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Texas Instruments LP339MX
- Part No.:
- LP339MX
- Manufacturer:
- Texas Instruments
- Category:
- Comparators
- Package:
- 14-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
LP339MX.pdf
- Description:
- IC COMPARATOR 4 GEN PUR 14SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:3,018
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Product details
Overview
LP339MX 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. It interfaces directly with CMOS logic and supports battery-powered systems, limit detection, and analog-to-digital conversion functions.
For engineers reviewing the LP339MX datasheet, LP339MX pinout, LP339MX application, or LP339MX equivalent, this page delivers verified electrical parameters, SOIC-14 package details, output sink behavior across voltage modes, compatibility with TTL/CMOS loads, and real-world timing generator and relay driver use cases.
Technical Context
The LP339MX implements four independent PNP-input comparators with a common-mode input range extending to ground on single supplies and split supplies up to ±18 V. Its bi-modal open-collector output delivers 30 mA sink at VO ≥ 1.5 V (Darlington mode) and ~700 µA at VO ≤ 0.4 V (grounded-emitter mode), enabling direct LED, relay, and buzzer drive without external transistors.
Input bias current is 3 nA (typ), offset current ±0.5 nA (typ), and large-signal response time is 1.3 µs (with 100 mV step, 5 mV overdrive). Supply current remains stable from 2 V to 30 V, and reverse supply protection prevents damage during polarity reversal.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Current | 60 µA typical - enables multi-year battery life in portable sensors and low-power monitoring circuits |
| Input Offset Voltage | ±2 mV typical - supports accurate threshold detection down to millivolt-level signals |
| Input Bias Current | 3 nA typical - minimizes loading on high-impedance sources like thermistors or photodiodes |
| Output Sink Current | 30 mA at VO = 2 V - drives LEDs, small relays, or logic inputs directly without buffer stages |
| Common-Mode Range | Includes ground on single supply - allows direct sensing of 0 V referenced signals (e.g., zero-crossing detection) |
| Response Time | 1.3 µs (100 mV step, 5 mV overdrive) - suitable for pulse shaping and basic timing circuits up to ~500 kHz |
| Operating Temperature | 0°C to +70°C - qualified for commercial-grade industrial control and consumer electronics |
Pinout & Package
LP339MX is housed in a 14-pin SOIC (Small Outline Integrated Circuit) package per NS Package Number M14A, with 3.9 mm body width, 1.27 mm lead pitch, and RoHS-compliant matte tin (Sn) lead finish. It is rated MSL Level-1 (unlimited floor life at ≤30°C/60% RH).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Comparator 1 Output | Open-collector NPN output - requires external pull-up; supports wired-OR configurations |
| 2 | Comparator 1 Inverting Input (−) | PNP differential input - accepts voltages down to −0.3 V; common-mode range includes ground |
| 3 | Comparator 1 Non-Inverting Input (+) | Same input structure as Pin 2; enables both inverting and non-inverting configurations |
| 4 | GND | Ground reference for all comparators and internal bias network |
| 5 | Comparator 2 Inverting Input (−) | Independent input for second comparator; no crosstalk with other channels |
| 6 | Comparator 2 Non-Inverting Input (+) | Paired with Pin 5 for full differential operation of Comparator 2 |
| 7 | Comparator 2 Output | Open-collector output identical in behavior to Pin 1 |
| 8 | V+ | Positive supply rail - supports 2 V to 36 V single supply or ±18 V dual supply |
| 9 | Comparator 3 Non-Inverting Input (+) | Third comparator's non-inverting input; shares same PNP input stage characteristics |
| 10 | Comparator 3 Inverting Input (−) | Third comparator's inverting input; fully independent channel |
| 11 | Comparator 3 Output | Open-collector output; electrically identical to Pins 1 and 7 |
| 12 | Comparator 4 Inverting Input (−) | Fourth comparator's inverting input; validated for ground-referenced sensing |
| 13 | Comparator 4 Non-Inverting Input (+) | Fourth comparator's non-inverting input; supports hysteresis via feedback |
| 14 | Comparator 4 Output | Final open-collector output; enables multi-channel OR'ing or independent load control |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low supply current | 60 µA typical - reduces system standby power by >90% vs. standard LM339 (2 mA) |
| Ground-sensing input | Common-mode range includes 0 V on single supply - eliminates need for level-shifting in 0–5 V sensor interfaces |
| Bi-modal output stage | Switches between Darlington (30 mA @ VO=2 V) and grounded-emitter (~700 µA @ VO=0.4 V) - supports both high-current and low-voltage logic drive |
| CMOS/TTL-compatible output | Output sinks up to 30 mA while maintaining logic-level VOH/VOL - directly interfaces with 74HC, CD4000, and microcontroller GPIO |
| Reverse supply protection | Withstands −0.3 V to −1 V reverse bias on V+ - prevents latch-up or damage during board insertion or power sequencing errors |
Applications
| Battery-Powered Threshold Detector | Industrial Relay Control Interface |
|---|---|
Use Scenario: Monitoring Li-ion cell voltage during charging/discharging to trigger cutoff at 4.2 V and 2.8 V thresholds. IC Role / Device Role / Timing Role: LP339MX acts as quad independent comparator - two channels monitor upper/lower limits, two unused channels tied to GND. Use Value: 60 µA quiescent current extends battery runtime; ground-sensing enables direct connection to battery negative terminal without level shifters. |
Use Scenario: Driving 12 V DC coil relays in PLC I/O modules using 3.3 V or 5 V logic controllers. IC Role / Device Role / Timing Role: LP339MX provides isolated, high-sink-current open-collector outputs - each channel controls one relay via 1 kΩ pull-up to 12 V. Use Value: 30 mA sink capability eliminates need for external NPN drivers; bi-modal output ensures reliable turn-on even under partial saturation conditions. |
| Audio Peak Level Indicator | Zero-Crossing Detector (Single Supply) |
Use Scenario: Three-level LED indicator showing low/medium/high audio signal amplitude in portable speakers. IC Role / Device Role / Timing Role: LP339MX compares rectified audio envelope against three fixed reference voltages using its four comparators. Use Value: Independent inputs allow simultaneous multi-threshold comparison; low input bias current avoids loading RC envelope filter networks. |
Use Scenario: Detecting AC line zero crossings in 5 V microcontroller-based dimmer circuits without transformer isolation. IC Role / Device Role / Timing Role: LP339MX compares scaled AC waveform (via resistive divider) against 0 V reference - output toggles at each crossing. Use Value: Ground-inclusive common-mode range enables direct 0 V reference; fast 1.3 µs response ensures <1° phase error at 50/60 Hz. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar quad comparator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM339DR | Higher supply current (2 mA typ), no ground-sensing on single supply, slower response (1.3 µs vs. 300 ns typical for LM339) | Not suitable for battery-critical designs; requires level-shifting for ground-referenced inputs | Select LM339DR only when legacy pinout compatibility is required and ultra-low power is not critical |
| TLV339IPWR | Lower supply current (380 nA typ), rail-to-rail input, but max supply 5.5 V and 6 mA output sink | Restricted to low-voltage systems (<5.5 V); insufficient sink for relays or LEDs without buffers | Choose TLV339IPWR for sub-µA IoT sensor nodes where supply voltage ≤5 V and load current <5 mA |
Compared with LM339DR and TLV339IPWR, the LP339MX uniquely balances ultra-low 60 µA supply current, 36 V supply tolerance, ground-sensing capability, and 30 mA output sink - making it optimal for industrial 12–24 V battery or line-powered systems requiring robust analog thresholding without added components.
Availability
LP339MX is available at Aetrix Electronics and suitable for battery-powered instrumentation, industrial relay interface modules, audio level indicators, and single-supply zero-crossing detection circuits requiring stable component supply and long-term sourcing continuity.
Supply support for LP339MX 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 acquired National Semiconductor in 2011 and maintains full technical and manufacturing continuity for legacy analog products including the LP339MX.
The LP339MX belongs to TI's precision analog comparator portfolio, engineered for low-power industrial sensing, battery-operated measurement, and robust interface solutions where supply efficiency and input flexibility outweigh speed requirements.
FAQ
What is the maximum supply voltage rating for the LP339MX?
The LP339MX supports a maximum supply voltage of 36 VDC on single supply or ±18 VDC on split supplies. Absolute maximum ratings include differential input voltage up to ±36 VDC and input voltage range from −0.3 VDC to 36 VDC. Exceeding these limits risks permanent device damage, especially if input pins go more than −0.3 V below ground.
Does the LP339MX support true ground-referenced input operation on single supply?
Yes, the LP339MX features an input common-mode voltage range that explicitly includes ground (0 V) when operated from a single supply. This allows direct connection of sensors or signals referenced to system ground without level-shifting circuitry - a key differentiator from standard comparators like the LM339.
Can multiple LP339MX outputs be wired together for logical OR functionality?
Yes, all four outputs of the LP339MX are open-collector NPN structures and can be safely wired together with a single pull-up resistor to implement wired-OR logic. This configuration is commonly used in alarm systems or fault-detection circuits where any active comparator pulls the shared line low.
What is the output behavior of the LP339MX at low output voltages (e.g., below 0.5 V)?
The LP339MX exhibits bi-modal output behavior: below ~0.8 V, it operates in grounded-emitter mode delivering ~700 µA sink current; above ~1.5 V, it switches to Darlington mode capable of 30 mA sink. This design ensures strong drive at higher VO while retaining ability to pull low-voltage logic lines near ground.
Is the LP339MX pin-compatible with the LM339 series?
Yes, the LP339MX has identical pinout and footprint to the LM339, LP339, and TLC339 families in SOIC-14 packages. This allows drop-in replacement in existing designs - though designers must verify that the lower supply current and ground-sensing capability of the LP339MX do not alter system behavior in legacy circuits.
LP339MX Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Package/Case:
- 14-SOIC (0.154", 3.90mm Width)
- Series:
- -
- Packaging:
- Tape & Reel (TR)
- 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
- 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
LP339MX FAQ
1.How can I place an order for LP339MX through Aetrix?
Please submit a Request for Quotation (RFQ) for LP339MX 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 LP339MX reliable?
The price and inventory of LP339MX are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LP339MX is usually 5 days.
3.What payment methods are accepted for LP339MX?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LP339MX transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LP339MX?
LP339MX orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LP339MX 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 LP339MX?
For technical support, including LP339MX datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LP339MX requirements.
6.How does Aetrix verify that LP339MX is sourced from the original manufacturer or authorized distributors?
All LP339MX 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 LP339MX meets industry standards.
7.What is the process for return or replacement of LP339MX?
All LP339MX units undergo pre-shipment inspection (PSI). If there is an issue with LP339MX, 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 LP339MX part is unused and in its original packaging.
Return procedure for LP339MX:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LP339MX Tags
-
LM2903DR
Texas Instruments
-
LM339DR
Texas Instruments
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LM339PWR
Texas Instruments
-
LM393DT
STMicroelectronics
-
LM2901PWR
Texas Instruments
-
LM2903DT
STMicroelectronics
-
LM393DR
Texas Instruments
-
LM239DR
Texas Instruments
-
LM339APWR
Texas Instruments
-
LM2903P
Texas Instruments
-
LM393ADR
Texas Instruments
-
NCX2200GMAZ
NXP Semiconductors
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