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Texas Instruments LP339D
- Part No.:
- LP339D
- Manufacturer:
- Texas Instruments
- Category:
- Comparators
- Package:
- 14-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
LP339D.pdf
- Description:
- IC COMPARATOR 4 GEN PUR 14SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:452
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Product details
Overview
LP339D from Texas Instruments is a low-power quadruple voltage comparator IC designed for single-supply operation across 3 V to 30 V, featuring 60 µA typical supply current, ±2 mV input offset voltage, and 30 mA output sink capability at VO = 2 V - used in battery-powered limit detection and analog-to-digital conversion circuits.
For engineers reviewing the LP339D datasheet, LP339D pinout, LP339D application, or LP339D equivalent, this page delivers verified technical context, package-confirmed pin functions, real-world use cases, and two validated alternative comparators with documented functional and thermal differences.
Technical Context
The LP339D implements four independent p-n-p input stage comparators with uncommitted open-collector outputs, enabling wired-OR logic and flexible pull-up voltage selection up to 36 V. Its bimodal output structure provides 30 mA sink current above 1.5 V (Darlington mode) and ~700 µA below 0.4 V (ground-emitter mode).
It supports common-mode input voltages from ground to VCC − 2 V across its full operating range (0°C to 70°C), features reverse-voltage protected power inputs, and maintains ultralow bias current (±0.5 nA offset, 3 nA bias) independent of supply voltage - critical for high-impedance sensor interfacing.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 3 V to 30 V - enables direct interface with 5 V, 12 V, and 24 V industrial rails without regulation. |
| Supply Current (Typ) | 60 µA - allows multi-year operation on coin-cell batteries in portable monitoring systems. |
| Input Offset Voltage (Max) | ±5 mV at 25°C - ensures reliable threshold detection within ±5 mV accuracy for precision level sensing. |
| Output Sink Current | 30 mA at VO = 2 V - directly drives LEDs, small relays, or TTL/CMOS logic without external buffers. |
| Input Bias Current (Typ) | 3 nA - minimizes loading error when connected to high-impedance sources like thermistors or photodiodes. |
| Common-Mode Input Range | 0 V to VCC − 2 V - supports rail-to-rail input sensing including ground-referenced signals. |
| Operating Temperature | 0°C to 70°C - qualified for commercial-grade embedded control and instrumentation applications. |
Pinout & Package
LP339D is housed in a 14-pin SOIC (D) package with 1.27 mm pitch, 8.75 mm × 3.9 mm body, and 1.75 mm max height - compatible with standard surface-mount reflow profiles (MSL Level-1).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2, 5, 6, 8, 9, 12, 13 | Comparator Inputs (IN+, IN−) | Four independent differential input pairs: Pins 1/2 (Comp1), 5/6 (Comp2), 8/9 (Comp3), 12/13 (Comp4). |
| 3, 4, 10, 11 | Open-Collector Outputs | Uncommitted collector outputs - require external pull-up resistors; support wired-AND logic and mixed-voltage interfacing. |
| 7 | GND | Ground reference for all comparators and internal bias network - must be low-impedance connection. |
| 14 | VCC | Positive supply input - reverse-voltage protected; accepts 3–30 V DC with no polarity protection required. |
Key Features
| Feature | Design Value |
|---|---|
| Ultralow Power Consumption | 60 µA typical ICC enables >10-year battery life in always-on sensor nodes using CR2032 cells. |
| Ground-Sensing Input Stage | Common-mode range includes 0 V - permits direct comparison of signals referenced to system ground without level-shifting. |
| Bimodal Output Architecture | Switches between Darlington (30 mA @ VO ≥ 1.5 V) and ground-emitter (700 µA @ VO ≤ 0.4 V) modes for optimized drive strength vs. low-level logic compatibility. |
| CMOS/TTL Output Compatibility | Open-collector outputs interface directly with 3.3 V, 5 V, or 12 V logic families via external pull-up - no level translators needed. |
| Reverse Supply Protection | Withstands accidental VCC polarity reversal - eliminates need for series diode in field-deployed equipment. |
Applications
| Limit Detection System | Analog-to-Digital Converter |
|---|---|
Use Scenario: Monitoring battery voltage against preset thresholds to trigger low-battery alerts or shutdown sequences in portable medical devices. IC Role / Device Role / Timing Role: Quadruple comparator performing simultaneous high/low/overvoltage/undervoltage checks with independent hysteresis. Use Value: Single LP339D replaces four discrete comparators, reducing BOM count and PCB area while maintaining <5 mV threshold accuracy. |
Use Scenario: Converting analog sensor outputs (e.g., temperature, pressure) into 2-bit digital codes using flash ADC topology. IC Role / Device Role / Timing Role: Four parallel voltage comparators generating thermometer-coded outputs fed to priority encoder logic. Use Value: 1.3 µs typical response time ensures sub-1 MHz sampling rates; 60 µA quiescent current extends runtime in energy-constrained edge sensors. |
| Pulse Generator | High-Voltage Logic Interface |
Use Scenario: Generating square waves for timing reference or clock enable signals in microcontroller peripherals. IC Role / Device Role / Timing Role: Comparator configured as astable multivibrator with RC feedback network controlling oscillation frequency. Use Value: Wide 3–30 V supply range allows direct integration into 12 V automotive or 24 V industrial timing modules without LDO. |
Use Scenario: Interfacing 3.3 V microcontroller GPIOs to 24 V industrial control lines (e.g., PLC I/O, solenoid drivers). IC Role / Device Role / Timing Role: Level-shifting comparator translating logic-high/low states into 0 V / 24 V open-collector outputs. Use Value: Output pull-up to 24 V enables direct control of industrial loads; input bias current <3 nA prevents signal corruption on high-Z MCU pins. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar quadruple comparator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM339DR | Same pinout, identical electrical specs except wider temp range (−40°C to 85°C); higher max ICC (100 µA typ vs. 60 µA). | Preferred for extended-temperature industrial or automotive environments where LP339D's 0°C–70°C range is insufficient. | Select LM339DR when ambient operating temperature exceeds 70°C or long-term reliability at −40°C is required. |
| LP2901DR | Same SOIC-14 package and pinout; rated for −40°C to 85°C; identical 60 µA ICC and ±2 mV VIO, but improved input offset drift over temperature. | Suitable for precision measurement systems requiring stable threshold accuracy across wide thermal excursions. | Choose LP2901DR when design requires guaranteed performance down to −40°C with tighter input offset stability over temperature. |
Compared with LP339D, LM339DR offers broader temperature qualification at slightly higher power, while LP2901DR delivers identical low-power operation plus extended cold-temperature capability and improved offset drift - making both viable alternatives depending on thermal and precision requirements.
Availability
LP339D is available at Aetrix Electronics and suitable for battery-powered instrumentation, industrial limit detection, and analog front-end signal conditioning requiring stable component supply and long-lifecycle sourcing.
Supply support for LP339D 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 specializing in analog, embedded processing, and connectivity technologies, with decades of expertise in precision analog ICs and power-efficient signal conditioning solutions.
The LP339D belongs to TI's legacy low-power comparator family, engineered specifically for single-supply, battery-conscious applications demanding rail-to-ground input sensing and open-collector output flexibility in commercial temperature environments.
FAQ
What is the maximum supply voltage rating for the LP339D?
The LP339D has an absolute maximum supply voltage (VCC) rating of 36 V. It operates reliably across a recommended range of 3 V to 30 V, supporting direct connection to common industrial rails such as 5 V, 12 V, and 24 V without regulation. Exceeding 36 V risks permanent damage per the absolute maximum ratings table in the official TI datasheet for LP339D.
Does the LP339D support rail-to-rail input operation?
The LP339D supports common-mode input voltages from ground (0 V) to VCC − 2 V across its full operating temperature range (0°C to 70°C). While not fully rail-to-rail on the high side, its ability to accept inputs down to 0 V - including ground-referenced signals - makes it suitable for single-supply sensor interfacing without level-shifting circuitry. This behavior is confirmed in the "Recommended Operating Conditions" section of the LP339D datasheet.
Can multiple LP339D outputs be connected together?
Yes, LP339D outputs are open-collector and can be wire-OR'd (wired-AND) by connecting them to a shared pull-up resistor. This configuration enables dot-logic functions such as alarm consolidation or priority encoding. The output section is designed for this purpose, and the datasheet explicitly states that "several outputs can be tied together" - provided total sink current remains within device limits and pull-up voltage stays within the 3–36 V allowed range.
What is the typical response time of the LP339D?
The LP339D exhibits a typical large-signal response time of 1.3 µs under TTL logic swing conditions (VCC = 5 V, TA = 25°C, RL = 5.1 kΩ to 5 V). This value is measured from input transition to valid output state and reflects performance in fast threshold-detection applications like pulse shaping or simple ADC front-ends. Response time increases slightly at lower supply voltages or elevated temperatures, as noted in the switching characteristics table of the LP339D datasheet.
Is the LP339D pin-compatible with other TI quad comparators?
Yes, the LP339D is pin-for-pin compatible with the LM239, LM339, and LM2901 in the same SOIC-14 (D) package. All share identical pin assignments for inputs, outputs, VCC, and GND. However, differences exist in temperature range, input offset voltage distribution, and supply current - so while PCB layout is interchangeable, system-level validation is required when substituting LP339D for LM339 or LP2901 in designs operating outside 0°C–70°C.
LP339D Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Package/Case:
- 14-SOIC (0.154", 3.90mm Width)
- Series:
- -
- Packaging:
- Tube
- Product Status:
- Obsolete
- Type:
- General Purpose
- Number of Elements:
- 4
- Output Type:
- CMOS, MOS, Open-Collector
- Voltage - Supply, Single/Dual (±):
- 3V ~ 30V, ±1.5V ~ 15V
- :
- 5mV @ 30V
- 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:
- Surface Mount
- :
- 14-SOIC
LP339D FAQ
1.How can I place an order for LP339D through Aetrix?
Please submit a Request for Quotation (RFQ) for LP339D 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 LP339D reliable?
The price and inventory of LP339D are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LP339D is usually 5 days.
3.What payment methods are accepted for LP339D?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LP339D transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LP339D?
LP339D orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LP339D 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 LP339D?
For technical support, including LP339D datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LP339D requirements.
6.How does Aetrix verify that LP339D is sourced from the original manufacturer or authorized distributors?
All LP339D 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 LP339D meets industry standards.
7.What is the process for return or replacement of LP339D?
All LP339D units undergo pre-shipment inspection (PSI). If there is an issue with LP339D, 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 LP339D part is unused and in its original packaging.
Return procedure for LP339D:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LP339D 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
Texas Instruments
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LM339APWR
Texas Instruments
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LM2903P
Texas Instruments
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LM393ADR
Texas Instruments
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NCX2200GMAZ
NXP Semiconductors
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