LP339N

Overview

The LP339N is a quad differential voltage comparator manufactured by Texas Instruments, designed for operation from a single power supply. It features four independent comparators within a 14-pin PDIP package. The device supports a supply voltage range of 5 V to 30 V and operates at a quiescent current of 2 mA. Key electrical specifications include an input offset voltage of 5 mV, an input bias current of 25 nA, and a typical response time of 8 µs. It provides an open-collector output capable of sinking up to 20 mA per channel, suitable for interfacing with various logic families.

Feature Summary

• Quad differential architecture providing four independent comparison channels in a single integrated circuit
• Open-collector output stage allowing flexible interfacing with diverse logic systems and voltage levels
• Single-supply operation capability enabling direct connection to ground-referenced signals

Applications

• General-purpose analog signal comparison circuits
• Over-voltage and under-voltage detection systems
• Simple threshold sensing applications

Procurement Notes

Verify the specific manufacturing origin and RoHS compliance status when sourcing this component, as legacy variants may differ from current production runs. Confirm that the 14-PDIP through-hole package matches your board design requirements. Ensure the operating temperature range of 0°C to +70°C aligns with your environmental constraints before finalizing procurement decisions.

Selection Notes

Select the LP339N when low cost and general-purpose performance are prioritized over high-speed switching or ultra-low power consumption. This component is appropriate for applications where an 8 µs response time is sufficient and a higher quiescent current of 2 mA is acceptable. Consider alternatives like the LP339N/NOPB if lead-free compliance is strictly required for the specific project phase.

Part Context

The LP339N belongs to the broader LMx39 family of quad comparers produced by Texas Instruments. It shares functional similarities with the LM339 but typically exhibits different power consumption characteristics. This series is widely utilized in industrial and consumer electronics for basic voltage monitoring tasks due to its robustness and widespread availability in standard DIP packages.

Replacement Considerations

The LP339N/NOPB serves as a verified lead-free replacement variant within the same product family. Other compatible substitutes include the LM339N and LM239N, though designers must verify differences in supply voltage ranges and quiescent currents to ensure circuit compatibility.