Product Overview
LM339N Quad Differential Comparator IC 14-Pin DIP Through-Hole
Condition
Unused new old stock (NOS). Clean through-hole leads with intact factory finish. Markings legible: LM339N with Texas Instruments logo. Evaluation: Visual inspection only. Function testing not performed.
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Product Overview
Texas Instruments LM339N houses four independent voltage comparators in a standard 14-pin plastic dual in-line package (PDIP-14). Engineered for flexibility, it operates across a wide supply span from a single 2V to 36V rail or dual split supplies from ±1V to ±18V. Each channel features an open-collector output, allowing clean interfacing to TTL, CMOS, MOS, and DTL logic levels, as well as wired-OR output configurations.
Key Features
- Four independent comparator channels in one package
- Supply voltage range: 2V to 36V single supply, or ±1V to ±18V dual supplies
- Open-collector outputs for flexible logic level shifting and wired-OR circuits
- Low supply current drain: 0.8 mA typical, largely independent of supply voltage
- Low input bias current: 25 nA typical
- Low input offset voltage: 2 mV typical
- Standard 14-pin through-hole DIP package (PDIP-14)
Applications
- Threshold detection in benchtop power supply supervisory circuits
- Zero-crossing detector stages in analog synthesizers and audio processing gear
- Window comparator circuits for battery voltage level monitoring
- Direct replacement for restoring classic arcade boards and vintage computing hardware
Frequently Asked Questions
Does each comparator output require an external pull-up resistor?
Yes. The LM339N features open-collector outputs. An external pull-up resistor connected from the output pin to your logic rail is required to pull the output high when the comparator turns off.
Can the LM339N operate from split positive and negative supplies?
Yes. It supports dual supplies down to ±1V up to ±18V, provided the total voltage difference between the positive and negative rails does not exceed 36V.
How many separate comparator circuits are inside a single LM339N?
Four completely independent comparator channels are integrated into the 14-pin package, sharing common power supply and ground pins. The price per piece drops at each step in the price-break table on this page.
Four clean comparison stages in one through-hole DIP - the dependable workhorse for turning messy analog levels into decisive digital logic.
