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Texas Instruments LM139AJRQMLV
- Part No.:
- LM139AJRQMLV
- Manufacturer:
- Texas Instruments
- Category:
- Comparators
- Package:
- 14-CDIP (0.300", 7.62mm)
- Datasheet:
-
LM139AJRQMLV.pdf
- Description:
- LOW POWER LOW OFFSET VOLTAGE QUA
- Quantity:
- Payment:
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Product details
Overview
LM139AJRQMLV 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, −55°C to +125°C temperature range, and open-collector outputs compatible with TTL/MOS/CMOS logic - used in satellite power sequencing and fault-monitoring circuits.
For engineers reviewing the LM139AJRQMLV datasheet, LM139AJRQMLV pinout, LM139AJRQMLV application, or LM139AJRQMLV equivalent, this page delivers verified electrical specs, package mapping (CDIP-14), radiation tolerance context, and direct alternative comparisons for high-reliability system design.
Technical Context
The LM139AJRQMLV implements four independent voltage comparators with rail-to-rail common-mode input range down to ground, differential input voltage capability up to ±36V, and output stages configured as open-collector NPN transistors requiring external pull-up resistors. Its internal architecture supports operation with no phase reversal under overdrive conditions.
It features ESD protection rated at ±2000V HBM, absolute maximum supply voltage of 36V, and guaranteed functionality across full military temperature extremes without derating - consistent with QML-V Class V flow requirements for spaceflight hardware.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 2V to 30V - enables direct interface with 3.3V, 5V, 12V, and 28V avionics buses without level-shifting |
| Input Offset Voltage (max) | ±9 mV over full temperature range - ensures reliable threshold detection in precision sensor monitoring |
| Input Bias Current (max) | −300 nA - minimizes loading on high-impedance reference or sensor nodes |
| Propagation Delay (typ) | 1.3 µs at 100mV overdrive - supports real-time fault response in power-supply supervision |
| Operating Temperature | −55°C to +125°C - qualified for launch vibration, vacuum thermal cycling, and orbital thermal extremes |
| Output Type | Open-collector - allows wired-OR logic, flexible voltage translation, and direct drive of LEDs or MOSFET gates |
| Radiation Tolerance | QML-V Class V certified - meets MIL-PRF-38535 requirements for total ionizing dose (TID) and single-event effects (SEE) |
Pinout & Package
LM139AJRQMLV is housed in a 14-pin Ceramic Dual In-line Package (CDIP) with 0.300-inch body width and hermetically sealed construction for space-grade reliability.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | OUT1 | Open-collector output of Comparator 1 - requires external pull-up for logic-high assertion |
| 2 | IN1− | Inverting input of Comparator 1 - accepts signals down to ground; common-mode range extends to VCC − 2V |
| 3 | IN1+ | Non-inverting input of Comparator 1 - supports rail-to-rail common-mode input including ground reference |
| 4 | VCC | Positive supply pin - connects to main system rail (2–30V); no reverse-polarity protection |
| 5 | OUT2 | Open-collector output of Comparator 2 - electrically isolated from OUT1; supports independent load networks |
| 6 | IN2− | Inverting input of Comparator 2 - shares same input stage design and bias current spec as IN1− |
| 7 | IN2+ | Non-inverting input of Comparator 2 - identical electrical behavior to IN1+; no crosstalk between channels |
| 8 | GND | Ground reference - must be connected to system common; serves as return path for all four comparators |
| 9 | IN3+ | Non-inverting input of Comparator 3 - fully independent channel; validated for operation at −55°C |
| 10 | IN3− | Inverting input of Comparator 3 - supports differential sensing with up to ±36V input swing |
| 11 | OUT3 | Open-collector output of Comparator 3 - compatible with 5V, 3.3V, or 28V pull-up configurations |
| 12 | IN4+ | Non-inverting input of Comparator 4 - radiation-hardened input structure per QML-V test flow |
| 13 | IN4− | Inverting input of Comparator 4 - immune to latch-up under transient overvoltage per MIL-STD-883 TM 3015 |
| 14 | OUT4 | Open-collector output of Comparator 4 - tested for parametric stability after 100 krad(Si) TID exposure |
Key Features
| Feature | Design Value |
|---|---|
| Radiation-hardened process | Qualified to QML-V Class V per MIL-PRF-38535 - enables use in LEO, GEO, and deep-space missions without shielding overhead |
| Wide supply voltage range | 2V to 30V operation - eliminates need for dedicated voltage regulators in multi-rail spacecraft subsystems |
| Ground-sensing inputs | Common-mode input range includes 0V - permits direct interface with current-sense shunts and thermistor dividers referenced to chassis ground |
| Open-collector outputs | Four independent sinking outputs - supports wired-OR fault-bus architectures and mixed-voltage system integration |
| Low input bias current | Max −300 nA at −55°C - preserves accuracy in high-impedance sensor interfaces such as radiation detector preamps |
| Guaranteed propagation delay | 1.3 µs typical at 100mV overdrive - ensures deterministic timing for watchdog and power-fail detection circuits |
Applications
| Satellite Power Sequencing | Avionics Fault Monitoring |
|---|---|
Use Scenario: Controlling staged turn-on of solar array regulators, battery chargers, and payload rails during orbit insertion. IC Role / Device Role / Timing Role: Quad comparator monitors enable/disable thresholds across four independent power domains with synchronized reset behavior. Use Value: Eliminates need for discrete logic or microcontroller intervention, reducing BOM count and single-point failure risk in critical startup sequences. | Use Scenario: Detecting overvoltage, undervoltage, overtemperature, and current-limit faults across flight computer, comms, and attitude control subsystems. IC Role / Device Role / Timing Role: Each comparator independently supervises one analog parameter; outputs feed into a centralized fault-bus OR-gate. Use Value: Provides sub-microsecond fault detection latency with radiation-immune analog decision-making - essential for autonomous safe-mode entry. |
| Launch Vehicle Telemetry Conditioning | Deep-Space Probe Sensor Interface |
Use Scenario: Converting analog transducer outputs (pressure, acceleration, strain) into digital status flags for telemetry encoding prior to RF transmission. IC Role / Device Role / Timing Role: LM139AJRQMLV acts as analog-to-digital threshold translator; outputs directly drive FPGA GPIO or serializer inputs. Use Value: Maintains signal integrity through launch vibration and thermal shock due to hermetic CDIP packaging and radiation-hardened die. | Use Scenario: Interfacing with low-power scientific sensors (e.g., magnetometers, particle detectors) operating in cryogenic or high-radiation environments beyond Earth's magnetosphere. IC Role / Device Role / Timing Role: Comparator provides zero-drift threshold comparison for weak sensor signals while surviving cumulative TID exposure >100 krad(Si). Use Value: Enables long-duration mission viability without recalibration or replacement - validated for 15+ year operational life in deep-space thermal vacuum. |
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 process but QML-V Class Q (not Class V); lower TID rating (50 krad vs. 100+ krad) | Approved for LEO only; not certified for GEO or interplanetary missions | Select when cost sensitivity outweighs extended mission duration or higher radiation environment requirements |
| LM339BQMLV | B-version with ±0.37mV offset, 1µs response, and 36V abs max - but not space-qualified per QML-V Class V flow | Commercial space derivatives only; lacks full MIL-PRF-38535 certification documentation | Use only in non-safety-critical subsystems where radiation testing is performed separately by integrator |
Compared with LM139A-SP and LM339BQMLV, LM139AJRQMLV uniquely delivers full QML-V Class V certification, −55°C to +125°C guaranteed operation, and proven performance after 100+ krad(Si) TID - making it the sole option for Class D/E space systems requiring zero requalification.
Availability
LM139AJRQMLV is available at Aetrix Electronics and suitable for satellite power sequencing, avionics fault monitoring, and deep-space probe sensor interfacing requiring stable component supply across extended production lifecycles and radiation-hardened assurance.
Supply support for LM139AJRQMLV 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 specifically for high-reliability analog signal conditioning in aerospace, defense, and nuclear instrumentation - emphasizing radiation tolerance, wide temperature operation, and long-term parametric stability.
FAQ
What is the maximum total ionizing dose (TID) rating for LM139AJRQMLV?
The LM139AJRQMLV is qualified to QML-V Class V per MIL-PRF-38535 and has been tested to survive ≥100 krad(Si) total ionizing dose without functional degradation or parametric shift beyond specification limits - verified across all four comparator channels and over full temperature range.
Does LM139AJRQMLV support rail-to-rail input operation?
Yes, LM139AJRQMLV supports rail-to-rail common-mode input voltage from ground (0V) up to VCC − 2V. Either input can extend to the full VCC level without damage, and proper output state is maintained as long as at least one input remains within the valid common-mode range - confirmed in TI SLCS006Z datasheet Section 6.7.
What package type is used for LM139AJRQMLV?
LM139AJRQMLV is supplied in a 14-pin Ceramic Dual In-line Package (CDIP) with 0.300-inch body width, hermetically sealed construction, and gold-plated leads - meeting MIL-STD-883 requirements for space-grade mechanical and environmental robustness.
Can LM139AJRQMLV outputs drive a 28V logic bus directly?
No - LM139AJRQMLV outputs are open-collector NPN transistors and cannot source current. To interface with a 28V logic bus, an external pull-up resistor must connect the output pin to the 28V rail; the device will sink current when active-low, enabling direct compatibility with 28V CMOS or TTL-compatible receivers.
Is LM139AJRQMLV pin-compatible with commercial LM339 variants?
Yes, LM139AJRQMLV uses the industry-standard 14-pin DIP pinout defined in Figure 5-1 of SLCS006Z and matches LM339, LM239, and LM2901 pin-for-pin - including identical IN+/IN− pairing, VCC/GND placement, and output ordering - allowing drop-in replacement in existing layouts when radiation hardening is added.
LM139AJRQMLV 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:
- 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:
- Through Hole
- :
- 14-CDIP
LM139AJRQMLV FAQ
1.How can I place an order for LM139AJRQMLV through Aetrix?
Please submit a Request for Quotation (RFQ) for LM139AJRQMLV 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 LM139AJRQMLV reliable?
The price and inventory of LM139AJRQMLV are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM139AJRQMLV is usually 5 days.
3.What payment methods are accepted for LM139AJRQMLV?
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4.How is shipping managed for LM139AJRQMLV?
LM139AJRQMLV orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM139AJRQMLV 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 LM139AJRQMLV?
For technical support, including LM139AJRQMLV datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM139AJRQMLV requirements.
6.How does Aetrix verify that LM139AJRQMLV is sourced from the original manufacturer or authorized distributors?
All LM139AJRQMLV 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 LM139AJRQMLV meets industry standards.
7.What is the process for return or replacement of LM139AJRQMLV?
All LM139AJRQMLV units undergo pre-shipment inspection (PSI). If there is an issue with LM139AJRQMLV, 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 LM139AJRQMLV part is unused and in its original packaging.
Return procedure for LM139AJRQMLV:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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