MC74LCX244DWR2

Overview

The MC74LCX244DWR2 is a low-voltage CMOS octal buffer and line driver manufactured by onsemi. It features eight non-inverting channels with three-state outputs, designed for high-speed data transmission. The device operates within a supply voltage range of 2V to 5.5V, ensuring compatibility with various logic families. Key electrical characteristics include output drive currents of 24mA for both high and low states, with a typical propagation delay of 10ns at 3.3V and 7ns at 5V. It supports 5V-tolerant inputs and outputs, making it suitable for mixed-voltage systems.

Feature Summary

• Provides eight independent non-inverting buffer channels for signal conditioning and bus interfacing.
• Features three-state outputs that allow direct connection to bus lines without additional drivers.
• Incorporates 5V tolerance on both inputs and outputs to facilitate safe operation in mixed-voltage environments.

Applications

• Memory module address and data bus buffering
• Clock distribution networks requiring high fan-out
• Portable equipment utilizing low-voltage power supplies

Procurement Notes

Verify the complete part number suffix, as 'DWR2' may indicate specific tape-and-reel packaging or regional variants distinct from standard 'DWR2G'. Confirm RoHS compliance status through official datasheets. Ensure the ordering code matches the exact package width and lead finish requirements for your assembly process.

Selection Notes

Select this component when designing circuits that require driving multiple loads from a single source while maintaining signal integrity. The 5V tolerance feature is critical for interfaces between 3.3V logic controllers and 5V peripherals. Consider the 24mA drive capability for moderate capacitive loads typical in consumer electronics.

Part Context

This part belongs to the 74LCX series of low-voltage CMOS logic devices. It serves as an octal version of the widely used 74xx244 buffer family, offering improved speed and lower power consumption compared to older HC/HCT technologies. It is commonly found in digital communication interfaces and microcontroller peripheral expansion circuits.

Replacement Considerations

Direct pin-compatible substitutes include MC74LCX244DWG and MC74LCX244ADTR2G. Verify that replacement parts maintain the same 5V tolerance specifications and package dimensions (SOIC-20) to ensure mechanical and electrical compatibility without redesigning the PCB footprint.