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Texas Instruments LM339AM/NOPB
- Part No.:
- LM339AM/NOPB
- Manufacturer:
- Texas Instruments
- Category:
- Comparators
- Package:
- 14-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
LM339AM/NOPB.pdf
- Description:
- IC COMPARATOR 4 GEN PUR 14SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:11,429
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Product details
Overview
LM339AM/NOPB from Texas Instruments is a quad open-collector voltage comparator IC designed for industrial analog-to-digital interface applications. It features ±3 mV maximum input offset voltage, 0.8 mA typical supply current per comparator, and operates from 2 V to 36 V single supply (or ±1 V to ±18 V dual supply). Its input common-mode range includes ground, enabling direct sensing of signals near 0 V in battery-powered or single-rail systems.
For engineers reviewing the LM339AM/NOPB datasheet, LM339AM/NOPB pinout, LM339AM/NOPB application, or LM339AM/NOPB equivalent, key selection considerations include its rail-to-rail input capability down to GND, TTL/CMOS-compatible open-collector outputs, low quiescent current for portable designs, and wide temperature range (0°C to 70°C) suitability for embedded control and power monitoring circuits.
Technical Context
The LM339AM/NOPB integrates four independent high-gain comparators with PNP input stages, enabling input voltages to extend to ground even under single-supply operation. Its uncommitted NPN output transistors support wired-OR logic, level-shifting up to 36 V, and sink currents up to 16 mA while maintaining ≤400 mV saturation voltage at 4 mA.
Unlike comparators with internal clamps or rail-to-rail outputs, the LM339AM/NOPB relies on external pull-up resistors and requires hysteresis for noise immunity in slow-slew applications. Its bias network delivers supply-independent current draw across 2–36 V, and differential input voltage tolerance extends beyond V+, limited only by −0.3 V minimum input clamp.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 2 V to 36 V single supply (±1 V to ±18 V dual); supports wide-input industrial rails and battery-backed systems. |
| Input Offset Voltage | ±3 mV max at 25°C; enables accurate threshold detection without trimming in precision limit-comparator applications. |
| Supply Current | 0.8 mA typical per comparator; allows four-channel comparison in ultra-low-power systems (e.g., <4 mW total at 5 V). |
| Input Bias Current | 25 nA max; minimizes loading on high-impedance sensor sources like thermistors or photodiodes. |
| Output Saturation Voltage | 250 mV at 4 mA sink; ensures reliable logic LOW to TTL/CMOS inputs when used with standard pull-ups. |
| Input Common-Mode Range | Includes GND to V+−1.5 V; permits direct interfacing with 0 V-referenced sensors without level-shifting circuitry. |
| Response Time | 300 ns for 100 mV step with 5 mV overdrive; suitable for medium-speed pulse generation and window detection. |
Pinout & Package
LM339AM/NOPB is housed in a 14-pin SOIC package (8.65 mm × 3.91 mm body size), optimized for surface-mount assembly and thermal performance (RθJA = 95°C/W).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2, 13, 14 | Open-collector outputs (OUT2, OUT1, OUT4, OUT3) | Uncommitted NPN collectors requiring external pull-up; enable wired-OR logic, level translation, or direct grounding of loads. |
| 3 | Positive supply (V+) | Primary power input for all four comparators; accepts 2–36 V DC or split supplies. |
| 4, 5, 6, 7, 8, 9, 10, 11 | Differential inputs (IN1−/IN1+, IN2−/IN2+, IN3−/IN3+, IN4−/IN4+) | Eight high-impedance PNP-based inputs supporting ground-referenced sensing and wide common-mode range. |
| 12 | Ground (GND) | Reference node for single-supply operation; also serves as emitter return for output transistors. |
Key Features
| Feature | Design Value |
|---|---|
| Quad independent comparators | Four functionally isolated channels in one SOIC-14 package reduce board space and BOM count vs discrete solutions. |
| Ground-sensing input stage | PNP input architecture allows common-mode voltage down to 0 V - critical for battery voltage monitoring and zero-crossing detection. |
| Open-collector outputs | Supports flexible logic interfacing (TTL/DTL/ECL/MOS/CMOS), bus-wiring, and voltage-level translation up to 36 V. |
| Low supply current | 0.8 mA per comparator enables always-on status monitoring in energy-constrained IoT edge nodes and portable equipment. |
| Wide supply range | Operates from 2 V (e.g., Li-ion cutoff) to 36 V (industrial 24 V systems), eliminating need for separate LDOs in multi-rail designs. |
Applications
| Overvoltage Protection Circuit | Temperature Threshold Monitor |
|---|---|
Use Scenario: Detects when a 12 V DC power rail exceeds 13.2 V to trigger shutdown via microcontroller GPIO. IC Role / Device Role / Timing Role: LM339AM/NOPB acts as a precision voltage window comparator with hysteresis, comparing rail voltage against a stable reference. Use Value: Prevents damage to downstream 12 V logic by asserting fault signal within 300 ns of overvoltage event, using only one comparator channel. | Use Scenario: Monitors NTC thermistor voltage divider in HVAC controller to activate cooling fan above 35°C. IC Role / Device Role / Timing Role: LM339AM/NOPB functions as a single-pole threshold detector, converting analog temperature signal into clean digital enable signal. Use Value: Achieves ±1°C accuracy at trip point using ±3 mV offset spec and 25 nA input bias, minimizing sensor self-heating error. |
| AC Zero-Crossing Detector | Multi-Channel Analog-to-Digital Converter |
Use Scenario: Converts 50/60 Hz AC line voltage to synchronized square wave for TRIAC phase-control dimming. IC Role / Device Role / Timing Role: LM339AM/NOPB serves as a ground-referenced comparator with AC-coupled input, detecting polarity transitions at 0 V crossing. Use Value: Input common-mode range including GND eliminates need for negative supply or level-shifter, simplifying isolation design. | Use Scenario: Implements 4-bit flash ADC in test equipment using resistor ladder and LM339AM/NOPB's four comparators in parallel. IC Role / Device Role / Timing Role: LM339AM/NOPB provides simultaneous analog voltage comparisons against binary-weighted reference taps. Use Value: 300 ns response time enables >3 MHz sampling rate; open-collector outputs drive LED indicators or FPGA inputs directly. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar quad comparator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM339DR | Same electrical specs and pinout; SOIC-14 package with different tape-and-reel packaging and RoHS compliance marking. | No functional difference; identical performance in overvoltage protection, zero-crossing, and ADC applications. | Select LM339DR for automated SMT assembly where reel packaging and TI's standard industrial grade are preferred. |
| LM2901DT | Wider operating temperature range (−40°C to +85°C); otherwise identical offset, supply current, and pinout. | Better suited for automotive cabin modules or outdoor industrial controllers requiring extended thermal margin. | Choose LM2901DT when ambient temperature exceeds 70°C or AEC-Q200 qualification is required. |
Compared with LM339DR and LM2901DT, the LM339AM/NOPB offers identical comparator performance and SOIC-14 footprint but is specified for 0°C to 70°C operation and carries TI's enhanced manufacturability markings (NOPB = lead-free, RoHS-compliant, no Pb).
Availability
LM339AM/NOPB is available at Aetrix Electronics and suitable for overvoltage protection circuits, temperature threshold monitors, and AC zero-crossing detectors requiring stable component supply across industrial OEM production runs.
Supply support for LM339AM/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 is a global semiconductor leader delivering analog and embedded processing solutions, with over 90 years of innovation in precision analog ICs and power management.
The LM339AM/NOPB belongs to TI's legacy precision comparator product line, engineered for cost-sensitive, high-reliability industrial control, power supply supervision, and sensor interface applications where ground-sensing capability and open-collector flexibility are essential.
FAQ
What is the maximum supply voltage rating for LM339AM/NOPB?
The LM339AM/NOPB has an absolute maximum supply voltage of 36 VDC for single-supply operation and ±18 VDC for dual-supply use. Exceeding these limits risks permanent damage. The recommended operating range is 2 V to 36 V, ensuring stable comparator function across industrial and battery-powered systems while maintaining specified offset and response time performance.
Does LM339AM/NOPB require external pull-up resistors on its outputs?
Yes, LM339AM/NOPB requires external pull-up resistors on all four open-collector outputs (pins 1, 2, 13, 14) to establish HIGH logic levels. Without pull-ups, outputs remain floating in the OFF state. Typical values range from 1 kΩ to 10 kΩ depending on load capacitance and speed requirements; lower values improve rise time but increase power consumption when sinking current.
Can LM339AM/NOPB operate with inputs referenced to ground in single-supply mode?
Yes, LM339AM/NOPB explicitly supports input common-mode voltage down to GND in single-supply configurations. Its PNP input stage enables direct connection of sensors or signal sources with 0 V reference, eliminating level-shifters in applications like battery voltage monitoring, zero-crossing detection, and thermistor-based temperature sensing - a key differentiator versus many rail-to-rail input comparators.
What is the typical input bias current specification for LM339AM/NOPB?
The LM339AM/NOPB has a maximum input bias current of 25 nA at 25°C. This low value minimizes loading errors on high-impedance sources such as photodiodes, capacitive sensors, or precision voltage dividers. Because the input current flows *out* of the device (due to PNP inputs), it does not vary with output state - ensuring consistent reference node behavior during dynamic switching.
Is LM339AM/NOPB pin-compatible with LM2901 or LM339 variants?
Yes, LM339AM/NOPB is fully pin-compatible with LM2901, LM339, and LM239 in SOIC-14 packages. All share identical pinout (14-pin SOIC), electrical interface, and functional block diagram. Differences lie only in temperature grade (LM339AM/NOPB: 0°C to 70°C; LM2901: −40°C to +85°C) and minor parametric tolerances - allowing direct substitution in existing PCB layouts without modification.
LM339AM/NOPB Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Package/Case:
- 14-SOIC (0.154", 3.90mm Width)
- Series:
- -
- Packaging:
- Tube
- Product Status:
- Active
- Type:
- General Purpose
- Number of Elements:
- 4
- Output Type:
- Open-Collector
- Voltage - Supply, Single/Dual (±):
- 2V ~ 36V, ±1V ~ 18V
- :
- 2mV @ 30V
- Voltage - Input Offset (Max):
- 0.25µA @ 5V
- Current - Input Bias (Max):
- 16mA @ 5V
- 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-SOIC
LM339AM/NOPB FAQ
1.How can I place an order for LM339AM/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LM339AM/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 LM339AM/NOPB reliable?
The price and inventory of LM339AM/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM339AM/NOPB is usually 5 days.
3.What payment methods are accepted for LM339AM/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM339AM/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM339AM/NOPB?
LM339AM/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM339AM/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 LM339AM/NOPB?
For technical support, including LM339AM/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM339AM/NOPB requirements.
6.How does Aetrix verify that LM339AM/NOPB is sourced from the original manufacturer or authorized distributors?
All LM339AM/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 LM339AM/NOPB meets industry standards.
7.What is the process for return or replacement of LM339AM/NOPB?
All LM339AM/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LM339AM/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 LM339AM/NOPB part is unused and in its original packaging.
Return procedure for LM339AM/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LM339AM/NOPB 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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