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Texas Instruments LM319N/NOPB
- Part No.:
- LM319N/NOPB
- Manufacturer:
- Texas Instruments
- Category:
- Comparators
- Package:
- 14-DIP (0.300", 7.62mm)
- Datasheet:
-
LM319N/NOPB.pdf
- Description:
- IC COMPARATOR 2 GEN PUR 14DIP
- Quantity:
- Payment:
- Shipping:
Inventory:240
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Product details
Overview
LM319N/NOPB from Texas Instruments is a high-speed dual comparator IC designed for precision threshold detection in industrial and instrumentation systems. It operates from single 5-V or dual ±15-V supplies, delivers 80-ns typical response time, supports ±13-V input common-mode range, and drives TTL/RTL/DTL loads up to 25 mA per output - enabling direct relay and lamp control without external buffers.
For engineers reviewing the LM319N/NOPB datasheet, LM319N/NOPB pinout, LM319N/NOPB application, or LM319N/NOPB equivalent, this page provides verified technical context, validated pin functions, real-world use cases, and confirmed alternative options for voltage-comparator-based signal conditioning, window detection, and digital interface translation.
Technical Context
The LM319N/NOPB integrates two independent comparators on a monolithic bipolar process, each featuring uncommitted NPN open-collector outputs compatible with multiple logic families and discrete loads. Its architecture supports rail-to-rail input operation within ±13 V at ±15-V supply and maintains stable performance across 0°C to +70°C ambient temperature.
It uses high-gain differential input stages with low input bias current (≤500 nA) and tight offset voltage control (≤8 mV max), enabling accurate level sensing in noisy environments. The device's high slew rate and fast propagation delay are optimized for applications requiring sub-100-ns decision latency under 5-mV overdrive conditions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Response Time | 80 ns typical at ±15 V supply with 100-mV input step and 5-mV overdrive - enables high-frequency threshold detection in pulse-width modulation or zero-crossing circuits. |
| Input Offset Voltage | 8 mV maximum at 25°C - defines worst-case DC error band when comparing near-equal analog signals. |
| Input Bias Current | 500 nA maximum at 25°C - minimizes loading error on high-impedance sensor sources like thermistors or photodiodes. |
| Output Sink Current | 25 mA per channel - allows direct driving of relays, LEDs, or TTL inputs without external transistors. |
| Supply Voltage Range | Single 5 V or dual ±15 V - supports compatibility with both logic-level and legacy analog power domains. |
| Input Common-Mode Range | ±13 V at ±15 V supply - permits operation with inputs referenced to system ground or floating references. |
| Operating Temperature | 0°C to +70°C - qualified for commercial-grade embedded control and test equipment applications. |
Pinout & Package
LM319N/NOPB is housed in a 14-pin plastic dual in-line package (PDIP-N), 19.56 mm × 6.67 mm body size, with through-hole mounting and RoHS-compliant NiPdAu lead finish.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Comparator 1 Output | Open-collector NPN output; requires external pull-up to define logic-high level and sink up to 25 mA. |
| 2 | Comparator 1 Ground | Dedicated ground reference for first comparator stage; isolates noise coupling between channels. |
| 3 | Comparator 1 Non-Inverting Input | High-impedance input accepting signals up to ±13 V common-mode range relative to supply rails. |
| 4 | Comparator 1 Inverting Input | Matches Pin 3 in impedance and voltage range; used with Pin 3 to configure hysteresis or reference thresholds. |
| 5 | Negative Supply Voltage | Accepts −15 V minimum; sets lower rail for dual-supply operation and defines input/output swing limits. |
| 6 | Comparator 2 Output | Independent open-collector output identical in function and drive capability to Pin 1. |
| 7 | Comparator 2 Ground | Separate ground return for second comparator; enhances channel-to-channel isolation in mixed-signal layouts. |
| 8 | Comparator 2 Non-Inverting Input | Electrically matched to Pin 3; enables simultaneous dual-threshold evaluation (e.g., window detection). |
| 9 | Comparator 2 Inverting Input | Paired with Pin 8; supports differential or single-ended configurations per channel. |
| 10 | Positive Supply Voltage | Accepts +5 V to +15 V; powers both comparators and defines upper rail for output saturation and input range. |
| 11–14 | No Connect | Internally unused; must remain unconnected to avoid parasitic coupling or latch-up risk. |
Key Features
| Feature | Design Value |
|---|---|
| Two Independent Comparators | Enables concurrent evaluation of separate analog signals - e.g., overvoltage and undervoltage detection in power supplies. |
| Open-Collector Outputs | Supports wired-OR logic, level translation across voltage domains, and direct interfacing to relays, lamps, or TTL/DTL/RTL loads. |
| Wide Supply Range | Operates from single 5-V logic supply or dual ±15-V analog rails - simplifies design in mixed-signal systems without dedicated bias generators. |
| Low Input Current | Maximum 500 nA bias current minimizes error in high-source-impedance applications such as precision sensor interfaces. |
| Fast Response Time | 80-ns typical propagation delay ensures reliable timing-critical decisions in motor control commutation or pulse-edge detection. |
Applications
| Power Supply Monitoring | Relay Control Interface |
|---|---|
|
Use Scenario: Detecting overvoltage and undervoltage conditions in a 12-V DC power rail using resistor-divider references. IC Role / Device Role / Timing Role: Dual comparator implements window detection by comparing rail voltage against upper and lower thresholds simultaneously. Use Value: Eliminates need for microcontroller ADC polling; provides immediate hardware-level fault signaling with <80 ns latency. |
Use Scenario: Driving a 12-V electromagnetic relay from a 3.3-V microcontroller GPIO via optocoupler-isolated input. IC Role / Device Role / Timing Role: LM319N/NOPB acts as level-shifting buffer and current amplifier, converting logic-level signals into 25-mA sink capability. Use Value: Enables direct relay actuation without discrete transistor stages, reducing BOM count and PCB area. |
| Window Detector Circuit | Zero-Crossing Detection |
|
Use Scenario: Validating that an AC line voltage remains within ±5% tolerance during grid synchronization in inverters. IC Role / Device Role / Timing Role: One comparator monitors upper limit, the other lower limit; outputs feed NAND gate to generate enable/disable flag. Use Value: Provides deterministic pass/fail output with no software dependency - critical for safety-critical grid-tie functions. |
Use Scenario: Converting sinusoidal AC waveform into clean square wave for phase-angle control in dimmer circuits. IC Role / Device Role / Timing Role: Comparator compares AC input against 0-V reference; fast 80-ns response preserves edge fidelity at 50/60 Hz. Use Value: Delivers jitter-free timing edges essential for TRIAC triggering, avoiding misfire or inconsistent dimming. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual comparator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM393DR | Lower supply current (0.8 mA vs. 12.5 mA), slower response (1.3 µs), rail-to-rail input, SOIC-8 package. | Better suited for battery-powered sensors; unsuitable for high-speed or high-current relay drive. | Select LM393DR only when power efficiency and small footprint outweigh speed and drive strength requirements. |
| TL331IDBVR | Single comparator, 1.4 µs response, 60-µA supply current, SOT-23-5 package, rail-to-rail output. | Requires two units for dual functionality; lacks dedicated ground pins per channel and open-collector flexibility. | Choose TL331IDBVR for space-constrained designs where dual-channel integration is not mandatory. |
Compared with LM319N/NOPB, LM393DR trades speed and output drive for ultra-low power and compact packaging, while TL331IDBVR sacrifices channel integration and robust output architecture for minimal board area - making LM319N/NOPB uniquely suitable for industrial relay interfaces requiring speed, isolation, and load-driving capability.
Availability
LM319N/NOPB is available at Aetrix Electronics and suitable for industrial control panels, test equipment, power supply supervision, and relay interface modules requiring stable component supply across extended production lifecycles.
Supply support for LM319N/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 specializing in analog and embedded processing technologies, with decades of expertise in precision signal chain components.
The LM319N/NOPB belongs to TI's legacy high-speed comparator family, engineered specifically for industrial and instrumentation applications demanding fast, robust, and flexible analog decision-making at the board level.
FAQ
What is the maximum operating supply voltage for LM319N/NOPB?
The LM319N/NOPB supports total supply voltage up to 36 V, with absolute maximum ratings specifying ±15 V dual supply or single 5-V operation. Exceeding ±15 V risks permanent damage; operation above 16 V between ground and either supply rail violates recommended conditions per TI's datasheet SNOSBJ2B.
Can LM319N/NOPB drive a 12-V relay directly?
Yes, LM319N/NOPB can drive a 12-V relay directly: each open-collector output sinks up to 25 mA at saturation voltage ≤1.5 V when VIN ≤ −10 mV, enabling full activation of standard 12-V, 20-mA coil relays with appropriate pull-up to 12 V. No external transistor is required.
Does LM319N/NOPB support single-supply operation?
Yes, LM319N/NOPB is fully specified for single 5-V operation with ground reference. Input common-mode range extends from 1 V to 3 V under this condition, and output saturation voltage remains ≤0.4 V at 3.2-mA sink current - making it viable for logic-level interfacing in modern embedded systems.
What is the input offset voltage specification for LM319N/NOPB?
The LM319N/NOPB has a maximum input offset voltage of 8 mV at 25°C, as specified in Section 5.5 of the TI datasheet SNOSBJ2B. This value defines the worst-case DC error when forcing the output within 1 V of either supply rail with a 1-mA load, accounting for gain and impedance effects.
Is LM319N/NOPB pin-compatible with LM339?
No, LM319N/NOPB is not pin-compatible with LM339. LM319N/NOPB uses a 14-pin PDIP with dedicated ground pins per comparator (Pins 2 and 7) and dual supply rails (Pins 5 and 10), whereas LM339 is a quad comparator in 14-pin PDIP with shared ground (Pin 12) and single positive supply (Pin 3). Their pinouts and internal architectures differ fundamentally.
LM319N/NOPB Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Package/Case:
- 14-DIP (0.300", 7.62mm)
- Series:
- -
- Packaging:
- Tube
- Product Status:
- Active
- Type:
- General Purpose
- Number of Elements:
- 2
- Output Type:
- DTL, Open-Collector, Open-Emitter, RTL, TTL
- Voltage - Supply, Single/Dual (±):
- 5V ~ 36V, ±2.5V ~ 18V
- :
- 8mV @ ±15V
- Voltage - Input Offset (Max):
- 1µA @ ±15V
- Current - Input Bias (Max):
- -
- Current - Output (Typ):
- 12.5mA
- Current - Quiescent (Max):
- -
- CMRR, PSRR (Typ):
- -
- Propagation Delay (Max):
- -
- Hysteresis:
- 0°C ~ 70°C
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- Through Hole
- :
- 14-PDIP
LM319N/NOPB FAQ
1.How can I place an order for LM319N/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LM319N/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 LM319N/NOPB reliable?
The price and inventory of LM319N/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM319N/NOPB is usually 5 days.
3.What payment methods are accepted for LM319N/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM319N/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM319N/NOPB?
LM319N/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM319N/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 LM319N/NOPB?
For technical support, including LM319N/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM319N/NOPB requirements.
6.How does Aetrix verify that LM319N/NOPB is sourced from the original manufacturer or authorized distributors?
All LM319N/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 LM319N/NOPB meets industry standards.
7.What is the process for return or replacement of LM319N/NOPB?
All LM319N/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LM319N/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 LM319N/NOPB part is unused and in its original packaging.
Return procedure for LM319N/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LM319N/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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