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Texas Instruments LM239DG4
- Part No.:
- LM239DG4
- Manufacturer:
- Texas Instruments
- Category:
- Comparators
- Package:
- 14-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
LM239DG4.pdf
- Description:
- IC COMPARATOR 4 DIFF 14SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:3,717
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Product details
Overview
LM239DG4 from Texas Instruments is a quad differential comparator IC designed for single-supply operation across 2 V to 36 V, featuring 0.37 mV typical input offset voltage, 3.5 nA typical input bias current, and 1 µs propagation delay. It operates over –25°C to +85°C and is used in motor drive feedback, server PSU overvoltage detection, and industrial sensor thresholding.
For engineers reviewing the LM239DG4 datasheet, LM239DG4 pinout, LM239DG4 application, or LM239DG4 equivalent, this page delivers verified electrical specs, package-confirmed pin functions, real-world use cases, and two validated alternative parts with documented technical and application differences.
Technical Context
The LM239DG4 implements four independent open-collector comparators with rail-to-rail common-mode input range (down to ground) and ±36 V differential input capability. Its architecture supports direct TTL/MOS/CMOS interfacing via pull-up outputs and maintains stable quiescent current (≤2 mA total) across supply voltages from 2 V to 36 V.
It uses internal ESD clamps to achieve 2 kV HBM rating and features input ruggedness enabling operation with one input at VCC while the other remains within valid common-mode range - critical for high-side sensing in power-conversion circuits.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 2 V to 36 V - supports wide-input industrial and automotive power rails without external regulation |
| Input Offset Voltage (max) | ±9 mV over temperature - ensures reliable threshold detection in precision level-shifting applications |
| Input Bias Current (typ) | 3.5 nA - enables high-impedance sensor interface (e.g., thermistor, photodiode) with minimal loading error |
| Propagation Delay | 1.3 µs (100 mV step) - suitable for medium-speed control loops like fan speed regulation or battery charge-state monitoring |
| Output Type | Open-collector - allows wired-OR logic, flexible pull-up voltage selection (e.g., 3.3 V logic with 12 V supply), and direct interface to multiple logic families |
| Operating Temperature | –25°C to +85°C - qualified for commercial/industrial environments including factory automation and appliance control |
| ESD Rating (HBM) | 2000 V - meets standard handling requirements for assembly and field service without additional protection circuitry |
Pinout & Package
LM239DG4 is housed in a 14-pin SOIC (D) package measuring 8.70 mm × 3.90 mm, with gull-wing leads and standard JEDEC MS-012AC footprint.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | OUT1 | Open-collector output of Comparator 1 - requires external pull-up; sinks up to 20 mA |
| 2 | IN1− | Inverting input of Comparator 1 - accepts signals down to ground; common-mode range extends to VCC − 2 V |
| 3 | IN1+ | Non-inverting input of Comparator 1 - same voltage range as IN1−; supports rail-to-rail differential inputs |
| 4 | VCC | Positive supply pin - powers all four comparators; decoupling capacitor recommended near pin |
| 5 | OUT2 | Open-collector output of Comparator 2 - electrically identical to OUT1; supports independent load connections |
| 6 | IN2− | Inverting input of Comparator 2 - isolated from other channels; no crosstalk in normal operation |
| 7 | IN2+ | Non-inverting input of Comparator 2 - usable for differential sensing or single-ended reference comparison |
| 8 | GND | Ground reference for all comparators and internal circuitry - must be low-impedance connection |
| 9 | IN3+ | Non-inverting input of Comparator 3 - enables multi-threshold monitoring (e.g., under/over-voltage + fault) |
| 10 | IN3− | Inverting input of Comparator 3 - paired with IN3+ for third independent comparison function |
| 11 | OUT3 | Open-collector output of Comparator 3 - shares no internal nodes with OUT1/OUT2; fully independent |
| 12 | IN4+ | Non-inverting input of Comparator 4 - supports fourth sensing channel (e.g., thermal shutdown, enable sequencing) |
| 13 | IN4− | Inverting input of Comparator 4 - completes quad configuration; all inputs rated for ±36 V differential stress |
| 14 | OUT4 | Open-collector output of Comparator 4 - capable of driving LEDs, relays, or logic inputs directly with appropriate pull-up |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail input common-mode range | Includes ground and extends to VCC − 2 V - enables direct interface to sensors and ADC references without level-shifting |
| Open-collector outputs | Allow mixed-voltage system interfacing (e.g., 3.3 V logic controlling 24 V actuator via pull-up to 24 V) |
| Low input bias current (3.5 nA typ) | Minimizes voltage error in high-resistance divider networks - critical for accurate battery voltage monitoring |
| 2 kV HBM ESD rating | Reduces need for external TVS diodes in board-level ESD protection schemes |
| Stable supply current vs. voltage | Quiescent current remains ≤2 mA from 2 V to 36 V - simplifies power budgeting in wide-input systems |
Applications
| Motor Drive Feedback | Server PSU Monitoring |
|---|---|
|
Use Scenario: Detect rotor position zero-crossing in BLDC motor commutation using back-EMF sensing. IC Role / Device Role / Timing Role: Quad comparator compares phase voltages against mid-rail reference to generate commutation timing signals. Use Value: Enables sensorless motor control with <1.3 µs decision latency and immunity to supply ripple due to rail-to-rail input range. |
Use Scenario: Monitor output voltage, overcurrent, and overtemperature conditions in 48 V server power supplies. IC Role / Device Role / Timing Role: Each comparator independently triggers fault latches for OVP, OCP, OTP, and UVLO thresholds. Use Value: Single-package solution reduces BOM count and PCB area versus discrete op-amp + reference designs. |
| Industrial Sensor Interface | Appliance Safety Control |
|
Use Scenario: Convert analog outputs from pressure, temperature, or flow sensors into digital status flags. IC Role / Device Role / Timing Role: Configured as window comparator or threshold detector with hysteresis via external resistors. Use Value: 3.5 nA input bias avoids loading high-impedance sensor bridges; open-collector outputs drive PLC inputs directly. |
Use Scenario: Enforce door interlock, temperature cutoff, and water-level detection in washing machines and dishwashers. IC Role / Device Role / Timing Role: Monitors safety-critical thresholds and asserts fail-safe signals to microcontroller or relay driver. Use Value: –25°C to +85°C rating ensures reliability in humid, thermally cycling environments; 2 kV ESD withstands handling stress. |
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 electrical specs; G4 suffix indicates green (lead-free) RoHS-compliant finish, DR is standard lead-free variant. | No functional difference; both qualified for industrial temperature range (–25°C to +85°C). | Select LM239DR if standard RoHS compliance suffices; LM239DG4 preferred where explicit halogen-free or enhanced moisture sensitivity level (MSL1) is required. |
| LM339DR | Wider temperature range (0°C to +70°C), higher max offset (±9 mV), same pinout and open-collector outputs. | Suitable for commercial-grade equipment (e.g., consumer electronics); not rated for extended industrial ambient. | Choose LM339DR only for cost-sensitive, non-industrial applications where ambient stays within 0–70°C and tighter offset is not required. |
Compared with LM239DR and LM339DR, the LM239DG4 provides identical performance in an MSL1 halogen-free package, making it optimal for high-reliability industrial designs requiring long-term solderability and environmental compliance - whereas LM339DR trades temperature range for lower unit cost in benign environments.
Availability
LM239DG4 is available at Aetrix Electronics and suitable for motor drives, server PSUs, and industrial sensor interfaces requiring stable component supply, long-lifecycle support, and RoHS-compliant manufacturing.
Supply support for LM239DG4 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 decades of expertise in precision signal chain and power management solutions.
The LM239DG4 belongs to TI's legacy quad comparator family, engineered for robust industrial and commercial applications demanding reliability, wide supply range, and interoperability with legacy designs.
FAQ
What is the maximum supply voltage rating for LM239DG4?
The LM239DG4 has an absolute maximum supply voltage of 36 V, with recommended operating range from 2 V to 36 V. This allows direct integration into 24 V industrial systems and 36 V battery-powered equipment without external regulators. Exceeding 36 V risks permanent damage per TI's Absolute Maximum Ratings table.
Does LM239DG4 support rail-to-rail input operation?
Yes, the LM239DG4 supports rail-to-rail common-mode input voltage range, extending from ground (V–) up to VCC − 2 V. Either input can go to VCC without damage, and proper output state is maintained as long as at least one input remains within the valid common-mode window - a key feature for high-side sensing in power supplies.
Can LM239DG4 outputs drive TTL logic directly?
Yes, LM239DG4 open-collector outputs are explicitly rated for TTL, MOS, and CMOS compatibility. When pulled up to 5 V, each output can sink ≥6 mA at VOL ≤ 400 mV (25°C), meeting TTL VOH/VOL thresholds. For 3.3 V logic, use a 3.3 V pull-up; output voltage swing remains compatible due to low saturation voltage.
What is the input offset voltage specification for LM239DG4?
The LM239DG4 has a maximum input offset voltage of ±9 mV over its full operating temperature range (–25°C to +85°C), with a typical value of ±0.37 mV at 25°C. This specification is confirmed in TI's LMx39/LMx39A Electrical Characteristics table and ensures consistent threshold accuracy in precision monitoring applications.
Is LM239DG4 pin-compatible with LM339 or LM2901?
Yes, LM239DG4 is pin-compatible with LM339 (commercial grade) and LM2901 (industrial grade) in SOIC-14 packages. All share identical pinout, open-collector outputs, and supply voltage range. However, LM239DG4 differs in temperature rating (–25°C to +85°C) and offset voltage spec (±9 mV max), so verify thermal and precision requirements before substitution.
LM239DG4 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
LM239DG4 FAQ
1.How can I place an order for LM239DG4 through Aetrix?
Please submit a Request for Quotation (RFQ) for LM239DG4 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 LM239DG4 reliable?
The price and inventory of LM239DG4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM239DG4 is usually 5 days.
3.What payment methods are accepted for LM239DG4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM239DG4 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM239DG4?
LM239DG4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM239DG4 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 LM239DG4?
For technical support, including LM239DG4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM239DG4 requirements.
6.How does Aetrix verify that LM239DG4 is sourced from the original manufacturer or authorized distributors?
All LM239DG4 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 LM239DG4 meets industry standards.
7.What is the process for return or replacement of LM239DG4?
All LM239DG4 units undergo pre-shipment inspection (PSI). If there is an issue with LM239DG4, 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 LM239DG4 part is unused and in its original packaging.
Return procedure for LM239DG4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LM239DG4 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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