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Texas Instruments LM139J/PB
- Part No.:
- LM139J/PB
- Manufacturer:
- Texas Instruments
- Category:
- Comparators
- Package:
- 14-CDIP (0.300", 7.62mm)
- Datasheet:
-
LM139J/PB.pdf
- Description:
- IC COMPARATOR 4 GEN PUR 14CDIP
- Quantity:
- Payment:
- Shipping:
Inventory:294
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Product details
Overview
LM139J/PB from Texas Instruments is a quad voltage comparator IC with open-collector outputs, designed for single- or dual-supply operation across −55°C to +125°C. It delivers ±3 mV max input offset voltage, 0.8 mA typical supply current per comparator, and input common-mode range extending to ground-enabling precision threshold detection in industrial control, power monitoring, and analog-to-digital interface circuits.
For engineers reviewing the LM139J/PB datasheet, LM139J/PB pinout, LM139J/PB application, or LM139J/PB equivalent, this device supports TTL/CMOS logic interfacing, wired-OR output configurations, low-voltage (2 V) operation, and high-voltage (36 V) output sinking-critical for robust level-shifting, window detection, and battery-powered sensor conditioning designs.
Technical Context
The LM139J/PB integrates four independent PNP-input comparators on a monolithic die, each featuring uncommitted NPN output transistors capable of sinking up to 16 mA with 250 mV saturation voltage at 4 mA. Its bias network ensures supply-current independence from V+ magnitude over 2–36 VDC.
Input common-mode voltage includes GND even under single-supply operation, and differential input voltage tolerance extends to ±36 V-allowing safe overvoltage handling without damage. The absence of antisaturation clamps yields <0.1 nA output leakage in OFF state, enabling high-impedance node switching.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 2–36 VDC (single) or ±1 to ±18 VDC (dual)-supports wide-system rail compatibility and eliminates need for dual supplies in mixed-voltage systems. |
| Input Offset Voltage | ±3 mV max at 25°C-enables accurate threshold detection down to millivolt-level signal differentials. |
| Supply Current | 0.8 mA per comparator (typical)-allows stable operation in battery-powered or low-power standby modes. |
| Input Bias Current | 25 nA max-minimizes loading on high-impedance reference or sensor sources. |
| Output Saturation Voltage | 250 mV at 4 mA sink-ensures clean logic-low levels when driving TTL or CMOS inputs directly. |
| Input Common-Mode Range | Includes GND to V+−1.5 V-permits direct sensing of signals referenced to system ground without level-shifting. |
| Response Time | 300 ns (large-signal, 100-mV step)-sufficient for medium-speed pulse discrimination and timing applications. |
Pinout & Package
LM139J/PB is housed in a 14-pin Ceramic Dual In-line Package (CDIP) with body size 19.56 mm × 6.67 mm, rated for military-grade temperature operation (−55°C to +125°C) and hermetic sealing.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | OUTPUT2 | Open-collector output of Comparator 2-requires external pull-up to define HIGH level; sinks up to 16 mA. |
| 2 | OUTPUT1 | Open-collector output of Comparator 1-enables wired-OR logic or direct TTL/CMOS interface. |
| 3 | V+ | Positive supply pin-accepts 2–36 VDC or connects to +V in dual-supply mode. |
| 4 | INPUT1− | Inverting input of Comparator 1-used for reference voltage or feedback in hysteresis configurations. |
| 5 | INPUT1+ | Noninverting input of Comparator 1-connects to sensed signal for basic threshold comparison. |
| 6 | INPUT2− | Inverting input of Comparator 2-supports dual-threshold or window comparator top/bottom references. |
| 7 | INPUT2+ | Noninverting input of Comparator 2-pairs with Pin 6 for independent channel 2 signal evaluation. |
| 8 | INPUT3− | Inverting input of Comparator 3-enables three-channel monitoring (e.g., over/under/valid windows). |
| 9 | INPUT3+ | Noninverting input of Comparator 3-provides third independent analog decision path. |
| 10 | INPUT4− | Inverting input of Comparator 4-supports full quad functionality for multi-zone fault detection. |
| 11 | INPUT4+ | Noninverting input of Comparator 4-completes four-channel analog-to-digital conversion capability. |
| 12 | GND | Ground reference-serves as return path for all comparators and defines input common-mode baseline. |
| 13 | OUTPUT4 | Open-collector output of Comparator 4-identical electrical behavior to Pins 1 and 2. |
| 14 | OUTPUT3 | Open-collector output of Comparator 3-enables parallel or cascaded logic functions. |
Key Features
| Feature | Design Value |
|---|---|
| Quad independent comparators | Four fully isolated channels on one die-reduces board space and inter-channel crosstalk vs discrete solutions. |
| Open-collector outputs | Supports wired-OR logic, level translation up to 36 V, and direct interface with TTL/DTL/ECL/MOS/CMOS families. |
| Input common-mode range includes GND | Enables zero-reference sensing (e.g., current shunt monitoring, battery voltage thresholds) without external level shifters. |
| Low input bias current (25 nA) | Preserves accuracy in high-impedance sensor interfaces (thermistors, photodiodes) and precision reference networks. |
| Wide supply range (2–36 V) | Operates across automotive, industrial, and legacy equipment rails-no auxiliary regulators needed. |
| Low quiescent current (0.8 mA/comparator) | Extends battery life in portable instrumentation and enables always-on monitoring in energy-constrained systems. |
Applications
| Limit Comparators | Simple Analog-to-Digital Converters (ADCs) |
|---|---|
Use Scenario: Monitoring motor phase current to trigger shutdown if exceeding safe thermal limits. IC Role / Device Role / Timing Role: LM139J/PB compares sensed current against fixed reference; outputs drive latch or microcontroller interrupt. Use Value: Enables fast, deterministic overcurrent protection with sub-3 mV offset-critical for consistent trip points across temperature. |
Use Scenario: Converting thermistor voltage into 2-bit digital code for coarse temperature indication. IC Role / Device Role / Timing Role: LM139J/PB acts as flash ADC core-four comparators resolve 4 thresholds simultaneously. Use Value: Delivers 300 ns response time and rail-to-rail input range, allowing real-time digitization without sample-and-hold circuitry. |
| Pulse, Squarewave, and Time Delay Generators | Multivibrators and High-Voltage Digital Logic Gates |
Use Scenario: Generating precise 10-ms delay after power-on reset using RC timing and hysteresis. IC Role / Device Role / Timing Role: LM139J/PB configured as one-shot multivibrator with input lockout; output drives MOSFET gate. Use Value: Input common-mode range including GND and 250 mV saturation enable reliable triggering from 0 V start conditions. |
Use Scenario: Building high-voltage AND/OR logic gates for PLC I/O modules operating at 24 V. IC Role / Device Role / Timing Role: LM139J/PB outputs wired-OR'd to generate 24 V logic levels compatible with industrial sensors. Use Value: Open-collector outputs support 36 V sink capability-eliminates level translators and simplifies 24 V system integration. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar quad comparator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM339N | Commercial temperature range (0°C to +70°C); same pinout and electrical specs except wider offset (±5 mV max) and higher bias current (250 nA max). | Suitable for cost-sensitive consumer electronics where extended temperature is not required. | Select LM339N only when operating ambient stays within 0–70°C and ±5 mV offset is acceptable. |
| LM2901N | Industrial temperature range (−40°C to +85°C); identical pinout but higher input offset (±7 mV max) and reduced gain (25 V/mV typ vs 50 V/mV). | Preferred for automotive cabin modules or industrial controllers needing −40°C startup capability. | Choose LM2901N when extended low-temp operation is mandatory and gain margin above 25 V/mV is sufficient. |
Compared with LM139J/PB, LM339N trades military-grade reliability for lower cost in benign environments, while LM2901N offers broader industrial temperature coverage at the expense of precision-making LM139J/PB optimal for high-reliability, wide-temperature, low-offset applications.
Availability
LM139J/PB is available at Aetrix Electronics and suitable for industrial control systems, aerospace power monitoring, and high-reliability test equipment requiring stable component supply across extreme temperature cycles and long product lifecycles.
Supply support for LM139J/PB 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 IC design and military-grade qualification.
LM139J/PB belongs to TI's legacy LMx39-N quad comparator family, engineered for high-reliability industrial, aerospace, and defense applications demanding wide supply range, ground-sensing capability, and hermetic packaging.
FAQ
What is the maximum operating temperature range for LM139J/PB?
The LM139J/PB is specified for operation from −55°C to +125°C, making it suitable for military, aerospace, and harsh-environment industrial applications. This extended range is enabled by its ceramic DIP (CDIP) package and internal design optimizations-distinct from commercial variants like LM339N (0°C to +70°C) or LM2901N (−40°C to +85°C). Always verify thermal derating per application load.
Does LM139J/PB require external pull-up resistors on its outputs?
Yes, LM139J/PB features open-collector outputs and requires external pull-up resistors to define the HIGH logic level. The resistor value must be selected based on sink current (up to 16 mA), desired rise time, and logic family voltage requirements-e.g., 10 kΩ for 5 V TTL, 4.7 kΩ for 3.3 V CMOS. No pull-up is needed if used as a simple ground-switching element.
Can LM139J/PB operate from a single 3.3 V supply?
Yes, LM139J/PB supports single-supply operation down to 2 VDC, so it functions reliably at 3.3 V. At this voltage, key parameters include 0.8 mA typical supply current, ±3 mV max offset, and 250 mV saturation voltage at 4 mA sink-enabling direct interface with 3.3 V logic families when paired with appropriate pull-up resistors.
How does the input common-mode range of LM139J/PB benefit ground-referenced sensing?
The LM139J/PB input common-mode range explicitly includes GND-even under single-supply operation-allowing direct connection of sensors (e.g., current shunts, RTDs) to ground-referenced inputs without level-shifting circuitry. This eliminates offset errors and component count in applications like battery voltage monitoring or motor current protection.
Is LM139J/PB pin-compatible with LM339N or LM2901N?
Yes, LM139J/PB shares identical 14-pin CDIP pinout and functional mapping with LM339N (SOIC/PDIP) and LM2901N (PDIP/SOIC), but physical package differs: LM139J/PB uses hermetic ceramic DIP, while others use plastic packages. Electrical compatibility is maintained across all three for standard quad comparator functions-though temperature range and precision specs differ.
LM139J/PB 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 (±):
- 2V ~ 36V, ±1V ~ 18V
- :
- 5mV @ 30V
- Voltage - Input Offset (Max):
- 0.1µA @ 5V
- Current - Input Bias (Max):
- 16mA @ 5V
- Current - Output (Typ):
- 2.5mA
- Current - Quiescent (Max):
- -
- CMRR, PSRR (Typ):
- -
- Propagation Delay (Max):
- -
- Hysteresis:
- -55°C ~ 125°C
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- Through Hole
- :
- 14-CDIP
LM139J/PB FAQ
1.How can I place an order for LM139J/PB through Aetrix?
Please submit a Request for Quotation (RFQ) for LM139J/PB 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 LM139J/PB reliable?
The price and inventory of LM139J/PB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM139J/PB is usually 5 days.
3.What payment methods are accepted for LM139J/PB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM139J/PB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM139J/PB?
LM139J/PB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM139J/PB 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 LM139J/PB?
For technical support, including LM139J/PB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM139J/PB requirements.
6.How does Aetrix verify that LM139J/PB is sourced from the original manufacturer or authorized distributors?
All LM139J/PB 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 LM139J/PB meets industry standards.
7.What is the process for return or replacement of LM139J/PB?
All LM139J/PB units undergo pre-shipment inspection (PSI). If there is an issue with LM139J/PB, 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 LM139J/PB part is unused and in its original packaging.
Return procedure for LM139J/PB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LM139J/PB Tags
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