KA339D

Overview

The KA339D is a quad analog comparator manufactured by Fairchild Semiconductor. It features four independent high-gain comparators designed for general-purpose applications. The device operates with a single power supply ranging from 2V to 36V or dual supplies up to ±18V. It utilizes an open-collector output configuration, allowing flexible interfacing with various logic families. The component is housed in a standard DIP-14 package and supports commercial temperature ranges.

Feature Summary

• Integrates four independent high-gain voltage comparators within a single integrated circuit
• Supports operation from a single power supply or split dual power supplies
• Features open-collector outputs compatible with TTL, CMOS, MOS, and ECL logic families

Applications

• Voltage monitoring systems
• Level detection circuits
• Peak hold circuits
• Time delay generation

Procurement Notes

Verify the manufacturer designation as Fairchild Semiconductor during sourcing. Confirm the specific package type corresponds to the DIP-14 form factor. Ensure the component meets the required operating temperature range for the intended application environment before finalizing procurement decisions.

Selection Notes

Select this component when a multi-channel comparison solution is required without external logic interfacing constraints. The open-collector output simplifies connection to different voltage levels. Consider the quiescent current and propagation delay specifications relative to the system speed requirements.

Part Context

This part belongs to the KA339 series of quad comparators. It serves as a direct functional equivalent to industry-standard LM339 devices. The series is widely utilized in industrial control and consumer electronics for signal conditioning and threshold detection tasks.

Replacement Considerations

The LM339DR2G is a confirmed substitute part number available from onsemi. Verify pin compatibility and electrical parameter alignment before implementation.