LM339 Quad Differential Comparator

The LM339 Quad Differential Comparator is a low-power integrated circuit that contains four independent voltage comparators in a single package. Designed to operate from a wide supply voltage range, the LM339 features open-collector outputs, allowing flexible interfacing with TTL, CMOS, relays, and other logic devices. It is widely used in voltage monitoring, window comparators, zero-crossing detectors, and industrial control systems.

Key Features

• Four Independent Comparators
  Enables multiple voltage comparisons in a single IC.

• Wide Operating Voltage Range
  Supports single-supply and dual-supply operation.

• Low Power Consumption
  Ideal for battery-powered and energy-efficient designs.

• Open-Collector Outputs
  Allows wired-OR connections and easy interfacing.

• High Input Impedance
  Minimizes loading on input signals.

Specifications

• IC Type: Quad Differential Comparator

• Model: LM339

• Number of Comparators: 4

• Supply Voltage:

  • Single Supply: 2V to 36V

  • Dual Supply: ±1V to ±18V

• Output Type: Open Collector

• Input Offset Voltage: ~2 mV (typical)

• Input Bias Current: ~25 nA (typical)

• Propagation Delay: ~1.3 µs

• Operating Temperature Range: 0°C to +70°C (commercial grade)

• Package Types: DIP-14 / SOIC-14

• Applications: Window comparator, level detection, over/under-voltage protection, zero-cross detection, signal conditioning