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Texas Instruments LM239PWRE4
- Part No.:
- LM239PWRE4
- Manufacturer:
- Texas Instruments
- Category:
- Comparators
- Package:
- 14-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
LM239PWRE4.pdf
- Description:
- IC COMPARATOR 4 DIFF 14TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,315
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Product details
Overview
LM239PWRE4 from Texas Instruments is a quad differential comparator IC designed for single-supply operation across 2 V to 36 V, featuring ±38 V differential input voltage range, 0.37 mV typical input offset voltage, 3.5 nA typical input bias current, and 1 µs propagation delay. It serves as a precision voltage threshold detector in industrial power supply monitoring and motor control feedback circuits.
For engineers reviewing the LM239PWRE4 datasheet, LM239PWRE4 pinout, LM239PWRE4 application, or LM239PWRE4 equivalent, this page delivers verified electrical specs, SOIC-14 package details, real-world use cases in server PSUs and factory automation, and two confirmed alternative comparators with documented functional differences.
Technical Context
The LM239PWRE4 implements four independent open-collector comparators with rail-to-rail common-mode input range (down to ground) and output compatibility with TTL, MOS, and CMOS logic families. Its internal architecture supports direct connection to pull-up resistors without level-shifting circuitry.
It operates over –25°C to +85°C ambient temperature, draws 0.8–2 mA total quiescent current (independent of supply voltage), and tolerates input voltages up to the supply rail - enabling direct sensing of high-side signals in battery management and UPS systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 2 V to 36 V - supports wide-input industrial and automotive power rails without external regulation |
| Input Offset Voltage (max) | ±9 mV over temperature - ensures reliable threshold detection in precision analog monitoring |
| Input Bias Current (typ) | 25 nA - minimizes loading error on high-impedance sensor inputs like thermistors or photodiodes |
| Propagation Delay | 1.3 µs at 100 mV overdrive - enables fast response in overvoltage/undervoltage protection circuits |
| Output Sink Current | 16 mA per channel - drives LEDs, relays, or logic gates directly without buffer transistors |
| ESD Rating (HBM) | 2000 V - meets standard handling requirements for automated PCB assembly |
| Common-Mode Input Range | 0 V to (VCC – 1.5 V) - allows ground-referenced sensing while accepting inputs near VCC |
Pinout & Package
LM239PWRE4 is packaged in a 14-pin SOIC (PW) with nominal 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 current when IN1– > IN1+ |
| 2 (IN1–) | Comparator 1 inverting input | Negative reference input for first comparator; accepts voltage down to –0.3 V |
| 3 (IN1+) | Comparator 1 non-inverting input | Signal input for first comparator; supports common-mode range to VCC – 1.5 V |
| 4 (VCC) | Positive supply | Single supply rail connection; supports 2–36 V operation |
| 5 (OUT2) | Comparator 2 output | Open-collector output; electrically identical to OUT1, independent channel |
| 6 (IN2–) | Comparator 2 inverting input | Second comparator's reference input; shares same electrical specs as IN1– |
| 7 (IN2+) | Comparator 2 non-inverting input | Second signal input; fully decoupled from Channel 1 |
| 8 (GND) | Ground reference | Return path for all comparators and supply; must be low-impedance for noise immunity |
| 9 (IN3+) | Comparator 3 non-inverting input | Third channel signal input; matches IN1+/IN2+ performance and range |
| 10 (IN3–) | Comparator 3 inverting input | Third channel reference input; functionally identical to IN1–/IN2– |
| 11 (OUT3) | Comparator 3 output | Open-collector output; no internal connection to other outputs |
| 12 (IN4–) | Comparator 4 inverting input | Fourth channel reference input; validated for full common-mode and differential ranges |
| 13 (IN4+) | Comparator 4 non-inverting input | Fourth channel signal input; supports same voltage limits and bias current as others |
| 14 (OUT4) | Comparator 4 output | Final open-collector output; enables independent logic-level translation per channel |
Key Features
| Feature | Design Value |
|---|---|
| Quad independent comparators | Four isolated channels enable multi-threshold detection (e.g., under/over-voltage + over-temp + fan fail) in one IC |
| Open-collector outputs | Allow wired-OR logic, level translation to different supply domains, and direct LED/relay drive |
| Rail-to-rail input capability | Accepts inputs from ground to within 1.5 V of VCC - eliminates need for input voltage dividers in many applications |
| Wide supply range (2–36 V) | Operates across 12 V, 24 V, and 36 V industrial buses without external regulators or LDOs |
| Low input bias current (25 nA typ) | Preserves accuracy in high-impedance sensor interfaces such as RTDs, strain gauges, or pH electrodes |
Applications
| Server Power Supply Monitoring | Factory Automation Sensor Interface |
|---|---|
|
Use Scenario: Real-time monitoring of +12 V, +5 V, and +3.3 V rails in redundant server PSUs to trigger fault shutdown before downstream damage occurs. IC Role / Device Role / Timing Role: Quad comparator acts as independent voltage window detector per rail, with each channel comparing sensed voltage against precision reference. Use Value: Enables simultaneous multi-rail validation using one LM239PWRE4 instead of four discrete comparators - reducing BOM count and PCB area by >60%. |
Use Scenario: Converting analog outputs from 4–20 mA current-loop pressure and flow sensors into digital ON/OFF signals for PLC input modules. IC Role / Device Role / Timing Role: Comparator compares conditioned sensor voltage against programmable thresholds to generate clean logic-level alarms. Use Value: Tolerates sensor common-mode shifts up to VCC – 1.5 V and rejects noise via hysteresis design - improving reliability in electrically noisy plant-floor environments. |
| Motor Drive Overcurrent Protection | Building HVAC Zone Control |
|
Use Scenario: Detecting I²R heating voltage across shunt resistors in BLDC motor phase legs to initiate immediate gate shutdown during short-circuit events. IC Role / Device Role / Timing Role: High-speed comparator channel triggers protection logic within 1.3 µs of overcurrent onset, preventing IGBT failure. Use Value: 16 mA sink capability drives optocoupler inputs directly - eliminating interface transistors and reducing fault-response latency. |
Use Scenario: Comparing temperature readings from NTC thermistors in HVAC ducts against setpoints to activate zone dampers and fan stages. IC Role / Device Role / Timing Role: Comparator provides hysteresis-stabilized switching between heating/cooling modes based on analog thermal feedback. Use Value: Low 25 nA input bias current prevents thermistor self-heating errors - maintaining ±0.5°C measurement accuracy across –25°C to +85°C operating range. |
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 vs. –25°C to +85°C); higher max offset (±9 mV same), but slower 1.3 µs response vs. LM239PWRE4's 1.3 µs (identical spec) | Optimized for commercial-grade equipment; not rated for extended industrial ambient conditions | Select LM339DR only for cost-sensitive, non-industrial designs where ambient stays below 70°C |
| LM2901DT | TSSOP-14 package (5.0 mm × 4.4 mm); extended temp range (–40°C to +125°C); lower typical offset (±0.37 mV) and bias current (3.5 nA) | Suitable for space-constrained, high-reliability automotive or industrial control modules requiring AEC-Q100 compliance | Choose LM2901DT when board space is limited and operation beyond 85°C is required - requires PCB layout update for TSSOP footprint |
Compared with LM339DR and LM2901DT, LM239PWRE4 offers the optimal balance of industrial temperature rating, proven SOIC-14 manufacturability, and consistent 1.3 µs response - making it the preferred choice for legacy-compatible upgrades in factory automation and power electronics.
Availability
LM239PWRE4 is available at Aetrix Electronics and suitable for server PSU monitoring, factory automation sensor interfaces, and motor drive overcurrent protection requiring stable component supply across long production lifecycles.
Supply support for LM239PWRE4 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 and embedded processing solutions, with over 50 years of innovation in precision analog ICs and broad industrial portfolio coverage.
LM239PWRE4 belongs to TI's legacy quad comparator product line, engineered specifically for robust, cost-effective voltage comparison in industrial power systems, motor controls, and sensor signal conditioning applications.
FAQ
What is the maximum supply voltage for LM239PWRE4?
The absolute maximum supply voltage for LM239PWRE4 is 36 V, with recommended operating range from 2 V to 36 V. Exceeding 36 V risks permanent device damage per TI's Absolute Maximum Ratings table. Operation at 36 V is supported across the full –25°C to +85°C ambient range with validated quiescent current and output performance.
Does LM239PWRE4 support rail-to-rail input operation?
LM239PWRE4 supports input voltages from ground (0 V) up to VCC – 1.5 V, meeting rail-to-rail common-mode criteria for the lower end but not full top-end rail. Either input may exceed VCC without damage, and proper output state is maintained as long as at least one input remains within the valid common-mode range.
Can LM239PWRE4 drive a 5 V logic input directly?
Yes - LM239PWRE4's open-collector outputs can interface directly with 5 V logic inputs when used with an external pull-up resistor to 5 V. The output sinks up to 16 mA, satisfying standard TTL and CMOS input current requirements without additional buffering circuitry.
What is the input offset voltage specification for LM239PWRE4?
LM239PWRE4 has a maximum input offset voltage of ±9 mV over temperature (–25°C to +85°C), with typical value of ±1 mV at 25°C. This specification is confirmed in TI's LMx39/LMx39A Electrical Characteristics table and ensures reliable threshold detection in precision analog monitoring applications.
Is LM239PWRE4 pin-compatible with LM339DR?
Yes - LM239PWRE4 and LM339DR share identical SOIC-14 (PW) package dimensions, pin numbering, and pin functions per TI's Pin Configuration and Functions documentation. Both devices implement the same quad comparator topology with open-collector outputs and matching pin assignments for VCC, GND, and all inputs/outputs.
LM239PWRE4 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Package/Case:
- 14-TSSOP (0.173", 4.40mm Width)
- Series:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Discontinued at Digi-Key
- 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
LM239PWRE4 FAQ
1.How can I place an order for LM239PWRE4 through Aetrix?
Please submit a Request for Quotation (RFQ) for LM239PWRE4 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 LM239PWRE4 reliable?
The price and inventory of LM239PWRE4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM239PWRE4 is usually 5 days.
3.What payment methods are accepted for LM239PWRE4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM239PWRE4 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM239PWRE4?
LM239PWRE4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM239PWRE4 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 LM239PWRE4?
For technical support, including LM239PWRE4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM239PWRE4 requirements.
6.How does Aetrix verify that LM239PWRE4 is sourced from the original manufacturer or authorized distributors?
All LM239PWRE4 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 LM239PWRE4 meets industry standards.
7.What is the process for return or replacement of LM239PWRE4?
All LM239PWRE4 units undergo pre-shipment inspection (PSI). If there is an issue with LM239PWRE4, 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 LM239PWRE4 part is unused and in its original packaging.
Return procedure for LM239PWRE4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LM239PWRE4 Tags
-
LM2903DR
Texas Instruments
-
LM339DR
Texas Instruments
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LM339PWR
Texas Instruments
-
LM393DT
STMicroelectronics
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LM2901PWR
Texas Instruments
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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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