LM139 Voltage Comparator, Pinout Guide and Circuit Applications

The LM139 is a reliable voltage comparator with four independent comparators, ideal for various applications using a single power supply. Proper circuit design, pin configuration, and careful calibration ensure stable performance and minimize issues like noise or false triggers. While the datasheet provides details, practical use often reveals helpful insights. With proper design and care, the LM139 delivers dependable results in many electronic projects.

Catalog
1. Overview of the LM139
2. LM139 Pin Setup
3. LM139 CAD Model Design
4. Features of LM139 Op-Amp
5. LM139 Packaging
6. LM139 Utilization Areas
7. Technical Specifications
8. LM139 Block Diagram
9. Typical Applications of LM139
10. LM139 Simplified Circuit Diagram
11. Layout Considerations for the LM139
12. LM139 Manufacturer Overview
LM139
Overview of the LM139
The LM139 is a versatile voltage comparator with four independent comparators, suitable for a wide range of applications. It operates with single or dual power supplies, requiring a voltage difference of 2 V to 36 V, and ensures stable performance by maintaining VCC at least 1.5 V above the common-mode voltage. With low, stable current drain and outputs that support wired-AND logic, it is energy-efficient and ideal for logic and automation systems. Built for tough environments, it functions reliably from –55°C to 125°C, making it suitable for demanding fields like aerospace, defense, and automotive systems where precise sensor input and dependable performance are essential.

Alternatives:

LM339B

LM139AQML

TLC374M

LM239

LM2901

LM139 Pin Setup
LM139 Pinout

 LM139 Pin Function

LM139 CAD Model Design
LM139 CAD Model Design

Features of LM139 Op-Amp
Wide Voltage Range

• Single supply - 2 V to 36 V (tested up to 30 V for standard devices, 32 V for V-suffix devices).

• Dual supply - ±1 V to ±18 V (tested up to ±15 V for standard devices, ±16 V for V-suffix devices).

Low Power Usage

• Typical supply current - 0.8 mA.

Great Input Performance

• Input bias current - 25 nA (typical).

• Input offset current - 3 nA (typical for LM139).

• Input offset voltage - 2 mV (typical).

Versatile Input and Output

• Input range includes ground.

• Handles differential input voltages up to ±36 V.

• Compatible with TTL, MOS, and CMOS outputs.

Low Output Voltage

• Minimal saturation voltage for efficient performance.

Military-Grade Option

• MIL-PRF-38535-compliant devices have fully tested parameters.

• Other devices may not test all parameters during production.

LM139 Packaging
LM139 Packaging

LM139 Utilization Areas
• Industrial - Used in industrial automation systems for monitoring and controlling processes with precise voltage detection and regulation.

• Automotive

– HEV/EV and Powertrains - Monitors voltage levels in hybrid and electric vehicles' powertrains to ensure optimal performance.

– Infotainment Systems and Instrument Clusters - Provides reliable voltage reference for automotive entertainment and display systems.

– Body Control Modules - Handles various control systems in vehicles, including lighting and window operation, requiring precise voltage regulation.

• Power Supervision - Ensures stable power supply and voltage regulation in circuits to prevent damage from over-voltage conditions.

• Oscillators - Used in generating stable, oscillating signals for timing or frequency generation in electronic circuits.

• Peak Detectors - Detects and holds the peak voltage in a signal, useful in measuring high-speed signals and transient events.

• Logic Voltage Translation - Converts voltage levels between different logic systems, ensuring compatibility in mixed-voltage designs.