74LCXH162244MEA

Overview

The onsemi 74LCXH162244MEA is a low-voltage 16-bit buffer and line driver featuring non-inverting outputs with 3-STATE control. It utilizes advanced CMOS technology for high-speed operation while maintaining low power dissipation. The device operates within a supply voltage range of 2.0V to 3.6V, providing 5V tolerant inputs and outputs for interfacing in mixed-voltage environments. Key electrical characteristics include a maximum propagation delay of 5.3ns at VCC = 3.0V, output drive capability of up to 12mA, and quiescent supply current of 20µA max. It incorporates active bus-hold circuitry on data inputs and equivalent series resistors in outputs.

Feature Summary

• Integrates active bus-hold circuitry on all data inputs to maintain valid logic levels without external pull-up or pull-down resistors.
• Features outputs with built-in equivalent series resistance to minimize signal overshoot and undershoot, eliminating the need for external termination components.
• Provides 5V tolerant input and output terminals, enabling safe interface between low-voltage logic and 5V signal environments.
• Supports nibble-controlled operation via four independent Output Enable (OE_n) inputs, allowing flexible partial or full 16-bit bus management.

Applications

• Memory address drivers
• Clock drivers
• Bus-oriented transmitters and receivers

Procurement Notes

Verify that the ordering suffix 'MEA' corresponds specifically to the MS48A package variant, which is the 48-Lead Small Shrink Outline Package (SSOP). Confirm that the component meets the required JEDEC MO-118 standard dimensions. Ensure the procurement source provides documentation confirming compliance with the specified operating temperature range of -40°C to +85°C.

Selection Notes

Select this component when designing systems requiring 16-bit data buffering with mixed 3.3V/5V voltage domains. The integrated bus-hold feature simplifies PCB layout by removing external resistor requirements for unused pins. The low quiescent current makes it suitable for battery-operated applications where power efficiency is critical alongside high-speed data transmission capabilities.

Part Context

This device belongs to the LCXH family of low-voltage CMOS logic devices. It is functionally compatible with standard 74-series logic but optimized for lower voltage operations. The specific part number indicates the manufacturer's designation for the SSOP package version of this 16-bit buffer, distinguishing it from other package options like TSSOP available in the same product line.

Replacement Considerations

Check datasheets for cross-reference parts offering identical 16-bit configuration, 3-STATE outputs, and 5V tolerance. Verify pin compatibility and ensure replacement devices support the same 2.3V–3.6V operating voltage range and bus-hold functionality.

FAQ

How does the bus-hold feature affect unused inputs?

The active bus-hold circuitry automatically holds unused or floating data inputs at a valid logic level, eliminating the need for external pull-up or pull-down resistors.

What is the purpose of the series resistors in the outputs?

The outputs include equivalent series resistance designed to reduce overshoot and undershoot on the signal lines, making external termination resistors unnecessary.