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Texas Instruments LM239AQDREP
- Part No.:
- LM239AQDREP
- Manufacturer:
- Texas Instruments
- Category:
- Comparators
- Package:
- 14-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
LM239AQDREP.pdf
- Description:
- IC COMPARATOR 4 DIFF 14SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:466
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Product details
Overview
LM239AQDREP from Texas Instruments is a quad differential comparator IC designed for precision voltage comparison in harsh environments. 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 systems, and industrial threshold detection.
For engineers reviewing the LM239AQDREP datasheet, LM239AQDREP pinout, LM239AQDREP application, or LM239AQDREP equivalent, this page delivers verified electrical parameters, military-grade temperature range (–40°C to 125°C), SOIC-14 package details, and validated alternative comparators for high-reliability design-in.
Technical Context
The LM239AQDREP integrates four independent comparators with rail-to-rail common-mode input range including ground, enabling direct sensing of signals referenced to system ground. Its differential input voltage range extends to ±36 V, supporting operation beyond supply rails without damage.
Each comparator uses an internal 80-µA current regulator for stable biasing, ensuring supply-current independence (0.8 mA typical total ICC) across voltage and temperature. Output stages are open-collector, allowing wired-AND configurations and flexible pull-up voltage selection up to 36 V.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Range | Single: 2 V to 36 V; Dual: ±1 V to ±18 V - supports wide-input industrial power rails and battery-backed systems. |
| Input Offset Voltage | 2 mV (typ) - enables accurate threshold detection at low signal differentials without calibration. |
| Input Bias Current | 25 nA (typ) - minimizes loading on high-impedance sensor sources like thermistors or photodiodes. |
| Common-Mode Range | Includes ground to VCC – 2 V - allows direct interface with ground-referenced sensors and ADC references. |
| Output Type | Open-collector - permits level-shifting, wired-AND logic, and interfacing with mixed-voltage digital systems. |
| Response Time | 0.3 µs (TTL-level step) - suitable for fast fault detection in motor control and power-supply sequencing. |
| Operating Temp | –40°C to 125°C - qualified for extended-temperature industrial and defense applications per EP standard. |
Pinout & Package
LM239AQDREP is housed in a 14-pin SOIC (D) package, 1.75 mm max height, JEDEC MS-012 compliant, with pin 1 index area marked on top-side marking "LM239AEP".
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1OUT, 2OUT, 3OUT, 4OUT | Comparator output (open-collector) | Active-low outputs requiring external pull-up; support wired-AND logic and multi-source fault signaling. |
| 1IN+, 1IN−, 2IN+, 2IN−, 3IN+, 3IN−, 4IN+, 4IN− | Differential input pairs | Eight inputs configured as four independent comparator channels; each pair accepts rail-to-rail common-mode signals. |
| VCC | Positive supply terminal | Accepts 2 V to 36 V single supply or positive rail of dual supply; powers all four comparators. |
| GND | Ground reference | Return path for supply and input common-mode; supports ground-referenced input operation. |
Key Features
| Feature | Design Value |
|---|---|
| Controlled Baseline & Extended Life Cycle | Manufactured at one fabrication and test site with product-change notification and traceability-critical for long-lifecycle defense and medical programs. |
| ESD-Safe Handling Design | Specified ESD sensitivity per JESD22-A114; requires handling per TI's ESD guidelines to prevent parametric shift or failure in precision applications. |
| Low Input Offset Current | 5 nA (typ) - ensures matched input currents, reducing offset drift in high-gain reference circuits and instrumentation front-ends. |
| Wide Differential Input Range | ±36 V - allows direct comparison of signals exceeding supply rails, e.g., detecting overvoltage on unregulated DC bus lines. |
| Output Saturation Voltage | 700 mV (max at IOL = 4 mA) - guarantees reliable low-state logic recognition even under heavy sink loads. |
Applications
| Overvoltage Protection Circuit | Battery Cell Balancing Monitor |
|---|---|
|
Use Scenario: Detecting when a 24-V DC bus exceeds 27 V to trigger shutdown or clamping. IC Role / Device Role / Timing Role: Quad comparator compares scaled bus voltage against precision reference; outputs drive latch or MCU interrupt. Use Value: 2 mV offset and rail-to-rail input enable <±0.1% threshold accuracy; open-collector outputs interface directly with 3.3-V microcontroller GPIO. |
Use Scenario: Monitoring individual Li-ion cell voltages in a 12-cell pack to identify imbalance >30 mV. IC Role / Device Role / Timing Role: Four comparators monitor adjacent cell pairs; outputs feed discrete logic for balancing FET control. Use Value: 25 nA input bias prevents loading of high-impedance voltage dividers; –40°C to 125°C rating supports under-hood automotive deployment. |
| Industrial Temperature Threshold Alarm | Programmable Logic Controller (PLC) Input Conditioning |
|
Use Scenario: Triggering alarm when RTD-based temperature measurement exceeds 105°C in factory automation equipment. IC Role / Device Role / Timing Role: Comparator compares amplified RTD voltage against DAC-generated threshold; hysteresis added externally. Use Value: Common-mode range including ground allows direct connection to grounded RTD bridges; low supply current (0.8 mA) reduces thermal load in sealed enclosures. |
Use Scenario: Converting 0–10 V analog sensor inputs into clean 24-V digital signals for PLC backplane I/O modules. IC Role / Device Role / Timing Role: Each comparator digitizes one analog channel; outputs drive optocouplers or solid-state relays. Use Value: ±36 V differential input range tolerates field-wiring transients; 0.3 µs response ensures real-time status updates in safety-critical motion control loops. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar quad comparator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM239AMDREP | Same architecture and specs, but rated for –55°C to 125°C operating range and marked "LM239AME". | Required for full military-spec temperature coverage; not needed if –40°C lower limit suffices. | Select LM239AMDREP only when extended cold-start capability below –40°C is mandatory. |
| LM239AMPWREP | Identical electrical performance, but in TSSOP-14 (PW) package: 5.0 mm × 4.4 mm, 1.2 mm max height. | Suitable for space-constrained PCBs where SOIC footprint is prohibitive; reflow-compatible with same MSL-1 profile. | Choose LM239AMPWREP when board area is constrained and fine-pitch assembly capability exists. |
Compared with LM239AQDREP, LM239AMDREP extends low-temperature operation to –55°C at no electrical trade-off, while LM239AMPWREP offers identical performance in a 40% smaller footprint-enabling denser industrial control modules without redesigning comparator circuitry.
Availability
LM239AQDREP is available at Aetrix Electronics and suitable for overvoltage protection, battery management, industrial temperature monitoring, and PLC input conditioning requiring stable component supply across extended temperature and long product lifecycles.
Supply support for LM239AQDREP 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, with decades of heritage in precision analog ICs.
The LM239A-EP product line delivers enhanced-plastic quad comparators engineered for defense, aerospace, and medical applications-designed to meet stringent reliability, traceability, and extended-temperature requirements without sacrificing performance.
FAQ
What is the maximum supply voltage for LM239AQDREP?
The LM239AQDREP supports a maximum supply voltage of 36 V for single-supply operation and ±18 V for dual-supply use. Absolute maximum ratings specify VCC ≤ 36 V and differential input voltage ≤ ±36 V. Exceeding these limits risks permanent damage, per TI's SCLS496C datasheet Section 6.1.
Does LM239AQDREP have rail-to-rail input capability?
Yes, the LM239AQDREP features a common-mode input voltage range that includes ground and extends to VCC – 2 V, enabling true rail-to-rail operation relative to ground. This allows direct interfacing with ground-referenced sensors and reference voltages without level-shifting circuitry.
Is LM239AQDREP pin-compatible with standard LM239A variants?
Yes, LM239AQDREP uses the industry-standard SOIC-14 (D) package with identical pinout to LM239A, LM239AMDREP, and LM239AMPWREP (though the latter uses TSSOP-14). Pin functions-including 1OUT through 4OUT, all IN+ and IN− terminals, VCC, and GND-are fully aligned per TI's SCLS496C schematic and pin diagram.
What is the output configuration of LM239AQDREP?
The LM239AQDREP features open-collector outputs on all four comparators. Each output requires an external pull-up resistor to a defined logic-high voltage (up to 36 V), enabling wired-AND logic, level translation, and compatibility with TTL, MOS, and CMOS loads as specified in the Electrical Characteristics table.
What temperature range is LM239AQDREP qualified for?
The LM239AQDREP is qualified for operation from –40°C to 125°C ambient temperature. This extended industrial range is confirmed in TI's Ordering Information table and Package Option Addendum, distinguishing it from the –55°C to 125°C LM239AMDREP variant.
LM239AQDREP 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 @ 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:
- -40°C ~ 125°C
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- Surface Mount
- :
- 14-SOIC
LM239AQDREP FAQ
1.How can I place an order for LM239AQDREP through Aetrix?
Please submit a Request for Quotation (RFQ) for LM239AQDREP 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 LM239AQDREP reliable?
The price and inventory of LM239AQDREP are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM239AQDREP is usually 5 days.
3.What payment methods are accepted for LM239AQDREP?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM239AQDREP transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM239AQDREP?
LM239AQDREP orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM239AQDREP 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 LM239AQDREP?
For technical support, including LM239AQDREP datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM239AQDREP requirements.
6.How does Aetrix verify that LM239AQDREP is sourced from the original manufacturer or authorized distributors?
All LM239AQDREP 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 LM239AQDREP meets industry standards.
7.What is the process for return or replacement of LM239AQDREP?
All LM239AQDREP units undergo pre-shipment inspection (PSI). If there is an issue with LM239AQDREP, 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 LM239AQDREP part is unused and in its original packaging.
Return procedure for LM239AQDREP:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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