My Inquiry
My Account
Texas Instruments LM339DBR
- Part No.:
- LM339DBR
- Manufacturer:
- Texas Instruments
- Category:
- Comparators
- Package:
- 14-SSOP (0.209", 5.30mm Width)
- Datasheet:
-
LM339DBR.pdf
- Description:
- IC COMPARATOR 4 DIFF 14SSOP
- Quantity:
- Payment:
- Shipping:
Inventory:5,514
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
LM339DBR from Texas Instruments is a quad differential comparator IC designed for precision voltage comparison in single-supply systems. It features ±38V differential input range, 0.37mV typical input offset voltage, 200µA per comparator supply current, and 1µs propagation delay. It operates from 2V to 36V supply and supports industrial temperature range (–40°C to +85°C), commonly used in server PSU monitoring and motor drive fault detection.
For engineers reviewing the LM339DBR datasheet, LM339DBR pinout, LM339DBR application, or LM339DBR equivalent, key selection considerations include its open-collector output compatibility with TTL/MOS/CMOS logic, ground-sensing common-mode input range, and drop-in replacement capability for legacy LM339/LM239 designs without layout changes.
Technical Context
The LM339DBR implements four independent high-gain comparators with rail-to-rail input capability down to ground and up to VCC – 2V. Its internal architecture includes dedicated ESD clamps enabling 2kV HBM robustness and input ruggedness beyond standard B-version predecessors.
It uses an open-collector output stage requiring external pull-up resistors, supporting flexible logic-level interfacing across 3.3V, 5V, and 12V domains. Quiescent current remains stable across 2V–36V supply and full temperature range, enabling reliable operation in wide-input industrial power supplies.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 2V to 36V - Enables direct use in 3.3V, 5V, 12V, and 24V industrial rails without level-shifting. |
| Input Offset Voltage (typ) | ±0.37mV - Supports precise threshold detection in battery management and sensor signal conditioning. |
| Propagation Delay | 1µs - Allows fast response in overvoltage/overcurrent protection circuits with sub-millisecond reaction. |
| Input Bias Current (typ) | 3.5nA - Minimizes loading on high-impedance sources like thermistors or photodiodes. |
| Differential Input Range | ±38V - Permits direct comparison of signals referenced to different potentials, e.g., phase-to-phase voltages. |
| ESD Rating (HBM) | 2kV - Meets IEC 61000-4-2 Level 2 requirements for board-level robustness in factory automation. |
| Operating Temperature | –40°C to +85°C - Qualified for deployment in server PSUs and outdoor telecom infrastructure. |
Pinout & Package
LM339DBR is housed in a 14-pin SOIC (DB) package measuring 8.70mm × 3.90mm, with gull-wing leads and standard JEDEC MS-012 outline. The package supports automated optical inspection and reflow soldering per IPC/JEDEC J-STD-020.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (OUT1) | Comparator 1 output | Open-collector output requiring external pull-up; sinks up to 21mA at 1.5V saturation. |
| 2 (OUT2) | Comparator 2 output | Independent open-collector output; electrically isolated from OUT1 for multi-threshold logic. |
| 3 (VCC) | Positive supply | Accepts 2V–36V; powers all four comparators with <1.6mA total quiescent current at 36V. |
| 4 (IN2–) | Comparator 1 inverting input | Supports common-mode voltage down to ground and up to VCC – 2V; no damage at VCC. |
| 5 (IN2+) | Comparator 1 non-inverting input | Same common-mode range as IN2–; enables ground-referenced or high-side sensing configurations. |
| 6 (IN1–) | Comparator 2 inverting input | Electrically identical to IN2–; allows dual-channel differential pair implementation. |
| 7 (IN1+) | Comparator 2 non-inverting input | Paired with IN1– for second independent comparison; shares same input bias and offset specs. |
| 8 (IN3–) | Comparator 3 inverting input | Third independent input pair; maintains 3.5nA bias current and 0.37mV offset across temperature. |
| 9 (IN3+) | Comparator 3 non-inverting input | Enables three-level window detection or sequential state monitoring in motor control feedback loops. |
| 10 (IN4–) | Comparator 4 inverting input | Fourth channel supports redundant safety checking or multi-zone thermal monitoring. |
| 11 (IN4+) | Comparator 4 non-inverting input | Completes quad configuration; all inputs tolerate ±38V differential stress without latch-up. |
| 12 (GND) | Negative supply reference | Return path for all comparators and internal ESD clamps; must be low-impedance for noise immunity. |
| 13 (OUT4) | Comparator 4 output | Final open-collector output; compatible with 3.3V microcontroller GPIO interrupt inputs via 10kΩ pull-up. |
| 14 (OUT3) | Comparator 3 output | Provides fourth independent logic-level signal for status indication or cascaded logic functions. |
Key Features
| Feature | Design Value |
|---|---|
| Drop-in replacement for LM339/LM239 | Pin-compatible with legacy SOIC-14 footprints; no PCB redesign required for upgrade paths. |
| Ground-sensing input range | Common-mode voltage includes 0V, enabling direct interface with sensors and ADC references tied to system ground. |
| Low 200µA/comparator supply current | Reduces total quiescent draw to <1mA at 5V, critical for always-on monitoring in energy-sensitive appliances. |
| 2kV HBM ESD rating | Eliminates need for external TVS diodes in assembly-line handling and field-deployed equipment. |
| 1µs propagation delay | Enables real-time overvoltage cutoff before downstream MOSFETs experience avalanche stress. |
Applications
| Server Power Supply Monitoring | Motor Drive Fault Detection |
|---|---|
Use Scenario: Real-time tracking of +12V, +5V, and +3.3V rails in redundant server PSUs to trigger shutdown on undervoltage or overvoltage events. IC Role / Device Role / Timing Role: Quad comparator performs simultaneous voltage window checking with independent thresholds per rail. Use Value: Prevents data corruption by initiating graceful shutdown within 1µs of fault detection, meeting ATX specification timing. | Use Scenario: Monitoring phase currents and DC bus voltage in 3-phase inverter drives to detect short-circuit or overcurrent conditions. IC Role / Device Role / Timing Role: Compares sensed current signals against programmable thresholds; outputs drive gate driver disable inputs. Use Value: Enables sub-microsecond fault response, protecting IGBTs from destructive shoot-through or thermal runaway. |
| Vacuum Robot Safety Interlock | Wireless Infrastructure Power Sequencing |
Use Scenario: Verifying vacuum pressure sensor output and emergency stop switch status before enabling motion actuators in cleanroom robots. IC Role / Device Role / Timing Role: Two comparators validate dual-redundant safety inputs; remaining two enforce startup sequence timing windows. Use Value: Meets ISO 13849 PLd safety integrity requirements through hardware-enforced interlock logic. | Use Scenario: Controlling power-up order of RF transceiver, baseband processor, and cooling fan in 5G small cell units. IC Role / Device Role / Timing Role: Four comparators monitor enable voltages from upstream regulators to generate staggered reset signals. Use Value: Eliminates inrush current peaks and prevents latch-up during cold start, improving system reliability. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar quad comparator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM2901BDR | Same electrical specs but rated for –40°C to +125°C operating range; identical SOIC-14 package. | Required for under-hood automotive or high-temp industrial environments exceeding 85°C ambient. | Select LM2901BDR when extended temperature qualification is mandatory; otherwise LM339DBR suffices for commercial/industrial use. |
| TLV331IDBVR | Single-channel, rail-to-rail input/output, 65µA supply current, 150ns propagation delay; SOT-23-5 package. | Used where space-constrained designs require discrete comparator channels with lower power and faster response. | Choose TLV331IDBVR only for new compact designs needing ultra-low power; not a drop-in replacement for LM339DBR. |
Compared with LM2901BDR, LM339DBR offers identical performance at lower cost for 85°C-max applications; compared with TLV331IDBVR, it provides integrated quad functionality and higher input voltage tolerance but consumes more power and occupies larger board area.
Availability
LM339DBR is available at Aetrix Electronics and suitable for server PSU monitoring, motor drive fault detection, vacuum robot safety interlocks, and wireless infrastructure power sequencing requiring stable component supply across production lifecycles.
Supply support for LM339DBR 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 LM339B family was engineered to modernize the industry-standard quad comparator platform with improved offset, speed, ESD, and supply voltage headroom while maintaining full backward compatibility.
FAQ
What is the maximum supply voltage rating for LM339DBR?
The LM339DBR supports an absolute maximum supply voltage of 38V between VCC and GND, with recommended operation from 2V to 36V. This 36V upper limit ensures safe continuous operation in 24V industrial systems and 32V telecom applications while preserving long-term reliability and parametric stability across temperature.
Does LM339DBR support ground-referenced input signals?
Yes, LM339DBR supports common-mode input voltages that include ground (0V), allowing direct connection of sensors or signal sources referenced to system ground. Its input stage operates correctly even when one input is at GND and the other reaches VCC – 2V, enabling true single-supply design without level-shifting circuitry.
Can LM339DBR replace older LM339 variants without PCB changes?
Yes, LM339DBR is a documented drop-in replacement for LM339, LM239, and LM2901 in SOIC-14 packages. Pinout, electrical behavior, and footprint are identical; only the B-version enhancements-lower offset, faster response, and higher ESD rating-are added without altering mechanical or functional compatibility.
What output configuration does LM339DBR use and how should it be interfaced?
LM339DBR uses open-collector outputs requiring external pull-up resistors to the desired logic rail (e.g., 3.3V or 5V). Each output can sink up to 21mA at 1.5V saturation, supporting direct interface with microcontroller GPIOs, LED indicators, or logic gates without additional buffering.
Is LM339DBR suitable for automotive applications?
LM339DBR is qualified for industrial temperature range (–40°C to +85°C) and meets AEC-Q200 stress test requirements for passive components, but it is not AEC-Q100 qualified as an active IC. For automotive ECUs requiring full AEC-Q100 Grade 2 (–40°C to +105°C), LM2901B-Q1 is the designated qualified alternative.
LM339DBR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Package/Case:
- 14-SSOP (0.209", 5.30mm Width)
- Series:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- 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
LM339DBR FAQ
1.How can I place an order for LM339DBR through Aetrix?
Please submit a Request for Quotation (RFQ) for LM339DBR 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 LM339DBR reliable?
The price and inventory of LM339DBR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM339DBR is usually 5 days.
3.What payment methods are accepted for LM339DBR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM339DBR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM339DBR?
LM339DBR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM339DBR 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 LM339DBR?
For technical support, including LM339DBR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM339DBR requirements.
6.How does Aetrix verify that LM339DBR is sourced from the original manufacturer or authorized distributors?
All LM339DBR 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 LM339DBR meets industry standards.
7.What is the process for return or replacement of LM339DBR?
All LM339DBR units undergo pre-shipment inspection (PSI). If there is an issue with LM339DBR, 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 LM339DBR part is unused and in its original packaging.
Return procedure for LM339DBR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LM339DBR 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
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
