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Texas Instruments LM319 MWA
- Part No.:
- LM319 MWA
- Manufacturer:
- Texas Instruments
- Category:
- Comparators
- Package:
- Die
- Datasheet:
-
LM319 MWA.pdf
- Description:
- IC COMPARATR 2 GEN PUR WAFERSALE
- Quantity:
- Payment:
- Shipping:
Inventory:1,782
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Product details
Overview
LM319 MWA from Texas Instruments is a high-speed dual comparator IC designed for precision threshold detection in industrial control, relay driving, and window comparator circuits. It operates from single 5-V or dual ±15-V supplies, delivers 80-ns typical response time, supports ±5-V differential input voltage, and drives up to 25 mA per output - enabling direct interface with TTL/DTL/RTL logic and electromechanical loads.
For engineers reviewing the LM319 MWA datasheet, LM319 MWA pinout, LM319 MWA application, or LM319 MWA equivalent, this page provides verified technical context, package-specific pin mapping (TO-100 metal can), real-world use scenarios, and two validated alternative parts with documented functional and parametric differences.
Technical Context
The LM319 MWA implements two independent, uncommitted-collector comparators on a monolithic bipolar process, supporting wide supply ranges (5 V to ±15 V) and featuring high common-mode slew rate. Its open-collector outputs allow flexible pull-up configurations and direct drive of relays or lamps without external buffering.
It is specified for 0°C to +70°C operation and exhibits 8 mV max input offset voltage, 200 nA max input offset current, and 8–40 V/mV voltage gain - optimized for speed over ultra-low power or ultra-precision trade-offs. Input isolation from system ground enables floating-sense applications.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Response Time | 80 ns typical at ±15 V - enables fast edge detection in motor control feedback or pulse-width monitoring. |
| Supply Voltage Range | Single 5 V or dual ±15 V - compatible with both digital logic rails and analog signal conditioning stages. |
| Input Offset Voltage | 8 mV max at 25°C - defines worst-case threshold error in precision level-sensing applications. |
| Output Drive Capability | 25 mA sink per channel - sufficient to directly energize 5 V/12 V relays or LED arrays without external transistors. |
| Differential Input Voltage | ±5 V - limits safe input swing across both inputs, critical for overvoltage-tolerant sensor interfacing. |
| Input Bias Current | 1000 nA max - impacts high-impedance source loading in battery-powered or photodiode-based sensing. |
| Operating Temperature | 0°C to +70°C - suitable for commercial-grade embedded systems, not extended industrial or automotive environments. |
Pinout & Package
LM319 MWA is packaged in a hermetically sealed TO-100 (LME) 10-pin metal can with 8.96 mm × 8.96 mm body size and 5.72 mm max height. The package features axial leads and is designed for through-hole mounting with thermal resistance of 160°C/W (junction-to-ambient).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (OUTPUT 1) | Open-collector output of comparator 1 | Requires external pull-up; sinks up to 25 mA; interfaces directly with TTL/relay coils. |
| 2 (GND 1) | Ground reference for comparator 1 | Independent ground terminal allows isolated sensing paths; must be connected to system ground or local reference. |
| 3 (INPUT 1+) | Inverting input of comparator 1 | Accepts signals within ±13 V of supply rails; high-impedance node sensitive to PCB leakage and noise coupling. |
| 4 (INPUT 1-) | Non-inverting input of comparator 1 | Paired with Pin 3 for differential comparison; offset voltage spec applies between these pins. |
| 5 (V−) | Negative supply rail connection | Required for dual-supply operation; tied to ground for single 5-V use (V− = 0 V). |
| 6 (OUTPUT 2) | Open-collector output of comparator 2 | Functionally identical to Pin 1; enables independent dual-threshold detection in window circuits. |
| 7 (GND 2) | Ground reference for comparator 2 | Separate ground terminal supports split-ground architectures or noise-isolated signal chains. |
| 8 (INPUT 2+) | Inverting input of comparator 2 | Used with Pin 9 for second independent comparison; shares same electrical specs as Pins 3/4. |
| 9 (INPUT 2-) | Non-inverting input of comparator 2 | Enables simultaneous high/low threshold evaluation when paired with external resistive dividers. |
| 10 (V+) | Positive supply rail connection | Accepts 5 V (single) or +15 V (dual); maximum 16 V between V+ and GND per absolute rating. |
Key Features
| Feature | Design Value |
|---|---|
| Two independent comparators | Enables dual-threshold detection (e.g., window comparator) or redundant signal validation without extra ICs. |
| Uncommitted collector outputs | Supports wired-OR logic, mixed-voltage interfacing, and direct drive of 25 mA loads - eliminates need for external driver transistors. |
| High common-mode slew rate | Permits accurate comparison of fast-rising signals even under large common-mode transients (e.g., motor commutation noise). |
| Input isolation from system ground | Allows floating-input configurations for isolated sensor measurement or ground-referenced signal injection into biased circuits. |
| Wide supply range compatibility | Operates identically from 5 V logic rails or ±15 V op-amp supplies - simplifies mixed-signal board design and reduces rail count. |
Applications
| Relay Driver Circuit | Window Comparator |
|---|---|
|
Use Scenario: Driving a 12 V DC relay coil in an industrial PLC I/O module where fast response to analog sensor thresholds is required. IC Role / Device Role: Dual comparator providing hysteresis-free on/off control based on input voltage crossing preset upper/lower bounds. Use Value: Eliminates need for discrete transistor drivers; 80-ns propagation ensures timely actuation during transient fault conditions. |
Use Scenario: Monitoring battery voltage in a portable medical device to trigger low/high alert thresholds before critical shutdown. IC Role / Device Role: Simultaneous high- and low-threshold detection using internal dual comparators with shared reference divider network. Use Value: Reduces BOM count vs. two separate comparators; matched offset specs ensure consistent trip points across temperature. |
| Logic-Level Signal Conditioning | Motor Commutation Feedback |
|
Use Scenario: Converting noisy analog sensor outputs (e.g., thermistor bridge) into clean digital logic levels for microcontroller GPIO input. IC Role / Device Role: High-speed comparator acting as Schmitt-trigger replacement with adjustable threshold via external resistors. Use Value: 80-ns response captures rapid transitions missed by slower comparators; open-collector output matches 3.3 V/5 V MCU input requirements. |
Use Scenario: Detecting zero-crossing events in brushless DC motor phase currents for precise electronic commutation timing. IC Role / Device Role: Fast comparator comparing phase current sense voltage against a fixed reference to generate timing pulses. Use Value: 80-ns delay minimizes commutation timing jitter; ±5 V differential input tolerance accommodates high dv/dt noise in motor drives. |
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 speed (1.3 µs typ), rail-to-rail input, 36 V max supply, SOIC-8 package | Better suited for low-power, wide-supply, space-constrained designs; lacks TO-100 hermetic sealing | Select LM393DR when board space, power budget, or supply flexibility outweigh speed and ruggedness requirements. |
| LM2901DT | Slower (1.3 µs typ), quad configuration, ±15 V/36 V supply, SOIC-14 package | Offers four comparators in same footprint; higher channel density but no performance upgrade over LM319 MWA | Choose LM2901DT only if additional comparator channels are needed and 80-ns speed is not critical. |
Compared with LM393DR and LM2901DT, the LM319 MWA delivers 16× faster response and TO-100 hermetic reliability - making it preferable for time-critical industrial relay control and noise-immune motor feedback, despite higher quiescent current and legacy packaging.
Availability
LM319 MWA is available at Aetrix Electronics and suitable for industrial control systems, relay driver modules, and analog threshold detection circuits requiring stable component supply across long production lifecycles.
Supply support for LM319 MWA 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 high-reliability components for industrial, automotive, and communications markets.
The LM319 series belongs to TI's legacy high-speed comparator product line, engineered specifically for applications demanding sub-100 ns response, robust output drive, and wide supply flexibility in commercial-temperature environments.
FAQ
What is the maximum operating supply voltage for LM319 MWA?
The LM319 MWA supports a total supply voltage up to 36 V, with absolute maximum ratings specifying ±15 V dual supply or 5 V single supply. Operation above 16 V between V+ and ground is prohibited per datasheet Absolute Maximum Ratings table, and the device is rated for 0°C to +70°C ambient operation. Exceeding these limits risks permanent damage or degraded performance.
Does LM319 MWA support rail-to-rail input operation?
No, the LM319 MWA does not support rail-to-rail input operation. Its input voltage range is specified as ±13 V with ±15 V supplies and 1 V to 3 V with 5 V single supply - meaning inputs must remain at least 2 V below V+ and 2 V above V− to guarantee proper function. This limitation arises from its bipolar input stage architecture.
Can LM319 MWA drive a 12 V relay directly?
Yes, the LM319 MWA can drive a 12 V relay directly when configured with an appropriate external pull-up resistor to 12 V. Each open-collector output sinks up to 25 mA, which is sufficient for most small-to-medium 12 V DC relays (e.g., 500 Ω coil). Ensure the relay's coil current stays within the 25 mA limit and that V+ is set to ≥12 V for reliable saturation.
What is the pin 1 identifier for LM319 MWA in the TO-100 package?
In the TO-100 (LME) metal-can package used by LM319 MWA, pin 1 is identified by a circular indentation or dot on the top surface of the can, located adjacent to lead 1 when viewed from above with the indentation at the 12 o'clock position and leads numbered clockwise. The mechanical drawing LME0010A confirms this orientation and specifies 10 axial leads arranged in a single row.
How does LM319 MWA differ from LM319A in key parameters?
The LM319A offers tighter specifications than the standard LM319 MWA: input offset voltage is 2 mV max (vs. 8 mV), input offset current is 80 nA max (vs. 200 nA), and voltage gain is 20–40 V/mV (vs. 8–40 V/mV). These improvements enhance precision in low-level signal comparison but do not affect speed (both specify 80 ns typical response) or output drive capability.
LM319 MWA Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Package/Case:
- Die
- Series:
- -
- Packaging:
- Bulk
- 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:
- -
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- Surface Mount
- :
- Wafersale
LM319 MWA FAQ
1.How can I place an order for LM319 MWA through Aetrix?
Please submit a Request for Quotation (RFQ) for LM319 MWA 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 LM319 MWA reliable?
The price and inventory of LM319 MWA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM319 MWA is usually 5 days.
3.What payment methods are accepted for LM319 MWA?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM319 MWA transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM319 MWA?
LM319 MWA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM319 MWA 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 LM319 MWA?
For technical support, including LM319 MWA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM319 MWA requirements.
6.How does Aetrix verify that LM319 MWA is sourced from the original manufacturer or authorized distributors?
All LM319 MWA 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 LM319 MWA meets industry standards.
7.What is the process for return or replacement of LM319 MWA?
All LM319 MWA units undergo pre-shipment inspection (PSI). If there is an issue with LM319 MWA, 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 LM319 MWA part is unused and in its original packaging.
Return procedure for LM319 MWA:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LM319 MWA Tags
-
LM2903DR
Texas Instruments
-
LM339DR
Texas Instruments
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LM339PWR
Texas Instruments
-
LM393DT
STMicroelectronics
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LM2901PWR
Texas Instruments
-
LM2903DT
STMicroelectronics
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LM393DR
Texas Instruments
-
LM239DR
Texas Instruments
-
LM339APWR
Texas Instruments
-
LM2903P
Texas Instruments
-
LM393ADR
Texas Instruments
-
NCX2200GMAZ
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