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Texas Instruments LM319AM/NOPB
- Part No.:
- LM319AM/NOPB
- Manufacturer:
- Texas Instruments
- Category:
- Comparators
- Package:
- 14-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
LM319AM/NOPB.pdf
- Description:
- IC COMPARATOR 2 GEN PUR 14SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:10,364
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Product details
Overview
LM319AM/NOPB from Texas Instruments is a high-speed dual comparator IC designed for precision threshold detection in industrial control and power management systems. It operates from single 5-V or dual ±15-V supplies, delivers 80-ns response time at ±15 V, supports up to 25 mA output sink per channel, and features uncommitted open-collector outputs compatible with TTL/DTL/RTL logic families.
For engineers reviewing the LM319AM/NOPB datasheet, LM319AM/NOPB pinout, LM319AM/NOPB application, or LM319AM/NOPB equivalent, this page provides verified specifications, SOIC-14 package details, real-world relay driver and window detector use cases, and validated alternative comparators for supply-voltage-flexible, sub-100-ns timing-critical designs.
Technical Context
The LM319AM/NOPB implements two independent voltage comparators on a single monolithic die, each with high common-mode slew rate and input isolation from system ground. Its uncommitted NPN output stage enables direct interfacing with relays, lamps, and logic families without external pull-up resistors.
It is specified for 0°C to +70°C operation and optimized for digital logic supply compatibility-supporting single 5-V operation while maintaining full performance up to ±15-V supplies. The LM319A variant (as denoted by "A" in LM319AM/NOPB) guarantees tighter offset voltage (max 2 mV), lower offset current (max 80 nA), and higher voltage gain (min 20 V/mV) versus standard LM319.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Response Time | 80 ns at ±15 V supply - enables reliable detection of fast-rising edges in motor commutation or overvoltage fault circuits. |
| Input Offset Voltage | Max 2 mV (LM319A grade) - ensures accurate threshold setting in precision level-shift or battery-monitoring applications. |
| Output Sink Current | 25 mA per channel - directly drives electromechanical relays or LED indicators without external buffer transistors. |
| Supply Voltage Range | Single 5 V or dual ±15 V - simplifies integration into mixed-signal systems using logic-level and analog rails. |
| Input Bias Current | Max 500 nA - minimizes loading error when used with high-impedance sensor dividers (e.g., thermistor or photodiode networks). |
| Common-Mode Input Range | ±13 V at ±15 V supply - supports rail-to-rail sensing across wide dynamic ranges without clamping diodes. |
| Output Configuration | Open-collector NPN - allows wired-OR logic, level translation, and flexible pull-up to any voltage ≤35 V. |
Pinout & Package
LM319AM/NOPB uses a 14-pin SOIC (D) package with 1.27 mm pitch, 8.75 mm × 3.91 mm body size, and 1.75 mm max height. Pin 1 is marked via notch or bevel; device is RoHS-compliant with Sn (matte tin) lead finish and MSL Level-1 rating.
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Output 1 | Open-collector NPN output for comparator 1 - requires external pull-up for logic-high assertion. |
| 2 | GND 1 | Ground reference for comparator 1 inputs and output stage - separate from GND 2 to support isolated signal domains. |
| 3 | Input 1+ | Non-inverting input of comparator 1 - accepts signals up to ±13 V common-mode range at ±15 V supply. |
| 4 | Input 1− | Inverting input of comparator 1 - differential input voltage limited to ±5 V maximum. |
| 5 | V− | Negative supply rail - connects to ground in single-supply mode or to negative rail in dual-supply configuration. |
| 6 | Output 2 | Open-collector NPN output for comparator 2 - independently configurable, supports wired-OR with Output 1. |
| 7 | GND 2 | Ground reference for comparator 2 - electrically isolated from GND 1 to reduce crosstalk in multi-channel sensing. |
| 8 | Input 2+ | Non-inverting input of comparator 2 - identical electrical specs to Input 1+, enabling matched dual-threshold detection. |
| 9 | Input 2− | Inverting input of comparator 2 - supports differential or single-ended configurations with same voltage limits as Input 1−. |
| 10 | V+ | Positive supply rail - accepts 4.5 V to 15 V in single-supply mode; must not exceed 16 V above ground. |
| 11–14 | NC | No-connect pins - left unconnected per TI specification; no internal bonding or function. |
Key Features
| Feature | Design Value |
|---|---|
| High-Speed Dual Comparison | 80-ns propagation delay enables real-time fault detection in switching power supplies and motor controllers. |
| Logic-Supply Compatibility | Operates from 5-V single supply - eliminates need for dedicated analog rails in microcontroller-based systems. |
| Isolated Ground Inputs | Dual independent ground pins (GND 1, GND 2) reduce inter-channel coupling in noisy industrial environments. |
| Robust Output Drive | 25-mA sink capability per output - directly interfaces with 5-V relays, optocouplers, or discrete logic gates. |
| Wide Common-Mode Range | ±13 V at ±15 V supply - supports direct sensing of high-side bus voltages without attenuator networks. |
Applications
| Relay Driver Circuit | Window Comparator |
|---|---|
|
Use Scenario: Driving 5-V SPDT relay coils in PLC I/O modules where fast response to overcurrent or overtemperature events is required. IC Role / Device Role: Dual comparator configured as hysteresis-free threshold detector - one channel monitors upper limit, the other lower limit. Use Value: 80-ns response ensures relay de-energization within 100 ns of fault onset, meeting SIL-2 functional safety timing constraints. |
Use Scenario: Battery voltage monitoring in portable medical devices, detecting under-voltage (UVLO) and over-voltage (OVLO) conditions simultaneously. IC Role / Device Role: Precision dual comparator implementing window detection with LM319AM/NOPB's 2-mV max offset ensuring ±10-mV threshold accuracy. Use Value: Eliminates need for external op-amps or ADC-based monitoring, reducing BOM count and power consumption in battery-powered systems. |
| DC Motor Commutation | Power Supply Sequencing |
|
Use Scenario: Zero-crossing detection for brushless DC motor hall-effect sensor signal conditioning in HVAC blower control. IC Role / Device Role: High-slew-rate comparator converting analog hall sensor outputs into clean digital commutation signals. Use Value: 80-ns delay and ±13 V common-mode range allow direct interface with 12-V motor phase voltages without level-shifting circuitry. |
Use Scenario: Validating correct power-up order of 3.3-V, 5-V, and 12-V rails in FPGA-based embedded systems before releasing reset. IC Role / Device Role: Dual comparator monitoring each rail against precision reference voltages to generate enable/disable strobes. Use Value: Open-collector outputs permit wired-AND logic for multi-rail sequencing, avoiding additional gate ICs or CPLD resources. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual high-speed comparator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM393DR | Slower 1.3-μs response, lower supply current (0.8 mA), no dual ground pins, SOIC-8 package. | Better suited for low-power, non-critical timing applications like battery charge status indication. | Select LM393DR only when speed <100 ns is unnecessary and board space is constrained. |
| TL331IDBVR | Single comparator, 200-ns response, rail-to-rail input, SOT-23-5 package, 60-μA quiescent current. | Requires two units for dual functionality; ideal for space-constrained, ultra-low-power sensor wake-up circuits. | Choose TL331IDBVR when designing compact, battery-operated edge nodes needing minimal standby current. |
Compared with LM319AM/NOPB, LM393DR trades speed for lower cost and power, while TL331IDBVR offers miniaturization and rail-to-rail operation at the expense of dual-channel integration and sub-100-ns timing fidelity.
Availability
LM319AM/NOPB is available at Aetrix Electronics and suitable for industrial control, power supply monitoring, and motor drive applications requiring stable component supply, long-term manufacturability, and guaranteed RoHS compliance.
Supply support for LM319AM/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 analog IC design and high-reliability manufacturing.
The LM319 series was developed for high-speed, wide-supply-voltage comparator applications in industrial automation and power electronics, emphasizing robustness, logic compatibility, and dual-channel integration in minimal footprint packages.
FAQ
What is the maximum operating supply voltage for LM319AM/NOPB?
The LM319AM/NOPB supports total supply voltage up to 36 V, with absolute maximum ratings of ±15 V for dual supplies or 5 V to 15 V for single positive supply. Operation above 16 V between ground and V+ is prohibited per TI's datasheet guidance. The LM319AM/NOPB must never be subjected to more than 16 V from ground to either supply rail to ensure reliability and avoid permanent damage.
Does LM319AM/NOPB support single-supply operation?
Yes, LM319AM/NOPB is fully specified for single 5-V operation, with input common-mode range extending from 1 V to 3 V and output saturation voltage as low as 0.3 V at 3.2 mA sink. This makes LM319AM/NOPB suitable for direct interface with 3.3-V or 5-V microcontrollers without level-shifting circuitry.
What is the meaning of the "A" suffix in LM319AM/NOPB?
The "A" in LM319AM/NOPB denotes the improved LM319A variant, which guarantees tighter electrical tolerances: maximum input offset voltage of 2 mV (vs. 10 mV for LM319), max input offset current of 80 nA (vs. 300 nA), and minimum voltage gain of 20 V/mV (vs. 8 V/mV). These enhancements make LM319AM/NOPB appropriate for precision threshold detection where accuracy is critical.
Can LM319AM/NOPB drive a relay directly?
Yes, LM319AM/NOPB can directly drive standard 5-V SPDT relays with coil resistance ≥200 Ω, as its output sinks up to 25 mA per channel with saturation voltage ≤1.5 V at that load. For reliable operation, a flyback diode must be placed across the relay coil, and the pull-up resistor should be sized to limit current to ≤25 mA - typically 220 Ω to 5 V or 470 Ω to 12 V. LM319AM/NOPB's open-collector architecture enables this direct drive without external transistors.
What package type does LM319AM/NOPB use?
LM319AM/NOPB uses a 14-pin SOIC (Small Outline Integrated Circuit) package designated as "D" by Texas Instruments, with 1.27 mm lead pitch, 8.75 mm × 3.91 mm body dimensions, and 1.75 mm maximum height. It is RoHS-compliant with matte tin (Sn) lead finish and qualifies for MSL Level-1 handling - meaning it may be assembled without baking or dry-pack requirements.
LM319AM/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:
- 2
- Output Type:
- DTL, Open-Collector, Open-Emitter, RTL, TTL
- Voltage - Supply, Single/Dual (±):
- 5V ~ 36V, ±2.5V ~ 18V
- :
- 1mV @ ±15V
- Voltage - Input Offset (Max):
- 0.5µA @ ±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:
- Surface Mount
- :
- 14-SOIC
LM319AM/NOPB FAQ
1.How can I place an order for LM319AM/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LM319AM/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 LM319AM/NOPB reliable?
The price and inventory of LM319AM/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM319AM/NOPB is usually 5 days.
3.What payment methods are accepted for LM319AM/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM319AM/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM319AM/NOPB?
LM319AM/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM319AM/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 LM319AM/NOPB?
For technical support, including LM319AM/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM319AM/NOPB requirements.
6.How does Aetrix verify that LM319AM/NOPB is sourced from the original manufacturer or authorized distributors?
All LM319AM/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 LM319AM/NOPB meets industry standards.
7.What is the process for return or replacement of LM319AM/NOPB?
All LM319AM/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LM319AM/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 LM319AM/NOPB part is unused and in its original packaging.
Return procedure for LM319AM/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LM319AM/NOPB Tags
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