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Texas Instruments LM219J
- Part No.:
- LM219J
- Manufacturer:
- Texas Instruments
- Category:
- Comparators
- Package:
- 14-CDIP (0.300", 7.62mm)
- Datasheet:
-
LM219J.pdf
- Description:
- IC COMPARATOR 2 GEN PUR 14CDIP
- Quantity:
- Payment:
- Shipping:
Inventory:4,269
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Product details
Overview
LM219J from Texas Instruments is a high-speed dual comparator IC designed for precision threshold detection in industrial control and relay driver circuits. It operates from ±15 V or single 5-V supplies, delivers 80-ns typical response time, supports ±13 V input common-mode range, and drives up to 25 mA per output with uncommitted collector outputs compatible with TTL/DTL/RTL logic families.
For engineers reviewing the LM219J datasheet, LM219J pinout, LM219J application, or LM219J equivalent, this page provides verified technical context, package-specific pin functions, real-world use scenarios, and validated alternative options for comparator-based signal conditioning, window detection, and discrete load switching designs.
Technical Context
The LM219J implements two independent, high-gain comparators on a single monolithic die with uncommitted NPN open-collector outputs. Its input stage features low bias current (150–500 nA) and low offset voltage (0.7–7 mV), enabling accurate sensing across wide supply ranges (±15 V or +5 V/ground).
It supports isolation of inputs and outputs from system ground, exhibits high common-mode slew rate, and maintains stable operation over −25°C to +85°C - distinguishing it from the wider-temperature LM119 and commercial-grade LM319 variants.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Response Time | 80 ns typical at ±15 V - enables fast edge detection in motor control feedback or pulse-width monitoring. |
| Input Offset Voltage | 0.7–7 mV max - defines minimum detectable differential voltage before output switching. |
| Input Bias Current | 150–1000 nA - ensures minimal loading on high-impedance sensor sources like thermistors or photodiodes. |
| Output Drive | 25 mA sink per channel - directly drives relays, LEDs, or logic gates without external buffers. |
| Supply Range | Single 5-V or dual ±15-V - supports integration into both digital logic systems and analog power rails. |
| Operating Temperature | −25°C to +85°C - qualified for industrial environments excluding extended military or automotive extremes. |
| Input Common-Mode Range | ±13 V at ±15 V supply - allows sensing signals referenced to non-ground potentials, e.g., floating battery monitors. |
Pinout & Package
LM219J uses the 14-pin Ceramic Dual-In-Line Package (CDIP-J), measuring 6.67 mm × 19.56 mm with 2.54 mm lead pitch and hermetic ceramic lid sealing. The package supports high-reliability applications requiring moisture resistance and thermal stability.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Comparator 1 Output | Open-collector NPN output - requires external pull-up to define logic HIGH level and drive loads. |
| 2 | Comparator 1 Ground | Dedicated ground reference for first comparator - isolates noise coupling between channels. |
| 3 | Comparator 1 Non-Inverting Input | Positive input terminal - accepts reference or signal voltage for threshold comparison. |
| 4 | Comparator 1 Inverting Input | Negative input terminal - used for feedback or inverted signal path in hysteresis configurations. |
| 5 | Negative Supply Voltage (V−) | Connects to negative rail - enables dual-supply operation down to −15 V. |
| 6 | Comparator 2 Output | Independent open-collector output - supports dual-threshold or redundant sensing architectures. |
| 7 | Comparator 2 Ground | Second dedicated ground - enhances channel-to-channel isolation in noisy systems. |
| 8 | Comparator 2 Non-Inverting Input | Second positive input - enables window detection or parallel signal evaluation. |
| 9 | Comparator 2 Inverting Input | Second negative input - configurable for differential or single-ended sensing per channel. |
| 10 | Positive Supply Voltage (V+) | Connects to positive rail - supports single 5-V or dual ±15-V operation. |
| 11–14 | No Connect | Unused pins - must remain unconnected; no grounding or routing required. |
Key Features
| Feature | Design Value |
|---|---|
| Two Independent Comparators | Enables simultaneous dual-threshold decisions - e.g., overvoltage/undervoltage detection in power supplies. |
| Uncommitted Collector Outputs | Supports direct interface to TTL/DTL/RTL logic, lamps, or relays without level-shifting circuitry. |
| Isolated Ground Pins | Reduces crosstalk between comparator channels - critical for precision measurement in shared PCB layouts. |
| High Common-Mode Slew Rate | Maintains accurate comparison during fast-rising common-mode transients - useful in motor phase sensing. |
| Low Input Current (≤1 μA) | Minimizes error in high-impedance sensor interfaces - preserves accuracy in battery-powered instrumentation. |
Applications
| Relay Driver | Window Detector |
|---|---|
Use Scenario: Driving electromagnetic relays in programmable logic controllers (PLCs) based on analog sensor thresholds. IC Role / Device Role / Timing Role: Dual comparator providing clean, fast-switching control signals to relay coils via open-collector outputs. Use Value: Eliminates need for discrete transistor buffers; 25 mA sink capability directly energizes standard 5 V/12 V relays. |
Use Scenario: Monitoring battery voltage within safe upper/lower limits in portable medical devices. IC Role / Device Role / Timing Role: Two comparators configured as high/low threshold detectors with logic OR output. Use Value: Detects out-of-range conditions with <80 ns latency - faster than microcontroller-based ADC polling. |
| Motor Overcurrent Protection | Industrial Level Shifter |
Use Scenario: Shutting down H-bridge drivers when current-sense amplifier output exceeds trip thresholds. IC Role / Device Role / Timing Role: Fast comparator detecting overcurrent events and asserting fault signals to gate drivers. Use Value: 80 ns response prevents MOSFET destruction during short-circuit transients in 48 V motor drives. |
Use Scenario: Converting ±10 V industrial sensor outputs to 0–5 V logic-compatible signals for microcontrollers. IC Role / Device Role / Timing Role: Precision comparator acting as zero-crossing detector or reference-level translator. Use Value: Low 0.7 mV offset ensures sub-millivolt accuracy in analog-to-digital interface stages. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual comparator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM319N/NOPB | Commercial temperature range (0°C to +70°C); higher input offset voltage (up to 10 mV); same 80 ns response. | Targeted at cost-sensitive consumer or lab equipment - not rated for industrial ambient extremes. | Select LM319N/NOPB only if operating environment stays within 0–70°C and offset tolerance >10 mV is acceptable. |
| LM119H | Military-grade temperature range (−55°C to +125°C); TO-100 metal-can package; identical electrical specs. | Suitable for aerospace, defense, or downhole oil/gas systems requiring extreme thermal resilience. | Choose LM119H when full military-spec temperature performance and hermetic metal packaging are mandatory. |
Compared with LM319N/NOPB and LM119H, the LM219J occupies a mid-tier niche: it offers industrial-temperature operation (−25°C to +85°C) in a reliable hermetic CDIP package, balancing cost, reliability, and environmental robustness for factory automation and embedded control.
Availability
LM219J is available at Aetrix Electronics and suitable for industrial control systems, relay interface modules, and analog threshold detection circuits requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for LM219J 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 expertise in precision signal chain components.
The LM219J belongs to TI's legacy high-speed comparator product line, engineered specifically for industrial and instrumentation applications demanding fast, reliable voltage comparisons under varying supply and thermal conditions.
FAQ
What is the maximum operating temperature for the LM219J?
The LM219J is specified to operate reliably from −25°C to +85°C. This industrial temperature range distinguishes it from the commercial LM319 (0°C to +70°C) and military-grade LM119 (−55°C to +125°C). Exceeding +85°C may cause parametric drift or premature failure; thermal derating is not supported beyond this limit.
Does the LM219J require external pull-up resistors on its outputs?
Yes, the LM219J features open-collector NPN outputs that require external pull-up resistors to define the HIGH logic state and source current to driven loads. Typical values range from 1 kΩ to 10 kΩ depending on speed and load requirements; lower resistance improves rise time but increases power consumption.
Can the LM219J operate from a single 5-V supply?
Yes, the LM219J is fully specified for single 5-V operation with ground reference. Input common-mode range extends from 1 V to 3 V under this condition, and output saturation voltage remains ≤0.4 V at 3.2 mA sink current - making it suitable for 5-V logic interfacing and low-voltage sensor monitoring.
How does the LM219J differ from the LM319 in terms of precision?
The LM219J has looser offset voltage specifications (0.7–7 mV) compared to the LM319A (0.5–2 mV), reflecting its industrial - not precision - grade targeting. Both share identical 80 ns response time and output drive capability, but the LM319A is preferred where sub-millivolt threshold accuracy is critical, such as in calibration equipment.
Is the LM219J pin-compatible with other LMx19 family members?
Yes, all LMx19 variants - including LM119, LM219, and LM319 - share identical 14-pin CDIP (J), PDIP (N), and SOIC (D) footprints and pinouts. The LM219J can be substituted for LM319N/NOPB or LM119J in existing layouts, provided temperature and precision requirements align with the chosen variant.
LM219J Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Package/Case:
- 14-CDIP (0.300", 7.62mm)
- Series:
- -
- Packaging:
- Tube
- Product Status:
- Obsolete
- Type:
- General Purpose
- Number of Elements:
- 2
- Output Type:
- DTL, Open-Collector, Open-Emitter, RTL, TTL
- Voltage - Supply, Single/Dual (±):
- 5V ~ 36V, ±2.5V ~ 18V
- :
- 4mV @ ±15V
- Voltage - Input Offset (Max):
- 0.5µA @ ±15V
- Current - Input Bias (Max):
- -
- Current - Output (Typ):
- 4.3mA
- Current - Quiescent (Max):
- -
- CMRR, PSRR (Typ):
- -
- Propagation Delay (Max):
- -
- Hysteresis:
- -25°C ~ 85°C
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- Through Hole
- :
- 14-CDIP
LM219J FAQ
1.How can I place an order for LM219J through Aetrix?
Please submit a Request for Quotation (RFQ) for LM219J 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 LM219J reliable?
The price and inventory of LM219J are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM219J is usually 5 days.
3.What payment methods are accepted for LM219J?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM219J transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM219J?
LM219J orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM219J 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 LM219J?
For technical support, including LM219J datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM219J requirements.
6.How does Aetrix verify that LM219J is sourced from the original manufacturer or authorized distributors?
All LM219J 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 LM219J meets industry standards.
7.What is the process for return or replacement of LM219J?
All LM219J units undergo pre-shipment inspection (PSI). If there is an issue with LM219J, 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 LM219J part is unused and in its original packaging.
Return procedure for LM219J:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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