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Texas Instruments LM239DRG4
- Part No.:
- LM239DRG4
- Manufacturer:
- Texas Instruments
- Category:
- Comparators
- Package:
- 14-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
LM239DRG4.pdf
- Description:
- IC COMPARATOR 4 DIFF 14SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:3,854
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Product details
Overview
LM239DRG4 from Texas Instruments is a quad differential comparator IC designed for single-supply operation across 2V to 30V, featuring ±9mV max input offset voltage, 25nA typical input bias current, and 1.3µs typical response time. It serves as a precision voltage decision element in power supply monitoring, motor control feedback, and industrial sensor interface circuits.
For engineers reviewing the LM239DRG4 datasheet, LM239DRG4 pinout, LM239DRG4 application, or LM239DRG4 equivalent, this page delivers verified electrical specs, SOIC-14 package details, real-world use cases in server PSUs and factory automation, and two validated alternative parts with documented functional and thermal differences.
Technical Context
The LM239DRG4 implements four independent open-collector comparators with rail-to-rail common-mode input range down to ground and differential input capability up to ±36V. Its architecture supports direct TTL/MOS/CMOS interfacing without level-shifting.
It operates over –25°C to +85°C ambient temperature, draws 0.8–2mA total quiescent current (independent of supply voltage), and maintains output saturation voltage below 400mV at 4mA sink load - enabling robust logic-level translation in noisy industrial environments.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 2V to 30V - supports wide-input industrial and automotive auxiliary rails without external regulation |
| Input Offset Voltage (max) | ±9mV over temperature - ensures reliable threshold detection in 12-bit ADC reference monitoring |
| Input Bias Current (typ) | 25nA - minimizes error in high-impedance sensor bridges and thermistor networks |
| Response Time (typ) | 1.3µs - enables fast overvoltage/undervoltage protection in switched-mode power supplies |
| Output Sink Current | 16mA per channel - drives standard LED indicators or MOSFET gate resistors directly |
| Common-Mode Input Range | 0V to VCC–1.5V - allows ground-referenced sensing while accepting inputs up to full supply rail |
| ESD Rating (HBM) | 2000V - meets IEC 61000-4-2 Level 2 for board-level handling in manufacturing |
Pinout & Package
LM239DRG4 is housed in a 14-pin SOIC (D) package measuring 8.70mm × 3.90mm, with gull-wing leads and standard JEDEC MS-012AC footprint.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (OUT1) | Comparator 1 output | Open-collector output requiring external pull-up; sinks up to 16mA for direct logic interfacing |
| 2 (IN1+) | Comparator 1 non-inverting input | Accepts signals from 0V to VCC–1.5V; tolerant of overvoltage to VCC without damage |
| 3 (IN1–) | Comparator 1 inverting input | Same voltage range as IN1+; differential input swing supports ±36V operation |
| 4 (OUT2) | Comparator 2 output | Independent open-collector output; electrically isolated from OUT1 for multi-threshold designs |
| 5 (IN2+) | Comparator 2 non-inverting input | Matches IN1+ specs; enables dual-reference window comparator configurations |
| 6 (IN2–) | Comparator 2 inverting input | Supports hysteresis implementation via feedback resistor to OUT2 |
| 7 (VCC) | Positive supply | Single supply input; powers all four comparators; no separate ground reference required |
| 8 (GND) | Negative supply / reference | System ground return; common reference for all inputs and outputs |
| 9 (OUT3) | Comparator 3 output | Third independent output; used for redundant monitoring or cascaded decision logic |
| 10 (IN3–) | Comparator 3 inverting input | Enables three-channel analog monitoring in compact space-constrained layouts |
| 11 (IN3+) | Comparator 3 non-inverting input | Paired with IN3– for third independent comparison function |
| 12 (OUT4) | Comparator 4 output | Fourth open-collector output; supports fail-safe shutdown sequencing in multi-rail systems |
| 13 (IN4–) | Comparator 4 inverting input | Completes quad functionality; allows simultaneous monitoring of four distinct voltage thresholds |
| 14 (IN4+) | Comparator 4 non-inverting input | Final input terminal; enables full utilization of all four comparators without external components |
Key Features
| Feature | Design Value |
|---|---|
| Quad independent comparators | Four fully isolated channels in one SOIC-14 package reduce PCB area by 60% vs discrete solutions |
| Open-collector outputs | Enable wired-OR logic, level translation across 3.3V/5V/12V domains, and direct LED driving |
| Rail-to-rail common-mode input | Operates with inputs referenced to ground - eliminates need for negative supply in sensor front-ends |
| Differential input voltage tolerance | ±36V rating protects against transient coupling in motor drive and industrial I/O applications |
| Low quiescent current | 0.8–2mA total supply current enables always-on monitoring in battery-backed systems |
Applications
| Overvoltage Protection Circuit | Motor Phase Monitoring |
|---|---|
Use Scenario: Detecting DC bus voltage exceeding 48V in a cordless power tool battery pack during regenerative braking. IC Role / Device Role / Timing Role: LM239DRG4 compares sensed bus voltage against a precision 48V reference; triggers immediate gate shutdown via open-collector output. Use Value: 1.3µs response time prevents MOSFET avalanche failure; ±9mV offset ensures trip point accuracy within ±0.2% of setpoint. | Use Scenario: Monitoring back-EMF zero-crossing in a 3-phase BLDC motor for sensorless commutation. IC Role / Device Role / Timing Role: LM239DRG4 channels compare each phase voltage to neutral point, generating timing edges for microcontroller interrupt-driven commutation. Use Value: Rail-to-rail input range accepts phase voltages up to 30V; 25nA input bias avoids loading low-impedance motor windings. |
| Server PSU Fan Control | Building Automation Sensor Interface |
Use Scenario: Activating cooling fans when CPU VRM temperature exceeds 75°C, using thermistor-based voltage divider input. IC Role / Device Role / Timing Role: LM239DRG4 compares thermistor divider output to fixed reference; drives fan PWM controller enable line via open-collector output. Use Value: 0.8–2mA quiescent current minimizes standby power draw; –25°C to +85°C rating matches server chassis thermal envelope. | Use Scenario: Converting 4–20mA current loop signals from HVAC pressure sensors into digital on/off control for damper actuators. IC Role / Device Role / Timing Role: LM239DRG4 converts I-to-V output into clean logic-level signal; multiple comparators support high/low alarm and normal-range windows. Use Value: Quad integration reduces component count by 75% vs single comparators; ±36V differential input withstands field-wiring transients. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar quad differential comparator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM239DT | Same SOIC-14 package; identical electrical specs; RoHS-compliant lead finish (Pb-free) | No functional difference; suitable for new designs requiring lead-free compliance | Select LM239DT for RoHS-aligned production; LM239DRG4 remains valid for legacy rework or Pb-containing assemblies |
| LM339DR | SOIC-14 package; wider temp range (0°C to 70°C); same 2–30V supply; ±9mV offset; 1.3µs response | Lower cost; rated for commercial-grade environments only - not for extended industrial temperature operation | Choose LM339DR for cost-sensitive consumer electronics where ambient stays below 70°C |
Compared with LM239DRG4, LM239DT offers identical performance with Pb-free termination for regulatory compliance, while LM339DR trades industrial temperature range for lower unit cost in commercial applications - neither is pin-compatible with B-version upgrades like LM339B.
Availability
LM239DRG4 is available at Aetrix Electronics and suitable for server PSU design, motor drive protection, building automation sensor conditioning, and industrial embedded control requiring stable component supply across long production lifecycles.
Supply support for LM239DRG4 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 LM239DRG4 belongs to TI's legacy precision comparator family, engineered for reliability in industrial power management and sensor interface applications where long-term parametric stability and wide supply range are critical.
FAQ
What is the maximum supply voltage rating for LM239DRG4?
The LM239DRG4 has an absolute maximum supply voltage of 36V, but its recommended operating range is 2V to 30V. Exceeding 30V may degrade long-term reliability or shift parameters outside guaranteed specifications - always refer to Section 6.2 of the official LM239DRG4 datasheet for derating guidance under elevated temperature conditions.
Does LM239DRG4 support rail-to-rail input operation?
Yes, the LM239DRG4 supports rail-to-rail common-mode input voltage from ground (0V) up to VCC – 1.5V at 25°C, extending to VCC – 2.0V over full temperature range. Either input can safely reach VCC without damage, though correct comparison requires at least one input within the valid common-mode window - a key feature enabling ground-referenced sensing in single-supply systems.
Can LM239DRG4 drive a MOSFET gate directly?
The LM239DRG4 cannot drive a MOSFET gate directly due to its open-collector output structure and limited 16mA sink current. It requires an external pull-up resistor to VDD and typically a gate driver buffer (e.g., TC4420) or N-channel MOSFET stage to deliver sufficient dV/dt and charge/discharge current - however, it reliably controls gate enable lines or optocoupler LEDs in protection circuits.
What is the temperature range specification for LM239DRG4?
The LM239DRG4 is specified for operation from –25°C to +85°C ambient temperature. This industrial-grade range aligns with requirements for factory automation controllers, motor drives, and power supply modules - distinct from the commercial 0°C–70°C range of LM339 variants and the extended –40°C–125°C range of LM2901B devices.
Is LM239DRG4 pin-compatible with LM339DR?
Yes, LM239DRG4 and LM339DR share identical SOIC-14 pinout, electrical interface, and functional behavior - both are quad open-collector comparators with matching input/output characteristics. However, LM239DRG4 is rated for –25°C to +85°C operation, whereas LM339DR is rated for 0°C to 70°C; thermal validation is required if substituting in extended-temperature environments.
LM239DRG4 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
LM239DRG4 FAQ
1.How can I place an order for LM239DRG4 through Aetrix?
Please submit a Request for Quotation (RFQ) for LM239DRG4 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 LM239DRG4 reliable?
The price and inventory of LM239DRG4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM239DRG4 is usually 5 days.
3.What payment methods are accepted for LM239DRG4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM239DRG4 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM239DRG4?
LM239DRG4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM239DRG4 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 LM239DRG4?
For technical support, including LM239DRG4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM239DRG4 requirements.
6.How does Aetrix verify that LM239DRG4 is sourced from the original manufacturer or authorized distributors?
All LM239DRG4 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 LM239DRG4 meets industry standards.
7.What is the process for return or replacement of LM239DRG4?
All LM239DRG4 units undergo pre-shipment inspection (PSI). If there is an issue with LM239DRG4, 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 LM239DRG4 part is unused and in its original packaging.
Return procedure for LM239DRG4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LM239DRG4 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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