MC74HC240AFR2

Overview

The MC74HC240AFR2 is an octal inverting buffer and line driver manufactured by ON Semiconductor, formerly Motorola. It features eight independent inputs with three-state outputs, housed in a 20-SOIC package (0.209 inch width). The device operates on a supply voltage range of 2V to 6V. Key electrical parameters include a high-level output current of -7.8 mA and a low-level output current of 7.8 mA. Static current is specified at 8 uA, with a maximum operating temperature of +85°C and a minimum of -40°C.

Feature Summary

• Provides octal buffering and line driving capabilities with inverting logic functions.
• Features three-state outputs for effective bus-oriented communication and system isolation.
• Supports surface mount installation via a compact 20-SOIC package format.

Applications

• Bus-oriented systems requiring signal buffering
• Clock distribution networks
• Memory address decoding circuits

Procurement Notes

Verify the manufacturer origin carefully, as this component was originally a Motorola product but is now produced by ON Semiconductor. Confirm the specific suffix 'AFR2' corresponds to the required tape-and-reel packaging and temperature grade. Ensure the part status is active before procurement to avoid obsolescence risks during production runs.

Selection Notes

Select this component when an octal inverting buffer with three-state control is required for digital logic interfaces. It is suitable for applications needing high noise immunity and low power consumption within the HC series specifications. Consider the SOIC package constraints for PCB layout and thermal management requirements.

Part Context

This component belongs to the 74HC series of high-speed CMOS logic devices. Originally developed under the Motorola brand, production rights were transferred to ON Semiconductor. The MC74HC240 variant specifically provides eight channels of inversion, distinguishing it from non-inverting counterparts like the MC74HC244.

Replacement Considerations

Compatible substitutes include SN74HC240AN from Texas Instruments and MC74HC240ADTR2G from ON Semiconductor. Verify pin compatibility and electrical characteristics match before substitution.