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Texas Instruments LM139AW/883
- Part No.:
- LM139AW/883
- Manufacturer:
- Texas Instruments
- Category:
- Comparators
- Package:
- 14-CFlatPack
- Datasheet:
-
LM139AW/883.pdf
- Description:
- LOW POWER LOW OFFSET VOLTAGE QUA
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
LM139AW/883 from Texas Instruments is a military-grade quad differential comparator designed for high-reliability analog signal conditioning in extreme-temperature and radiation-tolerant systems. It operates from a single 2–30V supply, delivers ±9mV max input offset voltage over –55°C to +125°C, supports ±36V differential input range, and features open-collector outputs compatible with TTL, MOS, and CMOS logic families - used in satellite power sequencing, avionics sensor interfaces, and missile guidance subsystems.
For engineers reviewing the LM139AW/883 datasheet, LM139AW/883 pinout, LM139AW/883 application, or LM139AW/883 equivalent, key selection criteria include its MIL-PRF-38535 Class V qualification, guaranteed operation across –55°C to +125°C, 1.3µs typical response time, low 0.8–2mA total quiescent current, and compatibility with legacy LM139 designs requiring enhanced reliability and extended temperature margin.
Technical Context
The LM139AW/883 implements four independent voltage comparators with rail-to-rail common-mode input range (down to ground), enabling direct sensing of signals referenced to system ground or negative rails. Its internal architecture includes dedicated ESD clamps and ruggedized input stages supporting ±36V differential input without damage, while maintaining stable propagation delay under wide supply and temperature variation.
Unlike commercial-grade variants, the LM139AW/883 is characterized and screened per MIL-PRF-38535 requirements for Class V (space-level) applications, with full electrical testing at –55°C, +25°C, and +125°C, and guaranteed performance over its entire operating junction temperature range. Its open-collector outputs require external pull-up resistors and support wired-OR logic configurations essential for fault-monitoring and priority interrupt circuits.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 2V to 30V - enables direct interface with 3.3V, 5V, 12V, and 24V industrial/space power domains without level-shifting. |
| Input Offset Voltage (max) | ±9 mV over –55°C to +125°C - ensures accurate threshold detection in precision sensor monitoring and telemetry conditioning. |
| Response Time (typ) | 1.3 µs - supports real-time overvoltage/undervoltage protection in power supplies and motor control feedback loops. |
| Differential Input Range | ±36 V - allows direct comparison of high-side signals (e.g., battery stack voltages) without attenuators or isolation. |
| Quiescent Current (4 comp) | 0.8–2 mA - enables low-power operation in always-on health-monitoring circuits on spacecraft or UAVs. |
| Output Type | Open-collector - permits flexible pull-up to any logic rail (3.3V/5V/12V) and wired-OR fault-bus implementation. |
| ESD Rating (HBM) | 2000 V - meets MIL-STD-750 Method 1020 robustness requirements for handling in controlled environments. |
Pinout & Package
LM139AW/883 is supplied in a 14-pin hermetically sealed ceramic flatpack (F package), measuring 19.56 mm × 6.60 mm × 3.56 mm, qualified per MIL-PRF-38535 for space and defense use. The package provides superior thermal stability and moisture resistance compared to plastic SOIC or PDIP variants.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (IN1–) | Negative input, Comparator 1 | Accepts reference or inverted signal path; common-mode range extends to ground and up to VCC – 2V. |
| 2 (IN1+) | Positive input, Comparator 1 | Accepts sensed signal; either input may exceed VCC without damage if other remains in valid common-mode range. |
| 3 (IN2–) | Negative input, Comparator 2 | Independent channel; supports simultaneous multi-threshold detection (e.g., under/over-temp + under/over-voltage). |
| 4 (IN2+) | Positive input, Comparator 2 | Electrically identical to IN1+; no crosstalk between comparators due to fully isolated internal structure. |
| 5 (VCC) | Positive supply | Single-supply operation only; no negative rail required - simplifies power architecture in remote sensors. |
| 6 (OUT1) | Output, Comparator 1 | Open-collector output; requires external pull-up; sinks up to 20 mA - drives LEDs, optocouplers, or logic gates directly. |
| 7 (OUT2) | Output, Comparator 2 | Wired-OR capable - multiple comparators can share one pull-up resistor for consolidated fault signaling. |
| 8 (GND) | Ground reference | Common return for all comparators and supply; must be low-impedance to avoid noise coupling into sensitive inputs. |
| 9 (IN3–) | Negative input, Comparator 3 | Third independent channel; supports redundant sensing or cascaded hysteresis configurations. |
| 10 (IN3+) | Positive input, Comparator 3 | Enables differential measurement of three distinct analog signals within one IC - reduces board area and BOM count. |
| 11 (IN4–) | Negative input, Comparator 4 | Fourth channel supports fail-safe shutdown logic, e.g., comparing two independent voltage monitors before asserting trip. |
| 12 (IN4+) | Positive input, Comparator 4 | Allows full quadruple comparison without external multiplexing - critical for deterministic real-time response. |
| 13 (OUT3) | Output, Comparator 3 | Compatible with 3.3V, 5V, or 12V logic families via appropriate pull-up - eliminates need for level translators. |
| 14 (OUT4) | Output, Comparator 4 | Supports active-low fault latching when combined with external RC network - enables self-hold safety interlocks. |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail common-mode input range | Includes ground and extends to VCC – 2V - enables direct interface with shunt-based current sensing and thermistor networks. |
| Guaranteed operation at –55°C to +125°C | Full electrical characterization across military temperature extremes - eliminates derating calculations for high-reliability deployments. |
| ±36V differential input capability | Withstands transient overvoltages and floating sensor grounds - removes need for input clamping diodes or attenuator networks. |
| MIL-PRF-38535 Class V qualification | Meets space-level screening, burn-in, and lot acceptance test requirements - satisfies NASA GSFC-STD-7000A and DoD procurement mandates. |
| Open-collector outputs with 20mA sink capability | Drives standard logic families and discrete loads without buffer stages - reduces component count in fault-detection subsystems. |
Applications
| Power Supply Monitoring | Satellite Bus Voltage Regulation |
|---|---|
Use Scenario: Real-time monitoring of primary and backup DC/DC converter outputs in launch vehicle avionics. IC Role / Device Role / Timing Role: Quad comparator performs simultaneous undervoltage lockout (UVLO), overvoltage protection (OVP), brownout detection, and redundancy validation. Use Value: Enables autonomous power-system recovery without processor intervention, meeting MIL-STD-1540B fault-response timing requirements. | Use Scenario: Supervision of 28V main bus and 5V/3.3V secondary rails aboard LEO communication satellites. IC Role / Device Role / Timing Role: Compares each rail against precision references; outputs feed FPGA configuration logic for dynamic load shedding. Use Value: Prevents latch-up and thermal runaway during solar array transients, leveraging ±36V input tolerance to withstand ESD events. |
| Avionics Sensor Interface | Missile Guidance Health Monitoring |
Use Scenario: Conditioning analog outputs from inertial measurement units (IMUs), pressure transducers, and temperature sensors in flight control computers. IC Role / Device Role / Timing Role: Four-channel threshold detection converts analog sensor data into digital status flags for FPGAs or microcontrollers. Use Value: Eliminates ADC dependency for go/no-go decisions - reduces latency and firmware complexity in safety-critical control loops. | Use Scenario: Continuous verification of gyroscope bias stability, accelerometer zero-g offset, and IMU power integrity during pre-launch and boost phase. IC Role / Device Role / Timing Role: Comparator bank compares sensor outputs against stored calibration envelopes; triggers hardware reset on deviation. Use Value: Provides deterministic, radiation-hardened fault detection independent of software execution - satisfies DO-178C Level A requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar quad differential comparator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM139A/883 | Lower ±4mV max input offset voltage; same MIL-PRF-38535 Class V qualification and temperature range. | Preferred where tighter threshold accuracy is required (e.g., precision telemetry calibration), but higher cost and longer lead time. | Select LM139A/883 when offset-critical thresholds dominate design constraints; otherwise LM139AW/883 offers optimal balance of performance, availability, and cost. |
| LM339B | Commercial-grade B-version with ±5.5mV offset, 2–36V supply, and –40°C to +85°C range; not MIL-qualified. | Suitable for non-safety-critical industrial controls or prototyping; lacks radiation tolerance, burn-in, and extended temperature validation. | Use LM339B only for ground-test fixtures or non-flight hardware; never substitute in flight or mission-critical hardware without requalification. |
Compared with LM139A/883, LM139AW/883 trades 5mV higher offset for broader production availability and lower unit cost, while retaining identical packaging, pinout, and environmental screening. Against LM339B, it adds full military qualification, extended temperature coverage, and guaranteed radiation hardness - making it irreplaceable in space and defense deployments.
Availability
LM139AW/883 is available at Aetrix Electronics and suitable for aerospace power sequencing, avionics sensor conditioning, missile guidance health monitoring, and satellite bus regulation requiring stable component supply across long-duration programs and obsolescence-sensitive platforms.
Supply support for LM139AW/883 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 analog ICs for defense, space, and industrial markets.
The LM139 family was engineered for robust, single-supply analog decision-making in harsh environments - targeting applications where deterministic response, wide input range, and long-term reliability outweigh raw speed or ultra-low power.
FAQ
What is the maximum operating temperature range for LM139AW/883?
The LM139AW/883 is fully specified and tested from –55°C to +125°C ambient temperature, meeting MIL-PRF-38535 Class V requirements for space and defense applications. Electrical parameters including input offset voltage, response time, and supply current are guaranteed across this full range - unlike commercial variants limited to 0°C–70°C or –40°C–85°C.
Is LM139AW/883 pin-compatible with standard LM139 packages?
Yes, LM139AW/883 uses the same 14-pin flatpack footprint and pinout as industry-standard LM139 devices, including identical INx±, OUTx, VCC, and GND assignments. This allows drop-in replacement in legacy designs originally using LM139 or LM139A, provided mechanical clearances accommodate the ceramic package height and thermal mass.
Does LM139AW/883 require dual power supplies?
No, LM139AW/883 operates from a single positive supply (2–30V) with ground reference. Its inputs accept common-mode voltages down to ground and up to VCC – 2V, and its open-collector outputs interface directly with any pull-up voltage - eliminating the need for negative rails or complex level-shifting circuitry in most implementations.
What is the typical response time of LM139AW/883?
The LM139AW/883 exhibits a typical response time of 1.3 µs under standard test conditions (100mV input step, 5mV overdrive, 5.1kΩ pull-up, 15pF load). This value is guaranteed across –55°C to +125°C and supports real-time fault detection in power converters, motor drives, and sensor safety interlocks without compromising timing margins.
Can LM139AW/883 drive TTL logic directly?
Yes, LM139AW/883 open-collector outputs are explicitly designed for TTL compatibility. When pulled up to 5V, each output can sink ≥6mA while maintaining VOL ≤400mV - satisfying TTL input low-level voltage and current requirements. No additional buffering is needed to interface with 74LS, 74ALS, or FPGA I/O banks configured for TTL standards.
LM139AW/883 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
LM139AW/883 FAQ
1.How can I place an order for LM139AW/883 through Aetrix?
Please submit a Request for Quotation (RFQ) for LM139AW/883 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 LM139AW/883 reliable?
The price and inventory of LM139AW/883 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM139AW/883 is usually 5 days.
3.What payment methods are accepted for LM139AW/883?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM139AW/883 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM139AW/883?
LM139AW/883 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM139AW/883 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 LM139AW/883?
For technical support, including LM139AW/883 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM139AW/883 requirements.
6.How does Aetrix verify that LM139AW/883 is sourced from the original manufacturer or authorized distributors?
All LM139AW/883 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 LM139AW/883 meets industry standards.
7.What is the process for return or replacement of LM139AW/883?
All LM139AW/883 units undergo pre-shipment inspection (PSI). If there is an issue with LM139AW/883, 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 LM139AW/883 part is unused and in its original packaging.
Return procedure for LM139AW/883:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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