The LM339L is a low-power quad comparator from UTC (Unisonic Technologies Co., Ltd.). It consists of four independent voltage comparators designed to operate from a single power supply over a wide voltage range. These comparators are characterized by low input bias current, low offset voltage, and high open-loop gain, making them suitable for various analog signal processing applications.

Applications

• Voltage Comparators
• Zero Crossing Detectors
• Oscillator Circuits
• Analog-to-Digital Converters (ADCs)
• Relay Drivers
• Window Comparators
• Level Detectors

Features

• Low supply current drain: 0.8mA (typical) at VCC = +5V
• Wide single-supply voltage range: +2V to +36V
• Dual-supply operation: ±1V to ±18V
• Low input bias current: 25nA (typical)
• Low input offset voltage: 2mV (typical)
• High open-loop gain: 100dB (typical)
• Output compatible with TTL, DTL, ECL, MOS, and CMOS logic
• Available in various packages such as DIP, SOP, and TSSOP

Benefits

• Low power consumption makes it suitable for battery-powered applications.
• Wide supply voltage range provides flexibility in various circuit designs.
• Low input bias current minimizes loading effects on the input signal.
• High open-loop gain ensures accurate comparison of input voltages.
• TTL compatible output allows direct interface with digital logic circuits.
• Multiple comparators in a single package reduce component count and board space.

Additional Details

The LM339L provides an open-collector output, allowing for wired-OR configurations. This means multiple comparators can be connected to a single pull-up resistor to create a more complex logic function. The device operates over a wide temperature range, typically -40°C to +85°C, making it suitable for industrial applications. Input common-mode voltage range includes ground, simplifying single-supply operation.