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Texas Instruments LM119 MDE
- Part No.:
- LM119 MDE
- Manufacturer:
- Texas Instruments
- Category:
- Comparators
- Package:
- Die
- Datasheet:
-
LM119 MDE.pdf
- Description:
- HIGH SPEED DUAL COMPARATOR 0-DIE
- Quantity:
- Payment:
- Shipping:
Inventory:1,620
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Product details
Overview
LM119 MDE from Texas Instruments is a radiation-hardened, high-speed dual comparator IC designed for precision analog signal comparison in space and military systems. It features two independent comparators, operates from ±15V or single 5V supply, delivers 80 ns typical response time at ±15V, supports ±12V input common-mode range, and drives up to 25 mA output current - enabling direct relay and lamp control in hardened avionics monitoring circuits.
For engineers reviewing the LM119 MDE datasheet, LM119 MDE pinout, LM119 MDE application, or LM119 MDE equivalent, this page provides verified technical context, radiation-tolerant operating limits, dual-comparator timing behavior, and validated alternatives for mission-critical analog threshold detection where ELDERS-free performance and 100 krad(Si) total ionizing dose (TID) resilience are required.
Technical Context
The LM119 MDE implements open-collector TTL/DTL/RTL-compatible outputs with uncommitted collectors, allowing flexible pull-up configuration and system-ground isolation. Its input stage uses bipolar technology optimized for low input bias current (≤0.95 µA) and high common-mode slew rate, supporting fast edge detection across wide supply ranges.
Designed for QML-qualified applications, it meets MIL-STD-883 requirements including Group B dynamic testing at −55°C, 25°C, and 125°C, and is specified for operation from −55°C to +125°C ambient. Radiation performance includes ELDRS-free qualification per SMD 5962-9679802 and high-dose-rate tolerance per SMD 5962-9679801.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | ±15 V or single 5 V - enables compatibility with legacy logic supplies and high-voltage analog rails |
| Typical Response Time | 80 ns at ±15 V - supports high-speed window detection and pulse-width discrimination |
| Input Offset Voltage | ±3.8 mV max at 25°C - ensures accurate threshold setting in precision sensor interfaces |
| Output Drive Capability | 25 mA sink current - directly drives relays, LEDs, and TTL inputs without external buffers |
| Radiation Tolerance | 100 krad(Si) TID, ELDRS-free - qualified for long-duration space missions without parametric degradation |
| Operating Temperature | −55°C to +125°C - supports deployment in extreme-environment launch vehicles and satellite power systems |
| Input Bias Current | 0.47 µA typical at ±15 V - minimizes loading on high-impedance sensor sources |
Pinout & Package
Diesale (bare die) package - no leadframe or molded body; intended for hybrid microcircuit assembly or chip-on-board integration. Requires custom bonding and encapsulation per application-specific reliability requirements.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| V− | Negative Supply | Reference for dual-supply operation; connects to system negative rail or ground in single-supply mode |
| OUTPUT 2 | Comparator 2 Output | Open-collector output requiring external pull-up; sinks up to 25 mA |
| N/C | No Connect | Internally unused terminal; must remain floating or grounded per design rules |
| GND 2 | Ground Reference 2 | Isolated ground path for second comparator section to support differential sensing |
| IN+ 2 | Non-Inverting Input 2 | Positive input for comparator 2; accepts signals within ±12 V common-mode range |
| IN− 2 | Inverting Input 2 | Negative input for comparator 2; supports differential voltage comparisons up to ±5 V |
| OUTPUT 1 | Comparator 1 Output | Open-collector output requiring external pull-up; electrically isolated from OUTPUT 2 |
| IN− 1 | Inverting Input 1 | Positive input for comparator 1; shares same voltage range and bias specs as IN+ 2 |
| IN+ 1 | Non-Inverting Input 1 | Non-inverting input for comparator 1; fully independent of comparator 2 inputs |
| GND 1 | Ground Reference 1 | Isolated ground return for first comparator; enables dual-channel ground separation |
Key Features
| Feature | Design Value |
|---|---|
| Two independent comparators | Enables simultaneous high- and low-threshold detection in window comparator topologies without inter-channel crosstalk |
| ELDRS-free radiation hardening | Guarantees stable offset and gain post-irradiation under low-dose-rate space environments per MIL-STD-883 Method 1019 Condition D |
| Single 5V or ±15V operation | Eliminates need for separate analog/digital supply domains in mixed-signal telemetry modules |
| Input/output ground isolation | Allows comparator sections to reference different ground domains - critical for fault-tolerant power bus monitoring |
| High common-mode slew rate | Supports accurate comparison of fast-rising signals in noisy motor drive or power converter feedback paths |
Applications
| Power Supply Monitor | Avionics Redundancy Checker |
|---|---|
Use Scenario: Real-time validation of primary and backup DC bus voltages in flight control computers. IC Role / Device Role / Timing Role: Dual comparator performs independent overvoltage and undervoltage detection with sub-100 ns latency. Use Value: Enables immediate failover decision within hardware safety loop, meeting DO-254 Level A timing constraints. |
Use Scenario: Cross-checking identical sensor outputs (e.g., inertial measurement units) for disagreement detection. IC Role / Device Role / Timing Role: Compares redundant analog channels using precision offset-matched thresholds. Use Value: Detects latent sensor drift or failure before voting logic triggers, improving system FIT rate by >30%. |
| Satellite Payload Thermal Guard | Radiation-Hardened Relay Driver |
Use Scenario: Monitoring thermistor-based temperature sensors in LEO satellite payload bays exposed to thermal cycling. IC Role / Device Role / Timing Role: Window comparator triggers heater activation only when temperature falls outside safe band. Use Value: Prevents false trips during rapid orbital thermal transients due to 80 ns response and radiation-stable offsets. |
Use Scenario: Directly switching high-current relays in spacecraft power distribution units (PDUs). IC Role / Device Role / Timing Role: Open-collector outputs sink 25 mA to energize relay coils without external drivers. Use Value: Reduces component count and single-point failure risk in Class-S radiation environments. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual comparator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM119J-QMLV | CDIP-14 packaged version with identical die; includes full QML-3 screening and 100 krad(Si) high-dose-rate qualification | Requires PCB footprint for through-hole ceramic DIP; not suitable for chip-on-board or hybrid assemblies | Select when board-level assembly, reworkability, and standard test socket compatibility are prioritized over size and weight |
| LM119HRLQMLV | TO-100 metal-can package; same radiation specs but higher thermal resistance (162°C/W still air) | Used in legacy missile guidance systems with existing TO-100 mechanical interfaces and thermal management | Select when mechanical form factor compatibility with heritage systems or enhanced hermetic sealing is mandatory |
Compared with LM119 MDE, LM119J-QMLV offers plug-and-play integration at the cost of larger volume and mass, while LM119HRLQMLV provides superior hermeticity and legacy fit but requires thermal derating above 85°C ambient - making LM119 MDE optimal for SWaP-constrained hybrid microcircuits where die-level customization is available.
Availability
LM119 MDE is available at Aetrix Electronics and suitable for space vehicle telemetry, nuclear instrumentation, and defense electronics requiring stable component supply across extended product lifecycles and radiation-qualified assurance.
Supply support for LM119 MDE 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 heritage in high-reliability aerospace and defense components.
The LM119 product line was developed for radiation-tolerant analog signal conditioning in mission-critical platforms, emphasizing speed, precision, and survivability in extreme electromagnetic and thermal environments.
FAQ
What is the radiation qualification status of the LM119 MDE?
The LM119 MDE is qualified per SMD 5962-9679802 as ELDRS-free and rated for 100 krad(Si) total ionizing dose. It undergoes full MIL-STD-883 Group B dynamic testing across −55°C, 25°C, and 125°C, with post-irradiation verification confirming VIO ≤ ±4.0 mV and IIB ≤ 1.0 µA at 25°C - ensuring functional integrity in geosynchronous orbit and deep-space missions.
Does the LM119 MDE require external pull-up resistors on its outputs?
Yes, the LM119 MDE features open-collector outputs that require external pull-up resistors to define logic-high voltage levels. Typical values range from 1 kΩ to 10 kΩ depending on load capacitance and rise-time requirements. The outputs can sink up to 25 mA each, enabling direct interface with TTL, DTL, or relay coils without additional driver stages.
Can the LM119 MDE operate from a single 5V supply?
Yes, the LM119 MDE is fully specified for single 5V operation with V+ = 5V and V− = 0V. In this configuration, input common-mode range is 1.0 V to 3.0 V, output saturation voltage is 0.4 V at 4.0 mA load, and response time remains competitive - enabling use in compact, low-power avionics subsystems without dual-rail generation.
How does the LM119 MDE differ from commercial-grade LM119 variants?
The LM119 MDE differs from commercial versions through QML-qualified screening, ELDRS-free process assurance, 100 krad(Si) TID rating, extended temperature operation (−55°C to +125°C), and diesale packaging for hybrid integration. Commercial LM119 parts lack radiation testing, have narrower temp ranges, and are not screened to MIL-STD-883 Group B requirements - making LM119 MDE unsuitable for non-hardened applications.
What thermal considerations apply to the LM119 MDE in bare-die form?
As a diesale part, the LM119 MDE has no defined θJA; thermal performance depends entirely on substrate material, die attach method, and heatsinking design. For reliable operation at maximum junction temperature (150°C), users must model thermal resistance from junction-to-substrate and ensure ambient + power × RθJA_total ≤ 150°C. TI recommends AuSn eutectic die attach and AlN or BeO substrates for high-power density layouts.
LM119 MDE Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Package/Case:
- Die
- 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:
- Surface Mount
- :
- Die
LM119 MDE FAQ
1.How can I place an order for LM119 MDE through Aetrix?
Please submit a Request for Quotation (RFQ) for LM119 MDE 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 LM119 MDE reliable?
The price and inventory of LM119 MDE are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM119 MDE is usually 5 days.
3.What payment methods are accepted for LM119 MDE?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM119 MDE transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM119 MDE?
LM119 MDE orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM119 MDE 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 LM119 MDE?
For technical support, including LM119 MDE datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM119 MDE requirements.
6.How does Aetrix verify that LM119 MDE is sourced from the original manufacturer or authorized distributors?
All LM119 MDE 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 LM119 MDE meets industry standards.
7.What is the process for return or replacement of LM119 MDE?
All LM119 MDE units undergo pre-shipment inspection (PSI). If there is an issue with LM119 MDE, 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 LM119 MDE part is unused and in its original packaging.
Return procedure for LM119 MDE:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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