MC74LCX244DT

Overview

The MC74LCX244DT is a low-voltage CMOS octal buffer and line driver manufactured by onsemi. It features eight non-inverting buffers with three-state outputs, designed for operation at 2.5V or 3.3V VCC while providing 5V tolerant inputs and outputs. The device utilizes advanced CMOS technology to achieve high-speed performance with low power dissipation. Key electrical specifications include a maximum propagation delay of 6.5 ns at 3.3V, a maximum quiescent current of 10 µA, and an output drive capability of ±24 mA at 3.0V. It supports live insertion and withdrawal, implements noise reduction circuitry, and offers robust latch-up protection exceeding 500 mA.

Feature Summary

• Provides five-volt tolerant input and output interfaces for mixed-voltage system compatibility
• Features three-state outputs to support bus-oriented transmission and memory addressing applications
• Incorporates patented noise and EMI reduction circuitry for signal integrity

Applications

• Memory address drivers
• Clock drivers
• Bus-oriented transmitter/receiver circuits

Procurement Notes

Verify the specific suffix 'DT' corresponds to the TSSOP-20 surface-mount package configuration. Confirm RoHS compliance status as historical data indicates potential variations in environmental declarations for older manufacturing runs. Ensure the component meets the required operating temperature range and moisture sensitivity levels for the intended assembly process.

Selection Notes

Select this component when interfacing low-voltage logic with 5V environments is required. The MC74LCX244DT is suitable for designs needing high-speed buffering with minimal power consumption. Consider the three-state functionality for bus sharing applications. Verify that the 6.5 ns propagation delay meets the timing constraints of the target system architecture.

Part Context

This part belongs to the 74LCX family of low-voltage CMOS logic devices from onsemi. It is functionally compatible with other manufacturers' 74LCX244 variants, such as those from Fairchild Semiconductor or STMicroelectronics. The device serves as a standard solution for level shifting and buffering in portable and battery-powered electronics requiring 3.3V or 2.5V operation.

Replacement Considerations

Direct substitutes include equivalent parts from other vendors within the 74LCX244 family, provided they maintain the same pinout and electrical characteristics. Verify package compatibility and ensure any alternative meets the 5V tolerance and three-state output requirements.