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Texas Instruments LM139DRG4
- Part No.:
- LM139DRG4
- Manufacturer:
- Texas Instruments
- Category:
- Comparators
- Package:
- 14-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
LM139DRG4.pdf
- Description:
- IC COMPARATOR 4 DIFF 14SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:4,120
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Product details
Overview
LM139DRG4 from Texas Instruments is a quad differential comparator IC designed for precision voltage comparison in wide-supply industrial and aerospace systems. It operates from 2V to 30V, delivers ±9mV max input offset voltage (over temperature), supports common-mode input down to ground, and features open-collector outputs compatible with TTL/MOS/CMOS logic - used in motor drive overcurrent detection, power supply sequencing, and vacuum robot position sensing.
For engineers reviewing the LM139DRG4 datasheet, LM139DRG4 pinout, LM139DRG4 application, or LM139DRG4 equivalent, this page provides verified electrical specs, SOIC-14 package mapping, real-world use scenarios, and two confirmed alternative parts with documented functional and thermal differences.
Technical Context
The LM139DRG4 implements four independent comparators with rail-to-rail common-mode input range extending to ground and differential input capability up to ±36V. Its open-collector outputs require external pull-up resistors and support wired-OR logic configurations for multi-threshold monitoring.
It uses bipolar process technology, exhibits 1.3µs typical propagation delay under 100mV input step with 5mV overdrive, and maintains stable quiescent current (0.8–2mA) across 5V–30V supply and –55°C to +125°C operating range - enabling reliable operation in high-reliability analog signal conditioning stages.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 2 V to 30 V - supports single-supply operation in battery-backed or 24V industrial rails without level-shifting. |
| Input Offset Voltage (max) | ±9 mV over full temperature range - enables accurate threshold detection within ±1% of reference at 1V input span. |
| Common-Mode Input Range | 0 V to (VCC – 2 V) - allows direct sensing of signals referenced to ground, e.g., current-sense amplifier outputs. |
| Propagation Delay (typ) | 1.3 µs - sufficient for <769 kHz event response in overvoltage lockout or PWM fault detection circuits. |
| Output Type | Open-collector - permits flexible pull-up to higher voltage rail (e.g., 5V logic interfacing with 24V system monitoring). |
| Quiescent Current (4 comp) | 0.8–2 mA - enables low-power wake-up monitoring in always-on subsystems without significant standby drain. |
| Operating Temperature | –55°C to +125°C - qualified for aerospace, military, and extended-temperature industrial control environments. |
Pinout & Package
LM139DRG4 is packaged in 14-pin SOIC (D package), body size 8.70 mm × 3.90 mm, with standard JEDEC outline and surface-mount footprint.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | OUT1 | Comparator 1 output - open-collector; requires external pull-up for logic-high assertion. |
| 2 | IN1− | Inverting input of comparator 1 - accepts signal below reference for high-side trip detection. |
| 3 | IN1+ | Non-inverting input of comparator 1 - connects to reference or sensed voltage for threshold comparison. |
| 4 | VCC | Positive supply pin - powers all four comparators; decoupling capacitor recommended near pin. |
| 5 | OUT2 | Comparator 2 output - electrically identical to OUT1; supports independent or cascaded logic decisions. |
| 6 | IN2− | Inverting input of comparator 2 - used for dual-threshold or window-comparator configurations. |
| 7 | IN2+ | Non-inverting input of comparator 2 - pairs with IN2− to define second comparison boundary. |
| 8 | GND | Ground reference - return path for supply and input bias currents; must be low-impedance. |
| 9 | IN3− | Inverting input of comparator 3 - enables third independent voltage decision channel. |
| 10 | IN3+ | Non-inverting input of comparator 3 - supports redundant or multi-zone monitoring. |
| 11 | OUT3 | Comparator 3 output - shares same electrical behavior as OUT1/OUT2; no internal connection to other outputs. |
| 12 | IN4− | Inverting input of comparator 4 - completes quad-channel capability for complex state machines. |
| 13 | IN4+ | Non-inverting input of comparator 4 - used in applications like 4-level battery cell balancing or fault grading. |
| 14 | OUT4 | Comparator 4 output - fully isolated output node; supports independent load switching or LED drivers. |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail common-mode input | Operates with inputs down to ground and up to VCC − 2 V - eliminates need for input biasing networks in single-supply designs. |
| Open-collector outputs | Enable wired-OR logic, mixed-voltage interfacing (e.g., 3.3V logic controlling 24V loads), and simplified level translation. |
| Wide supply range (2–30 V) | Supports direct integration into 3.3V, 5V, 12V, and 24V systems without external regulators or LDOs. |
| –55°C to +125°C operation | Qualified for aerospace, defense, and extended-temperature industrial applications per MIL-PRF-38535 Class K. |
| Low input bias current (±100 nA max) | Minimizes loading error on high-impedance sources such as thermistor dividers or photodiode amplifiers. |
Applications
| Motor Drive Protection | Industrial Power Sequencing |
|---|---|
Use Scenario: Detect overcurrent in H-bridge phase legs using shunt voltage and shut down PWM before MOSFET failure. IC Role / Device Role / Timing Role: Quad comparator monitors four current-sense channels in parallel, triggering independent fault latches. Use Value: Enables sub-microsecond response to short-circuit events while maintaining isolation between drive phases. |
Use Scenario: Validate correct startup order of 5V, 3.3V, and 1.2V rails in programmable logic controllers before FPGA configuration. IC Role / Device Role / Timing Role: Each comparator verifies individual rail voltage exceeds its threshold before enabling next-stage regulator. Use Value: Prevents latch-up and configuration corruption by enforcing strict power-up sequence timing. |
| Vacuum Robot Position Sensing | Aerospace Battery Management |
Use Scenario: Monitor Hall-effect sensor outputs to detect end-of-travel limits and prevent mechanical collision in cleanroom vacuum robots. IC Role / Device Role / Timing Role: LM139DRG4 compares four analog position signals against fixed references to generate discrete limit flags. Use Value: Provides deterministic, noise-immune digital edge detection without microcontroller polling overhead. |
Use Scenario: Monitor individual cell voltages in a 24-cell Li-ion battery stack for overvoltage and undervoltage conditions. IC Role / Device Role / Timing Role: Four comparators supervise groups of six cells each, feeding OR-gated alerts to central BMS controller. Use Value: Delivers fail-safe, analog-domain cell protection independent of firmware execution or communication latency. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar quad comparator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM339DR | Wider temp range (0°C to 70°C), higher max offset (±9 mV), same SOIC-14 package and pinout. | Not rated for aerospace or extended-temp industrial use; suitable for commercial-grade power supplies. | Select LM339DR only when ambient temperature stays within 0–70°C and cost is prioritized over reliability margin. |
| LM2901DT | Extended temp range (–40°C to +125°C), lower max offset (±7 mV), TSSOP-14 package (5.0 × 4.4 mm). | Smaller footprint but requires re-layout; better performance in automotive engine control units. | Choose LM2901DT when board space is constrained and operating temperature exceeds 85°C. |
Compared with LM139DRG4, LM339DR trades temperature robustness for lower cost in benign environments, while LM2901DT offers improved offset and smaller size at the expense of PCB redesign - making LM139DRG4 optimal for legacy aerospace and high-reliability industrial designs requiring drop-in replacement and proven qualification history.
Availability
LM139DRG4 is available at Aetrix Electronics and suitable for motor drive protection, industrial power sequencing, and aerospace battery management requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for LM139DRG4 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 precision analog ICs and high-reliability components.
The LM139 series was developed for military and aerospace applications demanding wide temperature operation, radiation tolerance, and long-term parametric stability - forming the foundation for TI's high-reliability comparator product line.
FAQ
What is the maximum supply voltage rating for LM139DRG4?
The absolute maximum supply voltage for LM139DRG4 is 36 V, but the recommended operating range is 2 V to 30 V. Exceeding 30 V may degrade long-term reliability or violate specified electrical characteristics - always refer to Section 6.2 of the official LM139 datasheet for derating guidance. LM139DRG4 must not operate continuously above 30 V in production designs.
Does LM139DRG4 support rail-to-rail input operation?
LM139DRG4 supports common-mode input down to ground (0 V) and up to VCC − 2 V, but does not support true rail-to-rail input (i.e., it cannot accept inputs equal to VCC). However, one input may exceed VCC (up to 36 V) if the other remains within the valid common-mode range - a key feature enabling direct high-side sensing without attenuators. This behavior is explicitly defined in the LM139DRG4 datasheet Section 6.9.
Can LM139DRG4 outputs drive LEDs directly?
Yes - LM139DRG4 outputs are open-collector and can sink up to 20 mA per channel (per Absolute Maximum Ratings), making them suitable for direct LED driving with appropriate current-limiting resistors. For example, with a 5 V pull-up and red LED (VF ≈ 1.8 V), a 220 Ω resistor limits current to ~14.5 mA. Always verify VOL ≤ 400 mV at target sink current per LM139DRG4 Electrical Characteristics Table 6.9.
Is LM139DRG4 pin-compatible with LM339DR?
Yes - LM139DRG4 and LM339DR share identical SOIC-14 pinout, terminal functions, and electrical interface. Both follow the standard LM339 family pin configuration shown in Figure 5-1 of the datasheet. However, LM139DRG4 is specified for –55°C to +125°C operation, whereas LM339DR is rated only from 0°C to +70°C - so thermal validation is required before substitution in extended-temperature applications.
What is the typical propagation delay of LM139DRG4?
The typical propagation delay of LM139DRG4 is 1.3 µs under standard test conditions (100 mV input step, 5 mV overdrive, RL = 5.1 kΩ, CL = 15 pF, TA = 25°C), as specified in Section 6.12 of the LM139 datasheet. This value increases slightly at temperature extremes and with heavier capacitive loads - design margins should account for up to 2.5 µs delay in worst-case industrial environments.
LM139DRG4 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Package/Case:
- 14-SOIC (0.154", 3.90mm Width)
- Series:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Discontinued at Digi-Key
- Type:
- General Purpose
- Number of Elements:
- 4
- Output Type:
- Open-Collector, Open-Drain
- Voltage - Supply, Single/Dual (±):
- 2V ~ 30V, ±1V ~ 15V
- :
- 5mV @ 30V
- Voltage - Input Offset (Max):
- 0.1µA @ 5V
- Current - Input Bias (Max):
- 20mA
- Current - Output (Typ):
- 2mA
- Current - Quiescent (Max):
- -
- CMRR, PSRR (Typ):
- -
- Propagation Delay (Max):
- -
- Hysteresis:
- -55°C ~ 125°C
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- Surface Mount
- :
- 14-SOIC
LM139DRG4 FAQ
1.How can I place an order for LM139DRG4 through Aetrix?
Please submit a Request for Quotation (RFQ) for LM139DRG4 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 LM139DRG4 reliable?
The price and inventory of LM139DRG4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM139DRG4 is usually 5 days.
3.What payment methods are accepted for LM139DRG4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM139DRG4 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM139DRG4?
LM139DRG4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM139DRG4 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 LM139DRG4?
For technical support, including LM139DRG4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM139DRG4 requirements.
6.How does Aetrix verify that LM139DRG4 is sourced from the original manufacturer or authorized distributors?
All LM139DRG4 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 LM139DRG4 meets industry standards.
7.What is the process for return or replacement of LM139DRG4?
All LM139DRG4 units undergo pre-shipment inspection (PSI). If there is an issue with LM139DRG4, 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 LM139DRG4 part is unused and in its original packaging.
Return procedure for LM139DRG4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LM139DRG4 Tags
-
LM2903DR
Texas Instruments
-
LM339DR
Texas Instruments
-
LM339PWR
Texas Instruments
-
LM393DT
STMicroelectronics
-
LM2901PWR
Texas Instruments
-
LM2903DT
STMicroelectronics
-
LM393DR
Texas Instruments
-
LM239DR
Texas Instruments
-
LM339APWR
Texas Instruments
-
LM2903P
Texas Instruments
-
LM393ADR
Texas Instruments
-
NCX2200GMAZ
NXP Semiconductors
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