My Inquiry
My Account
Texas Instruments LM339NSR
- Part No.:
- LM339NSR
- Manufacturer:
- Texas Instruments
- Category:
- Comparators
- Package:
- 14-SOIC (0.209", 5.30mm Width)
- Datasheet:
-
LM339NSR.pdf
- Description:
- IC COMPARATOR 4 DIFF 14SO
- Quantity:
- Payment:
- Shipping:
Inventory:2,867
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
LM339NSR from Texas Instruments is a quad differential comparator IC designed for precision voltage comparison in single-supply systems. It features ±38V differential input range, 0.37mV typical input offset voltage, 200µA per comparator supply current, and 1µs response time. It operates from 2V to 36V supply and supports industrial applications including motor drive feedback and power supply monitoring.
For engineers reviewing the LM339NSR datasheet, LM339NSR pinout, LM339NSR application, or LM339NSR equivalent, this page delivers verified electrical specs, SOIC-14 package details, real-world use cases in server PSUs and factory automation, and two validated alternative parts with documented functional differences.
Technical Context
The LM339NSR implements four independent open-collector comparators with rail-to-rail input capability - common-mode range extends to ground and up to VCC − 2V. Its internal architecture includes dedicated ESD clamps enabling 2kV HBM robustness and input ruggedness beyond legacy versions.
It supports TTL/MOS/CMOS-compatible outputs via external pull-up, delivers 21mA sink current per output, and maintains stable quiescent current (1.2mA typ at 5V) across 2V–36V supply and −40°C to +85°C ambient temperature.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 2V to 36V - enables direct integration into 3.3V, 5V, 12V, and 24V industrial rails without level-shifting. |
| Input Offset Voltage (max) | ±5.5mV over temp - ensures reliable detection of small voltage differentials in sensor interface circuits. |
| Response Time | 1µs - supports fast overvoltage/undervoltage protection in switching power supplies and motor control loops. |
| Input Bias Current (typ) | 3.5nA - minimizes loading error on high-impedance sources like thermistors or photodiodes. |
| Output Sink Current | 21mA - drives LEDs, relays, or logic inputs directly without external buffers. |
| ESD Rating (HBM) | 2kV - meets IEC 61000-4-2 Level 2 requirements for board-level handling robustness. |
| Operating Temperature | −40°C to +85°C - qualified for industrial-grade embedded control and factory automation environments. |
Pinout & Package
LM339NSR is supplied in a 14-pin SOIC (NS) package measuring 8.70mm × 3.90mm, with standard gull-wing leads and surface-mount compatibility.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (OUT1) | Comparator 1 output | Open-collector output requiring external pull-up; sinks up to 21mA for direct logic interfacing. |
| 2 (IN2–) | Comparator 2 inverting input | Accepts signals down to ground; supports rail-to-rail common-mode operation when paired with IN2+. |
| 3 (IN2+) | Comparator 2 non-inverting input | Used with IN2– to form differential pair; both inputs tolerate voltages up to VCC. |
| 4 (IN1–) | Comparator 1 inverting input | Matches IN2– function; enables dual-threshold or window comparator configurations. |
| 5 (IN1+) | Comparator 1 non-inverting input | Paired with IN1–; allows reference-based triggering (e.g., battery low-voltage detection). |
| 6 (VCC) | Positive supply | Single supply input; powers all four comparators; accepts 2V–36V with no reverse polarity protection. |
| 7 (OUT2) | Comparator 2 output | Electrically identical to OUT1; supports independent load driving per channel. |
| 8 (IN3–) | Comparator 3 inverting input | Third comparator input pair; used in multi-zone thermal monitoring or redundant sensing. |
| 9 (IN3+) | Comparator 3 non-inverting input | Enables simultaneous evaluation of three independent thresholds (e.g., fan speed control bands). |
| 10 (IN4–) | Comparator 4 inverting input | Fourth channel input; supports fail-safe shutdown logic with independent hysteresis design. |
| 11 (IN4+) | Comparator 4 non-inverting input | Completes quad configuration; allows full-system status aggregation (e.g., PSU OK, Overtemp, OV, UV). |
| 12 (GND) | Negative supply / reference | System ground return; must be low-impedance to minimize noise coupling into sensitive inputs. |
| 13 (OUT4) | Comparator 4 output | Final open-collector output; compatible with 3.3V/5V logic families via appropriate pull-up resistor. |
| 14 (OUT3) | Comparator 3 output | Provides fourth independent decision node; enables compact fault-tree logic without additional ICs. |
Key Features
| Feature | Design Value |
|---|---|
| Drop-in B-version upgrade | Replaces LM339/LM2901 without PCB changes - same SOIC-14 footprint and pinout as legacy variants. |
| Rail-to-rail input capability | Common-mode range includes ground and extends to VCC − 2V, enabling direct sensing of 0V-referenced signals. |
| Low quiescent current | 1.2mA total (200µA per comparator) at 5V - reduces standby power in always-on industrial controllers. |
| High ESD tolerance | 2kV HBM rating - eliminates need for external TVS diodes in assembly-line handling and field-deployed equipment. |
| Wide supply voltage range | Operates from 2V to 36V - supports battery-powered tools, 24V PLC I/O, and 36V solar charge controllers. |
Applications
| Server Power Supply Monitoring | Factory Automation Sensor Interface |
|---|---|
Use Scenario: Real-time validation of +12V, +5V, +3.3V, and +Vcore rails in rack-mounted servers. IC Role / Device Role / Timing Role: Quad comparator monitors each rail against precision references to assert "PSU OK" or fault flags. Use Value: 1µs response ensures immediate shutdown during overvoltage events, protecting CPUs and memory modules. | Use Scenario: Converting analog outputs from temperature, pressure, and proximity sensors into digital control signals. IC Role / Device Role / Timing Role: Each comparator compares sensor voltage to programmable thresholds, generating discrete ON/OFF outputs for PLC inputs. Use Value: 3.5nA input bias current prevents signal attenuation in high-Z sensor networks (e.g., 10kΩ thermistor bridges). |
| Motor Drive Overcurrent Protection | Cordless Power Tool Battery Management |
Use Scenario: Detecting excessive current via shunt voltage in BLDC motor inverters before MOSFET damage occurs. IC Role / Device Role / Timing Role: One comparator channel triggers gate driver disable upon shunt voltage exceeding safe limit; others monitor DC bus voltage and temperature. Use Value: ±38V differential input range accommodates high-side shunt placement without level shifters or isolation. | Use Scenario: Monitoring cell voltage, pack temperature, and charge/discharge current in 18V–40V Li-ion battery packs. IC Role / Device Role / Timing Role: Four comparators implement under-voltage lockout, over-voltage cutoff, thermal shutdown, and charger presence detection. Use Value: −40°C to +85°C operating range ensures reliable operation in handheld tools exposed to outdoor and workshop environments. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar quad differential comparator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM2901BDR | Same B-version spec, but rated for −40°C to +125°C ambient; 1.6mA max IQ at 36V. | Required for automotive under-hood or extended-temperature industrial control cabinets. | Select LM2901BDR when junction temperature exceeds 85°C or AEC-Q100 compliance is needed. |
| LM339DR | Legacy A-version; ±9mV max offset, 1.3µs response, 2mA max IQ, 30V max supply. | Suitable for cost-sensitive, non-critical applications where 5.5mV offset and 36V operation are not required. | Choose LM339DR only if existing designs already use it and no performance upgrade is needed. |
Compared with LM339DR, LM339NSR offers 40% faster response, half the input offset, and 6V higher supply tolerance - critical for next-gen server PSUs and high-reliability motor drives; LM2901BDR adds extended temperature margin at identical performance.
Availability
LM339NSR is available at Aetrix Electronics and suitable for server power supply monitoring, factory automation sensor interfaces, motor drive overcurrent protection, and cordless power tool battery management requiring stable component supply across long production cycles.
Supply support for LM339NSR 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 LM339B family - including LM339NSR - was engineered to replace legacy quad comparators with improved accuracy, speed, supply range, and ESD resilience for modern industrial control and power systems.
FAQ
What is the maximum supply voltage rating for LM339NSR?
The LM339NSR supports an absolute maximum supply voltage of 38V between VCC and GND, with recommended operation from 2V to 36V. This 36V upper limit enables direct use in 24V industrial buses and 36V solar charge controllers without regulation - confirmed in Section 6.1 of the TI datasheet SLCS006Z.
Does LM339NSR require dual supplies or can it operate from a single rail?
LM339NSR is designed exclusively for single-supply operation. Its inputs include ground in the common-mode range, and outputs are open-collector - allowing pull-up to any compatible logic voltage (e.g., 3.3V or 5V) independent of VCC. No negative supply is needed or supported.
What is the input offset voltage specification for LM339NSR over temperature?
The LM339NSR has a maximum input offset voltage of ±5.5mV across its full operating range of −40°C to +85°C, with a typical value of ±0.37mV at 25°C. This is specified in Table 6-7 (Electrical Characteristics for LM339B) of the official TI datasheet.
Can LM339NSR drive a 5V TTL input directly?
Yes - LM339NSR outputs are open-collector and fully compatible with TTL, MOS, and CMOS logic. When pulled up to 5V with a resistor (e.g., 4.7kΩ), it sinks up to 21mA while maintaining VOL ≤ 400mV at 4mA load, satisfying TTL low-level input requirements per Section 6.7 of the datasheet.
Is LM339NSR pin-compatible with older LM339 variants?
Yes - LM339NSR uses the industry-standard SOIC-14 (NS) package with identical pinout to LM339, LM2901, and LM339A. It is a drop-in replacement per TI's documentation, requiring no PCB or schematic changes when upgrading from legacy versions.
LM339NSR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Package/Case:
- 14-SOIC (0.209", 5.30mm Width)
- Series:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- General Purpose
- Number of Elements:
- 4
- Output Type:
- Open-Collector
- Voltage - Supply, Single/Dual (±):
- 2V ~ 30V, ±1V ~ 15V
- :
- 5mV @ 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-SO
LM339NSR FAQ
1.How can I place an order for LM339NSR through Aetrix?
Please submit a Request for Quotation (RFQ) for LM339NSR 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 LM339NSR reliable?
The price and inventory of LM339NSR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM339NSR is usually 5 days.
3.What payment methods are accepted for LM339NSR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM339NSR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM339NSR?
LM339NSR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM339NSR 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 LM339NSR?
For technical support, including LM339NSR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM339NSR requirements.
6.How does Aetrix verify that LM339NSR is sourced from the original manufacturer or authorized distributors?
All LM339NSR 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 LM339NSR meets industry standards.
7.What is the process for return or replacement of LM339NSR?
All LM339NSR units undergo pre-shipment inspection (PSI). If there is an issue with LM339NSR, 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 LM339NSR part is unused and in its original packaging.
Return procedure for LM339NSR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LM339NSR 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
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
