LM339 IC Low-Power Low-Offset Voltage Quad Comparator SOIC-14

LM339 IC Low-Power Low-Offset Voltage Quad Comparator SOIC-14 is a versatile and highly efficient integrated circuit designed to provide four independent voltage comparators within a single surface-mount package. This high-performance device operates effectively across a wide range of voltages, allowing it to function seamlessly in both single-supply and dual-supply systems. Consequently, engineers frequently utilize the LM339 for precision tasks such as level detection and signal conditioning where minimal power consumption is critical. The IC features an open-collector output stage, which offers the distinct advantage of allowing the user to interface with various logic levels. Furthermore, its low offset voltage ensures accurate comparisons even when dealing with sensitive input signals. Therefore, you can rely on this SOIC-14 component to deliver stable and high-speed switching performance in modern space-constrained electronic designs.

Key Features:

• Quad Comparator Design: This IC houses four independent voltage comparators, which significantly reduces component count and PCB footprint.
• Wide Supply Range: The device operates from a single supply of 2 V to 36 V or a dual supply of ±1 V to ±18 V, providing immense flexibility for different power architectures.
• Low Input Offset Voltage: Features a typical offset voltage of ±2 mV, which ensures high precision during the comparison of input signals.
• Open-Collector Outputs: The output stage requires an external pull-up resistor, however, this allows the IC to easily interface with TTL, DTL, ECL, MOS, and CMOS logic levels.
• Low Current Drain: Consumes approximately 0.8 mA regardless of the supply voltage, making it an ideal choice for battery-powered or energy-efficient applications.

Technical Specifications:

• Supply Voltage (V_CC): 2 V to 36 V (Single Supply) or ±1 V to ±18 V (Dual Supply)
• Input Offset Voltage (V_IO): Typically ±2 mV (≤ 5 mV max)
• Input Bias Current: 25 nA (Typically)
• Response Time: ≈ 1.3 μs
• Output Sink Current: 16 mA (Typically at V_OL ≤ 1.5 V)
• Common-Mode Input Voltage Range: Includes Ground (0 V) during single-supply operation.
• Operating Temperature: 0°C to +70°C (Commercial Grade)

Mechanical Specifications:

• Package Type: SOIC-14 (Small Outline Integrated Circuit)
• Mounting Style: Surface Mount Technology (SMT)
• Case Material: Molded Plastic (UL 94 V-0 Rated)
• Lead Finish: Matte Tin or Gold Plated (Depending on manufacturer)

Dimensions:

• Body Length: ≈ 8.65 mm
• Body Width: ≈ 3.91 mm
• Overall Width (including pins): ≈ 6.00 mm
• Pin Pitch: 1.27 mm
• Total Height: ≈ 1.75 mm

Pinout and Wiring:

• Pin 3 (V_CC+): Connect to the positive power supply rail.
• Pin 12 (GND/V_CC-): Connect to the circuit ground or negative supply rail.
• Input Pins (e.g., Pins 4, 5): Connect your reference and input signals to the Inverting (−) and Non-inverting (+) terminals.
• Output Pins (e.g., Pin 2): These are open-collector pins. Consequently, you must connect a pull-up resistor between the output pin and the desired logic voltage.
• Wiring Note: Ensure that the input signals stay within the common-mode range to maintain accurate output switching.

Datasheet Reference:

• Download Texas Instruments LM339 Datasheet

Commonly Used in:

• Level Detectors: Creating simple “go/no-go” indicators for battery levels or sensor thresholds.
• Signal Generators: Building oscillators, square wave generators, and pulse-width modulation (PWM) circuits.
• Industrial Controllers: Monitoring environmental conditions where four separate comparisons are necessary.

Applications:

• Zero-Crossing Detectors: Converting sine waves into square waves for timing and synchronization.
• Limit Comparators: Monitoring if a voltage stays within a specific “window” range.
• Driving Logic: Interfacing analog sensors with digital microcontrollers or logic gates.
• Driving High-Voltage Loads: Controlling relays or LEDs through the open-collector output stage.

Equivalent Models:

• LM239: An industrial-grade version with a wider temperature range.
• LM2901: An automotive-qualified equivalent with extended reliability.
• MC3302: A functionally similar quad comparator from different manufacturers like ON Semiconductor.

Package Includes:

• 1 x LM339 IC Low-Power Low-Offset Voltage Quad Comparator SOIC-14