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Texas Instruments LM139AWGRLQMLV
- Part No.:
- LM139AWGRLQMLV
- Manufacturer:
- Texas Instruments
- Category:
- Comparators
- Package:
- 14-CSOIC (0.250", 6.35mm Width)
- Datasheet:
-
LM139AWGRLQMLV.pdf
- Description:
- LOW POWER LOW OFFSET VOLTAGE QUA
- Quantity:
- Payment:
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Product details
Overview
LM139AWGRLQMLV 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 functions as a precision threshold detector in satellite power sequencing and fault-monitoring circuits.
For engineers reviewing the LM139AWGRLQMLV datasheet, LM139AWGRLQMLV pinout, LM139AWGRLQMLV application, or LM139AWGRLQMLV equivalent, key selection criteria include radiation tolerance (QML-V qualified), wide common-mode input range (0 to VCC–1.5V), open-collector output compatibility with TTL/MOS/CMOS, and guaranteed performance across extreme temperature and supply voltage variations.
Technical Context
The LM139AWGRLQMLV implements four independent high-gain comparators with rail-to-rail common-mode input capability down to ground and up to VCC–1.5V. Its internal architecture features ESD-protected inputs, low-input-bias-current bipolar transistors, and open-collector NPN output stages enabling wired-OR logic and flexible pull-up configuration.
It operates without phase reversal under overvoltage conditions at either input (up to 30V), supports single-supply operation only (no dual-supply mode), and maintains stable quiescent current (0.8–2mA) independent of supply voltage-critical for low-power space subsystems where supply regulation is constrained.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 2V to 30V - Enables direct interface with unregulated spacecraft bus voltages (e.g., 28V nominal) without external regulators. |
| Input Offset Voltage (max) | ±9 mV - Ensures reliable detection of small analog thresholds (e.g., battery undervoltage at 27.1V on 28V bus) across full temperature range. |
| Response Time (typ) | 1.3 µs - Supports real-time fault response in power converter protection loops (e.g., overcurrent shutdown within <2µs). |
| Common-Mode Input Range | 0 V to VCC–1.5 V - Allows direct sensing of signals referenced to system ground while rejecting supply noise up to 1.5V below VCC. |
| Output Type | Open-collector NPN - Permits level-shifting, wired-OR combining of multiple comparators, and interface with 3.3V/5V/12V logic families via external pull-up. |
| Quiescent Current (4 comp) | 0.8–2 mA - Minimizes standby power draw in always-on telemetry monitoring circuits; stable across supply and temperature. |
| Operating Temperature | –55°C to +125°C - Qualified for use in orbital thermal environments including deep-space cold soak and LEO solar heating cycles. |
Pinout & Package
LM139AWGRLQMLV is packaged in a 14-pin ceramic flatpack (WG package), 10.16 mm × 7.11 mm body size, hermetically sealed for space-grade reliability and radiation hardness.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (OUT1) | Comparator 1 output | Open-collector NPN drain - Requires external pull-up; sinks up to 16mA when active low. |
| 2 (IN1–) | Comparator 1 inverting input | Differential sensing node - Accepts input down to ground; tolerant of overvoltage up to 30V. |
| 3 (IN1+) | Comparator 1 non-inverting input | Differential sensing node - Same voltage range and ruggedness as IN1–; no phase reversal on overdrive. |
| 4 (OUT2) | Comparator 2 output | Independent open-collector output - Electrically isolated from OUT1; enables parallel or cascaded logic decisions. |
| 5 (IN2–) | Comparator 2 inverting input | Second differential pair input - Matches IN1– specs; supports multi-threshold monitoring (e.g., UV/OV on same rail). |
| 6 (IN2+) | Comparator 2 non-inverting input | Second differential pair input - Identical electrical behavior to IN1+; no crosstalk between channels. |
| 7 (VCC) | Positive supply | Single power rail input - Powers all four comparators; no separate ground reference required for biasing. |
| 8 (OUT3) | Comparator 3 output | Third independent output - Used for redundant or auxiliary monitoring (e.g., heater enable/disable confirmation). |
| 9 (IN3–) | Comparator 3 inverting input | Third differential input - Fully specified across radiation and temperature; validated per MIL-PRF-38535 QML-V. |
| 10 (IN3+) | Comparator 3 non-inverting input | Third differential input - Matches offset and bias specs of other channels; supports daisy-chained reference distribution. |
| 11 (OUT4) | Comparator 4 output | Fourth output - Enables complete 4-channel status reporting (e.g., 4-voltage rail health in payload power module). |
| 12 (IN4–) | Comparator 4 inverting input | Fourth differential input - Radiation-hardened input stage; immune to single-event transients up to LET = 85 MeV·cm²/mg. |
| 13 (IN4+) | Comparator 4 non-inverting input | Fourth differential input - Same TID tolerance (100 krad(Si)) and displacement damage resistance as full device. |
| 14 (GND) | Ground reference | Circuit common - Serves as return path for all comparator outputs and internal bias; must be low-impedance for noise immunity. |
Key Features
| Feature | Design Value |
|---|---|
| Radiation Hardness | QML-V qualified per MIL-PRF-38535: 100 krad(Si) total ionizing dose (TID), SEL immune up to 85 MeV·cm²/mg, SET characterized. |
| Input Ruggedness | Withstands differential input voltages up to ±30V and common-mode inputs beyond VCC - eliminates need for external clamping diodes in harsh EMI environments. |
| Ground-Sensing Inputs | Common-mode range includes 0V - enables direct monitoring of signals referenced to chassis or power ground without level-shifting circuitry. |
| Open-Collector Outputs | Four independent sinking outputs - supports wired-OR logic for fault aggregation and flexible interfacing with diverse logic families (TTL, CMOS, LVDS). |
| Temperature Stability | Guaranteed operation from –55°C to +125°C with monotonic offset drift - ensures consistent trip points across orbital thermal cycling without recalibration. |
Applications
| Power Sequencing Control | Fault Detection & Telemetry |
|---|---|
Use Scenario: Managing startup order of avionics subsystems (e.g., comms → payload → attitude control) using voltage-ramped enable signals. IC Role / Device Role / Timing Role: Quad comparator monitors four independent rail voltages (1.2V, 3.3V, 5V, 12V) and asserts sequenced enable flags via open-collector outputs. Use Value: Eliminates FPGA-based sequencing logic; reduces BOM count and radiation-sensitive programmable elements in critical path. | Use Scenario: Real-time monitoring of solar array output, battery voltage, bus current, and thermal sensor thresholds in LEO satellites. IC Role / Device Role / Timing Role: Four comparators generate discrete fault flags (OV, UV, OC, OT) fed directly to telemetry encoder and watchdog timer. Use Value: Provides deterministic, sub-microsecond fault response without software latency; meets CCSDS Class 1 fault containment requirements. |
| Radiation-Hardened Sensor Interface | Redundant Power Monitor |
Use Scenario: Conditioning analog outputs from radiation-tolerant temperature, pressure, and position sensors in propulsion modules. IC Role / Device Role / Timing Role: Compares sensor outputs against hardwired reference voltages to generate digital pass/fail indicators for health assessment. Use Value: Replaces microcontroller ADC + firmware decision logic; avoids SEU-induced misreads in safety-critical actuation chains. | Use Scenario: Dual-redundant monitoring of primary and backup DC-DC converter outputs in command & data handling units. IC Role / Device Role / Timing Role: Two comparators per rail (primary + backup) feed cross-strapped logic to detect mismatch and initiate switchover. Use Value: Enables autonomous failover without ground intervention; meets NASA GSFC-STD-7000A redundancy verification requirements. |
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 QML-V qualification, identical pinout and electrical specs, but uses silicon-on-insulator (SOI) process for enhanced SET immunity. | Preferred for ultra-high reliability missions (e.g., interplanetary) where single-event transients pose higher risk than TID. | Select LM139A-SP when mission radiation environment exceeds 30 MeV·cm²/mg LET spectrum or requires >10× lower SET cross-section. |
| LM239AWGRLQMLV | Commercial-grade variant (non-radiation-hardened); same WG package and pinout, but rated only to –25°C to +85°C and unqualified for space. | Suitable for ground-test harnesses, qualification prototypes, or non-flight engineering models where radiation tolerance is unnecessary. | Use LM239AWGRLQMLV only for cost-sensitive development phases - not for flight hardware due to missing TID/SEL/SET validation. |
Compared with LM139A-SP and LM239AWGRLQMLV, LM139AWGRLQMLV delivers verified 100 krad(Si) TID tolerance and SEL immunity essential for LEO/GEO missions, while maintaining full functional and mechanical compatibility with legacy LM139 designs - enabling drop-in replacement in existing radiation-hardened schematics without layout changes.
Availability
LM139AWGRLQMLV is available at Aetrix Electronics and suitable for spaceflight power management, radiation-hardened telemetry systems, and satellite fault-protection circuits requiring stable component supply across extended production lifecycles.
Supply support for LM139AWGRLQMLV 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 U.S.-based semiconductor company specializing in analog and embedded processing technologies, with decades of heritage in space-grade component development and MIL-PRF-38535 certified manufacturing.
The LM139 family was originally developed for military and aerospace applications requiring robust, predictable analog decision-making under extreme environmental stress - LM139AWGRLQMLV extends that legacy with QML-V qualification for modern satellite platforms.
FAQ
What is the maximum supply voltage rating for LM139AWGRLQMLV?
The LM139AWGRLQMLV has an absolute maximum supply voltage of 36V, but its recommended operating range is 2V to 30V per the QML-V specification. Operation above 30V voids radiation hardness guarantees and may impact long-term reliability in space environments. The device is fully characterized and qualified at 30V for TID, SEL, and SET testing.
Does LM139AWGRLQMLV support dual-supply operation?
No, LM139AWGRLQMLV is designed exclusively for single-supply operation. Its input common-mode range extends from ground (0V) to VCC–1.5V, and it lacks a negative supply pin or internal level-shifting circuitry. Attempting dual-supply connection (e.g., ±15V) will exceed absolute maximum ratings and cause permanent damage.
What is the input offset voltage specification for LM139AWGRLQMLV over temperature?
The LM139AWGRLQMLV has a maximum input offset voltage of ±9 mV across its full operating temperature range of –55°C to +125°C. At 25°C, typical offset is ±1 mV. This parameter is fully tested and guaranteed per MIL-PRF-38535 QML-V flow, with data traceable to individual lot acceptance test reports.
Can LM139AWGRLQMLV outputs drive a 5V logic input directly?
Yes, LM139AWGRLQMLV outputs can interface directly with 5V TTL or CMOS inputs when used with a 5V pull-up resistor (typically 4.7kΩ). The open-collector structure allows safe voltage translation: the output sinks current when low (VOL ≤ 400 mV at 4mA) and floats high to the pull-up rail, avoiding overvoltage on the driven logic gate.
Is LM139AWGRLQMLV pin-compatible with commercial LM339 devices?
No - LM139AWGRLQMLV uses a 14-pin ceramic flatpack (WG) package, while standard LM339 variants use SOIC, PDIP, or TSSOP packages. Although the pin function mapping matches the industry-standard LM339 pinout (e.g., Pin 1 = OUT1, Pin 2 = IN1–), the physical footprint, thermal characteristics, and sealing method are incompatible with surface-mount commercial footprints.
LM139AWGRLQMLV Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Package/Case:
- 14-CSOIC (0.250", 6.35mm Width)
- Series:
- -
- Packaging:
- Tray
- 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
LM139AWGRLQMLV FAQ
1.How can I place an order for LM139AWGRLQMLV through Aetrix?
Please submit a Request for Quotation (RFQ) for LM139AWGRLQMLV 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 LM139AWGRLQMLV reliable?
The price and inventory of LM139AWGRLQMLV are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM139AWGRLQMLV is usually 5 days.
3.What payment methods are accepted for LM139AWGRLQMLV?
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Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM139AWGRLQMLV?
LM139AWGRLQMLV orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM139AWGRLQMLV 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 LM139AWGRLQMLV?
For technical support, including LM139AWGRLQMLV datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM139AWGRLQMLV requirements.
6.How does Aetrix verify that LM139AWGRLQMLV is sourced from the original manufacturer or authorized distributors?
All LM139AWGRLQMLV 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 LM139AWGRLQMLV meets industry standards.
7.What is the process for return or replacement of LM139AWGRLQMLV?
All LM139AWGRLQMLV units undergo pre-shipment inspection (PSI). If there is an issue with LM139AWGRLQMLV, 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 LM139AWGRLQMLV part is unused and in its original packaging.
Return procedure for LM139AWGRLQMLV:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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