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Texas Instruments LM339N
- Part No.:
- LM339N
- Manufacturer:
- Texas Instruments
- Category:
- Comparators
- Package:
- 14-DIP (0.300", 7.62mm)
- Datasheet:
-
LM339N.pdf
- Description:
- IC COMPARATOR 4 DIFF 14DIP
- Quantity:
- Payment:
- Shipping:
Inventory:12,447
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Product details
Overview
LM339N from STMicroelectronics is a low-power quad voltage comparator IC designed for single-supply operation (2–36 V) or dual supplies (±1 V to ±18 V), featuring ±1 mV typical input offset voltage, 25 nA typical input bias current, and rail-to-rail input common-mode range including ground - used in level detection, window comparators, and analog-to-digital interface circuits.
For engineers reviewing the LM339N datasheet, LM339N pinout, LM339N application, or LM339N equivalent, key selection criteria include input offset voltage stability over temperature, output sink capability (6–16 mA), single-supply ground-sensing capability, and compatibility with TTL/CMOS logic families in industrial control and power management systems.
Technical Context
The LM339N employs PNP-input differential pairs enabling input common-mode voltage down to ground on single supply, with open-collector outputs that support wired-OR logic and level translation across voltage domains. Its large-signal voltage gain exceeds 50 V/mV at 15 V supply with 15 kΩ load.
It operates across 0 °C to +70 °C ambient, supports differential input voltages up to ±36 V, and maintains 1.1 mA typical supply current independent of supply voltage - critical for battery-powered and energy-conscious designs requiring stable threshold detection without rail splitting.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | +2 V to +36 V (single) or ±1 V to ±18 V (dual) - enables direct integration into 3.3 V, 5 V, 12 V, and 24 V systems without level shifters. |
| Input Offset Voltage | ±1 mV typ - ensures accurate threshold detection within 1 mV tolerance at room temperature, critical for precision window comparators. |
| Input Bias Current | 25 nA typ - minimizes loading on high-impedance sensor sources (e.g., thermistors, photodiodes) without external buffering. |
| Output Sink Current | 6 mA min at VO = 1.5 V - drives LEDs, relays, or TTL inputs directly without external pull-up resistors below 10 kΩ. |
| Response Time | 1.3 μs typ (100 mV step, 5 mV overdrive) - supports kHz-range signal monitoring in motor commutation or PWM feedback loops. |
| Common-Mode Input Range | 0 V to (VCC − 1.5 V) - allows ground-referenced inputs on single supply, eliminating need for negative rail in sensor front-ends. |
| ESD Rating | 500 V HBM - meets basic handling robustness requirements for manual assembly and board-level testing. |
Pinout & Package
LM339N is supplied in a 14-pin plastic DIP (Dual In-line Package), designated as "N" suffix per STMicroelectronics ordering code convention. This through-hole package supports wave soldering and prototyping breadboard use.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Output 1 | Open-collector output - requires external pull-up to define logic HIGH level; sinks up to 16 mA. |
| 2 | Inverting Input 1 | Differential input terminal for comparator 1 - accepts signals down to ground on single supply. |
| 3 | Non-inverting Input 1 | Differential input terminal for comparator 1 - supports common-mode range to VCC − 1.5 V. |
| 4 | GND | Ground reference for all comparators and internal circuitry - shared return path for all four channels. |
| 5 | Non-inverting Input 2 | Differential input terminal for comparator 2 - electrically identical to Pin 3. |
| 6 | Inverting Input 2 | Differential input terminal for comparator 2 - electrically identical to Pin 2. |
| 7 | Output 2 | Open-collector output - independent of Output 1; supports wired-OR with other comparators. |
| 8 | Output 3 | Open-collector output - third independent channel; shares GND (Pin 4) and VCC (Pin 14). |
| 9 | Inverting Input 3 | Differential input terminal for comparator 3 - matches electrical behavior of Pins 2 and 6. |
| 10 | Non-inverting Input 3 | Differential input terminal for comparator 3 - matches electrical behavior of Pins 3 and 5. |
| 11 | Output 4 | Open-collector output - fourth independent channel; fully decoupled from others except shared supply rails. |
| 12 | Inverting Input 4 | Differential input terminal for comparator 4 - completes quad configuration; supports same voltage ranges. |
| 13 | Non-inverting Input 4 | Differential input terminal for comparator 4 - enables four independent threshold comparisons on one IC. |
| 14 | VCC | Positive supply rail - powers all four comparators; accepts 2–36 V DC or connects to +V in dual-supply mode. |
Key Features
| Feature | Design Value |
|---|---|
| Single-supply ground-sensing input | Input common-mode range includes 0 V - eliminates need for negative supply in sensor interfaces like thermistor bridges. |
| Low quiescent current | 1.1 mA typical across full supply range - extends battery life in portable instrumentation and remote sensors. |
| Wide supply voltage flexibility | Operates from 2 V to 36 V - supports direct use in automotive (12 V), industrial (24 V), and legacy 5 V logic systems. |
| Open-collector outputs | Four independent sinking outputs - enable wired-OR logic, mixed-voltage interfacing, and direct LED/relay drive. |
| High ESD tolerance | 500 V HBM rating - reduces risk of field failure during handling and board assembly without added protection. |
Applications
| Overvoltage Protection Circuit | Zero-Crossing Detector |
|---|---|
|
Use Scenario: Monitoring DC bus voltage in a 24 V power supply to trigger shutdown if >26 V. IC Role / Device Role / Timing Role: Quad comparator configured as window detector with hysteresis, comparing sensed voltage against upper/lower thresholds. Use Value: Prevents downstream component damage by asserting fault signal within 1.3 μs of overvoltage event, using only one IC and passive components. |
Use Scenario: Detecting AC line zero crossings in a microcontroller-based dimmer or motor phase controller. IC Role / Device Role / Timing Role: Comparator compares rectified AC waveform to ground reference, generating clean digital edge synchronized to mains cycle. Use Value: Enables precise phase-angle control with <1° timing jitter due to ±1 mV offset and rail-to-rail input capability on single supply. |
| Temperature Threshold Monitor | LED Status Indicator Driver |
|
Use Scenario: Reading NTC thermistor voltage divider to activate cooling fan above 60 °C in embedded thermal management. IC Role / Device Role / Timing Role: Single comparator channel compares thermistor-derived voltage to fixed reference, driving fan enable line. Use Value: Achieves ±0.5 °C accuracy at 60 °C using 25 nA input bias current to avoid thermistor self-heating errors. |
Use Scenario: Driving multiple status LEDs (power-on, fault, standby) from microcontroller GPIO pins with current limiting. IC Role / Device Role / Timing Role: Open-collector outputs sink LED current directly, eliminating need for discrete transistors or current-limiting resistors per LED. Use Value: Reduces BOM count by 4x vs. discrete transistor solution while supporting 6–16 mA per LED at <250 mV saturation voltage. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar quad voltage comparator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM339DR (SO-14) | Same electrical specs, surface-mount SOIC-14 package - no through-hole mounting or breadboard compatibility. | Preferred for automated PCB assembly; unsuitable for hand-soldered prototypes or DIP sockets. | Select when board space is constrained and reflow soldering is available. |
| TL331 (single-channel) | Single comparator, SOT-23 package, higher input offset (±3 mV max), lower supply current (40 μA). | Used where only one comparison is needed and ultra-low power dominates size constraints. | Choose for battery-powered single-threshold detection; not a drop-in replacement for quad functionality. |
Compared with LM339DR, LM339N offers mechanical compatibility with legacy through-hole layouts and lab prototyping, while TL331 trades channel count and offset precision for extreme power savings - making LM339N optimal for multi-threshold, ground-referenced, and development-stage designs.
Availability
LM339N is available at Aetrix Electronics and suitable for industrial control panels, power supply monitoring systems, and embedded thermal management requiring stable component supply with long-term DIP-package availability.
Supply support for LM339N 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
STMicroelectronics is a global semiconductor leader headquartered in Geneva, Switzerland, designing and manufacturing analog, MCU, power, and sensing solutions for industrial, automotive, and consumer markets.
The LM339 series belongs to ST's precision analog comparators product line, engineered specifically for reliable threshold detection in cost-sensitive, single-supply industrial and power systems where ground-referenced sensing and logic interfacing are essential.
FAQ
What is the maximum output sink current for LM339N at 25 °C?
The LM339N delivers a minimum output sink current of 6 mA when VO = 1.5 V and VID = 1 V, with typical performance reaching 16 mA under the same conditions. This value is specified across the full operating temperature range (0 °C to +70 °C) and remains stable regardless of supply voltage between 2 V and 36 V.
Can LM339N operate with a single 3.3 V supply?
Yes - LM339N is fully specified for single-supply operation from +2 V to +36 V, including 3.3 V. Its input common-mode range extends to ground, and output saturation voltage remains ≤400 mV at 4 mA sink, ensuring clean logic-level transitions into 3.3 V CMOS inputs without level shifting.
Does LM339N require external pull-up resistors on its outputs?
Yes - all four outputs are open-collector and must be pulled up externally to define the HIGH state voltage level. Recommended pull-up values range from 1 kΩ (for fast switching into heavy loads) to 10 kΩ (for low-power logic interfacing); no internal pull-ups are present.
How does LM339N differ from LM393 in pin compatibility and function?
LM339N contains four independent comparators in a 14-pin DIP, whereas LM393 is a dual comparator in an 8-pin DIP. They share identical electrical characteristics per channel but differ in channel count and pinout - LM339N is not pin-compatible with LM393, and substituting one for the other requires PCB layout changes and signal routing adjustments.
LM339N Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Package/Case:
- 14-DIP (0.300", 7.62mm)
- Series:
- -
- Packaging:
- Tube
- 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:
- Through Hole
- :
- 14-PDIP
LM339N FAQ
1.How can I place an order for LM339N through Aetrix?
Please submit a Request for Quotation (RFQ) for LM339N 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 LM339N reliable?
The price and inventory of LM339N are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM339N is usually 5 days.
3.What payment methods are accepted for LM339N?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM339N transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM339N?
LM339N orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM339N 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 LM339N?
For technical support, including LM339N datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM339N requirements.
6.How does Aetrix verify that LM339N is sourced from the original manufacturer or authorized distributors?
All LM339N 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 LM339N meets industry standards.
7.What is the process for return or replacement of LM339N?
All LM339N units undergo pre-shipment inspection (PSI). If there is an issue with LM339N, 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 LM339N part is unused and in its original packaging.
Return procedure for LM339N:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LM339N Tags
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LM2903DR
Texas Instruments
-
LM339DR
Texas Instruments
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LM339PWR
Texas Instruments
-
LM393DT
STMicroelectronics
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LM2901PWR
Texas Instruments
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LM2903DT
STMicroelectronics
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LM393DR
Texas Instruments
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LM239DR
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LM339APWR
Texas Instruments
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LM2903P
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LM393ADR
Texas Instruments
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NCX2200GMAZ
NXP Semiconductors
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