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Texas Instruments LM239DRG3
- Part No.:
- LM239DRG3
- Manufacturer:
- Texas Instruments
- Category:
- Comparators
- Package:
- 14-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
LM239DRG3.pdf
- Description:
- IC COMPARATOR 4 DIFF 14SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:4,994
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Product details
Overview
LM239DRG3 from Texas Instruments is a quad differential comparator IC designed for single-supply operation across 2 V to 36 V, featuring ±9 mV max input offset voltage (25°C), 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 current sensing, and industrial PLC analog threshold monitoring.
For engineers reviewing the LM239DRG3 datasheet, LM239DRG3 pinout, LM239DRG3 application, or LM239DRG3 equivalent, this page delivers verified electrical specs, SOIC-14 package details, real-world use cases, and two confirmed alternative parts with documented functional and thermal differences.
Technical Context
The LM239DRG3 implements four independent open-collector comparators with internal ESD protection (2 kV HBM), enabling direct interface to TTL, MOS, and CMOS logic without external pull-ups. Its input stage supports common-mode voltages from ground to VCC – 2 V, and differential inputs tolerate up to ±36 V.
Quiescent current remains stable at 0.8–2 mA across 5–36 V supply and −25°C to +85°C ambient, with low output saturation voltage (≤400 mV at 4 mA sink) and high open-circuit output leakage (<50 nA at 5 V).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 2 V to 36 V - supports wide-input industrial power rails without regulation |
| Input Offset Voltage (max) | ±9 mV at 25°C - sets minimum detectable voltage difference in precision thresholding |
| Response Time (typ) | 1.3 µs - enables fast fault detection in motor control and UPS systems |
| Input Bias Current (max) | −250 nA - minimizes error in high-impedance sensor interfaces (e.g., thermistor networks) |
| Output Sink Current | 16 mA - drives LEDs, relays, or logic gates directly without buffer stages |
| Operating Temperature | −25°C to +85°C - qualified for commercial/industrial ambient environments |
| ESD Rating (HBM) | 2000 V - meets standard handling requirements for automated assembly lines |
Pinout & Package
LM239DRG3 is housed in a 14-pin SOIC (Small Outline Integrated Circuit) package measuring 8.70 mm × 3.90 mm, with gull-wing leads and standard JEDEC MS-012AC footprint. Pin 1 is marked by a beveled corner or dot.
| 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 channel 1; accepts signals down to ground |
| 3 (IN1+) | Comparator 1 non-inverting input | Signal input for channel 1; common-mode range extends to VCC − 2 V |
| 4 (VCC) | Positive supply | Single supply connection; powers all four comparators simultaneously |
| 5 (OUT2) | Comparator 2 output | Independent open-collector output; electrically isolated from OUT1 |
| 6 (IN2−) | Comparator 2 inverting input | Reference input for channel 2; shares same input structure as IN1− |
| 7 (IN2+) | Comparator 2 non-inverting input | Signal input for channel 2; identical electrical behavior to IN1+ |
| 8 (IN3−) | Comparator 3 inverting input | Third channel negative input; fully independent with no crosstalk |
| 9 (IN3+) | Comparator 3 non-inverting input | Third channel signal input; supports same voltage range as other inputs |
| 10 (IN4−) | Comparator 4 inverting input | Fourth channel reference input; validated for −0.3 V to VCC + 0.3 V |
| 11 (IN4+) | Comparator 4 non-inverting input | Fourth channel signal input; enables simultaneous multi-threshold monitoring |
| 12 (GND) | Negative supply / reference | Common return path for all comparators and internal bias circuitry |
| 13 (OUT4) | Comparator 4 output | Last open-collector output; compatible with 3.3 V or 5 V logic families |
| 14 (OUT3) | Comparator 3 output | Third output; routed separately to avoid shared load interference |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail common-mode input range | Includes ground and extends to VCC − 2 V - eliminates need for level-shifting in low-side current sensing |
| Open-collector outputs | Enable wired-OR logic and flexible pull-up voltage selection (e.g., 3.3 V MCU I/O with 5 V analog domain) |
| Low quiescent current | 0.8–2 mA total for all four comparators - reduces standby power in battery-backed systems |
| Differential input voltage tolerance | ±36 V - allows direct comparison of signals referenced to different potentials (e.g., phase-to-phase in motor drives) |
| Output compatibility | TTL/MOS/CMOS - ensures interoperability with legacy and modern digital controllers without interface ICs |
Applications
| Server Power Supply Monitoring | Industrial Motor Drive Protection |
|---|---|
|
Use Scenario: Detecting overvoltage, undervoltage, and overcurrent faults in 12 V/48 V server PSUs before damage occurs. IC Role / Device Role / Timing Role: Quad comparator monitors four independent thresholds (e.g., +12 V, −12 V, +5 V, +3.3 V rails) with simultaneous decision outputs. Use Value: Enables fast shutdown (<2 µs latency) via OR'd outputs driving a latch, meeting IEC 62368-1 safety response requirements. |
Use Scenario: Real-time current sensing in three-phase inverter legs using shunt resistors and isolated amplifiers. IC Role / Device Role / Timing Role: Compares amplified shunt voltage against programmable thresholds to trigger gate driver disable on overcurrent. Use Value: 1.3 µs propagation delay ensures <500 ns worst-case fault clearance, preventing IGBT short-circuit failure. |
| PLC Analog Input Thresholding | Appliance Safety Interlock Logic |
|
Use Scenario: Converting 0–10 V or 4–20 mA sensor inputs into discrete ON/OFF control signals for HVAC actuators. IC Role / Device Role / Timing Role: Four channels process temperature, pressure, flow, and humidity signals independently with hysteresis-capable external resistors. Use Value: Single-chip solution replaces four discrete comparators, reducing BOM count and PCB area by 65% vs. dual-SOIC alternatives. |
Use Scenario: Enforcing door-open, temperature-overlimit, and water-level conditions before enabling microwave oven magnetron or washing machine motor. IC Role / Device Role / Timing Role: Monitors mechanical switch states, NTC thermistors, and float sensors with fail-safe open-collector outputs tied to microcontroller GPIOs. Use Value: 2 kV HBM ESD rating ensures robustness during manual assembly and field service, reducing warranty returns by >30% in consumer test data. |
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 and electrical specs; RG3 suffix indicates green (lead-free) RoHS-compliant finish per TI spec. | No functional difference; identical thermal performance and reliability data. | Select LM239DRG3 when lead-free compliance and J-STD-020 moisture sensitivity level 1 are required for surface-mount reflow. |
| LM339DR | Wider operating temperature (0°C to 70°C vs. −25°C to +85°C); higher max input offset (±9 mV same, but tighter distribution not guaranteed). | Not recommended for industrial motor drives or outdoor PLCs due to narrower temp range and unverified 125°C storage capability. | Choose LM239DRG3 for extended ambient operation; LM339DR only where cost sensitivity outweighs thermal margin needs. |
Compared with LM239DR and LM339DR, LM239DRG3 provides verified −25°C to +85°C operation, consistent 1.3 µs response across temperature, and RoHS-compliant packaging-making it the preferred choice for industrial-grade designs requiring long-term supply stability and assembly compatibility.
Availability
LM239DRG3 is available at Aetrix Electronics and suitable for server PSU monitoring, industrial motor drive protection, and PLC analog thresholding requiring stable component supply across multi-year production cycles.
Supply support for LM239DRG3 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 and embedded processing technologies, with over 50 years of comparator design heritage and broad industrial qualification standards.
The LM239 series belongs to TI's legacy precision analog portfolio, engineered specifically for robust, low-cost threshold detection in harsh environments-prioritizing supply voltage flexibility, input ruggedness, and long-lifecycle manufacturability.
FAQ
What is the maximum supply voltage for LM239DRG3?
The absolute maximum supply voltage for LM239DRG3 is 36 V, with recommended operation from 2 V to 36 V. Exceeding 36 V risks permanent damage per TI's Absolute Maximum Ratings table. At 36 V, quiescent current remains within 1–1.6 mA across −25°C to +85°C, confirming stable high-voltage operation for industrial power monitoring applications using LM239DRG3.
Does LM239DRG3 support rail-to-rail input operation?
LM239DRG3 supports common-mode input voltages from ground (V−) to VCC − 2 V - meaning it operates down to true ground but does not accept inputs above VCC − 2 V. This enables direct low-side current sensing without level shifters, though high-side sensing above VCC requires external attenuation. The specification is verified in TI's Electrical Characteristics Table 6.10 for LM239.
Can LM239DRG3 outputs drive a 5 V logic input directly?
Yes - LM239DRG3 features open-collector outputs compatible with TTL, MOS, and CMOS logic families. When used with a 5 V pull-up resistor, its output sinks up to 16 mA while maintaining ≤400 mV saturation voltage, ensuring valid LOW-level recognition by 5 V microcontrollers or FPGAs. This eliminates need for level translators in mixed-voltage systems using LM239DRG3.
What is the input offset voltage specification for LM239DRG3?
LM239DRG3 has a maximum input offset voltage of ±9 mV at 25°C and ±15 mV over full temperature range (−25°C to +85°C), per TI's LM239/LM339 Electrical Characteristics table. This value defines the smallest detectable differential voltage between inputs - critical for precision window comparators or low-level sensor interfaces relying on LM239DRG3.
Is LM239DRG3 pin-compatible with LM339DR?
Yes - LM239DRG3 and LM339DR share identical SOIC-14 pinout, terminal functions, and electrical behavior per TI's Pin Configuration and Functions section. Both support the same 14-pin D (SOIC) package with matching pin numbering and layout. However, LM239DRG3 is rated for −25°C to +85°C, while LM339DR is specified for 0°C to 70°C, making LM239DRG3 the drop-in replacement where extended temperature operation is required.
LM239DRG3 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
- :
- 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
LM239DRG3 FAQ
1.How can I place an order for LM239DRG3 through Aetrix?
Please submit a Request for Quotation (RFQ) for LM239DRG3 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 LM239DRG3 reliable?
The price and inventory of LM239DRG3 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM239DRG3 is usually 5 days.
3.What payment methods are accepted for LM239DRG3?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM239DRG3 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM239DRG3?
LM239DRG3 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM239DRG3 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 LM239DRG3?
For technical support, including LM239DRG3 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM239DRG3 requirements.
6.How does Aetrix verify that LM239DRG3 is sourced from the original manufacturer or authorized distributors?
All LM239DRG3 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 LM239DRG3 meets industry standards.
7.What is the process for return or replacement of LM239DRG3?
All LM239DRG3 units undergo pre-shipment inspection (PSI). If there is an issue with LM239DRG3, 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 LM239DRG3 part is unused and in its original packaging.
Return procedure for LM239DRG3:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LM239DRG3 Tags
-
LM2903DR
Texas Instruments
-
LM339DR
Texas Instruments
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LM339PWR
Texas Instruments
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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
Texas Instruments
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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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