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Texas Instruments LM319AMX/NOPB
- Part No.:
- LM319AMX/NOPB
- Manufacturer:
- Texas Instruments
- Category:
- Comparators
- Package:
- 14-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
LM319AMX/NOPB.pdf
- Description:
- IC COMPARATOR 2 GEN PUR 14SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:3,155
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Product details
Overview
LM319AMX/NOPB from Texas Instruments is a precision high-speed dual comparator IC designed for fast decision-making in analog signal conditioning circuits. 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/DTL/RTL loads up to 25 mA per output - used in relay drivers, window detectors, and power supply monitoring.
For engineers reviewing the LM319AMX/NOPB datasheet, LM319AMX/NOPB pinout, LM319AMX/NOPB application, or LM319AMX/NOPB equivalent, this page provides verified electrical specifications, SOIC-14 package details, real-world use cases, and validated alternative options for industrial control, test equipment, and embedded timing-critical comparators.
Technical Context
The LM319AMX/NOPB implements two independent open-collector comparators with uncommitted NPN output transistors, enabling direct interface to TTL logic or external pull-up networks. Its architecture features high common-mode slew rate and input isolation from system ground, supporting operation across wide supply ranges without level-shifting circuitry.
Designed for 0°C to +70°C ambient, it offers improved precision over standard LM319: max 2-mV input offset voltage, 80-nA input offset current, and 40 V/mV voltage gain at 25°C - all specified under ±15-V and single 5-V conditions, making it suitable for mixed-supply systems requiring deterministic threshold detection.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Response Time | 80 ns typical at ±15 V - enables sub-100-ns decision latency for fast edge detection in motor control or pulse-width monitoring. |
| Input Offset Voltage | Max 2 mV at 25°C - ensures ≤2-mV threshold error in precision zero-crossing or reference-comparison applications. |
| Input Offset Current | Max 80 nA at 25°C - minimizes voltage error across high-impedance sensor inputs (e.g., thermistor bridges). |
| Supply Voltage Range | Single 5 V or dual ±15 V - allows direct integration into 5-V logic systems or ±15-V op-amp signal chains without regulators. |
| Output Sink Current | 25 mA per channel - directly drives relays, LEDs, or logic gates without external buffer transistors. |
| Input Common-Mode Range | ±13 V at ±15 V supply - accepts signals near rail-to-rail without clamping or distortion in industrial sensor interfaces. |
| Operating Temperature | 0°C to +70°C - qualified for commercial-grade embedded systems including instrumentation and programmable logic controllers. |
Pinout & Package
LM319AMX/NOPB is housed in a 14-pin SOIC (D) package, 8.75 mm × 4.0 mm body size, 1.75 mm max height, with gull-wing leads and RoHS-compliant matte tin (SN) finish. Pin 1 is located at the top-left corner with notch or beveled edge marking.
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Output 1 | Open-collector NPN output - requires external pull-up to define logic HIGH level and sink up to 25 mA. |
| 2 | GND 1 | Ground reference for comparator 1 - separate from comparator 2 ground to support isolated signal domains. |
| 3 | Input 1+ | Non-inverting input - accepts analog signals up to ±13 V common-mode with ±15 V supply. |
| 4 | Input 1− | Inverting input - differential pair input with max 2-mV offset for accurate threshold comparison. |
| 5 | V− | Negative supply pin - connects to −15 V or ground depending on single/dual supply configuration. |
| 6 | Output 2 | Open-collector NPN output - independent of Output 1; enables dual-threshold or redundant sensing. |
| 7 | GND 2 | Ground reference for comparator 2 - electrically isolated from GND 1 to prevent crosstalk in split-ground designs. |
| 8 | Input 2+ | Non-inverting input - identical electrical specs to Input 1+, supporting parallel or cascaded comparison paths. |
| 9 | Input 2− | Inverting input - matched offset and bias current to Input 1− for consistent dual-channel performance. |
| 10 | V+ | Positive supply pin - accepts +5 V (single supply) or +15 V (dual supply); max 16 V absolute rating. |
| 11–14 | No Connect | Unused pins - must remain floating; no internal connection or function. |
Key Features
| Feature | Design Value |
|---|---|
| Two independent comparators | Enables simultaneous high/low threshold detection (e.g., window comparator) without inter-channel delay or coupling. |
| 80-ns response time | Supports >10 MHz pulse discrimination in digital communications or switching power supply feedback loops. |
| Open-collector outputs | Allows wired-OR logic, level translation across voltage domains, and direct drive of lamps/relays up to 25 mA. |
| ±13-V input common-mode range | Accepts signals referenced to non-ground potentials - critical for motor phase current sensing or isolated DC-DC monitoring. |
| Max 2-mV input offset voltage | Reduces false triggering in low-differential applications such as battery cell voltage balancing or precision reference monitoring. |
Applications
| Motor Overcurrent Protection | Power Supply Sequencing Monitor |
|---|---|
Use Scenario: Detects excessive phase current in BLDC motor drivers by comparing shunt voltage against a fixed threshold. IC Role / Device Role: Dual comparator performs real-time current limit check and fault latching via cross-coupled outputs. Use Value: 80-ns response prevents IGBT shoot-through during transient overloads; open-collector outputs interface directly with gate driver enable lines. |
Use Scenario: Verifies correct ramp-up order of multiple DC rails (e.g., 12 V → 5 V → 3.3 V) before enabling downstream logic. IC Role / Device Role: Each comparator monitors one rail against its reference; outputs feed AND gate for system enable. Use Value: Max 2-mV offset ensures sequencing accuracy within ±5 mV tolerance; SOIC-14 footprint simplifies layout in space-constrained PSU PCBs. |
| Relay Driver Interface | Window Detector for Sensor Calibration |
Use Scenario: Drives electromechanical relays in HVAC control panels based on temperature or pressure thresholds. IC Role / Device Role: Comparator output sinks relay coil current (≤25 mA) through open-collector stage; no external transistor needed. Use Value: Direct 25-mA sink capability eliminates BOM cost and board area of discrete driver transistors; TTL-compatible output logic levels. |
Use Scenario: Validates thermistor output stays within calibrated min/max bounds during factory sensor trim. IC Role / Device Role: One comparator checks upper limit, the other lower limit; outputs combined to flag out-of-window condition. Use Value: Matched offset and gain between channels ensure symmetric window edges; 80-ns response enables automated calibration test fixtures. |
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 |
|---|---|---|---|
| LM319MX/NOPB | Standard LM319 grade: max 8-mV offset voltage vs. LM319AMX/NOPB's 2-mV; otherwise identical SOIC-14 packaging and speed. | Suitable where ±8-mV threshold error is acceptable - e.g., non-critical power-good detection or coarse level sensing. | Select LM319MX/NOPB when cost sensitivity outweighs precision requirements; same footprint and pinout. |
| TLV3502IDR | Rail-to-rail input, 4.5-ns propagation delay, CMOS output (push-pull), 2.7–5.5-V supply only - no ±15-V support. | Optimized for low-voltage, high-speed digital systems (e.g., ADC trigger, FPGA clock domain crossing); not compatible with bipolar supply designs. | Choose TLV3502IDR only for new 3.3-V designs requiring nanosecond response; not a drop-in replacement for LM319AMX/NOPB. |
Compared with LM319MX/NOPB, LM319AMX/NOPB delivers tighter offset for precision thresholding without layout or supply changes; versus TLV3502IDR, it retains ±15-V compatibility and open-collector flexibility at the cost of speed - critical for legacy industrial analog systems.
Availability
LM319AMX/NOPB is available at Aetrix Electronics and suitable for motor control, power supply sequencing, relay interface, and sensor window detection applications requiring stable component supply across extended production cycles.
Supply support for LM319AMX/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, embedded processing, and connectivity technologies, with decades of expertise in precision analog IC design and high-reliability manufacturing.
The LM319A series was developed specifically for industrial and instrumentation applications demanding high-speed, dual-channel comparison with robust supply flexibility and guaranteed offset performance - targeting systems where timing determinism and analog accuracy are non-negotiable.
FAQ
What is the maximum supply voltage for LM319AMX/NOPB?
The LM319AMX/NOPB supports total supply voltage up to 36 V, with absolute maximum ratings of ±15 V for dual supply or 5 V to 36 V for single supply. Operation above 16 V between ground and either supply rail is prohibited per datasheet Section 5.1. The device is fully characterized at ±15 V and single 5-V operation, and LM319AMX/NOPB must not exceed these limits to ensure reliability and specification compliance.
Does LM319AMX/NOPB support rail-to-rail input operation?
No, LM319AMX/NOPB does not support rail-to-rail input. Its input common-mode voltage range is specified as ±13 V with ±15-V supplies, or 1 V to 3 V with a single 5-V supply - meaning inputs must stay ≥2 V below V+ and ≥2 V above V−. This limitation is inherent to its bipolar input stage; LM319AMX/NOPB cannot accept signals within ~2 V of either supply rail without performance degradation or undefined behavior.
Can LM319AMX/NOPB drive a relay directly?
Yes, LM319AMX/NOPB can drive small to medium electromechanical relays directly: each open-collector output sinks up to 25 mA at saturation voltage ≤1.5 V (with 25-mA load and ±15-V supply). For a typical 12-V, 20-mA relay coil, LM319AMX/NOPB requires only an external pull-up resistor to V+; no additional transistor stage is needed - confirmed in TI's "Typical Application – Relay Driver" (Figure 25).
What is the difference between LM319AMX/NOPB and LM319MX/NOPB?
LM319AMX/NOPB is the precision grade with tighter specifications: max 2-mV input offset voltage and 80-nA offset current, versus LM319MX/NOPB's 8-mV and 200-nA limits. Both share identical SOIC-14 packaging, 80-ns response time, and supply range. LM319AMX/NOPB is selected when threshold accuracy is critical - e.g., in calibration equipment or safety interlocks - while LM319MX/NOPB serves cost-sensitive, less precise applications. LM319AMX/NOPB remains pin-compatible and drop-in replaceable for LM319MX/NOPB.
Is LM319AMX/NOPB RoHS compliant and lead-free?
Yes, LM319AMX/NOPB is RoHS compliant and lead-free. Per TI's Package Option Addendum, the part marking "LM319AM", material type "Production", and "Yes" in the RoHS column confirm full compliance. Its lead finish is matte tin (SN), and it carries MSL Level-1 rating (unlimited floor life at ≤30°C/60% RH), making LM319AMX/NOPB suitable for modern lead-free reflow assembly processes without special handling.
LM319AMX/NOPB Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Package/Case:
- 14-SOIC (0.154", 3.90mm Width)
- Series:
- -
- Packaging:
- Tape & Reel (TR)
- 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
LM319AMX/NOPB FAQ
1.How can I place an order for LM319AMX/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LM319AMX/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 LM319AMX/NOPB reliable?
The price and inventory of LM319AMX/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM319AMX/NOPB is usually 5 days.
3.What payment methods are accepted for LM319AMX/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM319AMX/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM319AMX/NOPB?
LM319AMX/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM319AMX/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 LM319AMX/NOPB?
For technical support, including LM319AMX/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM319AMX/NOPB requirements.
6.How does Aetrix verify that LM319AMX/NOPB is sourced from the original manufacturer or authorized distributors?
All LM319AMX/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 LM319AMX/NOPB meets industry standards.
7.What is the process for return or replacement of LM319AMX/NOPB?
All LM319AMX/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LM319AMX/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 LM319AMX/NOPB part is unused and in its original packaging.
Return procedure for LM319AMX/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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