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Texas Instruments LM239AMDREP
- Part No.:
- LM239AMDREP
- Manufacturer:
- Texas Instruments
- Category:
- Comparators
- Package:
- 14-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
LM239AMDREP.pdf
- Description:
- IC COMPARATOR 4 DIFF 14SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:4,863
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Product details
Overview
LM239AMDREP from Texas Instruments is a quad differential comparator IC designed for precision voltage comparison in harsh-environment systems. It operates from single supplies (2 V to 36 V) or dual supplies (±1 V to ±18 V), features 2 mV typical input offset voltage, 25 nA typical input bias current, and open-collector outputs compatible with TTL/MOS/CMOS logic-commonly used in overvoltage protection circuits, battery monitoring, and industrial threshold detection.
For engineers reviewing the LM239AMDREP datasheet, LM239AMDREP pinout, LM239AMDREP application, or LM239AMDREP equivalent, this page delivers verified electrical parameters, military-grade temperature range (–55°C to 125°C), SOIC-14 package details, and validated alternative options for defense, aerospace, and medical system designs.
Technical Context
The LM239AMDREP integrates four independent comparators with rail-to-rail common-mode input range including ground, enabling direct sensing of signals referenced to system ground. Each comparator supports differential input voltages up to ±36 V and exhibits low supply-current drain (0.8 mA typ) independent of supply voltage.
Its open-collector outputs allow wired-AND configurations and interface directly with TTL, MOS, and CMOS loads. Input stage design ensures stable operation across wide supply ranges while maintaining low input offset current (5 nA typ) and low output saturation voltage under load.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | Single: 2 V to 36 V; Dual: ±1 V to ±18 V - enables use in 3.3 V, 5 V, 12 V, 24 V, and 32 V industrial power rails without level-shifting. |
| Input Offset Voltage | 2 mV (typ) - ensures accurate threshold detection within ±2 mV error at room temperature. |
| Input Bias Current | 25 nA (typ) - minimizes loading on high-impedance sensor sources such as thermistors or photodiodes. |
| Common-Mode Input Range | Includes ground and extends to VCC – 2 V - allows direct interfacing with ground-referenced analog signals. |
| Output Type | Open-collector - supports wired-AND logic, pull-up to any compatible voltage rail (e.g., 3.3 V or 5 V), and mixed-voltage system interfacing. |
| Operating Temperature | –55°C to 125°C - qualified for extended-life military, aerospace, and downhole industrial applications. |
| Response Time | 0.3 µs (TTL-level step) - suitable for fast edge-detection tasks like pulse-width monitoring or zero-crossing detection. |
Pinout & Package
LM239AMDREP is housed in a 14-pin SOIC (D) package, 1.75 mm maximum height, with JEDEC MS-012AB compliance and RoHS-compliant NiPdAu lead finish. Pin 1 is located in quadrant Q1 per tape-and-reel orientation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1OUT, 2OUT, 3OUT, 4OUT | Comparator output terminals | Open-collector outputs requiring external pull-up; sink up to 20 mA each for driving LEDs, relays, or logic inputs. |
| 1IN+, 2IN+, 3IN+, 4IN+ | Non-inverting input | Accepts reference or signal voltage; common-mode range includes ground and extends near VCC. |
| 1IN−, 2IN−, 3IN−, 4IN− | Inverting input | Accepts feedback or threshold voltage; differential input voltage tolerance ±36 V prevents damage during transients. |
| VCC | Positive supply terminal | Connects to main positive rail; must be ≥1.5 V above lowest input common-mode voltage for proper operation. |
| GND | Ground reference | System ground return path; all input common-mode voltages referenced to this node. |
Key Features
| Feature | Design Value |
|---|---|
| Controlled Baseline & Extended Life Cycle | Manufactured at one fabrication and test site with full traceability-ensures consistent parametric performance across production lots for long-lifecycle programs. |
| Wide Supply Range Operation | Functions reliably from 2 V to 36 V single supply or ±1 V to ±18 V dual supply-eliminates need for auxiliary regulators in multi-rail systems. |
| Low Input Offset Voltage Drift | 2 mV typical offset with minimal drift over temperature-reduces calibration burden in precision threshold applications like medical sensor interfaces. |
| ESD-Safe Handling Design | Rated per JESD22-A114; TI recommends ESD precautions-critical for assembly integrity in cleanroom or field-repair environments. |
| Military Temperature Qualification | Tested and specified from –55°C to 125°C-validated for operation in avionics, satellite subsystems, and oilfield electronics. |
Applications
| Overvoltage Protection Circuit | Battery State-of-Charge Monitor |
|---|---|
|
Use Scenario: Detects when input voltage exceeds safe limits in DC power distribution systems, triggering shutdown or clamping. IC Role / Device Role / Timing Role: Quad comparator compares four independent voltage thresholds against monitored rails (e.g., +12 V, +5 V, +3.3 V, backup battery). Use Value: Enables simultaneous monitoring of multiple supply domains using one IC, reducing board space and BOM count versus discrete solutions. |
Use Scenario: Tracks cell voltage levels in multi-cell Li-ion or lead-acid battery packs to prevent overcharge or deep discharge. IC Role / Device Role / Timing Role: Each comparator monitors individual cell voltage against fixed reference; outputs feed microcontroller GPIO or latch circuitry. Use Value: 25 nA input bias current avoids loading high-impedance divider networks, preserving measurement accuracy across temperature. |
| Industrial Threshold Detector | Aerospace Sensor Interface |
|
Use Scenario: Converts analog sensor outputs (e.g., pressure, temperature) into digital logic states for PLC input modules or alarm systems. IC Role / Device Role / Timing Role: Compares conditioned sensor signal against programmable reference; open-collector outputs drive optocouplers or isolation buffers. Use Value: Rail-to-rail common-mode input range accepts ground-referenced signals without level-shifting, simplifying front-end design. |
Use Scenario: Interfaces radiation-hardened or high-reliability sensors in flight control or navigation subsystems where ambient temperature swings exceed commercial grade limits. IC Role / Device Role / Timing Role: Provides fault-tolerant voltage window detection for redundant sensor voting logic in safety-critical avionics. Use Value: –55°C to 125°C qualification and controlled baseline manufacturing ensure consistent behavior across mission-critical thermal cycles. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar quad comparator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM239AMPWREP | TSSOP-14 package (5.0 mm × 4.4 mm), 1.2 mm max height; identical electrical specs and –55°C to 125°C rating. | Preferred for space-constrained PCBs; requires different land pattern and stencil design vs. SOIC. | Select when board area is limited and reflow profile supports TSSOP MSL-1 handling. |
| LM239AQDREP | SOIC-14 package, but rated for –40°C to 125°C (not –55°C); otherwise identical electrical performance and pinout. | Suitable for automotive or industrial environments where extreme cold-start is not required. | Choose for cost-sensitive programs needing catalog-grade reliability without full military temp range. |
Compared with LM239AMDREP, LM239AMPWREP offers identical functionality in a smaller footprint but demands tighter layout controls, while LM239AQDREP trades extended low-temperature capability for broader commercial availability and lower unit cost-both require no schematic changes but differ in thermal derating and mechanical integration.
Availability
LM239AMDREP is available at Aetrix Electronics and suitable for defense electronics, aerospace subsystems, and medical instrumentation requiring stable component supply across extended product lifecycles and extreme temperature operation.
Supply support for LM239AMDREP 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, embedded processing, and high-reliability components for industrial, automotive, and aerospace markets.
The LM239A-EP product line delivers enhanced plastic packaged comparators engineered for extended life, full traceability, and operation in defense, aerospace, and medical applications demanding –55°C to 125°C performance.
FAQ
What is the operating temperature range of the LM239AMDREP?
The LM239AMDREP is specified for operation from –55°C to 125°C. This extended temperature range is validated per military-grade testing protocols and supports deployment in avionics, downhole tools, and space-qualified subsystems where ambient conditions exceed commercial-grade limits. The LM239AMDREP maintains its key specifications-including input offset voltage and supply current-across this full range.
Does the LM239AMDREP support dual-supply operation?
Yes, the LM239AMDREP supports dual-supply operation with voltage ranges of ±1 V to ±18 V. The absolute difference between VCC and GND must remain between 2 V and 36 V, and VCC must be at least 1.5 V more positive than the lowest input common-mode voltage. This flexibility allows use in legacy bipolar systems without redesigning the power architecture.
What is the maximum differential input voltage the LM239AMDREP can withstand?
The LM239AMDREP tolerates a differential input voltage of ±36 V, matching its maximum-rated supply voltage. This specification protects the internal input stage during transient events such as load dump or inductive kickback, making the LM239AMDREP suitable for ruggedized industrial and automotive subsystems where input overvoltage is a known risk.
Is the LM239AMDREP pin-compatible with standard LM239 variants?
Yes, the LM239AMDREP uses the industry-standard 14-pin SOIC (D) package with identical pinout to LM239, LM239A, and LM239A-Q1 devices. No PCB layout changes are required when upgrading to the LM239AMDREP for enhanced temperature range or traceability-only sourcing and documentation updates are needed.
What logic families are compatible with the LM239AMDREP's open-collector outputs?
The LM239AMDREP's open-collector outputs are explicitly rated for compatibility with TTL, MOS, and CMOS logic families. When pulled up to 3.3 V, 5 V, or 15 V, they deliver clean logic transitions and can sink up to 20 mA per output-supporting direct interface to microcontrollers, FPGAs, optocouplers, and relay drivers without additional buffering.
LM239AMDREP Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Package/Case:
- 14-SOIC (0.154", 3.90mm 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 ~ 36V, ±1V ~ 18V
- :
- 2.5mV @ 1.4V
- Voltage - Input Offset (Max):
- 0.25µA @ 1.4V
- Current - Input Bias (Max):
- 20mA
- Current - Output (Typ):
- 2mA
- Current - Quiescent (Max):
- -
- CMRR, PSRR (Typ):
- -
- Propagation Delay (Max):
- -
- Hysteresis:
- -55°C ~ 125°C
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- Surface Mount
- :
- 14-SOIC
LM239AMDREP FAQ
1.How can I place an order for LM239AMDREP through Aetrix?
Please submit a Request for Quotation (RFQ) for LM239AMDREP 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 LM239AMDREP reliable?
The price and inventory of LM239AMDREP are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM239AMDREP is usually 5 days.
3.What payment methods are accepted for LM239AMDREP?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM239AMDREP transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM239AMDREP?
LM239AMDREP orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM239AMDREP 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 LM239AMDREP?
For technical support, including LM239AMDREP datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM239AMDREP requirements.
6.How does Aetrix verify that LM239AMDREP is sourced from the original manufacturer or authorized distributors?
All LM239AMDREP 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 LM239AMDREP meets industry standards.
7.What is the process for return or replacement of LM239AMDREP?
All LM239AMDREP units undergo pre-shipment inspection (PSI). If there is an issue with LM239AMDREP, 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 LM239AMDREP part is unused and in its original packaging.
Return procedure for LM239AMDREP:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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