onsemi

MC74AC240DWG

MC74AC240DWG Description

The MC74AC240DWG from onsemi is a high-performance, inverting buffer integrated circuit (IC) designed for robust signal conditioning and logic-level conversion in digital systems. Part of the 74AC series, this device features dual 4-bit inverting buffers with a wide operating voltage range of 2V to 6V, making it suitable for mixed-voltage environments. Packaged in a 20-pin SOIC (Small Outline Integrated Circuit), it offers a compact footprint ideal for surface-mount applications. Despite its obsolete status, it remains a reliable choice for legacy designs due to its high-speed operation and low power consumption.

MC74AC240DWG Features

• Logic Type: Dual 4-bit inverting buffers for signal isolation and inversion.
• High Drive Capability: 24mA output current (sink/source) ensures strong signal integrity even under heavy loads.
• Wide Voltage Range: Operates from 2V to 6V, compatible with TTL and CMOS logic levels.
• Robust Construction: ROHS3 compliant and REACH unaffected, meeting environmental standards.
• Moisture Sensitivity Level (MSL) 3: Requires careful handling but allows 168 hours of exposure before baking.
• Low Propagation Delay: Optimized for high-speed applications, reducing signal latency.

MC74AC240DWG Applications

• Signal Buffering: Ideal for isolating and strengthening signals in data buses and memory interfaces.
• Logic Level Shifting: Facilitates interfacing between 3.3V and 5V systems in mixed-voltage designs.
• Industrial Control Systems: Used in PLC (Programmable Logic Controller) modules for reliable signal inversion.
• Automotive Electronics: Suitable for ECUs (Engine Control Units) where noise immunity and drive strength are critical.
• Legacy Equipment Maintenance: A go-to solution for repairing or upgrading older systems requiring 74AC-series compatibility.

Conclusion of MC74AC240DWG

The MC74AC240DWG stands out for its high drive capability, wide voltage range, and compact form factor, making it a versatile choice for digital signal conditioning. While marked as obsolete, its performance metrics—such as low propagation delay and 24mA output drive—ensure it remains relevant in industrial, automotive, and legacy applications. Engineers seeking a reliable inverting buffer with backward compatibility will find this IC a pragmatic solution despite newer alternatives.