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Texas Instruments LM239ADRE4
- Part No.:
- LM239ADRE4
- Manufacturer:
- Texas Instruments
- Category:
- Comparators
- Package:
- 14-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
LM239ADRE4.pdf
- Description:
- IC COMPARATOR 4 DIFF 14SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:2,233
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Product details
Overview
LM239ADRE4 from Texas Instruments is a quad differential comparator IC designed for single-supply operation across 2 V to 36 V, featuring ±5.5 mV max input offset voltage (over temperature), 1.3 µs typical response time, and rail-to-rail common-mode input range down to ground-used in server PSU overvoltage detection, motor drive fault monitoring, and industrial sensor thresholding.
For engineers reviewing the LM239ADRE4 datasheet, LM239ADRE4 pinout, LM239ADRE4 application, or LM239ADRE4 equivalent, key selection criteria include supply voltage range (2–36 V), output compatibility with TTL/MOS/CMOS logic, low quiescent current (0.8–2 mA), extended temperature support (–25°C to +85°C), and SOIC-14 package footprint compatibility with legacy LMx39 designs.
Technical Context
The LM239ADRE4 implements four independent open-collector comparators with internal ESD protection (2 kV HBM), enabling robust operation in noisy industrial environments. Its input stage supports common-mode voltages from ground to VCC – 2 V, and differential inputs tolerate up to ±36 V without damage.
Each comparator delivers 6 mA minimum sink current at 1.5 V output swing, with propagation delay optimized for fast decision-making in feedback loops and safety-critical monitoring circuits-consistent with the LM239A grade's electrical specifications and thermal performance in SOIC-14 packaging.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 2 V to 36 V - enables direct use in 3.3 V, 5 V, 12 V, and 24 V industrial rails without level-shifting. |
| Input Offset Voltage (max) | ±4 mV over full temperature range - ensures accurate threshold detection in precision sensor interfaces. |
| Response Time (typ) | 1.3 µs - supports real-time fault response in motor control and power supply protection circuits. |
| Quiescent Current (per device) | 0.8–2 mA - allows low-power operation in battery-backed or energy-sensitive systems. |
| Output Sink Current (min) | 6 mA at VOL = 1.5 V - drives standard LED indicators, optocouplers, or logic-level MOSFET gates directly. |
| Common-Mode Input Range | Ground to VCC – 2 V - permits direct sensing of signals referenced to system ground, including current-sense amplifiers. |
| ESD Rating (HBM) | 2000 V - meets industrial handling requirements without additional external protection circuitry. |
Pinout & Package
LM239ADRE4 is housed in a 14-pin SOIC (Small Outline Integrated Circuit) package measuring 8.70 mm × 3.90 mm, with standard JEDEC MS-012AC footprint and gull-wing leads for surface-mount assembly.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (OUT1) | Comparator 1 output | Open-collector output requiring external pull-up; sinks current when comparator trips. |
| 2 (IN1–) | Comparator 1 inverting input | Accepts reference or feedback signal; common-mode range extends to ground. |
| 3 (IN1+) | Comparator 1 non-inverting input | Accepts sensed signal; supports rail-to-rail input voltage up to VCC – 2 V. |
| 4 (VCC) | Positive supply | Single supply input; powers all four comparators; no separate ground pin required for bias. |
| 5 (OUT2) | Comparator 2 output | Independent open-collector output; electrically isolated from OUT1 for multi-channel logic. |
| 6 (IN2–) | Comparator 2 inverting input | Dedicated negative input; shares same electrical specs as IN1– for matched channel performance. |
| 7 (IN2+) | Comparator 2 non-inverting input | Matches IN1+ in voltage range and bias current (–25 nA typ), enabling dual-sensor comparison. |
| 8 (GND) | Negative supply / reference | System ground return; also serves as output reference for open-collector outputs. |
| 9 (OUT3) | Comparator 3 output | Third independent output; supports cascaded or parallel fault-detection architectures. |
| 10 (IN3–) | Comparator 3 inverting input | Enables three-input monitoring schemes (e.g., overvoltage, undervoltage, overtemperature). |
| 11 (IN3+) | Comparator 3 non-inverting input | Provides third sensing path with identical input impedance and offset characteristics. |
| 12 (OUT4) | Comparator 4 output | Final output channel; allows full quad implementation in compact space-constrained PCB layouts. |
| 13 (IN4–) | Comparator 4 inverting input | Supports fourth independent threshold comparison, e.g., auxiliary supply monitoring. |
| 14 (IN4+) | Comparator 4 non-inverting input | Completes quad configuration; all inputs rated for ±36 V differential stress without latch-up. |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail input common-mode range | Operates with inputs down to ground and up to VCC – 2 V-eliminates need for input biasing resistors in single-supply systems. |
| Open-collector outputs | Enable wired-OR logic, level translation, and direct interface to TTL, MOS, and CMOS loads without external buffers. |
| Low input bias current (–25 nA typ) | Minimizes loading on high-impedance sources such as thermistors, photodiodes, or precision voltage dividers. |
| Wide supply range (2–36 V) | Supports direct integration into 3.3 V microcontroller I/O domains and 24 V industrial control backplanes. |
| 2 kV HBM ESD rating | Reduces risk of field failure during handling or operation in electrostatic-prone factory environments. |
Applications
| Server Power Supply Monitoring | Motor Drive Fault Detection |
|---|---|
Use Scenario: Real-time monitoring of +12 V, +5 V, and +3.3 V rails in redundant server PSUs to trigger shutdown on overvoltage or undervoltage events. IC Role / Device Role / Timing Role: Quad comparator performs simultaneous threshold comparisons; each channel dedicated to one rail with hysteresis via external feedback. Use Value: Enables sub-millisecond fault response using 1.3 µs propagation delay, preventing downstream component damage before protection ICs react. | Use Scenario: Detecting phase current imbalance, overcurrent, and DC bus overvoltage in 3-phase BLDC motor inverters. IC Role / Device Role / Timing Role: LM239ADRE4 compares current-sense amplifier outputs against programmable thresholds; outputs feed FPGA or MCU interrupt lines. Use Value: Low input offset (±4 mV) ensures accurate trip points at millivolt-level sense voltages, improving torque control fidelity and thermal margin. |
| Industrial Sensor Interface | Building Automation Control |
Use Scenario: Converting analog outputs from RTDs, thermocouples, or pressure transducers into digital on/off signals for HVAC zone controllers. IC Role / Device Role / Timing Role: Comparator acts as analog-to-digital threshold detector; open-collector outputs interface directly to PLC input modules. Use Value: Rail-to-rail input range accepts 0–10 V or 4–20 mA loop signals without external op-amp conditioning stages. | Use Scenario: Occupancy-based lighting control using PIR sensor outputs, combined with ambient light level thresholds for daylight harvesting. IC Role / Device Role / Timing Role: Two comparators process motion and light signals independently; remaining two implement AND logic via wired-OR for occupancy + low-light activation. Use Value: SOIC-14 package allows dense placement on compact building controller PCBs while maintaining thermal stability across –25°C to +85°C ambient. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar quad comparator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM239DR | Same SOIC-14 package and LM239A-grade specs, but rated for –25°C to +85°C only (no ESD enhancement beyond 2 kV HBM); identical pinout and electrical behavior. | No functional difference in industrial control or power monitoring; suitable where enhanced ESD robustness is not required. | Select LM239DR if cost sensitivity outweighs need for TI's latest ESD-hardened process; fully drop-in compatible. |
| LM339ADR | SOIC-14 package, LM339A grade: wider temp range (0°C to +70°C), higher max input offset (±3 mV), lower supply current (0.8–2 mA), but no guaranteed 2 kV HBM rating. | Better suited for commercial-grade equipment (e.g., consumer appliances) where ambient temperature stays within 0–70°C. | Choose LM339ADR for cost-optimized commercial designs with less stringent ESD or temperature requirements. |
Compared with LM239DR and LM339ADR, the LM239ADRE4 provides verified 2 kV HBM ESD protection and tighter input offset voltage specification (±4 mV vs. ±3–±9 mV), making it preferred for industrial environments with frequent handling or wide ambient swings.
Availability
LM239ADRE4 is available at Aetrix Electronics and suitable for server PSU monitoring, motor drive fault detection, and industrial sensor interface applications requiring stable component supply across long production lifecycles.
Supply support for LM239ADRE4 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 for industrial, automotive, and communications markets.
The LM239A family-including LM239ADRE4-is engineered for reliable, low-cost voltage comparison in harsh industrial settings, emphasizing robustness, wide supply range, and compatibility with legacy designs.
FAQ
What is the operating temperature range for LM239ADRE4?
The LM239ADRE4 is specified for operation from –25°C to +85°C ambient temperature. This range aligns with the LM239A grade and supports deployment in industrial control cabinets, motor drives, and power supply units exposed to elevated thermal environments. The device maintains its ±4 mV maximum input offset voltage and 1.3 µs typical response time across this full range, as validated in TI's LM239A characterization data.
Does LM239ADRE4 support single-supply operation?
Yes, LM239ADRE4 is explicitly designed for single-supply operation from 2 V to 36 V. Its input common-mode range extends from ground to VCC – 2 V, and outputs are open-collector, allowing direct interface to pull-up voltages independent of VCC. This architecture eliminates the need for dual supplies in applications like sensor thresholding or power rail monitoring, simplifying system power design.
What is the maximum differential input voltage rating for LM239ADRE4?
The LM239ADRE4 supports a maximum differential input voltage of ±36 V, as defined in its Absolute Maximum Ratings table. This rating applies between any IN+ and IN– pair and ensures safe operation even when inputs are driven from separate voltage domains-such as comparing a 24 V sensor output against a 5 V reference-without internal damage or latch-up.
Can LM239ADRE4 replace older LM339 variants on existing PCBs?
Yes, LM239ADRE4 uses the same SOIC-14 package and pinout as LM339, LM239, and LM2901 devices. It is a direct drop-in replacement for LM239A-grade designs, offering identical electrical behavior plus enhanced 2 kV HBM ESD protection. No PCB layout changes are needed, and firmware or external circuitry remains fully compatible.
What load can LM239ADRE4 drive at its output pins?
Each open-collector output of LM239ADRE4 can sink up to 6 mA minimum at 1.5 V output voltage (VOL), per the Electrical Characteristics table. With appropriate external pull-up resistors (e.g., 10 kΩ to 5 V), it reliably drives TTL inputs, LEDs, optocouplers, and logic-level MOSFET gates-enabling direct interfacing without buffer stages in most industrial control applications.
LM239ADRE4 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Package/Case:
- 14-SOIC (0.154", 3.90mm Width)
- Series:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Type:
- General Purpose
- Number of Elements:
- 4
- Output Type:
- Open-Collector
- Voltage - Supply, Single/Dual (±):
- 2V ~ 30V, ±1V ~ 15V
- :
- 3mV @ 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-SOIC
LM239ADRE4 FAQ
1.How can I place an order for LM239ADRE4 through Aetrix?
Please submit a Request for Quotation (RFQ) for LM239ADRE4 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 LM239ADRE4 reliable?
The price and inventory of LM239ADRE4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM239ADRE4 is usually 5 days.
3.What payment methods are accepted for LM239ADRE4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM239ADRE4 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM239ADRE4?
LM239ADRE4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM239ADRE4 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 LM239ADRE4?
For technical support, including LM239ADRE4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM239ADRE4 requirements.
6.How does Aetrix verify that LM239ADRE4 is sourced from the original manufacturer or authorized distributors?
All LM239ADRE4 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 LM239ADRE4 meets industry standards.
7.What is the process for return or replacement of LM239ADRE4?
All LM239ADRE4 units undergo pre-shipment inspection (PSI). If there is an issue with LM239ADRE4, 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 LM239ADRE4 part is unused and in its original packaging.
Return procedure for LM239ADRE4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LM239ADRE4 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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