My Inquiry
My Account
Texas Instruments LM339MX
- Part No.:
- LM339MX
- Manufacturer:
- Texas Instruments
- Category:
- Comparators
- Package:
- 14-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
LM339MX.pdf
- Description:
- IC COMPARATOR 4 GEN PUR 14SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:4,574
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
LM339MX from Texas Instruments is a quad open-collector voltage comparator IC designed for industrial and embedded signal conditioning. It features ±3 mV maximum input offset voltage, 0.8 mA supply current per comparator (independent of supply voltage), and operates from 2 V to 36 V single supply or ±1 V to ±18 V dual supply. Its input common-mode range includes ground, enabling direct sensing of low-side signals in battery-powered and automotive subsystems.
For engineers reviewing the LM339MX datasheet, LM339MX pinout, LM339MX application, or LM339MX equivalent, key selection considerations include its rail-to-rail input capability down to GND, TTL/CMOS-compatible open-collector outputs, low quiescent current for portable systems, and wide temperature range (0°C to 70°C) suitable for consumer and industrial control interfaces.
Technical Context
The LM339MX implements four independent high-gain comparators with PNP differential input stages, enabling input voltages down to −0.3 V relative to GND without damage. Its uncommitted NPN output transistors support wired-OR logic and level-shifting up to 36 V via external pull-up resistors.
Each comparator exhibits low input bias current (25 nA typical), low input offset current (±5 nA), and output saturation voltage of 250 mV at 4 mA sink current - critical for minimizing voltage drop in digital interface and analog threshold detection circuits.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 2–36 VDC single supply or ±1–±18 VDC dual supply - supports wide-input industrial power rails and battery-backed systems. |
| Input Offset Voltage | ±3 mV max - enables accurate threshold detection within 3 mV tolerance across all four channels at room temperature. |
| Supply Current | 0.8 mA total (all four comparators) - independent of supply voltage, ideal for low-power sensor monitoring and always-on circuits. |
| Input Bias Current | 25 nA typical - minimizes loading on high-impedance reference sources and sensor bridges. |
| Output Saturation Voltage | 250 mV at 4 mA sink - ensures reliable LOW-level logic assertion when driving TTL, CMOS, or discrete MOSFET gates. |
| Input Common-Mode Range | Includes GND (0 V) - allows direct comparison of signals referenced to system ground without level-shifting circuitry. |
| Differential Input Voltage | Up to 36 V - permits inputs exceeding V+ (e.g., 30 V input with 5 V supply), simplifying overvoltage-tolerant front-end design. |
Pinout & Package
LM339MX is supplied in a 14-pin SOIC package (8.65 mm × 3.91 mm body size), optimized for surface-mount assembly and thermal performance in compact PCB layouts.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2, 13, 14 | Output (Ch2, Ch1, Ch4, Ch3) | Open-collector NPN outputs - require external pull-up resistors; support wired-OR logic and level translation up to 36 V. |
| 3 | V+ | Positive supply pin - accepts 2–36 VDC or connects to +V in dual-supply mode; powers all four comparators. |
| 12 | GND | Ground reference - serves as return path for supply and defines input common-mode baseline including 0 V. |
| 4, 5, 6, 7, 8, 9, 10, 11 | Inverting/Non-inverting Inputs (Ch1–Ch4) | Differential input pairs - each channel has dedicated ±IN pins; inputs tolerate −0.3 V below GND and up to V+ + 36 V. |
Key Features
| Feature | Design Value |
|---|---|
| Single-supply operation with GND-referenced inputs | Enables direct interfacing with sensors, potentiometers, and microcontroller ADC references without level shifters. |
| Low 0.8 mA total supply current | Reduces system power budget in battery-operated devices such as smoke detectors and portable instrumentation. |
| Open-collector outputs compatible with TTL/DTL/ECL/MOS/CMOS | Allows flexible logic interfacing and multi-comparator OR'ing without additional gate logic. |
| Input offset voltage ≤ ±3 mV | Supports precise window detection and analog-to-digital conversion with <10 mV total error margin. |
| Wide 2–36 V supply range | Eliminates need for separate voltage regulators in mixed-voltage systems (e.g., 3.3 V MCU + 24 V actuator control). |
Applications
| Overvoltage Protection Circuit | Temperature Threshold Monitor |
|---|---|
|
Use Scenario: Detects when a 12 V DC bus exceeds 13.8 V to trigger shutdown of downstream converters. IC Role / Device Role / Timing Role: Quad comparator configured as window detector using two channels for upper/lower thresholds; third channel drives latch, fourth reserved. Use Value: Leverages rail-to-rail input range and 250 mV output saturation to assert clean reset signal to a microcontroller GPIO without external buffering. |
Use Scenario: Monitors thermistor voltage divider output to activate cooling fan above 65°C in an industrial PLC enclosure. IC Role / Device Role / Timing Role: Single comparator channel compares thermistor-derived voltage against precision reference; open-collector output directly switches 12 V fan via pull-up resistor. Use Value: Uses 25 nA input bias current to avoid thermistor self-heating errors and 0.8 mA supply current to minimize thermal drift in sealed enclosure. |
| Zero-Crossing Detector (AC Mains) | Simple Analog-to-Digital Converter |
|
Use Scenario: Generates synchronized logic pulses for TRIAC firing in 230 V AC dimmer modules. IC Role / Device Role / Timing Role: One comparator channel compares rectified AC waveform against 0 V reference; GND-inclusive input enables direct connection to center-tapped transformer secondary. Use Value: Achieves sub-microsecond response time (300 ns typical) and eliminates need for negative supply by operating from single 5 V rail. |
Use Scenario: Implements 2-bit flash ADC for panel meter display using resistor ladder and three comparators. IC Role / Device Role / Timing Role: Three LM339MX channels compare input voltage against three fixed thresholds (1.25 V, 2.5 V, 3.75 V); fourth channel unused or reserved for error flag. Use Value: ±3 mV offset voltage ensures monotonic code transitions and prevents missing codes in low-resolution digitization. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar quad comparator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM339DR | Same electrical specs and pinout; SOIC-14 package with moisture sensitivity level (MSL) 1 vs. LM339MX's MSL 3. | Preferred for high-volume automated assembly where extended floor life before reflow is required. | Select LM339DR for production lines requiring >168-hour dry pack exposure tolerance; LM339MX suits prototyping and medium-batch builds. |
| TLV3704IPW | Rail-to-rail input/output, 1 µA supply current, but only 5.5 V max supply and −40°C to 125°C temp range. | Better for ultra-low-power, low-voltage IoT sensors; unsuitable for 24 V industrial rails or legacy 36 V designs. | Choose TLV3704IPW only when supply is ≤5.5 V and sub-µA quiescent current is mandatory; LM339MX remains optimal for wide-VDD robustness. |
Compared with LM339DR and TLV3704IPW, the LM339MX delivers superior supply voltage flexibility (2–36 V), proven industrial reliability, and identical functional behavior to industry-standard LM339 - making it the preferred choice for legacy-compatible, high-voltage, and cost-sensitive applications.
Availability
LM339MX is available at Aetrix Electronics and suitable for overvoltage protection circuits, temperature threshold monitors, zero-crossing detectors, and simple analog-to-digital converters requiring stable component supply across industrial, automotive, and consumer electronics programs.
Supply support for LM339MX 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 broad industrial portfolio support.
The LM339MX belongs to TI's legacy LMx39-N series of low-power, low-offset quad comparators - engineered for robust, single-supply operation in industrial control, power management, and sensor interface applications where reliability and wide voltage range are critical.
FAQ
What is the operating temperature range for the LM339MX?
The LM339MX is rated for operation from 0°C to 70°C ambient temperature. This commercial-grade range aligns with standard industrial control and consumer electronics environments. For extended temperature operation (−40°C to 85°C), consider the LM2901-N variant; for military-grade (−55°C to 125°C), the LM139-N is specified. The LM339MX datasheet confirms these limits under Recommended Operating Conditions.
Does the LM339MX require dual power supplies?
No, the LM339MX is explicitly designed for single-supply operation from 2 V to 36 V DC, with input common-mode voltage range extending to ground (0 V). Dual-supply use (±1 V to ±18 V) is supported but optional. Its PNP input stage and open-collector outputs eliminate the need for negative rails in most threshold-detection applications - a core design advantage highlighted in the LMx39-N family description.
Can the LM339MX drive TTL and CMOS logic directly?
Yes, the LM339MX open-collector outputs are fully compatible with TTL, DTL, ECL, MOS, and CMOS logic families when used with appropriate external pull-up resistors. Its 250 mV saturation voltage at 4 mA ensures solid LOW-level assertion, while its ability to sink up to 16 mA allows direct interfacing with standard logic inputs without buffer stages - a feature confirmed in the "Features" and "Electrical Characteristics" sections of the SNOSBJ3E datasheet.
What is the maximum input voltage the LM339MX can tolerate?
The LM339MX differential input voltage rating is 36 V, and individual inputs may exceed V+ (e.g., 30 V input with 5 V supply) as long as the other input remains within the common-mode range. However, inputs must not go below −0.3 V relative to GND at 25°C to prevent damage. This overvoltage tolerance is documented in Absolute Maximum Ratings and Feature Description sections of the official TI datasheet SNOSBJ3E.
Is the LM339MX pin-compatible with other LM339 variants like LM339N or LM339D?
Yes, the LM339MX shares identical pin configuration and electrical functionality with all LM339-N series variants (including LM339N, LM339DR, and LM339D) in SOIC-14 packaging. Pin functions - such as OUTPUT1 on Pin 2, INPUT1+ on Pin 5, and GND on Pin 12 - are standardized across the family per the "Pin Configuration and Functions" section of SNOSBJ3E. Mechanical dimensions and solder profiles differ slightly, but PCB footprints are interchangeable.
LM339MX 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 ~ 36V, ±1V ~ 18V
- :
- 5mV @ 30V
- Voltage - Input Offset (Max):
- 0.25µA @ 5V
- Current - Input Bias (Max):
- 16mA @ 5V
- 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
LM339MX FAQ
1.How can I place an order for LM339MX through Aetrix?
Please submit a Request for Quotation (RFQ) for LM339MX 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 LM339MX reliable?
The price and inventory of LM339MX are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM339MX is usually 5 days.
3.What payment methods are accepted for LM339MX?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM339MX transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM339MX?
LM339MX orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM339MX 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 LM339MX?
For technical support, including LM339MX datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM339MX requirements.
6.How does Aetrix verify that LM339MX is sourced from the original manufacturer or authorized distributors?
All LM339MX 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 LM339MX meets industry standards.
7.What is the process for return or replacement of LM339MX?
All LM339MX units undergo pre-shipment inspection (PSI). If there is an issue with LM339MX, 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 LM339MX part is unused and in its original packaging.
Return procedure for LM339MX:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LM339MX 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…
