LM139AJ/PB Texas Instruments Integrated Circuit (Ceramic Dual-In-Line Packages) In Stock
The LM139AJ/PB is a quad low-power comparator from Texas Instruments with low offset voltage (5 mV max) and 0.3 µA bias current, featuring open-collector outputs for flexible logic interfacing. It operates from a single or dual supply and is housed in a ceramic 14-pin DIP for high-reliability industrial applications. Available with lead-free RoHS compliant terminal finish.
- Manufacturer
- Texas Instruments
- Package
- Ceramic Dual-In-Line Packages
- Pin Count
- 14
- Lifecycle
- ACTIVE
- Datasheet
- LM139AJ/PB Datasheet PDF
- Category
- Integrated Circuit
- Temp Range
- -55.0°C to 125.0°C
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
Key Features
- Quad channel comparator: four independent comparators in a single 14-pin ceramic DIP
- Low input offset voltage of 5 mV max for accurate threshold comparison
- Ultra-low bias current of 0.3 µA enabling high-impedance source interfacing
- Open-collector outputs supporting wired-AND and flexible voltage level interfacing
- Single or dual supply operation covering a wide range of system configurations
Applications
The LM139AJ/PB is used in battery voltage monitoring, window comparator circuits, and zero-crossing detectors in industrial instrumentation and power management designs. Its low power consumption and open-collector outputs make it ideal for multi-threshold detection in battery management systems, temperature sensor interfaces, and alarm circuits where multiple voltage windows must be simultaneously monitored.
Specifications
| Pbfree Code | Yes |
| Date Of Intro | 1988-04-01 |
| YTEOL | 15 |
| Amplifier Type | COMPARATOR |
| Average Bias Current-Max (IIB) | 0.3 µA |
| Bias Current-Max (IIB) @25C | 0.3 µA |
| Input Offset Voltage-Max | 5000 µV |
| JESD-30 Code | R-GDIP-T14 |
| JESD-609 Code | e0 |
| Number of Functions | 4 |
| Output Type | OPEN-COLLECTOR; OPEN-DRAIN |
| Package Body Material | CERAMIC, GLASS-SEALED |
| Package Equivalence Code | DIP14,.3 |
| Package Shape | RECTANGULAR |
| Package Style | IN-LINE |
| Packing Method | RAIL |
| Qualification Status | Not Qualified |
| Response Time-Nom | 1300ns |
| Subcategory | Comparator |
| Supply Current-Max | 2mA |
| Supply Voltage Limit-Max | 36V |
| Supply Voltage-Nom (Vsup) | 5V |
| Surface Mount | NO |
| Technology | BIPOLAR |
| Temperature Grade | MILITARY |
| Terminal Finish | Tin/Lead (Sn/Pb) |
| Terminal Form | THROUGH-HOLE |
| Terminal Pitch | 2.54mm |
| Terminal Position | DUAL |
| Package | Ceramic Dual-In-Line Packages |
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
| Moisture Sensitivity Level | MSL 1 |
| ECCN | EAR99 |
| HTS Code | 8542.39.00.90 |
Alternate & Equivalent Parts
No known alternates. Submit an RFQ and our team can suggest alternatives.
Frequently Asked Questions
What is the input offset voltage of the LM139AJ/PB?
The LM139AJ/PB has a maximum input offset voltage of 5 mV (5000 µV). While not as tight as precision comparators, this offset is sufficient for most battery monitoring, level detection, and window comparator applications, and the low bias current of 0.3 µA ensures minimal loading on high-impedance signal sources.
Why does the LM139AJ/PB use open-collector outputs?
Open-collector outputs allow the comparator to interface with different logic voltage levels by using an appropriate external pull-up resistor. Multiple outputs can be wired together for wired-AND logic (e.g., alarm aggregation), and the output can directly drive LEDs, relay coils, or logic gates operating at voltages different from the comparator supply.
What package does the LM139AJ/PB use?
It is packaged in a 14-pin ceramic dual-in-line (CDIP) package, providing hermetic sealing for reliable operation in industrial environments with exposure to humidity, temperature extremes, and mechanical stress. The /PB suffix indicates a lead-free (Pb-free) plating, meeting RoHS environmental compliance requirements.
Can the LM139AJ/PB operate from a single supply voltage?
Yes. The LM139AJ/PB is designed to operate from a single supply as well as split (dual) supplies. The input common-mode range extends down to ground, allowing the negative input to be referenced to the system ground rail for single-supply window comparator and threshold detection applications without level shifting.
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About Texas Instruments
Texas Instruments (TI) is a global semiconductor company headquartered in Dallas, Texas. TI designs and manufactures analog and embedded processing chips used in industrial, automotive, consumer, communications, and enterprise systems.
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