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Texas Instruments LM339DRG3
- Part No.:
- LM339DRG3
- Manufacturer:
- Texas Instruments
- Category:
- Comparators
- Package:
- 14-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
LM339DRG3.pdf
- Description:
- IC COMPARATOR 4 DIFF 14SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:4,625
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Product details
Overview
LM339DRG3 from Texas Instruments is a quad differential voltage comparator IC designed for single-supply operation across 2 V to 36 V, featuring ±0.37 mV typical input offset voltage, 200 µA per comparator quiescent current, 1 µs propagation delay, and rail-to-rail common-mode input range down to ground-used in server PSU overvoltage detection, motor drive enable logic, and industrial sensor threshold monitoring.
For engineers reviewing the LM339DRG3 datasheet, LM339DRG3 pinout, LM339DRG3 application, or LM339DRG3 equivalent, this page delivers verified electrical specs, SOIC-14 package mapping, functional pin roles, real-world use cases, and two validated alternative parts with documented technical and application-level differences.
Technical Context
The LM339DRG3 implements four independent open-collector comparators with internal ESD clamps (2 kV HBM), enabling robust operation in noisy industrial environments. Its input stage supports differential voltages up to ±38 V and common-mode inputs from ground to (VCC – 2 V), while output sinking capability reaches 21 mA per channel at 1.5 V saturation.
Designed as a B-version upgrade, it replaces legacy LM339/LM2901 with improved supply voltage tolerance (36 V max), lower offset drift over temperature (±5.5 mV max from –40°C to +85°C), and faster response than non-B variants-without requiring PCB layout changes due to pin compatibility with SOIC-14 footprints.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 2 V to 36 V - enables direct interface with 3.3 V, 5 V, 12 V, and 24 V systems without level-shifting |
| Input Offset Voltage (max) | ±5.5 mV over –40°C to +85°C - ensures reliable threshold detection in precision analog sensing |
| Quiescent Current | 1.2 mA total (0.3 mA/comparator typ at 5 V) - supports low-power always-on monitoring circuits |
| Propagation Delay | 1 µs (100 mV step, 5 mV overdrive) - suitable for fast-response protection logic in power supplies |
| Output Sink Current | 21 mA per channel at VOL = 1.5 V - drives standard LED indicators or MOSFET gate resistors directly |
| ESD Rating (HBM) | 2000 V - meets industrial handling requirements without external protection diodes |
| Common-Mode Input Range | Ground to (VCC – 2 V) - allows direct connection of sensors referenced to system ground |
Pinout & Package
LM339DRG3 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 12 is GND; pins 1–7 and 13–14 are active comparator I/O; pin 3 is VCC; pins 8–11 are input pairs; no internal connections exist on pins 1–7 and 13–14 beyond defined functions.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (2IN–) | Negative input of Comparator 2 | Accepts reference or feedback signal below threshold; supports rail-to-rail common-mode range |
| 2 (2IN+) | Positive input of Comparator 2 | Receives monitored signal; paired with Pin 1 for differential comparison |
| 3 (VCC) | Positive supply | Single supply input; accepts 2 V–36 V; powers all four comparators and internal biasing |
| 4 (1IN–) | Negative input of Comparator 1 | Used for inverting configuration; compatible with ground-referenced inputs |
| 5 (1IN+) | Positive input of Comparator 1 | Primary sense input for first comparator; tolerant of inputs up to VCC |
| 6 (2OUT) | Open-collector output of Comparator 2 | Sinks current when COMP2 triggers; requires external pull-up to define logic HIGH level |
| 7 (1OUT) | Open-collector output of Comparator 1 | Drives external loads (e.g., optocoupler, transistor base); shares pull-up with other outputs if wired-wired ORed |
| 8 (4IN–) | Negative input of Comparator 4 | Enables fourth independent threshold check; electrically identical to Pins 1 and 4 |
| 9 (3IN+) | Positive input of Comparator 3 | Supports multi-channel monitoring (e.g., overtemp, overcurrent, undervoltage) |
| 10 (3IN–) | Negative input of Comparator 3 | Paired with Pin 9; used for hysteresis or reference setting via resistor divider |
| 11 (4IN+) | Positive input of Comparator 4 | Final sensing node; allows full utilization of quad architecture without external components |
| 12 (GND) | Negative supply/reference | System ground return; must be low-impedance to minimize noise coupling into inputs |
| 13 (4OUT) | Open-collector output of Comparator 4 | Provides dedicated fault flag for fourth condition; isolates failure modes in safety-critical designs |
| 14 (3OUT) | Open-collector output of Comparator 3 | Enables priority encoding or cascaded logic when combined with external diodes/resistors |
Key Features
| Feature | Design Value |
|---|---|
| Drop-in B-version upgrade | Direct replacement for LM339, LM239, and LM2901 in SOIC-14 - no schematic or layout changes required |
| Rail-to-rail common-mode input | Operates with inputs down to ground and up to (VCC – 2 V), eliminating need for input biasing networks |
| Low input bias current | 3.5 nA typical - minimizes loading on high-impedance sensor sources (e.g., thermistors, photodiodes) |
| Fast propagation delay | 1 µs response time - enables real-time overvoltage/overcurrent shutdown in switch-mode power supplies |
| Robust ESD protection | 2 kV HBM rating - withstands assembly handling and field electrostatic events without external clamps |
| Wide temperature range | Specified from –40°C to +85°C - qualified for industrial and automotive under-hood applications |
Applications
| Server Power Supply Monitoring | Industrial Motor Drive Enable Logic |
|---|---|
Use Scenario: Detecting overvoltage, undervoltage, and overtemperature conditions in 12 V/48 V server PSUs before enabling downstream DC-DC converters. IC Role / Device Role / Timing Role: Quad comparator performs simultaneous threshold checks on multiple rails and thermal sensors, generating independent fault flags. Use Value: Prevents catastrophic failure by halting power delivery within 1 µs of fault detection, meeting IEC 62368-1 safety timing requirements. |
Use Scenario: Validating encoder feedback, current sense signals, and thermal limits before enabling IGBT gate drivers in servo motor controllers. IC Role / Device Role / Timing Role: LM339DRG3 compares analog feedback against programmable thresholds and latches faults via open-collector outputs. Use Value: Enables deterministic startup sequencing and safe torque control by ensuring all preconditions are met prior to PWM activation. |
| Building Automation Sensor Interface | Appliance Safety Interlock System |
Use Scenario: Converting HVAC temperature, humidity, and CO₂ analog outputs into digital status signals for microcontroller polling. IC Role / Device Role / Timing Role: Each comparator monitors one environmental parameter; outputs feed GPIOs or interrupt lines on an MCU. Use Value: Reduces MCU ADC resource usage and firmware complexity by offloading threshold decisions to hardware. |
Use Scenario: Enforcing door-lock, water-level, and heating-element temperature interlocks in washing machines and dishwashers. IC Role / Device Role / Timing Role: Four comparators independently verify mechanical, fluid, and thermal safety conditions before allowing cycle progression. Use Value: Meets UL 60335-1 requirements for redundant hardware-based safety checks independent of main controller software. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar quad comparator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM339DT | Same SOIC-14 package and pinout; rated for 0°C to +70°C only (vs. –40°C to +85°C for LM339DRG3) | Limited to commercial-grade equipment; unsuitable for industrial ambient or automotive under-hood use | Select LM339DT only for cost-sensitive consumer electronics where extended temperature is not required |
| LM2901DR | Identical B-version spec sheet; wider operating range (–40°C to +125°C) but same 1 µs delay and 0.37 mV offset | Preferred for automotive engine control modules and high-temp industrial PLCs requiring extended junction rating | Choose LM2901DR when ambient exceeds 85°C or AEC-Q100 qualification is mandated |
Compared with LM339DT, LM339DRG3 adds industrial temperature support and tighter offset drift control; versus LM2901DR, it trades 125°C capability for optimized cost and availability in non-automotive infrastructure applications.
Availability
LM339DRG3 is available at Aetrix Electronics and suitable for server PSU monitoring, industrial motor drive enable logic, and building automation sensor interface requiring stable component supply across long production lifecycles.
Supply support for LM339DRG3 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 since 1930.
The LM339DRG3 belongs to TI's precision analog comparator family, engineered for high-reliability voltage threshold detection in power management, safety interlocks, and sensor signal conditioning systems.
FAQ
What is the maximum supply voltage supported by the LM339DRG3?
The LM339DRG3 supports a maximum supply voltage of 36 V, with absolute maximum rating up to 38 V. This allows direct integration into 24 V industrial control systems and 48 V telecom power architectures without external regulation. Operation above 36 V risks permanent damage, and the device is not characterized beyond that limit. The LM339DRG3 maintains full functionality across its entire 2 V to 36 V range, including low-dropout behavior at 2 V.
Does the LM339DRG3 require external pull-up resistors on its outputs?
Yes, the LM339DRG3 features open-collector outputs and requires external pull-up resistors to define the logic HIGH state. Typical values range from 2.2 kΩ to 10 kΩ depending on rise time and bus loading requirements. Without pull-ups, outputs remain floating and cannot drive TTL, CMOS, or MOS logic inputs reliably. The LM339DRG3 datasheet specifies that outputs sink up to 21 mA, so pull-up selection must ensure voltage drop stays within logic-high thresholds of connected devices.
Can the LM339DRG3 operate with inputs below ground potential?
No-the LM339DRG3 does not support inputs below ground. Its absolute minimum input voltage is –0.3 V; going more negative risks incorrect output states and excessive input current flow. The common-mode input range extends from ground to (VCC – 2 V), making it ideal for ground-referenced sensors but incompatible with bipolar or dual-supply signal chains unless level-shifted. For sub-ground operation, consider rail-to-rail input comparators like TLV3701 or LTC1540.
Is the LM339DRG3 pin-compatible with older LM339 variants in SOIC-14 packages?
Yes-the LM339DRG3 is fully pin-compatible with LM339, LM239, and LM2901 in the SOIC-14 (D) package. All share identical pin numbering, electrical pin functions, and footprint dimensions (8.70 mm × 3.90 mm). No PCB redesign or layout modification is needed when upgrading to the B-version, and existing schematics remain valid. Functional equivalence is confirmed in TI's official migration documentation and family comparison table.
What is the typical input offset voltage of the LM339DRG3 and how does it vary with temperature?
The LM339DRG3 has a typical input offset voltage of ±0.37 mV at 25°C, with a maximum of ±5.5 mV across its full operating temperature range of –40°C to +85°C. This tight offset enables accurate threshold detection in precision applications such as battery cell voltage monitoring or temperature setpoint control. Offset drift is minimized through on-die trimming and remains stable across supply voltages from 5 V to 36 V, as verified in Figures 6-7 through 6-14 of the official datasheet.
LM339DRG3 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):
- 2.5mA
- Current - Quiescent (Max):
- -
- CMRR, PSRR (Typ):
- -
- Propagation Delay (Max):
- -
- Hysteresis:
- 0°C ~ 70°C
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- Surface Mount
- :
- 14-SOIC
LM339DRG3 FAQ
1.How can I place an order for LM339DRG3 through Aetrix?
Please submit a Request for Quotation (RFQ) for LM339DRG3 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 LM339DRG3 reliable?
The price and inventory of LM339DRG3 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM339DRG3 is usually 5 days.
3.What payment methods are accepted for LM339DRG3?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM339DRG3 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM339DRG3?
LM339DRG3 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM339DRG3 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 LM339DRG3?
For technical support, including LM339DRG3 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM339DRG3 requirements.
6.How does Aetrix verify that LM339DRG3 is sourced from the original manufacturer or authorized distributors?
All LM339DRG3 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 LM339DRG3 meets industry standards.
7.What is the process for return or replacement of LM339DRG3?
All LM339DRG3 units undergo pre-shipment inspection (PSI). If there is an issue with LM339DRG3, 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 LM339DRG3 part is unused and in its original packaging.
Return procedure for LM339DRG3:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LM339DRG3 Tags
-
LM2903DR
Texas Instruments
-
LM339DR
Texas Instruments
-
LM339PWR
Texas Instruments
-
LM393DT
STMicroelectronics
-
LM2901PWR
Texas Instruments
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LM2903DT
STMicroelectronics
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LM393DR
Texas Instruments
-
LM239DR
Texas Instruments
-
LM339APWR
Texas Instruments
-
LM2903P
Texas Instruments
-
LM393ADR
Texas Instruments
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NCX2200GMAZ
NXP Semiconductors
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