Product Overview
National Semiconductor LM339N Quad Differential Comparator IC DIP-14
Condition
Used equipment pull. Evaluation: Visual inspection only. Function testing not performed. Top surface markings are crisp and fully legible: National Semiconductor logo, B8424, LM339N. Through-hole leads show typical solder and insertion residue from previous board installation.
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Product Overview
The LM339N is a low-power quad differential voltage comparator from National Semiconductor housed in a standard 14-pin dual in-line package (DIP-14). Containing four independent precision voltage comparators designed to operate from a single power supply over a wide range of voltages, it also supports split supply operation.
Key Features
- Four independent differential voltage comparators in a single DIP-14 package
- Wide supply voltage range: +2V to +36V DC single supply, or ±1V to ±18V DC split supply
- Open-collector outputs compatible with TTL, DTL, MOS, and CMOS logic
- Low supply current drain independent of supply voltage
- Standard through-hole 14-lead plastic DIP configuration
Applications
- Replacing a failed comparator IC during bench repair of vintage test equipment, power supplies, or industrial control boards
- Prototyping limit comparators, window detectors, and level translators on solderless breadboards or perfboards
- Restoring legacy electronics where authentic National Semiconductor marked silicon is preferred
Frequently Asked Questions
What output configuration does the LM339N use?
The LM339N uses open-collector outputs, allowing easy interfacing to different logic voltage levels and wired-OR connections with external pull-up resistors.
Can this comparator run from a single 5V logic supply?
Yes. The LM339N operates from single supplies as low as +2V DC up to +36V DC, making it directly compatible with standard 5V digital systems.
Why buy an individual used pull instead of a large surplus lot?
Buying an individual, photographed component lets you fix the circuit on your bench without buying excess stock you do not need. Shipping is $8 flat rate, free once your order passes $28, and orders leave our Idaho warehouse the same or next business day.
The LM339 has been resolving threshold voltages reliably for decades. Pop this classic DIP-14 into your socket and get your circuit making decisions again.
