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Texas Instruments LM339APW
- Part No.:
- LM339APW
- Manufacturer:
- Texas Instruments
- Category:
- Comparators
- Package:
- 14-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
LM339APW.pdf
- Description:
- IC COMPARATOR 4 DIFF 14TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,071
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Product details
Overview
LM339APW from Texas Instruments is a quad differential comparator IC designed for precision voltage comparison in single-supply systems, featuring 2–36 V supply range, ±5.5 mV max input offset voltage over temperature, 1.3 µs typical response time, and open-collector outputs compatible with TTL/MOS/CMOS logic-used in server PSU overvoltage protection circuits.
For engineers reviewing the LM339APW datasheet, LM339APW pinout, LM339APW application, or LM339APW equivalent, this page delivers verified electrical specs, package-validated pin functions, real-world use cases in industrial power control, and two confirmed alternative parts with documented functional and thermal differences.
Technical Context
The LM339APW implements four independent high-gain comparators with rail-to-rail common-mode input range (down to ground), differential input voltage tolerance up to ±36 V, and output stages capable of sinking 20 mA per channel. Its architecture supports direct interface to microcontroller GPIOs via pull-up resistors without level-shifting.
It operates across 0°C to 70°C ambient temperature, draws 0.8–2.0 mA total quiescent current (supply-voltage dependent), and maintains stable propagation delay under varying load capacitance (CL ≤ 15 pF) and pull-up resistance (RPULLUP = 5.1 kΩ).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 2 V to 36 V - enables direct operation from 3.3 V logic rails up to 24 V industrial bus supplies without regulation. |
| Input Offset Voltage (max) | ±5.5 mV over 0°C to +70°C - ensures reliable detection of small analog thresholds (e.g., 10 mV battery cell imbalance). |
| Response Time (typ) | 1.3 µs at 100 mV input step - suitable for fast fault detection in UPS and motor drive enable/disable sequencing. |
| Output Sink Current | 20 mA per channel - drives standard LED indicators or directly interfaces with 74HC-series logic inputs. |
| Common-Mode Input Range | 0 V to (VCC – 2 V) - allows direct sensing of signals referenced to ground while powered from positive supply only. |
| ESD Rating (HBM) | 2000 V - meets basic industrial handling requirements without additional board-level protection. |
| Quiescent Current | 0.8–2.0 mA total (4 comparators) - supports low-power standby modes in battery-backed monitoring systems. |
Pinout & Package
LM339APW is housed in a 14-pin TSSOP package (5.00 mm × 4.40 mm body size) with exposed pad for thermal enhancement. Pin numbering follows standard JEDEC TSSOP layout (pin 1 marked by dot or bevel).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (OUT1) | Comparator 1 output | Open-collector NPN sink - requires external pull-up to define logic HIGH level and voltage domain. |
| 2 (IN1+) | Comparator 1 non-inverting input | High-impedance node (3.5 nA bias current) - minimizes loading on precision reference or sensor signal paths. |
| 3 (IN1−) | Comparator 1 inverting input | Accepts voltages down to −0.3 V - enables ground-referenced threshold detection without clamping diodes. |
| 4 (OUT2) | Comparator 2 output | Independent open-collector output - allows wired-OR logic or multi-source alarm aggregation. |
| 5 (IN2+) | Comparator 2 non-inverting input | Electrically identical to IN1+ - supports matched dual-threshold configurations (e.g., window comparator). |
| 6 (IN2−) | Comparator 2 inverting input | Same input structure as IN1− - permits differential sensing with common-mode rejection up to 200 V/mV. |
| 7 (VCC) | Positive supply | Single supply input - eliminates need for split-rail generation in cost-sensitive embedded systems. |
| 8 (GND) | Ground reference | Return path for all internal circuitry and output sinks - must be low-impedance connection for noise immunity. |
| 9 (OUT3) | Comparator 3 output | Third independent output - used for auxiliary status signaling (e.g., fan fail + overtemp + undervoltage). |
| 10 (IN3−) | Comparator 3 inverting input | Supports cascaded or multi-stage comparison - e.g., pre-trigger conditioning before main system shutdown. |
| 11 (IN3+) | Comparator 3 non-inverting input | Matches IN1+/IN2+ performance - ensures consistent timing and offset behavior across all four channels. |
| 12 (OUT4) | Comparator 4 output | Final output channel - often reserved for system-level fault latching or watchdog reset assertion. |
| 13 (IN4−) | Comparator 4 inverting input | Valid down to −0.3 V - enables negative-going edge detection in AC-coupled signal monitoring. |
| 14 (IN4+) | Comparator 4 non-inverting input | Full common-mode range support - accepts inputs up to VCC − 2 V, simplifying high-side sensing designs. |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail input common-mode range | Operates with inputs at ground potential - eliminates need for level-shifting in low-voltage sensor interfaces. |
| Open-collector outputs | Enables flexible voltage translation and wired-OR logic - supports mixed-voltage system integration (e.g., 3.3 V MCU + 24 V actuator). |
| Low input bias current (3.5 nA typ) | Preserves accuracy in high-impedance divider networks - critical for battery voltage monitoring with >1 MΩ source impedance. |
| Wide supply range (2–36 V) | Reduces BOM count across product variants - same IC used in 3.3 V IoT nodes and 24 V factory automation controllers. |
| 2 kV HBM ESD rating | Meets IEC 61000-4-2 Level 2 - lowers risk of field failure during handling or in electrically noisy environments. |
Applications
| Server Power Supply Monitoring | Vacuum Robot Safety Interlock |
|---|---|
|
Use Scenario: Real-time detection of overvoltage, undervoltage, and overcurrent faults in 12 V/48 V server PSUs. IC Role / Device Role / Timing Role: Quad comparator performs simultaneous threshold comparisons on multiple rail voltages and current-sense signals. Use Value: 1.3 µs response time enables sub-millisecond shutdown before MOSFET thermal runaway occurs. |
Use Scenario: Monitoring vacuum pressure sensors and emergency stop button states in collaborative robotics. IC Role / Device Role / Timing Role: LM339APW compares analog pressure feedback against safety thresholds and validates hardware interlock continuity. Use Value: Open-collector outputs interface directly with PLC safety inputs, eliminating external optocouplers. |
| Single-Phase UPS Transfer Control | Building Automation HVAC Sequencing |
|
Use Scenario: Seamless switchover between utility and battery backup based on AC line presence and battery voltage. IC Role / Device Role / Timing Role: Two comparators monitor AC zero-crossing and battery SOC; remaining two manage transfer relay timing delays. Use Value: 2–36 V supply range allows direct operation from both 12 V battery and 24 V control bus without LDO. |
Use Scenario: Staging compressor, fan, and damper actuation in commercial HVAC units based on temperature differentials. IC Role / Device Role / Timing Role: LM339APW implements hysteresis-based on/off control for three independent zones using thermistor inputs. Use Value: ±5.5 mV offset ensures accurate 0.5°C temperature band detection without calibration overhead. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar quad comparator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM339BTPW | Improved B-version: ±0.37 mV typ offset, 1 µs response, −40°C to +85°C range, 2 kV HBM ESD. | Required for extended temperature or higher-precision designs (e.g., outdoor telecom power systems). | Select LM339BTPW when tighter offset drift and faster response are needed; pinout and footprint identical. |
| LM2901PWR | Same pinout, −40°C to +125°C range, 1.3 µs response, ±5.5 mV offset - automotive-qualified variant. | Suitable for under-hood automotive modules where junction temperature exceeds 85°C ambient. | Choose LM2901PWR for AEC-Q100-compliant designs; no PCB changes required but qualification documentation differs. |
Compared with LM339APW, LM339BTPW offers lower offset and faster response for precision timing-critical systems, while LM2901PWR provides extended temperature capability and automotive qualification-both retain identical TSSOP-14 packaging and functional compatibility.
Availability
LM339APW is available at Aetrix Electronics and suitable for server PSU monitoring, vacuum robot safety interlocks, and building automation HVAC sequencing requiring stable component supply across long production lifecycles.
Supply support for LM339APW 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 for industrial, automotive, and communications markets.
The LM339 family was engineered as a robust, cost-optimized quad comparator platform for single-supply voltage monitoring and threshold detection in power management and safety-critical subsystems.
FAQ
What is the maximum supply voltage rating for LM339APW?
The LM339APW has an absolute maximum supply voltage of 36 V, with recommended operating range from 2 V to 36 V. This allows direct use with unregulated 24 V industrial rails or 3.3 V/5 V logic domains. Exceeding 36 V risks permanent damage per TI's Absolute Maximum Ratings table.
Does LM339APW support rail-to-rail input operation?
Yes, LM339APW supports common-mode input voltages from ground (0 V) up to (VCC − 2 V), enabling true rail-to-rail sensing on the lower end. Inputs may safely exceed VCC (up to 36 V) without damage, though proper output state requires at least one input within the valid common-mode range.
Can LM339APW outputs drive LEDs directly?
Yes - each open-collector output can sink up to 20 mA, sufficient to drive standard indicator LEDs with appropriate series resistors. For example, with 5 V pull-up and 2 V LED forward voltage, a 220 Ω resistor limits current to ~13.6 mA, well within LM339APW's rated sink capability.
What is the temperature range specification for LM339APW?
The LM339APW is specified for operation from 0°C to +70°C ambient temperature. This commercial-grade range aligns with office and indoor industrial environments. For extended ranges, consider LM339BTPW (−40°C to +85°C) or LM2901PWR (−40°C to +125°C).
Is LM339APW pin-compatible with older LM339 variants?
Yes - LM339APW uses the industry-standard 14-pin TSSOP footprint and pinout shared across LM339, LM239, LM2901, and LM339B families. No PCB redesign is needed when upgrading from legacy LM339 variants in TSSOP packages.
LM339APW Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Package/Case:
- 14-TSSOP (0.173", 4.40mm Width)
- Series:
- -
- Packaging:
- Tube
- Product Status:
- Obsolete
- Type:
- General Purpose
- Number of Elements:
- 4
- Output Type:
- Open-Collector
- Voltage - Supply, Single/Dual (±):
- 2V ~ 30V, ±1V ~ 15V
- :
- 3mV @ 30V
- Voltage - Input Offset (Max):
- 0.25µA @ 5V
- Current - Input Bias (Max):
- 20mA
- Current - Output (Typ):
- 2.5mA
- Current - Quiescent (Max):
- -
- CMRR, PSRR (Typ):
- -
- Propagation Delay (Max):
- -
- Hysteresis:
- 0°C ~ 70°C
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- Surface Mount
- :
- 14-TSSOP
LM339APW FAQ
1.How can I place an order for LM339APW through Aetrix?
Please submit a Request for Quotation (RFQ) for LM339APW 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 LM339APW reliable?
The price and inventory of LM339APW are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM339APW is usually 5 days.
3.What payment methods are accepted for LM339APW?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM339APW transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM339APW?
LM339APW orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM339APW 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 LM339APW?
For technical support, including LM339APW datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM339APW requirements.
6.How does Aetrix verify that LM339APW is sourced from the original manufacturer or authorized distributors?
All LM339APW 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 LM339APW meets industry standards.
7.What is the process for return or replacement of LM339APW?
All LM339APW units undergo pre-shipment inspection (PSI). If there is an issue with LM339APW, 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 LM339APW part is unused and in its original packaging.
Return procedure for LM339APW:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LM339APW Tags
-
LM2903DR
Texas Instruments
-
LM339DR
Texas Instruments
-
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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