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Texas Instruments LP339N/PB
- Part No.:
- LP339N/PB
- Manufacturer:
- Texas Instruments
- Category:
- Comparators
- Package:
- 14-DIP (0.300", 7.62mm)
- Datasheet:
-
LP339N/PB.pdf
- Description:
- IC COMPARATOR 4 GEN PUR 14DIP
- Quantity:
- Payment:
- Shipping:
Inventory:4,831
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Product details
Overview
LP339N/PB from Texas Instruments (formerly National Semiconductor) is an ultra-low-power quad voltage comparator designed for single-supply operation with 60 µA typical supply current, ±2 mV input offset voltage, and ground-sensing capability - enabling direct interface with CMOS logic in battery-powered sensor monitoring and analog threshold detection systems.
For engineers reviewing the LP339N/PB datasheet, LP339N/PB pinout, LP339N/PB application, or LP339N/PB equivalent, this device is evaluated for low-quiescent-current limit detection, time-delay generation, and open-collector output OR-ing in industrial control and portable instrumentation designs.
Technical Context
The LP339N/PB integrates four independent PNP-input comparators with a common-mode input range extending to ground on single supplies and up to V+−1.5 V at 25°C. Its bi-modal Darlington/grounded-emitter output stage delivers 30 mA sink current at VO=2 V and ~700 µA at VO=0.4 V, supporting direct LED, relay, and buzzer drive without external transistors.
Input bias current is 3 nA (typ), offset current ±0.5 nA (typ), and response time as low as 1.3 µs under 100 mV step with 5 mV overdrive. Supply voltage range spans 2 V to 36 V (or ±18 V), with reverse-voltage protection on V+ and absolute input rating up to −0.3 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 typical - supports accurate 10-bit-equivalent threshold detection at 5 V |
| Input Bias Current | 3 nA typical - minimizes loading on high-impedance sensor sources (e.g., thermistors) |
| Output Sink Current | 30 mA at VO=2 V - drives LEDs or small relays directly without buffer stages |
| Common-Mode Range | Includes ground on single supply - allows direct sensing of 0 V referenced signals |
| Response Time | 1.3 µs (min) with 5 mV overdrive - suitable for pulse-width and zero-crossing timing |
| Supply Voltage Range | 2 V to 36 V DC - operates across wide input rails including 3.3 V, 5 V, 12 V, and 24 V systems |
Pinout & Package
Molded 14-pin PDIP package (NS Package Number N14A), 0.3" wide body, through-hole mounting compatible with standard DIP sockets and wave soldering (260°C, 10 sec).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2, 4, 5, 8, 9, 11, 12 | Comparator Inputs (+/−) | Four independent differential input pairs; each accepts inputs down to ground |
| 3, 6, 10, 13 | Open-Collector Outputs | Uncommitted collectors - support wired-OR, level-shifting, and pull-up to any rail ≤36 V |
| 7 | GND | Ground reference for all comparators and internal bias network |
| 14 | V+ | Single positive supply input; reverse-voltage protected; supports 2–36 V operation |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low supply current | 60 µA typical - reduces system standby power by >90% vs. LM339 (1.5 mA) |
| Ground-sensing input | Common-mode range includes 0 V on single supply - eliminates need for level-shifting in 0–Vref detection |
| CMOS-compatible output | Output sinks up to 30 mA and interfaces directly with 3.3 V/5 V CMOS logic inputs |
| PIN-to-PIN compatibility | Identical pinout to LM339 - enables drop-in replacement in legacy designs with no PCB change |
| Bi-modal output stage | Darlington mode (≥1.5 V) delivers high sink current; grounded-emitter mode (<0.8 V) ensures reliable low-VOL |
Applications
| Limit Detection in Battery Sensors | Time-Delay Generator for Industrial Controls |
|---|---|
|
Use Scenario: Monitoring battery voltage against low-charge and over-voltage thresholds in portable medical devices. IC Role / Device Role / Timing Role: Quad comparator performs simultaneous high/low limit detection with hysteresis on each channel. Use Value: 60 µA quiescent current extends battery life while maintaining real-time alert readiness without wake-up latency. |
Use Scenario: Generating precise 100 ms–5 s delay intervals in PLC I/O modules using RC timing networks. IC Role / Device Role / Timing Role: One comparator acts as threshold detector triggering monostable multivibrator built with external R-C and second comparator. Use Value: Bi-modal output drives timing capacitor discharge directly, eliminating external transistor and reducing BOM count by one active component. |
| LED Status Indicator Array | Zero-Crossing Detector for AC Mains |
|
Use Scenario: Driving three-color LED indicators (green/yellow/red) based on analog signal amplitude in test equipment front panels. IC Role / Device Role / Timing Role: Three comparators set distinct trip points; outputs wired-OR to shared current-limiting resistor and LED string. Use Value: 30 mA per output enables direct LED drive at full brightness without discrete drivers - simplifies layout and improves reliability. |
Use Scenario: Detecting AC line zero crossings in dimmer circuits and motor phase controllers operating from 120/230 VAC via resistive divider. IC Role / Device Role / Timing Role: Comparator compares divided AC waveform to 0 V reference; output triggers TRIAC gate timing. Use Value: Ground-referenced input allows direct connection to center-tapped divider - eliminates floating reference design complexity and improves noise immunity. |
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 1.5 mA supply current; wider input offset (±3 mV); same PDIP-14 pinout | Not suitable for battery-critical applications; acceptable where power budget >100 µA | Select LM339N/NOPB only when legacy cost sensitivity outweighs energy efficiency requirements |
| TLV339IPW | Rail-to-rail input; 1 µA supply current; SC-70-14 package; 1.8–5.5 V supply only | Requires level-shifting for >5.5 V systems; incompatible with 12/24 V industrial rails | Choose TLV339IPW for ultra-low-power sub-5 V portable designs where space and current are primary constraints |
Compared with LM339N/NOPB, LP339N/PB reduces supply current by 96% for extended battery runtime; versus TLV339IPW, it supports 2–36 V operation and maintains pin compatibility with legacy DIP layouts - making it optimal for retrofitting low-power capability into existing 14-pin DIP systems.
Availability
LP339N/PB is available at Aetrix Electronics and suitable for battery-powered instrumentation, industrial sensor interfaces, and legacy DIP-based control modules requiring stable component supply across long production lifecycles.
Supply support for LP339N/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 (TI) is a global semiconductor leader delivering analog, embedded processing, and connectivity solutions with emphasis on reliability, longevity, and industrial-grade performance.
The LP339N/PB belongs to TI's legacy precision analog comparator family, engineered specifically for ultra-low-power, ground-sensing, single-supply operation in portable and maintenance-free monitoring systems.
FAQ
What is the maximum supply voltage for LP339N/PB?
The LP339N/PB supports a maximum supply voltage of 36 VDC (or ±18 VDC in split-supply configurations). Absolute maximum rating is 36 V on V+, and the device includes reverse-voltage protection on the supply pin. Operation above 30 V is possible but requires verification of power dissipation limits per the thermal data in the datasheet.
Does LP339N/PB support true ground-referenced input operation?
Yes, LP339N/PB features an input common-mode voltage range that explicitly includes ground (0 V) even when powered from a single supply - confirmed in both the General Description and Electrical Characteristics tables. This allows direct comparison of signals referenced to system ground without level-shifting circuitry.
Can LP339N/PB outputs be wired together for OR logic?
Yes, LP339N/PB outputs are open-collector uncommitted collectors, enabling direct wired-OR connections. Multiple outputs can share a single pull-up resistor to any voltage rail within the 2–36 V range - a key feature used in alarm consolidation and priority interrupt generation circuits.
Is LP339N/PB pin-compatible with LM339?
Yes, LP339N/PB has identical pinout and footprint to LM339N/NOPB per National Semiconductor documentation. It is a direct drop-in replacement in PDIP-14 layouts, retaining the same terminal assignments for inputs, outputs, V+, and GND - verified in the "Order Number LP339N for Dual-In-Line Package" section.
What is the typical output sink current of LP339N/PB at 0.4 V output voltage?
The LP339N/PB delivers approximately 700 µA of sink current at VO = 0.4 VDC, corresponding to its grounded-emitter output mode. This value is specified in the Application Hints section and confirmed in the Typical Performance Characteristics graphs - enabling reliable low-VOL operation for CMOS logic interfacing.
LP339N/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:
- 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):
- 10mA @ 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/PB FAQ
1.How can I place an order for LP339N/PB through Aetrix?
Please submit a Request for Quotation (RFQ) for LP339N/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 LP339N/PB reliable?
The price and inventory of LP339N/PB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LP339N/PB is usually 5 days.
3.What payment methods are accepted for LP339N/PB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LP339N/PB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LP339N/PB?
LP339N/PB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LP339N/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 LP339N/PB?
For technical support, including LP339N/PB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LP339N/PB requirements.
6.How does Aetrix verify that LP339N/PB is sourced from the original manufacturer or authorized distributors?
All LP339N/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 LP339N/PB meets industry standards.
7.What is the process for return or replacement of LP339N/PB?
All LP339N/PB units undergo pre-shipment inspection (PSI). If there is an issue with LP339N/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 LP339N/PB part is unused and in its original packaging.
Return procedure for LP339N/PB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LP339N/PB Tags
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