LM339PT

Product Overview

• Category: Integrated Circuit (IC)
• Use: Voltage Comparator
• Characteristics: Low power consumption, wide supply voltage range, high input impedance, open collector output, temperature stability
• Package: TO-220-14
• Essence: The LM339PT is a quad voltage comparator designed for use in various applications requiring precision analog signal comparisons.
• Packaging/Quantity: Available in tubes of 25 units or reels of 2,500 units.

Specifications

• Supply Voltage Range: 2V to 36V
• Input Offset Voltage: ±1mV (maximum)
• Input Bias Current: ±25nA (maximum)
• Response Time: 1.3μs (typical)
• Output Sink Current: 16mA (maximum)
• Operating Temperature Range: -40°C to +125°C

Pin Configuration

The LM339PT has a total of 14 pins arranged as follows:

___________ VCC |1 14| GND IN-1 |2 13| OUT-1 IN+1 |3 12| OUT-2 IN-2 |4 11| OUT-3 IN+2 |5 10| OUT-4 IN-3 |6 9| - IN+3 |7 8| + -----------

Functional Features

• Quad voltage comparator with open collector outputs
• Wide supply voltage range allows operation from low voltage to industrial levels
• High input impedance minimizes loading effects on the input signals
• Low power consumption makes it suitable for battery-powered applications
• Temperature stability ensures reliable performance across varying environmental conditions

Advantages and Disadvantages

Advantages: - Versatile and widely used in various applications - Low power consumption extends battery life - Wide supply voltage range allows for flexible operation - Open collector outputs provide compatibility with different logic levels - Temperature stability ensures consistent performance

Disadvantages: - Limited output current capability - Requires external pull-up resistors for proper output voltage levels - Not suitable for high-speed applications due to slower response time

Working Principles

The LM339PT operates as a voltage comparator by comparing two input voltages and producing a digital output based on their relative magnitudes. It utilizes an internal reference voltage to determine the threshold at which the output switches states. When the voltage at the non-inverting input (+) is higher than the voltage at the inverting input (-), the output goes low (sink). Conversely, when the voltage at the non-inverting input is lower, the output goes high (open circuit).

Detailed Application Field Plans

The LM339PT finds applications in various fields, including:

1. Battery Management Systems: Voltage monitoring and protection circuits.
2. Motor Control: Overcurrent and overvoltage protection circuits.
3. Power Supplies: Voltage regulation and fault detection circuits.
4. Automotive Electronics: Speed control, lighting control, and safety systems.
5. Industrial Automation: Signal conditioning and level detection circuits.

Detailed and Complete Alternative Models

Some alternative models to the LM339PT include:

1. LM393: Dual voltage comparator in a smaller package.
2. LM311: Single voltage comparator with faster response time.
3. LM324: Quad operational amplifier with built-in voltage comparators.

These alternatives offer similar functionality but may have differences in specifications, package types, or additional features.

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