KA393ADTF

Overview

The KA393ADTF is a dual differential comparator manufactured by Fairchild Semiconductor. It features an open-collector output configuration and operates within a supply voltage range of 2V to 36V single supply or ±1V to ±18V dual supply. The device includes internal compensation for stability and supports input offset voltages up to 5mV at 5V. It is housed in an 8-SOIC surface-mount package with a width of 0.150 inches (3.81mm). The component is designed for general-purpose comparison tasks across industrial temperature ranges.

Feature Summary

• Dual differential comparator architecture providing two independent comparison channels
• Open-collector output stage compatible with various logic families
• Wide single-supply operating voltage range from 2V to 36V
• Internal frequency compensation ensures stable operation without external components

Applications

• Over/under voltage detection circuits
• Window comparator configurations
• Level shifting applications
• Logic interface between analog sensors and digital systems

Procurement Notes

Verify the manufacturer marking and date code against official Fairchild Semiconductor documentation to ensure authenticity. Confirm that the suffix ADTF corresponds to the specified 8-SOIC package variant. Check for RoHS compliance status if required by your manufacturing standards. Ensure storage conditions meet moisture sensitivity level requirements prior to soldering.

Selection Notes

Select this component when a dual-channel comparator with wide supply voltage tolerance is required. The open-collector output allows flexible pull-up resistor selection for different logic levels. Consider thermal dissipation requirements if driving significant loads. Verify pinout compatibility with existing PCB layouts before finalizing the design.

Part Context

The KA393 series belongs to Fairchild's family of low-power dual comparators. It serves as a functional equivalent to industry-standard LM393 devices. The ADTF suffix denotes the specific tape-and-reel packaging format suitable for automated assembly processes. This part is widely used in consumer electronics, industrial controls, and power management systems.

Replacement Considerations

Direct substitutes include LM393N, LM393DR, and MC33034DR2G. Verify pin compatibility and electrical specifications match before substitution. Some alternatives may offer improved speed or lower power consumption but require layout adjustments.