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Texas Instruments LM339DBRE4
- Part No.:
- LM339DBRE4
- Manufacturer:
- Texas Instruments
- Category:
- Comparators
- Package:
- 14-SSOP (0.209", 5.30mm Width)
- Datasheet:
-
LM339DBRE4.pdf
- Description:
- IC COMPARATOR 4 DIFF 14SSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,910
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Product details
Overview
LM339DBRE4 from Texas Instruments is a quad differential comparator IC designed for precision voltage comparison in single-supply systems. It features ±0.37 mV typical input offset voltage, 1 µs propagation delay, 2–36 V supply range, 2 kV HBM ESD rating, and rail-to-rail common-mode input range including ground - enabling use in motor drive overvoltage detection and server PSU fault monitoring.
For engineers reviewing the LM339DBRE4 datasheet, LM339DBRE4 pinout, LM339DBRE4 application, or LM339DBRE4 equivalent, this page delivers verified specifications, SOIC-14 package details, real-world application context, and validated alternative options for industrial power control, automation sensing, and embedded threshold-detection designs.
Technical Context
The LM339DBRE4 implements four independent open-collector comparators with internal ESD clamps, supporting operation from 2 V to 36 V with quiescent current independent of supply voltage. Its input stage allows one input to reach up to VCC while the other remains within (V–) to (V+) – 2 V, enabling robust high-side sensing.
Each comparator delivers TTL/MOS/CMOS-compatible output sinking up to 21 mA, with low 110–400 mV saturation voltage at 4 mA load and ±5.5 mV max offset over temperature (–40°C to +85°C), meeting requirements for precision window comparators and analog-to-digital interface circuits.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 2 V to 36 V - supports wide-input industrial supplies without external regulation |
| Input Offset Voltage (max) | ±5.5 mV over –40°C to +85°C - enables accurate 10 mV-level threshold detection |
| Propagation Delay | 1 µs (typ) at 5 V - suitable for <1 MHz window-comparator timing loops |
| Input Bias Current (max) | 25 nA over temperature - minimizes error in high-impedance sensor interfaces |
| Output Sink Current | 21 mA per channel - drives LEDs, relays, or logic inputs directly without buffer |
| ESD Rating (HBM) | 2000 V - meets IEC 61000-4-2 Level 2 for board-level robustness |
| Common-Mode Input Range | Includes ground and extends to VCC – 2 V - allows direct connection to grounded sensors |
Pinout & Package
LM339DBRE4 is packaged in a 14-pin SOIC (D package) with nominal body size 8.70 mm × 3.90 mm and standard JEDEC MS-012AC footprint.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | OUT2 | Open-collector output of comparator 2 - requires external pull-up for logic-high assertion |
| 2 | OUT1 | Open-collector output of comparator 1 - shares same sink capability and voltage limits as OUT2 |
| 3 | VCC | Positive supply pin - accepts 2–36 V DC; decoupling capacitor recommended near pin |
| 4 | IN2– | Inverting input of comparator 1 - referenced to internal differential pair; accepts voltages down to –0.3 V |
| 5 | IN2+ | Non-inverting input of comparator 1 - supports common-mode range up to VCC – 2 V |
| 6 | IN1– | Inverting input of comparator 2 - electrically identical to IN2–; channel naming follows TI convention |
| 7 | IN1+ | Non-inverting input of comparator 2 - matches IN2+ electrical behavior and voltage limits |
| 8 | IN3– | Inverting input of comparator 3 - fully independent; no crosstalk with channels 1 or 2 |
| 9 | IN3+ | Non-inverting input of comparator 3 - supports same input voltage range and bias current specs |
| 10 | IN4– | Inverting input of comparator 4 - usable across full supply range with no phase reversal |
| 11 | IN4+ | Non-inverting input of comparator 4 - enables simultaneous four-threshold monitoring |
| 12 | GND | Negative supply/reference - all inputs and outputs referenced to this node; must be low-impedance |
| 13 | OUT4 | Open-collector output of comparator 4 - sinks up to 21 mA; compatible with 3.3 V or 5 V logic |
| 14 | OUT3 | Open-collector output of comparator 3 - functionally identical to OUT1 and OUT2 |
Key Features
| Feature | Design Value |
|---|---|
| Drop-in B-version upgrade | Replaces LM339/LM239/LM2901 without PCB changes - same SOIC-14 pinout and footprint |
| Extended supply voltage | Rated to 36 V (absolute max 38 V) - eliminates need for external regulators in 24 V industrial rails |
| Low input offset drift | ±0.37 mV typical at 25°C, ±5.5 mV max over –40°C to +85°C - ensures stable trip points across thermal cycles |
| Fast response time | 1 µs propagation delay - supports real-time overcurrent and undervoltage protection in motor drives |
| Robust input structure | Differential input voltage range ±38 V - withstands transient surges beyond supply rails without latch-up |
| Ground-sensing capability | Common-mode range includes 0 V - enables direct interface with current-shunt amplifiers and thermistor dividers |
Applications
| Motor Drive Protection | Server PSU Monitoring |
|---|---|
|
Use Scenario: Detect overvoltage, overcurrent, and thermal faults in 3-phase inverter gate drivers and DC-link stages. IC Role / Device Role / Timing Role: Quad comparator monitors voltage thresholds on DC bus, phase currents, and heatsink thermistors with independent outputs. Use Value: Enables sub-µs fault response using fast 1 µs propagation delay and rail-to-rail input range, reducing IGBT short-circuit risk. |
Use Scenario: Monitor +12 V, +5 V, +3.3 V, and standby rails in redundant server power supplies for brownout and overvoltage shutdown. IC Role / Device Role / Timing Role: Four comparators provide independent voltage windows per rail, driving OR-tied fault latches. Use Value: ±5.5 mV max offset ensures accurate 1% tolerance detection across temperature, improving PSU reliability. |
| Factory Automation Sensors | Wireless Infrastructure Power Control |
|
Use Scenario: Interface 4–20 mA loop receivers, RTD bridges, and proximity sensors in PLC I/O modules. IC Role / Device Role / Timing Role: Compares conditioned analog signals against programmable reference voltages to generate digital status flags. Use Value: 25 nA max input bias current prevents loading of high-Z sensor outputs, preserving measurement accuracy. |
Use Scenario: Manage power sequencing and fault isolation in remote radio units (RRUs) and baseband units (BBUs). IC Role / Device Role / Timing Role: Monitors DC-DC converter outputs, battery backup status, and cooling fan tach signals. Use Value: 2 kV HBM ESD rating ensures survivability during field maintenance and hot-swap operations in telecom cabinets. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar quad differential comparator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM339DR | Legacy A-version; ±4 mV max offset, 1.3 µs response, 30 V max supply, –40°C to +85°C range | Limited to lower-voltage systems; less precise thresholding in wide-temp environments | Select when cost sensitivity outweighs performance needs and legacy design reuse is required |
| LM2901BDR | Same B-version spec as LM339DBRE4 but rated for –40°C to +125°C operating range | Better suited for under-hood automotive or high-temp industrial enclosures | Choose for extended temperature applications where LM339DBRE4's 85°C upper limit is insufficient |
Compared with LM339DR, LM339DBRE4 offers tighter offset, faster response, and higher supply rating; compared with LM2901BDR, it trades 125°C operation for lower cost and identical performance below 85°C - making it optimal for commercial-grade power management.
Availability
LM339DBRE4 is available at Aetrix Electronics and suitable for server PSU monitoring, motor drive protection, factory automation sensor interfaces, and wireless infrastructure power control requiring stable component supply and long-term industrial availability.
Supply support for LM339DBRE4 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 LM339B family - including LM339DBRE4 - was engineered to replace legacy quad comparators with improved offset, speed, ESD resilience, and supply voltage headroom for next-generation industrial power and sensing systems.
FAQ
What is the maximum supply voltage for LM339DBRE4?
The LM339DBRE4 has an absolute maximum supply voltage of 38 V, with recommended operation from 2 V to 36 V. This allows direct use with 24 V industrial rails and 36 V battery systems without external regulation, while maintaining specified performance across the full range.
Does LM339DBRE4 support ground-referenced inputs?
Yes, LM339DBRE4 supports common-mode input voltages that include ground (0 V), with a range extending from V– to V+ – 2 V. This enables direct interfacing with grounded sensors, shunt resistors, and thermistor networks without level-shifting circuitry.
What is the output configuration of LM339DBRE4?
LM339DBRE4 features four independent open-collector outputs. Each output requires an external pull-up resistor to a logic-compatible voltage (e.g., 3.3 V or 5 V) and can sink up to 21 mA, allowing direct drive of LEDs, MOSFET gates, or logic inputs.
Is LM339DBRE4 pin-compatible with older LM339 variants?
Yes, LM339DBRE4 uses the standard 14-pin SOIC (D) package and is a drop-in replacement for LM339, LM239, and LM2901 in SOIC-14 format. Pin functions, spacing, and thermal characteristics match legacy versions, enabling seamless design upgrades.
What is the input offset voltage specification for LM339DBRE4 over temperature?
LM339DBRE4 has a maximum input offset voltage of ±5.5 mV over the full operating temperature range of –40°C to +85°C, with a typical value of ±0.37 mV at 25°C. This tight offset enables reliable detection of small differential signals in precision threshold applications.
LM339DBRE4 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Package/Case:
- 14-SSOP (0.209", 5.30mm Width)
- Series:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Discontinued at Digi-Key
- 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-SSOP
LM339DBRE4 FAQ
1.How can I place an order for LM339DBRE4 through Aetrix?
Please submit a Request for Quotation (RFQ) for LM339DBRE4 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 LM339DBRE4 reliable?
The price and inventory of LM339DBRE4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM339DBRE4 is usually 5 days.
3.What payment methods are accepted for LM339DBRE4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM339DBRE4 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM339DBRE4?
LM339DBRE4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM339DBRE4 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 LM339DBRE4?
For technical support, including LM339DBRE4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM339DBRE4 requirements.
6.How does Aetrix verify that LM339DBRE4 is sourced from the original manufacturer or authorized distributors?
All LM339DBRE4 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 LM339DBRE4 meets industry standards.
7.What is the process for return or replacement of LM339DBRE4?
All LM339DBRE4 units undergo pre-shipment inspection (PSI). If there is an issue with LM339DBRE4, 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 LM339DBRE4 part is unused and in its original packaging.
Return procedure for LM339DBRE4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LM339DBRE4 Tags
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LM2903DR
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LM339DR
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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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LM2903P
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