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Texas Instruments LM239DE4
- Part No.:
- LM239DE4
- Manufacturer:
- Texas Instruments
- Category:
- Comparators
- Package:
- 14-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
LM239DE4.pdf
- Description:
- IC COMPARATOR 4 DIFF 14SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:2,922
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Product details
Overview
LM239DE4 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 threshold detector in industrial power supply monitoring and motor control feedback circuits.
For engineers reviewing the LM239DE4 datasheet, LM239DE4 pinout, LM239DE4 application, or LM239DE4 equivalent, this page delivers verified electrical specifications, SOIC-14 package details, real-world use cases in server PSUs and factory automation, and two confirmed alternative parts with documented functional differences.
Technical Context
The LM239DE4 implements four independent open-collector comparators with rail-to-rail common-mode input range extending to ground and up to VCC – 2 V. Its internal architecture supports direct TTL/MOS/CMOS interfacing without pull-up resistors on outputs when used with external pull-ups.
It operates over –25°C to +85°C ambient temperature, draws 0.8–1.2 mA total quiescent current (all four comparators), and maintains stable performance across supply voltages from 2 V to 36 V - enabling robust operation in wide-input industrial DC rails and battery-backed systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 2 V to 36 V - supports direct integration into 3.3 V, 5 V, 12 V, and 24 V industrial power domains |
| Input Offset Voltage (max) | ±9 mV over temperature - ensures reliable threshold detection within ±10 mV accuracy at full operating range |
| Input Bias Current (typ) | 25 nA - minimizes loading error on high-impedance sensor inputs like thermistor dividers |
| Propagation Delay | 1.3 µs (100 mV step) - enables sub-microsecond response for overvoltage latch and fast fault detection |
| Output Type | Open-collector - allows wired-OR logic, level translation, and flexible pull-up to any logic rail up to 36 V |
| Common-Mode Input Range | Ground to VCC – 2 V - permits direct sensing of signals referenced to system ground or mid-rail references |
| ESD Rating (HBM) | 2000 V - meets standard industrial handling requirements without additional protection circuitry |
Pinout & Package
LM239DE4 is housed in a 14-pin SOIC (D) package measuring 8.70 mm × 3.90 mm, with standard JEDEC MS-012AC footprint and gull-wing leads compatible with automated SMT assembly.
| 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 | Differential input node; accepts voltage down to –0.3 V below ground |
| 3 (IN1+) | Comparator 1 non-inverting input | Differential input node; supports common-mode range to VCC – 2 V |
| 4 (VCC) | Positive supply | Single supply rail connection; supports 2 V to 36 V operation |
| 5 (OUT2) | Comparator 2 output | Independent open-collector output; electrically isolated from OUT1 |
| 6 (IN2−) | Comparator 2 inverting input | Second differential pair input; identical electrical behavior to IN1− |
| 7 (IN2+) | Comparator 2 non-inverting input | Second differential pair input; identical electrical behavior to IN1+ |
| 8 (GND) | Negative supply / reference | System ground return; all inputs referenced to this node |
| 9 (IN3−) | Comparator 3 inverting input | Third differential pair input; shares same specs and tolerance as IN1−/IN2− |
| 10 (IN3+) | Comparator 3 non-inverting input | Third differential pair input; supports full common-mode range |
| 11 (IN4−) | Comparator 4 inverting input | Fourth differential pair input; fully independent channel |
| 12 (IN4+) | Comparator 4 non-inverting input | Fourth differential pair input; no crosstalk with other channels |
| 13 (OUT3) | Comparator 3 output | Open-collector output; pin-compatible with OUT1 and OUT2 |
| 14 (OUT4) | Comparator 4 output | Final open-collector output; supports same sink current and voltage ratings |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail input common-mode range | Operates with inputs at ground potential - eliminates need for level-shifting in low-side current sensing |
| Open-collector outputs | Enables wired-AND functionality and interface to mixed-voltage logic families (TTL, CMOS, MOS) |
| Wide supply voltage range | 2 V to 36 V operation supports both low-power microcontroller domains and high-voltage industrial rails |
| Low input bias current | 25 nA typical - preserves accuracy in high-impedance voltage divider networks and sensor interfaces |
| Fast propagation delay | 1.3 µs response time - suitable for real-time overvoltage lockout and PWM feedback timing |
Applications
| Server Power Supply Monitoring | Factory Automation Sensor Interface |
|---|---|
Use Scenario: Detecting undervoltage and overvoltage conditions on +12 V and +5 V rails in redundant server PSUs. IC Role / Device Role / Timing Role: Quad comparator configured as independent window comparators per rail, driving fault latches and status LEDs. Use Value: Enables precise ±5 % voltage window detection with 1.3 µs response, preventing false trips during transient load steps. | Use Scenario: Converting analog 0–10 V position feedback from linear actuators into digital ON/OFF control signals. IC Role / Device Role / Timing Role: Threshold comparator translating analog sensor output into clean logic-level signals for PLC input modules. Use Value: 25 nA input bias current avoids loading errors on high-Z sensor outputs, preserving linearity and repeatability. |
| Motor Drive Overcurrent Protection | Building HVAC Zone Control |
Use Scenario: Monitoring shunt resistor voltage drops to trigger immediate shutdown during phase current faults in BLDC inverters. IC Role / Device Role / Timing Role: High-speed comparator detecting >100 mV overcurrent event and asserting hardware disable signal to gate driver. Use Value: 1.3 µs propagation delay ensures fault response within one switching cycle at 500 kHz PWM frequency. | Use Scenario: Comparing temperature sensor output against setpoint thresholds to activate heating/cooling valves in multi-zone HVAC systems. IC Role / Device Role / Timing Role: Precision comparator implementing hysteresis-based thermostat logic with adjustable deadband. Use Value: ±9 mV max input offset ensures consistent trip points across –25°C to +85°C, reducing calibration drift in field deployments. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar quad differential comparator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM239DR | Same SOIC-14 package, identical electrical specs, tape-and-reel packaging instead of tube | No functional difference; optimized for automated pick-and-place assembly | Select LM239DR for high-volume SMT production requiring reel delivery |
| LM339N | PDIP-14 package, wider temperature range (0°C to 70°C), higher max input offset (±9 mV same), same 1.3 µs delay | Preferred for through-hole prototyping and legacy board upgrades where SOIC footprint unavailable | Choose LM339N only when PDIP mounting is required or for lab validation before SOIC migration |
Compared with LM239DR and LM339N, the LM239DE4 offers identical core comparator performance in a tube-packaged SOIC-14 variant - making it ideal for low-to-mid volume industrial designs requiring hand-soldering flexibility and JEDEC-standard surface-mount compatibility.
Availability
LM239DE4 is available at Aetrix Electronics and suitable for server PSU monitoring, factory automation sensor interfaces, and motor drive overcurrent protection requiring stable component supply, long-term industrial lifecycle support, and traceable sourcing.
Supply support for LM239DE4 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 personal electronics markets.
The LM239 family was engineered for cost-sensitive, high-reliability industrial applications demanding robust single-supply comparators with wide voltage range, ESD resilience, and proven field longevity.
FAQ
What is the maximum supply voltage rating for LM239DE4?
The LM239DE4 has an absolute maximum supply voltage rating of 36 V, with recommended operating range from 2 V to 36 V. This allows direct use in 24 V industrial control systems and 12 V automotive auxiliary rails without regulation. Exceeding 36 V risks permanent damage per TI's Absolute Maximum Ratings table.
Does LM239DE4 support rail-to-rail input operation?
Yes, the LM239DE4 supports rail-to-rail common-mode input voltage from ground (V–) up to VCC – 2 V. Either input can extend to the full VCC level without damage, and correct output state is maintained as long as at least one input remains within the valid common-mode range.
Can LM239DE4 outputs drive TTL logic directly?
Yes, LM239DE4 outputs are open-collector and fully compatible with TTL logic when used with a pull-up resistor to 5 V. The device sinks up to 20 mA per output, meeting standard TTL input current requirements while allowing flexible voltage translation to 3.3 V or 12 V logic levels via appropriate pull-up selection.
What is the input offset voltage specification for LM239DE4?
The LM239DE4 has a maximum input offset voltage of ±9 mV over its full operating temperature range of –25°C to +85°C. At 25°C, typical offset is ±3 mV. This value is confirmed in TI's LMx39/LMx39A Electrical Characteristics table and defines worst-case threshold accuracy in precision level-detection applications.
Is LM239DE4 pin-compatible with LM339N?
Yes, LM239DE4 and LM339N share identical pinout, electrical characteristics, and SOIC-14 (LM239DE4) vs. PDIP-14 (LM339N) mechanical form factors. Both belong to the same LMx39 family and support drop-in replacement in existing designs - though LM239DE4 is rated for –25°C to +85°C while LM339N covers 0°C to 70°C.
LM239DE4 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Package/Case:
- 14-SOIC (0.154", 3.90mm Width)
- Series:
- -
- Packaging:
- Tube
- Product Status:
- Obsolete
- 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-SOIC
LM239DE4 FAQ
1.How can I place an order for LM239DE4 through Aetrix?
Please submit a Request for Quotation (RFQ) for LM239DE4 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 LM239DE4 reliable?
The price and inventory of LM239DE4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM239DE4 is usually 5 days.
3.What payment methods are accepted for LM239DE4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM239DE4 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM239DE4?
LM239DE4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM239DE4 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 LM239DE4?
For technical support, including LM239DE4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM239DE4 requirements.
6.How does Aetrix verify that LM239DE4 is sourced from the original manufacturer or authorized distributors?
All LM239DE4 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 LM239DE4 meets industry standards.
7.What is the process for return or replacement of LM239DE4?
All LM239DE4 units undergo pre-shipment inspection (PSI). If there is an issue with LM239DE4, 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 LM239DE4 part is unused and in its original packaging.
Return procedure for LM239DE4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LM239DE4 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
-
LM239DR
Texas Instruments
-
LM339APWR
Texas Instruments
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LM2903P
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LM393ADR
Texas Instruments
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NCX2200GMAZ
NXP Semiconductors
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