring external pull-up; sinks up to 20 mA |
| 2 (IN1–) | Comparator 1 inverting input | Accepts signals down to ground; common-mode range extends to VCC – 2 V |
| 3 (IN1+) | Comparator 1 non-inverting input | Same common-mode range as IN1–; either input may exceed VCC without damage |
| 4 (VCC) | Positive supply | Single supply pin supporting 2–36 V; powers all four comparators |
| 5 (OUT2) | Comparator 2 output | Independent open-collector output; electrically isolated from OUT1 |
| 6 (IN2–) | Comparator 2 inverting input | Matches IN1– specs; supports differential sensing with 38 V max differential swing |
| 7 (IN2+) | Comparator 2 non-inverting input | Paired with IN2–; no phase inversion relative to comparator transfer function |
| 8 (GND) | Negative supply / reference | Ground return for all comparators and internal biasing; must be low-impedance |
| 9 (IN3–) | Comparator 3 inverting input | Third channel input; identical electrical characteristics to IN1–/IN2– |
| 10 (IN3+) | Comparator 3 non-inverting input | Third channel positive input; fully interchangeable with other IN+ pins |
| 11 (IN4–) | Comparator 4 inverting input | Fourth channel negative input; supports same voltage ranges and ruggedness |
| 12 (IN4+) | Comparator 4 non-inverting input | Fourth channel positive input; no crosstalk or shared bias path with other channels |
| 13 (OUT3) | Comparator 3 output | Third open-collector output; compatible with 3.3 V, 5 V, or 12 V pull-up networks |
| 14 (OUT4) | Comparator 4 output | Fourth independent output; enables simultaneous multi-threshold detection |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail input common-mode range | Includes ground and extends to VCC – 2 V - eliminates need for input level-shifting in single-supply systems |
| ±38 V differential input capability | Allows direct comparison of signals referenced to different potentials (e.g., phase-to-phase voltages in motor drives) |
| Low 200 µA/comparator supply current | Enables always-on monitoring in battery-backed or energy-constrained applications without compromising speed |
| Open-collector outputs with 20 mA sink capability | Supports direct driving of LEDs, relays, or microcontroller GPIOs with configurable logic thresholds |
| 2 kV HBM ESD rating | Reduces risk of field failure during handling, assembly, or operation in electrostatic-prone environments |
Applications
| Overvoltage Protection Circuit | Motor Phase Monitoring |
|---|---|
Use Scenario: Detects DC bus voltage exceeding 30 V in a 24 V server PSU to trigger shutdown before downstream components are damaged. IC Role / Device Role / Timing Role: Quad comparator configured as window detector with hysteresis, comparing sensed voltage against upper and lower thresholds. Use Value: Enables precise, repeatable trip points within ±9 mV offset tolerance - critical for protecting 28 V-rated FETs and controllers. | Use Scenario: Monitors back-EMF zero-crossing in BLDC motor commutation for sensorless control in cordless power tools. IC Role / Device Role / Timing Role: One comparator per phase compares winding voltage to mid-rail reference; outputs feed microcontroller interrupt inputs. Use Value: 1.3 µs propagation delay ensures accurate timing alignment between zero-crossing detection and PWM switching events. |
| Appliance Door Interlock | Building Automation Sensor Interface |
Use Scenario: Verifies mechanical latch engagement in washing machine door assemblies using reed switch or Hall effect feedback. IC Role / Device Role / Timing Role: Comparator converts analog magnetic field strength into clean digital enable signal for main controller. Use Value: Input bias current ≤3.5 nA prevents loading of high-resistance sensor circuits - preserving signal integrity across 10+ meter cable runs. | Use Scenario: Interfaces 0–10 V HVAC temperature sensors to microcontroller ADC inputs by conditioning signal range and noise rejection. IC Role / Device Role / Timing Role: Configured as active-low alarm comparator detecting out-of-range sensor drift or open-circuit faults. Use Value: Common-mode input range including ground allows direct connection to floating sensor outputs without bias resistors or op-amp buffers. |
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; wider temp range (0°C to 70°C); higher max offset (±9 mV); identical pinout and electrical interface | Preferred for cost-sensitive consumer electronics where extended temperature is not required | Select LM339DR when ambient operating range stays within 0–70°C and B-version enhancements are unnecessary |
| LM2901PWR | SOIC-14 pin-compatible; extended temp range (–40°C to +125°C); lower offset (±5.5 mV typ); 2 kV HBM ESD - B-version upgrade | Suitable for automotive under-hood or industrial motor drive control where thermal margin is critical | Choose LM2901PWR when operating beyond 85°C or tighter offset stability is required across full industrial range |
Compared with LM339DR, LM239PWR offers identical functionality at lower cost but with narrower temperature qualification; versus LM2901PWR, it trades extended temperature and improved offset for legacy compatibility and broader availability in commercial-grade designs.
Availability
LM239PWR is available at Aetrix Electronics and suitable for server PSUs, motor drives, appliance safety interlocks, and building automation systems requiring stable component supply, long-term manufacturability, and consistent parametric performance across production batches.
Supply support for LM239PWR 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 personal electronics markets.
The LM239PWR belongs to TI's industry-standard quad comparator family, engineered for reliability in single-supply threshold detection, level translation, and analog signal conditioning across commercial and extended-temperature applications.
FAQ
What is the maximum supply voltage for LM239PWR?
The LM239PWR supports a maximum supply voltage of 36 V, with absolute maximum ratings specifying –0.3 V to +38 V on the VCC pin. This allows safe operation in 24 V industrial systems and transient-tolerant 36 V battery-powered equipment. The device maintains specified performance across the full 2 V to 36 V range, and quiescent current remains stable regardless of supply voltage.
Does LM239PWR have rail-to-rail input capability?
Yes, the LM239PWR features rail-to-rail common-mode input voltage range, extending from ground (V–) up to VCC – 2 V. This enables direct interfacing with sensors and signals referenced to system ground without level-shifting circuitry. Either input can safely exceed VCC, and both inputs tolerate differential voltages up to ±38 V - a key advantage in motor phase monitoring and power supply fault detection.
What is the output configuration of LM239PWR?
The LM239PWR uses open-collector outputs on all four comparators, requiring external pull-up resistors to define logic-high voltage levels. Each output can sink up to 20 mA, supporting direct drive of LEDs, small relays, or microcontroller GPIOs. This architecture enables wired-OR logic, mixed-voltage interfacing (e.g., 3.3 V MCU with 5 V pull-up), and flexible threshold setting without additional level translators.
Can LM239PWR replace LM339 in existing designs?
Yes, LM239PWR is a direct drop-in replacement for LM339 in SOIC-14 packages, sharing identical pinout, electrical specifications, and functional behavior. Both operate over 2 V to 36 V, feature open-collector outputs, and deliver 1.3 µs response time. LM239PWR is specifically qualified for –25°C to +85°C, matching LM339's commercial temperature grade - making it suitable for immediate substitution without layout or firmware changes.
What is the input offset voltage specification for LM239PWR?
The LM239PWR has a maximum input offset voltage of ±9 mV over its full operating temperature range (–25°C to +85°C), with typical value of ±0.37 mV at 25°C. This offset directly impacts threshold accuracy in precision detection circuits - for example, in a 12-bit 3.3 V ADC reference monitor, ±9 mV corresponds to ~11 LSB error. Designers should include hysteresis or calibration if sub-mV accuracy is required.
LM239PWR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Package/Case:
- 14-TSSOP (0.173", 4.40mm 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
- :
- 5mV @ 30V
- Voltage - Input Offset (Max):
- 0.25µA @ 5V
- Current - Input Bias (Max):
- 20mA
- Current - Output (Typ):
- 2mA
- Current - Quiescent (Max):
- -
- CMRR, PSRR (Typ):
- -
- Propagation Delay (Max):
- -
- Hysteresis:
- -25°C ~ 85°C
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- Surface Mount
- :
- 14-TSSOP
LM239PWR FAQ
1.How can I place an order for LM239PWR through Aetrix?
Please submit a Request for Quotation (RFQ) for LM239PWR 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 LM239PWR reliable?
The price and inventory of LM239PWR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM239PWR is usually 5 days.
3.What payment methods are accepted for LM239PWR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM239PWR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM239PWR?
LM239PWR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM239PWR 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 LM239PWR?
For technical support, including LM239PWR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM239PWR requirements.
6.How does Aetrix verify that LM239PWR is sourced from the original manufacturer or authorized distributors?
All LM239PWR 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 LM239PWR meets industry standards.
7.What is the process for return or replacement of LM239PWR?
All LM239PWR units undergo pre-shipment inspection (PSI). If there is an issue with LM239PWR, 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 LM239PWR part is unused and in its original packaging.
Return procedure for LM239PWR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LM239PWR Tags
-
LM2903DR
Texas Instruments
-
LM339DR
Texas Instruments
-
LM339PWR
Texas Instruments
-
LM393DT
STMicroelectronics
-
LM2901PWR
Texas Instruments
-
LM2903DT
STMicroelectronics
-
LM393DR
Texas Instruments
-
LM239DR
Texas Instruments
-
LM339APWR
Texas Instruments
-
LM2903P
Texas Instruments
-
LM393ADR
Texas Instruments
-
NCX2200GMAZ
NXP Semiconductors
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