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Texas Instruments LM139AWRLQMLV
- Part No.:
- LM139AWRLQMLV
- Manufacturer:
- Texas Instruments
- Category:
- Comparators
- Package:
- 14-CFlatPack
- Datasheet:
-
LM139AWRLQMLV.pdf
- Description:
- LOW POWER LOW OFFSET VOLTAGE QUA
- Quantity:
- Payment:
- Shipping:
Inventory:1,767
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Product details
Overview
LM139AWRLQMLV from Texas Instruments is a radiation-hardened quad differential comparator designed for space-grade applications, operating from a single 2–30V supply with ±9mV max input offset voltage, 1.3µs typical response time, and –55°C to +125°C temperature range. It performs voltage-level comparison in satellite power sequencing, fault detection, and telemetry conditioning circuits.
For engineers reviewing the LM139AWRLQMLV datasheet, LM139AWRLQMLV pinout, LM139AWRLQMLV application, or LM139AWRLQMLV equivalent, this page delivers verified electrical specs, radiation tolerance context, space-qualified package details, and direct alternatives for high-reliability analog signal conditioning.
Technical Context
The LM139AWRLQMLV implements four independent open-collector comparators with rail-to-rail common-mode input range (down to ground), differential input voltage capability up to ±36V, and output compatible with TTL, MOS, and CMOS logic families. Its architecture supports single-supply operation without requiring dual rails or level-shifting circuitry.
Designed for radiation environments, it features enhanced latch-up immunity and total ionizing dose (TID) tolerance per MIL-PRF-38535 QML-V requirements. Input bias current remains ≤–300nA over full temperature range, enabling high-impedance sensor interface use without significant loading error.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage | 2 V to 30 V - Supports wide-input industrial and spacecraft bus voltages without external regulation |
| Input Offset Voltage (max) | ±9 mV - Enables accurate threshold detection at low differential signals (e.g., <100mV sensor outputs) |
| Response Time (typ) | 1.3 µs - Sufficient for real-time overvoltage/undervoltage monitoring in power systems |
| Operating Temperature | –55°C to +125°C - Qualified for extreme thermal cycling in orbital and launch environments |
| Input Bias Current (max) | –300 nA - Allows direct connection to high-Z sources like thermocouples or photodiodes |
| Output Type | Open-collector - Permits wired-OR logic, flexible pull-up selection, and mixed-voltage interfacing |
| Common-Mode Range | 0 V to (VCC – 1.5 V) - Accepts inputs referenced to ground while powered from positive rail only |
Pinout & Package
LM139AWRLQMLV is housed in a 14-pin ceramic flatpack (WRL) package measuring 19.3 mm × 6.4 mm × 3.3 mm, qualified per MIL-STD-883 and screened to QML-V Class V standards for spaceflight use.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (IN1–) | Negative input of comparator 1 | Accepts reference or inverted signal path; common-mode range extends to ground |
| 2 (IN1+) | Positive input of comparator 1 | Accepts sensed voltage; both inputs tolerate up to VCC without damage |
| 3 (IN2–) | Negative input of comparator 2 | Independent channel; no internal coupling between comparators |
| 4 (IN2+) | Positive input of comparator 2 | Supports differential sensing configuration with matched trace routing |
| 5 (VCC) | Positive supply | Single rail input; quiescent current independent of supply voltage |
| 6 (OUT1) | Output of comparator 1 | Open-collector - requires external pull-up; sinks up to 20 mA |
| 7 (OUT2) | Output of comparator 2 | Compatible with 3.3V/5V/12V logic families via appropriate pull-up resistor |
| 8 (GND) | Ground reference | Return path for all comparators; must be low-impedance for noise immunity |
| 9 (IN3–) | Negative input of comparator 3 | Enables triple-threshold monitoring (e.g., UV/OV/fault) in one device |
| 10 (IN3+) | Positive input of comparator 3 | Configurable as window comparator input when paired with IN4± |
| 11 (IN4–) | Negative input of comparator 4 | Supports redundant sensing or multi-zone thermal monitoring |
| 12 (IN4+) | Positive input of comparator 4 | Allows independent control of four discrete decision points |
| 13 (OUT3) | Output of comparator 3 | Electrically isolated output node; no crosstalk with other channels |
| 14 (OUT4) | Output of comparator 4 | Enables parallel status reporting across subsystems (e.g., battery, solar, bus) |
Key Features
| Feature | Design Value |
|---|---|
| Radiation-hardened construction | Qualified to 100 krad(Si) TID and SEL immune per MIL-PRF-38535 QML-V |
| Extended temperature operation | Functional across –55°C to +125°C without derating or external heating/cooling |
| Single-supply compatibility | Operates from 2V to 30V with inputs referenced to ground - eliminates need for negative rail |
| High input voltage tolerance | Differential input range of ±36V enables direct interface with unregulated power buses |
| Low power consumption | 0.8–2 mA total supply current - suitable for battery-backed or low-power telemetry systems |
Applications
| Power Sequencing Control | Fault Detection & Latching |
|---|---|
Use Scenario: Monitoring multiple DC/DC converter outputs during satellite startup to ensure correct turn-on order and voltage stability before enabling downstream loads. IC Role / Device Role / Timing Role: Quad comparator provides independent enable signals for sequenced power domains using resistor-divider thresholds. Use Value: Prevents system lockup due to out-of-spec rail sequencing; eliminates need for discrete logic or microcontroller intervention. | Use Scenario: Detecting overcurrent, overtemperature, or undervoltage conditions in a radiation-tolerant motor controller for planetary rovers. IC Role / Device Role / Timing Role: Comparator outputs drive SR latches to hold fault state until reset, ensuring persistent alert during intermittent events. Use Value: Provides fail-safe, non-volatile fault capture without software dependency or memory corruption risk. |
| Telemetry Signal Conditioning | Satellite Bus Voltage Monitoring |
Use Scenario: Converting analog sensor outputs (e.g., thermistor, pressure transducer) into digital status bits for downlink telemetry framing. IC Role / Device Role / Timing Role: Each comparator digitizes one analog channel against programmable reference voltages. Use Value: Reduces ADC channel count and firmware complexity while maintaining deterministic latency (<1.3 µs). | Use Scenario: Continuous monitoring of primary and backup power buses in LEO communication satellites to trigger switchover upon degradation. IC Role / Device Role / Timing Role: Four comparators track VBUS, VBACKUP, VBAT, and VREF simultaneously with hysteresis-enabled thresholds. Use Value: Enables autonomous bus management with sub-millisecond response - critical for uninterrupted payload operation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar quad comparator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM139A-SP | Same radiation-hardened spec, but rated to 100 krad(Si); higher screening grade (Class V vs Class Q) | Required for NASA Class B/C missions with stricter TID margins | Select LM139A-SP when mission TID requirement exceeds 50 krad(Si) or SEL testing is mandated |
| LM339B | Commercial-grade B-version: lower offset (±0.37mV), faster response (1µs), wider supply (2–36V), but not radiation-hardened | Applicable only in terrestrial or low-earth orbit non-critical subsystems | Choose LM339B for cost-sensitive ground test equipment or non-flight prototypes needing improved speed/accuracy |
Compared with LM139AWRLQMLV, LM139A-SP offers higher radiation assurance for deep-space missions, while LM339B delivers superior electrical performance in benign environments - neither is pin-compatible without layout revision due to differing package types (ceramic flatpack vs SOIC/TSSOP).
Availability
LM139AWRLQMLV is available at Aetrix Electronics and suitable for satellite power management, radiation-tolerant telemetry systems, and spacecraft fault protection requiring stable component supply across extended production lifecycles and obsolescence transitions.
Supply support for LM139AWRLQMLV 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 space-grade component development.
The LM139 family was engineered for high-reliability analog signal comparison in mission-critical aerospace systems, emphasizing radiation tolerance, wide temperature operation, and single-supply flexibility.
FAQ
What is the maximum total ionizing dose (TID) rating for LM139AWRLQMLV?
The LM139AWRLQMLV is qualified to 100 krad(Si) total ionizing dose per MIL-PRF-38535 QML-V Class V requirements. This rating ensures functional integrity after prolonged exposure to trapped proton and electron radiation in low-Earth and geosynchronous orbits. The LM139AWRLQMLV maintains specified offset voltage, propagation delay, and output drive capability throughout its rated TID envelope.
Does LM139AWRLQMLV support rail-to-rail input operation?
No, LM139AWRLQMLV does not support true rail-to-rail input operation. Its common-mode input voltage range extends from ground (0 V) to (VCC – 1.5 V) at 25°C, and to (VCC – 2.0 V) over full temperature range. However, either input may exceed VCC without damage, enabling one-sided overvoltage tolerance - a key feature for bus monitoring applications where sensed signals may transiently exceed supply rails.
Can LM139AWRLQMLV be used with a 3.3V supply?
Yes, LM139AWRLQMLV operates reliably from 2 V to 30 V, including 3.3 V nominal supplies. At 3.3 V, its typical input offset voltage remains ≤±9 mV, and output saturation voltage stays below 700 mV at 4 mA sink current. The device's quiescent current is ~0.8–2 mA across this range, making it suitable for low-voltage telemetry interfaces where power budget is constrained.
What is the purpose of the NC pins on LM139AWRLQMLV?
LM139AWRLQMLV has no NC (No Connect) pins. All 14 pins are electrically assigned per the standard LM139 pinout: four input pairs, four open-collector outputs, one VCC, and one GND. The WRL ceramic flatpack package follows the same functional mapping as PDIP and SOIC variants - confirming that every pin serves an active role in comparator operation or power distribution.
How does LM139AWRLQMLV differ from commercial LM339B in terms of ESD robustness?
LM139AWRLQMLV specifies HBM ESD rating per MIL-STD-883 Method 3015.8, with qualification testing performed at ≥2 kV - consistent with baseline LM339B. However, LM139AWRLQMLV undergoes additional screening including burn-in, hermeticity testing, and radiation lot acceptance tests not applied to LM339B. Its ESD protection structure is hardened for handling in cleanroom and flight assembly environments, whereas LM339B targets standard industrial ESD control protocols.
LM139AWRLQMLV Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Package/Case:
- 14-CFlatPack
- Series:
- -
- Packaging:
- Tube
- Product Status:
- Active
- Type:
- General Purpose
- Number of Elements:
- 4
- Output Type:
- Open-Collector, Open-Drain
- Voltage - Supply, Single/Dual (±):
- 5V ~ 30V, ±2.5V ~ 15V
- :
- 2mV @ 30V
- Voltage - Input Offset (Max):
- 1000pA @ 5V
- Current - Input Bias (Max):
- 20mA
- Current - Output (Typ):
- 2mA
- Current - Quiescent (Max):
- 70dB CMRR, 60dB PSRR
- CMRR, PSRR (Typ):
- 1.3µs (Typ)
- Propagation Delay (Max):
- 10mV
- Hysteresis:
- -55°C ~ 125°C
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- Surface Mount
- :
- 14-CFP
LM139AWRLQMLV FAQ
1.How can I place an order for LM139AWRLQMLV through Aetrix?
Please submit a Request for Quotation (RFQ) for LM139AWRLQMLV 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 LM139AWRLQMLV reliable?
The price and inventory of LM139AWRLQMLV are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM139AWRLQMLV is usually 5 days.
3.What payment methods are accepted for LM139AWRLQMLV?
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4.How is shipping managed for LM139AWRLQMLV?
LM139AWRLQMLV orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM139AWRLQMLV 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 LM139AWRLQMLV?
For technical support, including LM139AWRLQMLV datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM139AWRLQMLV requirements.
6.How does Aetrix verify that LM139AWRLQMLV is sourced from the original manufacturer or authorized distributors?
All LM139AWRLQMLV 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 LM139AWRLQMLV meets industry standards.
7.What is the process for return or replacement of LM139AWRLQMLV?
All LM139AWRLQMLV units undergo pre-shipment inspection (PSI). If there is an issue with LM139AWRLQMLV, 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 LM139AWRLQMLV part is unused and in its original packaging.
Return procedure for LM139AWRLQMLV:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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