KA7405D

Overview

The KA7405D is a single analog switch manufactured by Fairchild Semiconductor, housed in a 16-SOIC surface-mount package. It operates on a single supply voltage ranging from 2V to 6V and supports dual supply configurations up to 6V. The device features one channel with an 8:1 multiplexer configuration. Key electrical characteristics include a maximum on-resistance of 230 Ohms, a bandwidth of 30 MHz, and a propagation delay of 60 ns. It functions within a temperature range of -40°C to +85°C.

Feature Summary

• Provides single-channel signal routing via an 8:1 multiplexer architecture
• Operates effectively across wide single and dual power supply ranges
• Supports high-speed signal transmission with defined bandwidth capabilities

Applications

• Data acquisition systems requiring signal selection
• Communication equipment for line switching
• Industrial control applications involving analog signal routing

Procurement Notes

Verify the manufacturer designation carefully, as Fairchild Semiconductor's semiconductor division was acquired by ON Semiconductor. Confirm that the component corresponds to the legacy Fairchild part number rather than a modern ON Semiconductor equivalent. Ensure the datasheet matches the specific suffix requirements for the SOIC-16 package and check for any RoHS compliance updates associated with the transition.

Selection Notes

Select this component when a single-channel analog switch with an 8:1 configuration is required. It is suitable for applications needing operation at low supply voltages down to 2V. Consider the 230 Ohm on-resistance limit for signal integrity requirements. Verify that the 16-SOIC package fits the board layout constraints and that the operating temperature range meets the environmental conditions.

Part Context

This component belongs to the 74HC series of CMOS logic devices, specifically designed as analog switches. It serves as a digital-to-analog interface element, allowing digital control signals to route analog inputs to a common output. The device is part of a broader family of multiplexer ICs used for managing multiple signal paths in electronic circuits.

Replacement Considerations

Due to corporate acquisitions, verify if ON Semiconductor offers direct cross-reference parts. Check pinout compatibility and electrical specifications against potential substitutes like the MM74HC4051WM or similar 74HC-based analog switches.