MC74LVX244MELG

Overview

The MC74LVX244MELG is an octal buffer and line driver manufactured by onsemi, belonging to the LVX logic series. It features a low-voltage CMOS design with three-state outputs and non-inverting functionality. The device operates within a supply voltage range of 1.65V to 3.6V and supports 5V-tolerant inputs and outputs. It utilizes a 20-lead SSOP package for surface-mount installation. Key electrical parameters include a propagation delay of 9ns at 3.3V and 7ns at 5V, with output drive currents of 24mA high and low. The quiescent current is typically 8µA, and it functions reliably across an operating temperature range of -40°C to +85°C.

Feature Summary

• Provides eight channels of buffering with independent output enable controls for flexible bus management.
• Features 5V-tolerant inputs and outputs, allowing safe interfacing between low-voltage and 5V logic systems.
• Offers three-state outputs to prevent bus contention when multiple devices share a common data line.
• Utilizes low-voltage CMOS technology to achieve high-speed performance while maintaining low power consumption.

Applications

• Memory address driving in portable electronic devices
• TTL-to-LVCMOS level translation interfaces
• Bus-oriented communications systems requiring signal isolation
• Clock distribution networks for low-voltage digital circuits

Procurement Notes

Verify the specific suffix 'MELG' against the manufacturer's official datasheet to confirm the exact package type and tape-and-reel specifications. Ensure that the 5V tolerance ratings align with your system's input voltage requirements. Check for RoHS compliance status and environmental declarations if required for your manufacturing process. Confirm availability of the obsolete or active status through authorized distributors.

Selection Notes

Select this component when designing systems that require interface bridging between 3.3V or lower logic families and legacy 5V TTL components. The octal configuration reduces board space compared to using individual single-buffer ICs. Consider the 9ns propagation delay for timing-critical applications and ensure the 24mA drive capability meets the load requirements of the destination circuitry without exceeding power dissipation limits.

Part Context

This part belongs to the MC74LVX family of low-voltage CMOS logic devices from onsemi. The LVX series is designed for high-speed operation with reduced power consumption compared to standard CMOS technologies. It is commonly used in battery-powered applications where efficient power management and fast switching speeds are critical. The octal buffer variant provides extensive I/O expansion capabilities in a compact form factor.

Replacement Considerations

Direct substitutes may include other octal buffers with similar voltage tolerances and package types. Verify pin compatibility and electrical characteristics such as propagation delay and output drive strength before substitution. Alternative packages like SOIC or TSSOP may require adapter solutions if footprint changes are acceptable.