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Texas Instruments LM239ADRG4
- Part No.:
- LM239ADRG4
- Manufacturer:
- Texas Instruments
- Category:
- Comparators
- Package:
- 14-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
LM239ADRG4.pdf
- Description:
- IC COMPARATOR 4 DIFF 14SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:4,203
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Product details
Overview
LM239ADRG4 from Texas Instruments is a quad differential voltage comparator in SOIC-14 package, designed for single-supply operation from 2 V to 30 V. It delivers ±9 mV max input offset voltage (over temperature), 1.3 µs typical response time, and rail-to-rail common-mode input range down to ground - enabling precise threshold detection in industrial power supplies and motor control feedback loops.
For engineers reviewing the LM239ADRG4 datasheet, LM239ADRG4 pinout, LM239ADRG4 application, or LM239ADRG4 equivalent, this page provides verified electrical specifications, validated SOIC-14 pin functions, real-world use cases in server PSUs and factory automation, and two confirmed alternative parts with documented functional and thermal differences.
Technical Context
The LM239ADRG4 implements four independent open-collector comparators with internal ESD protection (2 kV HBM), compatible with TTL, MOS, and CMOS logic families. Its input stage supports common-mode voltages from ground to VCC − 1.5 V, and differential inputs up to ±36 V - allowing direct sensing of high-side signals without level-shifting.
Quiescent current remains stable across supply voltage (0.8–2 mA total for all four comparators) and temperature (−25°C to +85°C), making it suitable for battery-backed or thermally constrained systems where supply efficiency and drift stability are critical.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 2 V to 30 V - supports wide-input industrial rails including 3.3 V, 5 V, 12 V, and 24 V systems without external regulation |
| Input Offset Voltage (max) | ±9 mV over full temperature range - ensures reliable trip-point accuracy in precision voltage monitoring applications |
| Response Time (typ) | 1.3 µs at 100 mV overdrive - enables fast fault detection in UPS and motor drive enable/disable circuits |
| Input Bias Current (max) | 250 nA - minimizes loading on high-impedance sensor sources like thermistors or photodiodes |
| Output Sink Current | 16 mA per channel - drives standard LED indicators, relay coils, or logic-level MOSFET gates directly |
| ESD Rating (HBM) | 2000 V - meets industrial handling requirements without additional board-level protection |
Pinout & Package
LM239ADRG4 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. Thermal performance is characterized by RθJA = 111.2°C/W.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (OUT1) | Comparator 1 output | Open-collector output requiring external pull-up; sinks up to 16 mA when active low |
| 2 (IN1−) | Comparator 1 inverting input | Negative reference input; accepts voltages from ground to VCC − 1.5 V |
| 3 (IN1+) | Comparator 1 non-inverting input | Signal input; same common-mode range as IN1−; differential swing up to ±36 V |
| 4 (OUT2) | Comparator 2 output | Independent open-collector output; electrically isolated from OUT1 |
| 5 (IN2−) | Comparator 2 inverting input | Second independent comparator input pair; identical specs to IN1± |
| 6 (IN2+) | Comparator 2 non-inverting input | Paired with IN2−; supports same voltage ranges and overvoltage tolerance |
| 7 (VCC) | Positive supply | Single supply pin for all four comparators; no separate ground reference required |
| 8 (GND) | Ground reference | Common return for supply and inputs; must be low-impedance for stable offset performance |
| 9 (IN3+) | Comparator 3 non-inverting input | Third comparator input; shares same electrical characteristics and layout sensitivity as IN1+/IN2+ |
| 10 (IN3−) | Comparator 3 inverting input | Third comparator input; fully independent but matched to other channels |
| 11 (OUT3) | Comparator 3 output | Third open-collector output; functionally identical to OUT1/OUT2 |
| 12 (IN4−) | Comparator 4 inverting input | Fourth comparator input; completes quad set; no crosstalk between channels |
| 13 (OUT4) | Comparator 4 output | Final output channel; supports same sink capability and logic compatibility |
| 14 (IN4+) | Comparator 4 non-inverting input | Final input pair; enables simultaneous multi-threshold comparison in compact space |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail common-mode input range | Includes ground and extends to VCC − 1.5 V - eliminates need for input biasing resistors in single-supply designs |
| Open-collector outputs | Enable wired-OR logic, level translation, and direct interface to 3.3 V/5 V/12 V logic families via external pull-up |
| Low quiescent current | 0.8–2 mA total for four comparators - reduces standby power in always-on monitoring circuits |
| Differential input voltage tolerance | ±36 V - allows safe comparison of signals referenced to different potentials (e.g., phase-to-phase in motor drives) |
| Industrial temperature range | −25°C to +85°C - qualified for deployment in factory automation, power tools, and building control environments |
Applications
| Server Power Supply Monitoring | Vacuum Robot Safety Interlock |
|---|---|
|
Use Scenario: Real-time monitoring of +12 V, +5 V, and +3.3 V rails in redundant server PSUs to trigger shutdown on undervoltage or overvoltage events. IC Role / Device Role / Timing Role: Quad comparator performs independent voltage window comparisons with hysteresis, generating fault flags for system management controller. Use Value: Enables sub-2 µs response to rail collapse, preventing data corruption during brownout conditions without microcontroller intervention. |
Use Scenario: Verifying vacuum chamber pressure, motor encoder position, and emergency stop button status before actuator activation in cleanroom vacuum robots. IC Role / Device Role / Timing Role: LM239ADRG4 compares analog sensor outputs against fixed thresholds and latches faults via external SR latch. Use Value: Provides hardware-level safety interlock with deterministic timing, meeting IEC 61508 SIL-2 requirements for fail-safe motion control. |
| Single-Phase UPS Battery Management | Factory Automation Sensor Interface |
|
Use Scenario: Detecting battery voltage thresholds (low charge, full charge, overvoltage) and AC line presence in offline UPS units. IC Role / Device Role / Timing Role: Four comparators independently monitor battery cell stack, charger enable, inverter enable, and line-sense signals. Use Value: Eliminates need for ADC and firmware polling - reduces BOM cost and improves reliability in cost-sensitive consumer UPS designs. |
Use Scenario: Converting analog outputs from temperature, flow, and proximity sensors into digital ON/OFF signals for PLC input modules. IC Role / Device Role / Timing Role: Acts as signal conditioner and level translator between 0–10 V industrial sensors and 24 V DC PLC inputs. Use Value: Supports direct connection to 24 V sinking/sourcing inputs without external transistors or optocouplers. |
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 electrical specs and SOIC-14 package; differs only in tape-and-reel packaging (DR vs DRG4) and RoHS compliance marking | No functional difference; both rated for −25°C to +85°C and 2–30 V supply | Select LM239DR for manual prototyping or small-batch assembly where reel packaging is unnecessary |
| LM339ADR | Higher max supply voltage (36 V), wider temp range (0°C to 70°C), and lower offset (±4 mV typ), but not drop-in compatible due to different pinout (output pins rearranged) | Requires PCB redesign; suited for commercial-grade 36 V systems needing tighter offset, not industrial −25°C operation | Choose LM339ADR only if upgrading supply headroom and offset performance justifies layout change |
Compared with LM239DR, LM239ADRG4 offers identical functionality with enhanced traceability and RoHS compliance documentation; compared with LM339ADR, it trades higher voltage rating and lower offset for guaranteed industrial temperature support and proven pinout compatibility in legacy designs.
Availability
LM239ADRG4 is available at Aetrix Electronics and suitable for server PSU monitoring, vacuum robot safety interlocks, and single-phase UPS battery management requiring stable component supply across extended production lifecycles.
Supply support for LM239ADRG4 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, with over 90 years of innovation in precision analog ICs and industrial-grade components.
The LM239 family was engineered for robust, low-cost voltage comparison in industrial power, motor control, and safety-critical systems - emphasizing reliability, wide supply range, and ease of integration in single-supply architectures.
FAQ
What is the maximum supply voltage rating for LM239ADRG4?
The LM239ADRG4 has an absolute maximum supply voltage of 36 V, but its recommended operating range is 2 V to 30 V. Operating above 30 V may degrade long-term reliability and is not guaranteed per TI's published specifications. The device remains functional at 36 V under short-term stress conditions, but design margins should respect the 30 V upper limit for continuous operation in LM239ADRG4-based systems.
Does LM239ADRG4 support rail-to-rail input common-mode range?
Yes, LM239ADRG4 supports a common-mode input voltage range from ground (V−) up to VCC − 1.5 V at 25°C, and up to VCC − 2.0 V over the full −25°C to +85°C temperature range. This allows direct interfacing with grounded sensors and single-supply signal chains without level-shifting circuitry - a key advantage confirmed in TI's Electrical Characteristics table for LM239/LM239A.
Can LM239ADRG4 outputs drive a 5 V logic input directly?
Yes, LM239ADRG4 outputs are open-collector and require an external pull-up resistor. When pulled up to 5 V, the output sinks current to produce a valid logic LOW (< 400 mV at 4 mA load), while presenting high impedance for logic HIGH - fully compatible with standard TTL and CMOS 5 V inputs. No level-shifter is needed, as confirmed in TI's "Output compatible with TTL, MOS, and CMOS" feature list.
What is the input offset voltage specification for LM239ADRG4 over temperature?
LM239ADRG4 has a maximum input offset voltage of ±9 mV across its full operating temperature range of −25°C to +85°C, as specified in TI's LMx39/LMx39A Electrical Characteristics table. At 25°C, typical offset is ±1 mV, but design-critical applications must budget for the ±9 mV worst-case drift to ensure consistent trip-point behavior in thermal cycling environments.
Is LM239ADRG4 pin-compatible with LM339ADR?
No, LM239ADRG4 is not pin-compatible with LM339ADR. Although both are quad comparators in SOIC-14 packages, their output pin assignments differ: LM239ADRG4 places OUT1 on Pin 1 and OUT2 on Pin 4, whereas LM339ADR assigns OUT1 to Pin 1 and OUT2 to Pin 2. This mismatch requires PCB layout changes - TI explicitly documents this in the Pin Configuration section, confirming LM239ADRG4 and LM339ADR belong to distinct pinout groups.
LM239ADRG4 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
LM239ADRG4 FAQ
1.How can I place an order for LM239ADRG4 through Aetrix?
Please submit a Request for Quotation (RFQ) for LM239ADRG4 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 LM239ADRG4 reliable?
The price and inventory of LM239ADRG4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM239ADRG4 is usually 5 days.
3.What payment methods are accepted for LM239ADRG4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM239ADRG4 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM239ADRG4?
LM239ADRG4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM239ADRG4 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 LM239ADRG4?
For technical support, including LM239ADRG4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM239ADRG4 requirements.
6.How does Aetrix verify that LM239ADRG4 is sourced from the original manufacturer or authorized distributors?
All LM239ADRG4 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 LM239ADRG4 meets industry standards.
7.What is the process for return or replacement of LM239ADRG4?
All LM239ADRG4 units undergo pre-shipment inspection (PSI). If there is an issue with LM239ADRG4, 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 LM239ADRG4 part is unused and in its original packaging.
Return procedure for LM239ADRG4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LM239ADRG4 Tags
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LM2903DR
Texas Instruments
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LM339DR
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LM339PWR
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LM393DT
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LM2901PWR
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LM2903DT
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LM393DR
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LM239DR
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LM339APWR
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LM2903P
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LM393ADR
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NCX2200GMAZ
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