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Texas Instruments LP339N/NOPB
- Part No.:
- LP339N/NOPB
- Manufacturer:
- Texas Instruments
- Category:
- Comparators
- Package:
- 14-DIP (0.300", 7.62mm)
- Datasheet:
-
LP339N/NOPB.pdf
- Description:
- IC COMPARATOR 4 GEN PUR 14DIP
- Quantity:
- Payment:
- Shipping:
Inventory:764
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Product details
Overview
LP339N/NOPB from Texas Instruments (formerly National Semiconductor) is an ultra-low-power quad voltage comparator IC designed for single-supply operation with 60 µA typical supply current, ±2 mV input offset voltage, and ground-sensing capability-ideal for battery-powered limit detection and CMOS logic interfacing.
For engineers reviewing the LP339N/NOPB datasheet, LP339N/NOPB pinout, LP339N/NOPB application, or LP339N/NOPB equivalent, this device supports precision threshold monitoring in portable instrumentation, low-voltage sensor interfaces, and discrete analog-to-digital conversion circuits where power efficiency and rail-to-ground input range are critical.
Technical Context
The LP339N/NOPB integrates four independent PNP-input comparators with a bi-modal Darlington/grounded-emitter output stage, enabling 30 mA sink capability at VO = 2 VDC while maintaining ultra-low quiescent current across 2–30 VDC supply range. Its input common-mode range includes ground on single supply, eliminating level-shifting needs for 0 V referenced signals.
Each comparator features 3 nA max input bias current, ±0.5 nA input offset current, and 1.3 µs typical response time under 100 mV step with 5 mV overdrive-optimized for fast, low-power decision-making in timing generators, multivibrators, and LED/relay drivers without external pull-ups to V+.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Current | 60 µA typical - enables multi-year battery life in always-on sensing nodes |
| Input Offset Voltage | ±2 mV - supports accurate 10-bit-equivalent threshold detection at 5 V reference |
| Input Bias Current | 3 nA - minimizes loading on high-impedance sensor sources (e.g., thermistors, photodiodes) |
| Output Sink Current | 30 mA at VO = 2 VDC - directly drives LEDs, small relays, or MOSFET gates without buffer stages |
| Common-Mode Range | Includes ground on single supply - allows direct interface to 0 V-referenced transducers |
| Response Time | 1.3 µs (100 mV step, 5 mV overdrive) - suitable for pulse width modulation and time-delay generation |
| Supply Voltage Range | 2–30 VDC or ±18 VDC - supports wide-input industrial and automotive auxiliary rails |
Pinout & Package
LP339N/NOPB is housed in a 14-pin molded dual-in-line package (PDIP, NS Package N14A), lead-free (NIPDAU), RoHS-compliant, with 0–70°C operating temperature range and Level-1 moisture sensitivity rating.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2, 3, 4, 5, 6, 7 | Comparator Inputs (IN−/IN+) & Outputs | Pins 1–3: Comp A inputs (1=IN−, 2=IN+, 3=OUT); Pins 4–6: Comp B (4=IN−, 5=IN+, 6=OUT); Pins 8–10: Comp C (8=IN−, 9=IN+, 10=OUT); Pins 12–14: Comp D (12=IN−, 13=IN+, 14=OUT) |
| 8, 9, 10, 11, 12, 13, 14 | Comparator Inputs (IN−/IN+) & Outputs | Pin 11 = V− (GND on single supply); Pin 14 = Comp D OUT; matches LM339 pinout for drop-in replacement in legacy designs |
| 11 | Power Supply Reference | Ground terminal for single-supply operation; connects to system GND - required for ground-sensing functionality |
| 14 | Comparator D Output | Open-collector output capable of sinking up to 30 mA - requires external pull-up to any compatible voltage ≤36 VDC |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low supply current | 60 µA per device - reduces standby power in portable medical monitors and IoT edge sensors |
| Ground-sensing input range | Common-mode extends to 0 V on single supply - eliminates need for negative bias in transducer front-ends |
| CMOS-logic-compatible output | Output sinks to <0.4 V at 700 µA - ensures clean TTL/CMOS logic-level transitions without level shifters |
| Darlington output mode | 30 mA sink at VO ≥1.5 V - enables direct driving of indicator LEDs or small solenoids |
| Reverse supply protection | Withstands −0.3 V on any pin - improves robustness during hot-plug or board-level ESD events |
Applications
| Portable Battery Monitor | Industrial Limit Switch Interface |
|---|---|
|
Use Scenario: Monitoring cell voltage thresholds in 4-cell Li-ion packs to trigger low-battery alerts and cutoff. IC Role / Device Role / Timing Role: Quad comparator performs simultaneous under-voltage (UVLO), over-voltage (OVLO), charge-complete, and thermal fault comparisons. Use Value: 60 µA total supply current extends battery runtime by >20% vs. standard comparators; ground-sensing enables direct connection to bottom-cell reference. |
Use Scenario: Converting mechanical limit switch closures into clean digital signals for PLC input modules. IC Role / Device Role / Timing Role: Each comparator conditions one switch signal, rejecting contact bounce and noise via hysteresis. Use Value: Input bias current <3 nA prevents false triggering from leakage across dirty contacts; open-collector outputs interface directly with 24 VDC PLC inputs. |
| Audio Peak Detector | Time-Delay Generator |
|
Use Scenario: Implementing three-level LED bar graph display for audio signal amplitude in consumer mixers. IC Role / Device Role / Timing Role: Three comparators set fixed thresholds (−10 dB, 0 dB, +6 dB); fourth comparator enables strobing. Use Value: ±2 mV offset ensures consistent LED activation points across units; CMOS-compatible outputs drive LEDs without current-limiting resistors. |
Use Scenario: Generating precise 100 ms–5 s delays for motor start sequencing in HVAC control panels. IC Role / Device Role / Timing Role: One comparator acts as threshold detector for RC ramp; second provides hysteresis for clean edge generation. Use Value: Bi-modal output delivers 30 mA sink to charge/discharge timing capacitors rapidly; 1.3 µs response ensures sub-millisecond delay accuracy. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar quad comparator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM339N/NOPB | Higher supply current (500 µA typical), wider input offset (±3 mV), no ground-sensing on single supply | Better suited for non-battery systems with higher noise immunity requirements | Select when cost sensitivity outweighs power budget constraints and ground-referenced inputs are not required |
| TLV339IPW | Lower supply current (350 nA), rail-to-rail input, push-pull output, 14-pin TSSOP only | Requires PCB redesign; incompatible with through-hole layouts; superior for ultra-low-power precision sensing | Choose for new designs targeting nanoampere standby; avoid for LP339N/NOPB drop-in upgrades |
Compared with LM339N/NOPB, LP339N/NOPB cuts supply current by 90% and adds true ground-sensing-critical for battery voltage monitoring. Versus TLV339IPW, it trades 100× lower power for through-hole compatibility and proven industrial reliability, making it optimal for legacy-replacement and cost-sensitive embedded systems.
Availability
LP339N/NOPB is available at Aetrix Electronics and suitable for portable instrumentation, industrial control interfaces, and audio signal processing requiring stable component supply across long production lifecycles.
Supply support for LP339N/NOPB 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 (TI) is a global semiconductor leader delivering analog and embedded processing solutions, with heritage from National Semiconductor's precision analog portfolio.
The LP339N/NOPB belongs to TI's legacy ultra-low-power comparator family, engineered specifically for battery-operated equipment and CMOS-compatible signal conditioning where minimal quiescent current and ground-referenced operation are essential.
FAQ
What is the maximum supply voltage for LP339N/NOPB?
The LP339N/NOPB supports a maximum supply voltage of 36 VDC on single supply or ±18 VDC on split supplies. Absolute maximum ratings specify differential input voltage up to ±36 VDC and input voltage range from −0.3 VDC to 36 VDC. Exceeding these limits risks permanent damage, so design margins should maintain at least 10% headroom under worst-case transients.
Does LP339N/NOPB support true ground-referenced input operation?
Yes, LP339N/NOPB features an input common-mode voltage range that includes ground (0 VDC) even when operated from a single positive supply. This allows direct comparison of signals referenced to system ground-such as thermistor dividers or current-sense amplifiers-without level-shifting circuitry, a key advantage over LM339-series devices.
Can LP339N/NOPB outputs be wired together for OR logic?
Yes, LP339N/NOPB outputs are open-collector and uncommitted, allowing multiple outputs to be tied together with a single pull-up resistor to implement wired-OR logic. This is commonly used in alarm consolidation circuits where any comparator trip activates a shared interrupt line-no additional logic gates or isolation diodes are required.
What is the typical response time of LP339N/NOPB under standard test conditions?
The LP339N/NOPB achieves a typical response time of 1.3 µs for a 100 mV input step with 5 mV overdrive at V+ = 5 VDC and TA = 25°C. With larger overdrive (e.g., 1 V), response improves to ~800 ns. This speed supports reliable pulse detection in squarewave oscillators and time-delay generators without added propagation delay.
Is LP339N/NOPB pin-compatible with LM339N/NOPB?
Yes, LP339N/NOPB uses identical pinout and footprint to LM339N/NOPB (NS Package N14A), enabling direct drop-in replacement in existing designs. However, due to its ultra-low-power architecture and ground-sensing capability, designers must verify that the reduced input bias current (<3 nA vs. 250 nA) does not affect hysteresis network stability or reference divider loading in legacy circuits.
LP339N/NOPB 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:
- CMOS, MOS, Open-Collector
- Voltage - Supply, Single/Dual (±):
- 2V ~ 36V, ±1V ~ 18V
- :
- 5mV @ 5V
- Voltage - Input Offset (Max):
- 0.025µA @ 5V
- Current - Input Bias (Max):
- 30mA @ 5V
- Current - Output (Typ):
- 100µA
- Current - Quiescent (Max):
- -
- CMRR, PSRR (Typ):
- -
- Propagation Delay (Max):
- -
- Hysteresis:
- 0°C ~ 70°C
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- Through Hole
- :
- 14-PDIP
LP339N/NOPB FAQ
1.How can I place an order for LP339N/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LP339N/NOPB 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 LP339N/NOPB reliable?
The price and inventory of LP339N/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LP339N/NOPB is usually 5 days.
3.What payment methods are accepted for LP339N/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LP339N/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LP339N/NOPB?
LP339N/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LP339N/NOPB 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 LP339N/NOPB?
For technical support, including LP339N/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LP339N/NOPB requirements.
6.How does Aetrix verify that LP339N/NOPB is sourced from the original manufacturer or authorized distributors?
All LP339N/NOPB 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 LP339N/NOPB meets industry standards.
7.What is the process for return or replacement of LP339N/NOPB?
All LP339N/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LP339N/NOPB, 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 LP339N/NOPB part is unused and in its original packaging.
Return procedure for LP339N/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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