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Texas Instruments LM339N/PB
- Part No.:
- LM339N/PB
- Manufacturer:
- Texas Instruments
- Category:
- Comparators
- Package:
- 14-DIP (0.300", 7.62mm)
- Datasheet:
-
LM339N/PB.pdf
- Description:
- IC COMPARATOR 4 GEN PUR 14DIP
- Quantity:
- Payment:
- Shipping:
Inventory:1,142
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Product details
Overview
LM339N/PB from Texas Instruments is a quad open-collector voltage comparator IC designed for industrial analog-to-digital interface applications. It features ±3 mV maximum input offset voltage, 0.8 mA typical supply current per comparator, 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 signals near 0 V in battery-powered or single-rail systems.
For engineers reviewing the LM339N/PB datasheet, LM339N/PB pinout, LM339N/PB application, or LM339N/PB 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 designs, and wide temperature range (0°C to +70°C) suitable for consumer and industrial control circuits.
Technical Context
The LM339N/PB integrates four independent high-gain comparators with PNP input stages, enabling input voltages down to −0.3 V relative to GND without damage. Its uncommitted NPN output transistors support wired-OR logic, level-shifting up to 36 V, and sink currents up to 16 mA with 250 mV saturation voltage at 4 mA load.
It uses no antisaturation clamps, resulting in ultra-low output leakage (0.1 nA typical), making it ideal for high-impedance node switching. The bias network delivers supply-voltage-independent current draw across 2–36 V, and differential input voltage tolerance extends to ±36 V - exceeding the supply rails without degradation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 2 V to 36 V single supply (±1 V to ±18 V dual supply) - supports wide-input industrial power rails and battery operation. |
| Input Offset Voltage | ±3 mV max - enables precise threshold detection in sensor interfaces and limit comparators. |
| Supply Current (per comparator) | 0.8 mA typical - allows four-channel comparison with <3.2 mA total draw at 5 V, ideal for low-power systems. |
| Input Bias Current | 25 nA max - minimizes loading on high-impedance sources like thermistors or photodiodes. |
| Output Saturation Voltage | 250 mV at 4 mA sink - ensures strong LOW-level assertion for TTL/CMOS inputs even under moderate load. |
| Input Common-Mode Range | Includes GND (0 V) up to V+ −1.5 V - permits direct interfacing with ground-referenced sensors and ADC references. |
| Output Type | Open-collector NPN - enables flexible pull-up to any compatible voltage (≤36 V) and wired-OR logic implementation. |
Pinout & Package
LM339N/PB is packaged in a 14-pin plastic DIP (PDIP) with body size 19.177 mm × 6.35 mm. Pin numbering follows standard dual-in-line layout with notch-up orientation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | OUTPUT2 | Open-collector output of Comparator 2 - requires external pull-up; sinks current when active LOW. |
| 2 | OUTPUT1 | Open-collector output of Comparator 1 - independently controllable; supports wired-OR with other comparators. |
| 3 | V+ | Positive supply input - accepts 2–36 V DC; powers all four comparators and bias network. |
| 4 | INPUT1− | Inverting input of Comparator 1 - used for reference or feedback connection in threshold detection. |
| 5 | INPUT1+ | Noninverting input of Comparator 1 - accepts signal to be compared against reference at Pin 4. |
| 6 | INPUT2− | Inverting input of Comparator 2 - supports dual-threshold or window comparator configurations. |
| 7 | INPUT2+ | Noninverting input of Comparator 2 - enables independent signal monitoring per channel. |
| 8 | INPUT3− | Inverting input of Comparator 3 - allows three-level detection or cascaded logic functions. |
| 9 | INPUT3+ | Noninverting input of Comparator 3 - expands multi-channel analog decision capability. |
| 10 | INPUT4− | Inverting input of Comparator 4 - supports full quad-comparator utilization in complex control schemes. |
| 11 | INPUT4+ | Noninverting input of Comparator 4 - completes four independent analog comparison paths. |
| 12 | GND | Ground reference - return path for supply and input/output signals; must be low-impedance. |
| 13 | OUTPUT4 | Open-collector output of Comparator 4 - provides fourth independent digital decision output. |
| 14 | OUTPUT3 | Open-collector output of Comparator 3 - complements OUTPUT1–OUTPUT4 for full quad functionality. |
Key Features
| Feature | Design Value |
|---|---|
| Input common-mode range includes GND | Enables direct sensing of 0 V–referenced signals (e.g., thermocouples, current-sense shunts) without level-shifting circuitry. |
| Open-collector outputs with 16 mA sink capability | Supports interface to multiple logic families (TTL, CMOS, ECL) and enables wired-OR logic for alarm consolidation. |
| Low 0.8 mA supply current per comparator | Reduces system power budget in battery-operated devices such as portable test equipment and IoT edge sensors. |
| ±3 mV max input offset voltage | Ensures accurate threshold crossing in precision applications like overvoltage protection and analog window detection. |
| Differential input voltage tolerance up to ±36 V | Permits safe operation with input signals exceeding V+, simplifying front-end design in noisy industrial environments. |
Applications
| Limit Comparator | Simple Analog-to-Digital Converter |
|---|---|
Use Scenario: Monitoring battery voltage to trigger low-battery warning at 3.2 V cutoff. IC Role / Device Role / Timing Role: Quad comparator configured as window detector with upper/lower thresholds; LM339N/PB compares sensed voltage against two reference levels. Use Value: Eliminates need for microcontroller ADC polling; provides immediate, deterministic digital alert with <1 µs response time. |
Use Scenario: Converting linear potentiometer position into 2-bit digital code for motor direction control. IC Role / Device Role / Timing Role: LM339N/PB channels act as successive threshold comparators feeding combinational logic. Use Value: Achieves 4-state resolution using only passive resistors and open-collector outputs-no clock or firmware required. |
| Pulse Generator | Zero-Crossing Detector |
Use Scenario: Generating fixed-width pulses from AC line zero-crossings for phase-controlled dimming. IC Role / Device Role / Timing Role: LM339N/PB configured as Schmitt trigger with hysteresis; converts sine wave to clean square wave. Use Value: Delivers jitter-free timing edges with 300 ns propagation delay, enabling precise TRIAC firing angle control. |
Use Scenario: Detecting AC mains polarity reversal in single-supply energy metering front-ends. IC Role / Device Role / Timing Role: LM339N/PB compares transformer-coupled AC signal to GND reference with fast transition response. Use Value: Input common-mode range including GND allows direct GND-referenced detection without biasing networks. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar quad comparator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM339DR | SOIC-14 package (8.65 mm × 3.91 mm); identical electrical specs and pinout. | Better suited for automated SMT assembly and space-constrained PCBs. | Select LM339DR for surface-mount production; LM339N/PB remains optimal for through-hole prototyping or legacy DIP layouts. |
| LM2901DT | Wider operating temperature range (−40°C to +85°C); otherwise identical pinout and core specs. | Required for automotive cabin modules or outdoor industrial controllers exposed to extended thermal cycling. | Choose LM2901DT where ambient temperature exceeds +70°C; LM339N/PB is validated for commercial-grade 0°C–70°C use. |
Compared with LM339DR and LM2901DT, LM339N/PB offers proven reliability in through-hole industrial control boards, maintains full functional compatibility, and provides cost-effective replacement in legacy DIP-based designs without layout changes.
Availability
LM339N/PB is available at Aetrix Electronics and suitable for industrial control panels, battery management systems, and consumer appliance power supervision requiring stable component supply and long-term obsolescence management.
Supply support for LM339N/PB 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 design.
LM339N/PB belongs to TI's legacy precision comparator product line, engineered for robust industrial signal conditioning, analog threshold detection, and cost-sensitive mixed-signal interface applications.
FAQ
What is the maximum supply voltage for LM339N/PB?
The LM339N/PB supports a maximum supply voltage of 36 VDC in single-supply mode and ±18 VDC in dual-supply mode. Absolute maximum ratings specify 36 V across V+ and GND; exceeding this may cause permanent damage. Operation within the recommended 2–36 V range ensures specified performance across the full 0°C to +70°C temperature range.
Does LM339N/PB require a dual power supply?
No, LM339N/PB is explicitly designed for single-supply operation with input common-mode range extending to GND. It functions correctly with only V+ and GND connections. Dual supplies (±1 V to ±18 V) are optional and used only when negative input signals or symmetric rail requirements exist - not necessary for standard threshold detection or logic interfacing.
Can LM339N/PB drive TTL and CMOS loads directly?
Yes, LM339N/PB outputs are open-collector and fully compatible with TTL, DTL, ECL, MOS, and CMOS logic families. When paired with an appropriate pull-up resistor (e.g., 4.7 kΩ to 5 V), it delivers valid LOW-level voltage ≤250 mV at 4 mA sink current and HIGH-level voltage equal to the pull-up rail - meeting all standard logic interface requirements.
What is the input offset voltage specification for LM339N/PB?
The LM339N/PB has a maximum input offset voltage of ±3 mV at 25°C, as specified in the Electrical Characteristics table for LM339/LM339A devices. This value ensures reliable threshold accuracy in precision applications such as overvoltage lockout and sensor trip-point detection without calibration.
How does the open-collector output of LM339N/PB function in practice?
The LM339N/PB output transistor acts as a grounded-emitter switch: it pulls the output pin to near-GND (≤250 mV at 4 mA) when active, and presents high impedance (leakage ≤0.1 nA) when inactive. An external pull-up resistor is mandatory to define the HIGH state voltage - which can be set independently of V+, enabling level translation up to 36 V.
LM339N/PB Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Package/Case:
- 14-DIP (0.300", 7.62mm)
- Series:
- -
- Packaging:
- Tube
- 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:
- Through Hole
- :
- 14-PDIP
LM339N/PB FAQ
1.How can I place an order for LM339N/PB through Aetrix?
Please submit a Request for Quotation (RFQ) for LM339N/PB 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/PB reliable?
The price and inventory of LM339N/PB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM339N/PB is usually 5 days.
3.What payment methods are accepted for LM339N/PB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM339N/PB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM339N/PB?
LM339N/PB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM339N/PB 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/PB?
For technical support, including LM339N/PB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM339N/PB requirements.
6.How does Aetrix verify that LM339N/PB is sourced from the original manufacturer or authorized distributors?
All LM339N/PB 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/PB meets industry standards.
7.What is the process for return or replacement of LM339N/PB?
All LM339N/PB units undergo pre-shipment inspection (PSI). If there is an issue with LM339N/PB, 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/PB part is unused and in its original packaging.
Return procedure for LM339N/PB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LM339N/PB Tags
-
LM2903DR
Texas Instruments
-
LM339DR
Texas Instruments
-
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
-
LM239DR
Texas Instruments
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LM339APWR
Texas Instruments
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LM2903P
Texas Instruments
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LM393ADR
Texas Instruments
-
NCX2200GMAZ
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