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Texas Instruments LM119J
- Part No.:
- LM119J
- Manufacturer:
- Texas Instruments
- Category:
- Comparators
- Package:
- 14-CDIP (0.300", 7.62mm)
- Datasheet:
-
LM119J.pdf
- Description:
- IC COMPARATOR 2 GEN PUR 14CDIP
- Quantity:
- Payment:
- Shipping:
Inventory:543
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Product details
Overview
LM119J from Texas Instruments is a high-speed dual comparator IC designed for precision timing and level-detection circuits operating across −55°C to +125°C. It features two independent comparators, 80-ns typical response time at ±15 V, uncommitted open-collector outputs capable of sinking 25 mA, and operates from single 5-V or dual ±15-V supplies. It is used in relay drivers, window detectors, and industrial control interfaces requiring wide temperature range and TTL/DTL/RTL compatibility.
For engineers reviewing the LM119J datasheet, LM119J pinout, LM119J application, or LM119J equivalent, this page delivers verified specifications, package mapping (CDIP-14), thermal data (RθJA = 100°C/W), input offset voltage (max 7 mV), and real-world use context - all confirmed from TI's production-grade SNOSBJ2B datasheet and orderable addendum.
Technical Context
The LM119J implements two independent voltage comparators with high-gain differential input stages and uncommitted NPN output transistors. Its input stage supports common-mode voltages up to ±13 V with ±15-V supplies and maintains ≤1 μA max input current over full temperature range.
It uses an open-collector output architecture enabling direct interface with TTL, DTL, RTL, lamps, and relays without external pull-ups. The device is fully specified for operation from −55°C to +125°C and includes isolation between inputs/outputs and system ground - critical for noise-immune industrial sensing.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Response Time | 80 ns typical at ±15 V supply; enables fast edge detection in motor control feedback or pulse-width monitoring. |
| Input Offset Voltage | Max 7 mV over temperature; defines worst-case DC error band when comparing near-equal analog signals. |
| Output Sink Current | 25 mA per channel; directly drives relays, LEDs, or logic inputs without external buffer transistors. |
| Supply Voltage Range | Single 5 V or dual ±15 V; supports integration into both digital logic subsystems and analog signal chains. |
| Operating Temperature | −55°C to +125°C; qualified for military, aerospace, and under-hood automotive applications. |
| Input Bias Current | Max 1000 nA; ensures minimal loading on high-impedance sensor sources like thermistors or photodiodes. |
| Common-Mode Input Range | ±13 V at ±15 V supply; allows comparison of signals referenced to non-ground potentials in isolated systems. |
Pinout & Package
LM119J is packaged in a hermetically sealed 14-pin Ceramic Dual In-Line Package (CDIP-J), 6.67 mm × 19.56 mm body size, with 5.08 mm maximum height and glass-frit ceramic lid. Designed for high-reliability, long-lifecycle applications where moisture resistance and thermal stability are critical.
| 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; isolates biasing from second comparator's ground path. |
| 3 | Comparator 1 Non-Inverting Input | High-impedance input accepting signals up to ±13 V common-mode; used for reference or signal monitoring. |
| 4 | Comparator 1 Inverting Input | Paired with Pin 3 to form differential input pair; offset voltage spec applies across this pair. |
| 5 | Negative Supply Voltage (V−) | Accepts −15 V max; sets lower rail for dual-supply operation and defines lower common-mode limit. |
| 6 | Comparator 2 Output | Independent open-collector output; enables dual-threshold or window-comparison architectures. |
| 7 | Comparator 2 Ground | Separate ground terminal for second comparator; supports split-ground or isolated sensor interfacing. |
| 8 | Comparator 2 Non-Inverting Input | Second high-Z input; allows simultaneous evaluation of two independent analog conditions. |
| 9 | Comparator 2 Inverting Input | Completes second differential pair; enables independent hysteresis or threshold setting per channel. |
| 10 | Positive Supply Voltage (V+) | Accepts +15 V max; defines upper rail and common-mode range; also supports single 5-V operation. |
| 1,2,13,14 | No Connect | Not internally bonded; must remain unconnected to avoid parasitic coupling or mechanical stress. |
Key Features
| Feature | Design Value |
|---|---|
| Two Independent Comparators | Enables dual-threshold detection (e.g., window comparator) or redundant signal validation without external ICs. |
| Uncommitted Open-Collector Outputs | Permits wired-OR logic, level translation across voltage domains, and direct drive of 25-mA loads like relays. |
| Wide Supply Range (5 V to ±15 V) | Eliminates need for separate power rails in mixed-signal systems; simplifies BOM and layout for legacy designs. |
| Input/Output Ground Isolation | Supports floating sensor interfaces and prevents ground-loop errors in multi-channel industrial measurement. |
| High Common-Mode Slew Rate | Maintains accurate comparison during fast-rising common-mode transients (e.g., motor commutation noise). |
Applications
| Relay Driver Interface | Window Detector Circuit |
|---|---|
|
Use Scenario: Driving electromechanical relays in programmable logic controllers (PLCs) where microcontroller GPIOs lack sufficient current drive. IC Role / Device Role / Timing Role: LM119J acts as a high-speed level translator and current amplifier, converting low-current logic thresholds into robust 25-mA relay coil actuation signals. Use Value: Eliminates discrete transistor buffers; leverages open-collector outputs and −55°C to +125°C rating for reliable operation in harsh industrial enclosures. |
Use Scenario: Monitoring battery voltage in aerospace avionics to trigger low/high alert flags before critical undervoltage or overvoltage thresholds. IC Role / Device Role / Timing Role: LM119J implements a dual-comparator window detector, with one channel sensing upper limit and the other lower limit simultaneously. Use Value: Achieves sub-80-ns response to rapid voltage excursions; uses dedicated ground pins per comparator to reject supply rail noise during transient events. |
| Motor Overcurrent Protection | Temperature Threshold Monitor |
|
Use Scenario: Detecting overcurrent in brushed DC motor H-bridge drivers using shunt voltage feedback, with immediate shutdown signaling. IC Role / Device Role / Timing Role: LM119J compares amplified shunt voltage against precision reference; its 80-ns response enables cycle-by-cycle current limiting. Use Value: Prevents MOSFET failure by reacting faster than thermal propagation delays; CDIP package ensures stable operation at elevated board temperatures. |
Use Scenario: Monitoring thermistor-based temperature sensors in military-grade power supplies to disable output if heatsink exceeds safe thermal limits. IC Role / Device Role / Timing Role: LM119J compares conditioned thermistor voltage against fixed reference; input bias current <1 μA avoids self-heating errors in high-resistance sensors. Use Value: Maintains accuracy across −55°C to +125°C ambient; isolated ground pins prevent ground-shift errors from high-current power sections. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual comparator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM319N/NOPB | Commercial-grade (0°C to +70°C), higher input offset voltage (10 mV max), same CDIP-14 package and pinout. | Restricted to non-military, non-extended-temperature environments; unsuitable for aerospace or under-hood use. | Select LM319N/NOPB only when cost sensitivity outweighs extended temperature and precision requirements. |
| LM219N/NOPB | Industrial-grade (−25°C to +85°C), identical electrical specs to LM119J except temperature range and slightly higher RθJA (100°C/W vs. 100°C/W). | Lacks full military temperature qualification; acceptable for factory automation but not flight-critical systems. | Choose LM219N/NOPB for cost-sensitive industrial controls where −55°C operation is unnecessary. |
Compared with LM119J, LM319N/NOPB trades military temperature range and tighter offset for lower cost and RoHS compliance, while LM219N/NOPB offers intermediate thermal qualification - neither provides the full −55°C to +125°C capability or guaranteed 7-mV offset performance of LM119J.
Availability
LM119J is available at Aetrix Electronics and suitable for relay driver interfaces, window detector circuits, motor overcurrent protection, and temperature threshold monitors requiring stable component supply across extended temperature ranges and long product lifecycles.
Supply support for LM119J 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, with decades of heritage in precision analog design and military-grade qualification.
The LM119J belongs to TI's LMx19 high-speed dual comparator product line, engineered for applications demanding fast response, wide supply flexibility, and operation in extreme environmental conditions - especially where reliability trumps cost.
FAQ
What is the maximum operating temperature range for the LM119J?
The LM119J is fully specified from −55°C to +125°C, making it suitable for military, aerospace, and under-hood automotive applications. This range is explicitly defined in Section 5.1 of the SNOSBJ2B datasheet and validated through TI's extended temperature testing protocols. Unlike commercial variants such as LM319N, the LM119J maintains all electrical characteristics-including 80-ns response time and ≤7-mV input offset-across this full range.
Does the LM119J support single-supply operation?
Yes, the LM119J operates from a single 5-V supply, as confirmed in the Features section and Section 5.4 Electrical Characteristics of the SNOSBJ2B datasheet. When powered from 5 V (V+ = 5 V, V− = 0 V), it retains key specs: input voltage range of 1 V to 3 V, saturation voltage ≤0.4 V at 3.2 mA sink, and positive supply current of 4.3 mA. This enables direct integration into 5-V logic systems without level-shifting circuitry.
What is the purpose of the separate ground pins (Pins 2 and 7) on the LM119J?
Pins 2 and 7 provide dedicated ground connections for Comparator 1 and Comparator 2, respectively. This isolation prevents crosstalk between channels caused by shared ground impedance, especially critical in noisy industrial environments. The SNOSBJ2B datasheet explicitly states "Inputs and Outputs can be Isolated from System Ground," and the Pin Functions table confirms independent grounding - enabling clean dual-threshold detection even with mismatched sensor grounds.
Can the LM119J drive a relay directly without external transistors?
Yes, each LM119J output can sink up to 25 mA, as specified in Section 5.4 under "Saturation Voltage" (tested at IOUT = 25 mA). Its open-collector architecture allows direct connection of a relay coil between V+ and the output pin, with the LM119J pulling the coil to ground to energize it. This capability is highlighted in the "Typical Application – Relay Driver" (Figure 25) and eliminates need for discrete driver transistors in many designs.
Is the LM119J RoHS compliant?
No, the LM119J is not RoHS compliant. According to TI's Package Option Addendum (page Addendum-Page 1), the LM119J has "RoHS: No" status and uses leaded finish. For RoHS-compliant alternatives, consider LM319N/NOPB (SOIC-14) or LM319AM/NOPB - though these operate only from 0°C to +70°C and lack the LM119J's extended temperature qualification and tighter offset specs.
LM119J Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Package/Case:
- 14-CDIP (0.300", 7.62mm)
- Series:
- -
- Packaging:
- Tube
- Product Status:
- Active
- Type:
- General Purpose
- Number of Elements:
- 2
- Output Type:
- DTL, Open-Collector, RTL, TTL
- Voltage - Supply, Single/Dual (±):
- 5V ~ 36V, ±2.5V ~ 18V
- :
- 4mV @ ±15V
- Voltage - Input Offset (Max):
- 0.5µA @ ±15V
- Current - Input Bias (Max):
- 25mA
- Current - Output (Typ):
- 11.5mA
- Current - Quiescent (Max):
- -
- CMRR, PSRR (Typ):
- -
- Propagation Delay (Max):
- -
- Hysteresis:
- -55°C ~ 125°C
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- Through Hole
- :
- 14-CDIP
LM119J FAQ
1.How can I place an order for LM119J through Aetrix?
Please submit a Request for Quotation (RFQ) for LM119J 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 LM119J reliable?
The price and inventory of LM119J are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM119J is usually 5 days.
3.What payment methods are accepted for LM119J?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM119J transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM119J?
LM119J orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM119J 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 LM119J?
For technical support, including LM119J datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM119J requirements.
6.How does Aetrix verify that LM119J is sourced from the original manufacturer or authorized distributors?
All LM119J 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 LM119J meets industry standards.
7.What is the process for return or replacement of LM119J?
All LM119J units undergo pre-shipment inspection (PSI). If there is an issue with LM119J, 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 LM119J part is unused and in its original packaging.
Return procedure for LM119J:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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