KA339ADTF

Overview

The KA339ADTF is a quad analog comparator manufactured by Fairchild Semiconductor, housed in a surface-mount SOIC-14 package. It operates within a supply voltage range of 18 V to 36 V and draws a typical operating current of 2 mA. The device features open collector outputs capable of sourcing 18 mA per channel. Key electrical specifications include a response time of 1.3 µs, an input offset voltage of 4 mV, and an input bias current of 250 nA. It functions reliably across a temperature range of 0°C to +70°C with a power dissipation rating of 570 mW.

Feature Summary

• Integrates four independent high-gain comparators into a single compact surface-mount package for space-constrained designs.
• Provides open-collector output configuration allowing flexible interfacing with various logic families and voltage levels.
• Operates on a wide single-supply voltage range suitable for diverse industrial and commercial applications.

Applications

• General-purpose voltage monitoring and threshold detection circuits
• Over-voltage protection systems requiring precise switching thresholds
• Industrial control logic interfaces for signal conditioning

Procurement Notes

Verify the manufacturer designation carefully, as this component was originally produced by Fairchild Semiconductor before its acquisition by onsemi. Confirm that the specific suffix matches the required tape-and-reel packaging format. Ensure compliance with current RoHS directives and check for any obsolescence notices from the current rights holder regarding long-term availability.

Selection Notes

Select this component when a quad comparator solution is required in a small outline integrated circuit package. It is suitable for designs needing open-collector outputs and operation up to 36 V. Consider the 1.3 µs response time and 4 mV offset voltage for precision requirements. Verify thermal management capabilities given the 570 mW power dissipation limit in the specified package.

Part Context

This part belongs to the KA339 family of quad comparators, widely used in linear and switching applications. The 'ADTF' suffix typically denotes a specific tape-and-reel packaging variant intended for automated assembly processes. The device serves as a cost-effective solution for multi-channel comparison tasks in consumer electronics and industrial equipment.

Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation. Cross-reference with LM339 variants or other quad comparators only if pin compatibility and electrical parameters are verified against official datasheets.