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Home > Products > Integrated Circuits (ICs) > Linear > Comparators

Texas Instruments LM119J-QMLV

Name: LM119J-QMLV
Brand: Texas Instruments
SKU: LM119J-QMLV
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: LM119J-QMLV

Manufacturer:: Texas Instruments

Category:: Comparators

Package:: 14-CDIP (0.300", 7.62mm)

Datasheet:: LM119J-QMLV.pdf

Description:: HIGH SPEED DUAL COMPARATOR 14-CD

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Product details

Overview

LM119J-QMLV from Texas Instruments is a radiation-hardened, high-speed dual comparator designed for space and defense applications requiring operation across ±15V or single 5V supplies. It delivers 80 ns typical response time, 10.5 kV/V voltage gain, ≤3.8 mV input offset voltage, and supports output drive up to 25 mA in relay and lamp control circuits.

For engineers reviewing the LM119J-QMLV datasheet, LM119J-QMLV pinout, LM119J-QMLV application, or LM119J-QMLV equivalent, key selection considerations include its QML-V qualification per MIL-PRF-38535, high-dose-rate (100 krad(Si)) tolerance, ELDRS-free performance, and compatibility with TTL/DTL/RTL logic interfaces without level-shifting circuitry.

Technical Context

The LM119J-QMLV integrates two independent comparators on a monolithic die, each featuring uncommitted NPN open-collector outputs capable of sinking 25 mA. Its input stage uses matched transistor pairs to achieve low input bias current (≤0.95 µA) and high common-mode slew rate, enabling stable operation under fast-rising input transients.

It operates over −55°C to +125°C ambient temperature and is fully specified for supply voltages from ±15V down to single 5V/0V, with input voltage range extending to ±12V at full supply and 1.0–3.0 V at 5V operation. The device isolates inputs and outputs from system ground via separate GND1/GND2 pins, supporting floating or isolated sensing topologies.

Key Specifications

Parameter	Value and Actual Design Meaning
Response Time	80 ns typical at ±15V - enables detection of fast analog transitions in timing-critical systems like pulse-width discriminators.
Input Offset Voltage	±3.8 mV max at 25°C - ensures accurate threshold comparison in precision window detectors and zero-crossing circuits.
Supply Range	±15V or +5V/0V - supports direct interfacing with legacy TTL logic and modern low-voltage digital controllers without external regulators.
Output Drive	25 mA sink capability - directly drives relays, LEDs, and small solenoids without external buffer transistors.
Radiation Tolerance	100 krad(Si) total ionizing dose, ELDRS-free - qualified for long-duration missions in geosynchronous and deep-space environments.
Operating Temperature	−55°C to +125°C - meets MIL-STD-883 Group A/B testing requirements for military-grade reliability.
Voltage Gain	10.5 kV/V at ±15V - provides high loop gain for clean output transitions even with marginal input overdrive.

Pinout & Package

LM119J-QMLV is packaged in a 14-pin Ceramic Dual In-line Package (CDIP), designated Package Number J0014A, with hermetic sealing and gold-plated leads suitable for high-reliability aerospace assembly.

Pin/Terminal	Circuit Role	Design Meaning
1	IN− 1	Inverting input for comparator 1 - referenced against IN+1 to determine output state; supports differential or single-ended configurations.
2	IN+ 1	Non-inverting input for comparator 1 - used with IN−1 to set threshold; compatible with rail-to-rail input common-mode range.
3	GND 1	Ground reference for comparator 1 inputs and internal bias - electrically isolated from GND2 to enable dual-ground or floating sensor interfaces.
4	OUTPUT 1	Open-collector NPN output for comparator 1 - requires external pull-up to V+ or logic rail; sinks up to 25 mA.
5	N/C	No connection - internally unused; must remain unconnected per TI design guidelines.
6	N/C	No connection - internally unused; must remain unconnected.
7	N/C	No connection - internally unused; must remain unconnected.
8	N/C	No connection - internally unused; must remain unconnected.
9	OUTPUT 2	Open-collector NPN output for comparator 2 - independently controllable; shares same output drive capability as OUTPUT 1.
10	N/C	No connection - internally unused; must remain unconnected.
11	GND 2	Ground reference for comparator 2 inputs and internal bias - isolated from GND1 to support dual-reference or isolated signal chains.
12	IN− 2	Inverting input for comparator 2 - functionally identical to IN−1 but electrically isolated for independent channel operation.
13	IN+ 2	Non-inverting input for comparator 2 - used with IN−2 to define second independent threshold.
14	V+	Positive supply terminal - accepts +5V to +18V relative to GND1/GND2; powers both comparators and output stages.
15	V−	Negative supply terminal - accepts −1V to −15V relative to GND1/GND2; required for bipolar operation; case-connected in TO-100 variant (not applicable to CDIP).

Key Features

Feature	Design Value
QML-V Qualification	Qualified per MIL-PRF-38535 Class V, including full Group A through Group E testing at −55°C, 25°C, and +125°C.
High Dose Rate Tolerance	100 krad(Si) TID hardness verified per MIL-STD-883 Method 1019 Condition A - suitable for nuclear survivability applications.
ELDRS-Free Performance	No enhanced low-dose-rate sensitivity confirmed per MIL-STD-883 Method 1019 Condition D - eliminates post-launch parameter drift in GEO orbits.
Independent Ground Pins	GND1 and GND2 allow separate grounding of analog inputs and output loads - reduces ground-loop noise in mixed-signal systems.
Wide Supply Flexibility	Operates from ±15V, +5V/0V, or asymmetric rails (e.g., +5V/−1V) - simplifies power architecture in multi-rail avionics subsystems.

Applications

Relay Driver	Window Detector
Use Scenario: Driving electromechanical relays in satellite payload power switching modules where isolation and radiation immunity are critical. IC Role / Device Role: Dual comparator acts as threshold-triggered switch controller - one channel enables relay coil activation, the other monitors coil current feedback. Use Value: 25 mA output sink eliminates need for discrete driver transistors, reducing BOM count and failure modes in radiation-prone environments.	Use Scenario: Monitoring battery voltage in launch vehicle telemetry systems to detect out-of-range conditions before critical thresholds are breached. IC Role / Device Role: Comparator pair implements precise upper/lower voltage limits - IN+1/IN−1 sets VUT, IN+2/IN−2 sets VLT, with OR'd outputs signaling violation. Use Value: ≤3.8 mV input offset ensures <10 mV total window error, enabling reliable detection of 50 mV deviations in 28 V bus monitoring.
Pulse Width Discriminator	Zero-Crossing Detector
Use Scenario: Identifying valid command pulses in spacecraft command decoders where pulse duration must exceed 200 ns to reject noise-induced glitches. IC Role / Device Role: One comparator detects rising edge, the other falling edge; timing network between outputs generates width-limited strobe. Use Value: 80 ns propagation delay enables discrimination of pulses as narrow as 250 ns, meeting CCSDS telemetry integrity requirements.	Use Scenario: Synchronizing ADC sampling to AC line zero crossings in onboard power quality analyzers aboard orbital platforms. IC Role / Device Role: Comparator compares AC signal to ground-referenced threshold; hysteresis added externally to suppress noise near crossing point. Use Value: High common-mode slew rate (>1 V/µs) maintains timing accuracy even with distorted waveforms containing harmonics up to 5 kHz.

Relay Driver

Window Detector

Use Scenario: Driving electromechanical relays in satellite payload power switching modules where isolation and radiation immunity are critical.

IC Role / Device Role: Dual comparator acts as threshold-triggered switch controller - one channel enables relay coil activation, the other monitors coil current feedback.

Use Value: 25 mA output sink eliminates need for discrete driver transistors, reducing BOM count and failure modes in radiation-prone environments.

Use Scenario: Monitoring battery voltage in launch vehicle telemetry systems to detect out-of-range conditions before critical thresholds are breached.

IC Role / Device Role: Comparator pair implements precise upper/lower voltage limits - IN+1/IN−1 sets VUT, IN+2/IN−2 sets VLT, with OR'd outputs signaling violation.

Use Value: ≤3.8 mV input offset ensures <10 mV total window error, enabling reliable detection of 50 mV deviations in 28 V bus monitoring.

Pulse Width Discriminator

Zero-Crossing Detector

Use Scenario: Identifying valid command pulses in spacecraft command decoders where pulse duration must exceed 200 ns to reject noise-induced glitches.

IC Role / Device Role: One comparator detects rising edge, the other falling edge; timing network between outputs generates width-limited strobe.

Use Value: 80 ns propagation delay enables discrimination of pulses as narrow as 250 ns, meeting CCSDS telemetry integrity requirements.

Use Scenario: Synchronizing ADC sampling to AC line zero crossings in onboard power quality analyzers aboard orbital platforms.

IC Role / Device Role: Comparator compares AC signal to ground-referenced threshold; hysteresis added externally to suppress noise near crossing point.

Use Value: High common-mode slew rate (>1 V/µs) maintains timing accuracy even with distorted waveforms containing harmonics up to 5 kHz.

Equivalent & Alternatives

The following parts are listed as comparable options for similar dual comparator applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
LM119JRQMLV	Same die, CDIP package, QML-V rated but with different screening lot traceability and test subgroup coverage (Group B only vs. full Group A–E for LM119J-QMLV).	Approved for less stringent mission profiles where full Group A thermal cycling and mechanical shock testing are not mandated.	Select when cost or lead time constraints exist and radiation environment is moderate (e.g., LEO with shielding).
LM119HRLQMLV	TO-100 metal-can package (10-pin), same electrical specs, but different thermal resistance (θJA = 162°C/W still air) and mechanical mounting interface.	Suitable for high-vibration environments where ceramic DIP solder joints may fatigue; requires different PCB footprint and thermal management.	Select for launch-stage electronics where mechanical robustness outweighs board space efficiency.

Compared with LM119JRQMLV and LM119HRLQMLV, the LM119J-QMLV offers full MIL-PRF-38535 Class V qualification with complete Group A–E testing, making it the only option certified for end-to-end mission-critical functions in unshielded GEO or deep-space deployments.

Availability

LM119J-QMLV is available at Aetrix Electronics and suitable for satellite telemetry systems, missile guidance sensors, and nuclear instrumentation requiring stable component supply across extended product lifecycles and radiation-hardened assurance.

Supply support for LM119J-QMLV 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 aerospace, defense, and industrial markets.

The LM119QML product line was developed to meet MIL-STD-883 and MIL-PRF-38535 requirements for radiation-tolerant comparators in mission-critical avionics and space electronics.

FAQ

What is the maximum operating supply voltage for LM119J-QMLV?

The LM119J-QMLV supports a total supply voltage up to 36 V, with absolute maximum ratings of ±15 V across V+ and V− terminals. Operation beyond ±15 V risks permanent damage; for single-supply use, V+ may be up to +18 V relative to GND1/GND2, and V− may be as low as −1 V. These limits are strictly enforced per MIL-PRF-38535 screening and must not be exceeded in flight hardware.

Does LM119J-QMLV require external pull-up resistors on its outputs?

Yes, LM119J-QMLV features open-collector NPN outputs (OUTPUT 1 and OUTPUT 2) that require external pull-up resistors to V+ or another logic rail. Typical values range from 1 kΩ to 10 kΩ depending on speed and load current requirements. Without pull-ups, outputs remain floating and cannot assert a high logic state - this is inherent to the LM119J-QMLV's TTL/DTL-compatible output architecture.

How does LM119J-QMLV differ from commercial-grade LM119 variants?

The LM119J-QMLV differs from commercial LM119 parts through full QML-V qualification per MIL-PRF-38535 Class V, including radiation testing (100 krad(Si) TID, ELDRS-free), extended temperature operation (−55°C to +125°C), enhanced screening (Group A–E), and hermetic CDIP packaging. Commercial versions lack radiation data, temperature range validation, and process controls required for flight-critical use.

Can LM119J-QMLV operate from a single 5V supply?

Yes, LM119J-QMLV is explicitly specified for single 5V operation (V+ = 5V, V− = 0V). Input common-mode range is 1.0 V to 3.0 V under this condition, and output saturation voltage is 0.4 V at 4 mA load. This configuration is validated in the SMD 8601401 and 5962-9679801 specifications and supports direct interfacing with 5V microcontrollers and FPGAs.

What is the purpose of separate GND1 and GND2 pins on LM119J-QMLV?

GND1 and GND2 provide electrically isolated ground references for comparator 1 and comparator 2, respectively. This allows independent grounding of input signal paths and output loads - critical for eliminating ground-loop interference in high-precision, multi-channel sensing systems such as isolated current monitors or differential bus receivers. The LM119J-QMLV's internal circuitry maintains functional separation between these grounds.

LM119J-QMLV 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:: Open-Collector, DTL, RTL, TTL

Voltage - Supply, Single/Dual (±):: 36V

:: 4mV @ ±15V

Voltage - Input Offset (Max):: 0.5µA @ ±15V

Current - Input Bias (Max):: -

Current - Output (Typ):: 4.5mA, 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-QMLV FAQ

1.How can I place an order for LM119J-QMLV through Aetrix?

Please submit a Request for Quotation (RFQ) for LM119J-QMLV 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-QMLV reliable?

The price and inventory of LM119J-QMLV are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM119J-QMLV is usually 5 days.

3.What payment methods are accepted for LM119J-QMLV?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM119J-QMLV transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for LM119J-QMLV?

LM119J-QMLV orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your LM119J-QMLV 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-QMLV?

For technical support, including LM119J-QMLV datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM119J-QMLV requirements.

6.How does Aetrix verify that LM119J-QMLV is sourced from the original manufacturer or authorized distributors?

All LM119J-QMLV 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-QMLV meets industry standards.

7.What is the process for return or replacement of LM119J-QMLV?

All LM119J-QMLV units undergo pre-shipment inspection (PSI). If there is an issue with LM119J-QMLV, 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-QMLV part is unused and in its original packaging.

Return procedure for LM119J-QMLV:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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