74LCXZ162244MEX

Overview

The onsemi 74LCXZ162244MEX is a low voltage 16-bit buffer and line driver featuring 5V tolerant inputs and outputs. It utilizes a 48-lead Thin Shrink Small Outline Package (TSSOP). The device operates within a supply voltage range of 2.7V to 3.6V, with an operating temperature range from -40°C to +85°C. It incorporates nominal 26/Ω to 58/Ω series resistors in the outputs to reduce overshoot and undershoot. Maximum propagation delay is 5.3 ns at VCC = 3.0V, with a maximum quiescent current of 20 µA.

Feature Summary

• Features 5V tolerant inputs and outputs for interfacing between low voltage logic and 5V signal environments.
• Includes integrated series resistors in the output path to minimize signal overshoot and undershoot.
• Provides guaranteed high impedance state during power-up or power-down to prevent bus loading.
• Supports live insertion and withdrawal operations without causing system glitches.

Applications

• Memory address drivers
• Clock drivers
• Bus oriented transmitter/receiver applications

Procurement Notes

Verify that the specific ordering suffix matches the required package type. Confirm the manufacturer origin, as this component was originally produced by Fairchild Semiconductor before its acquisition by onsemi. Ensure the datasheet revision aligns with your design requirements. Check for RoHS compliance status if mandated by your project specifications.

Selection Notes

Select this component when a 16-bit non-inverting buffer with 5V tolerance is required. It is suitable for systems needing nibble-controlled operation or full 16-bit functionality via shorted control pins. Consider the internal series resistors for EMI reduction and signal integrity improvements in high-speed digital designs.

Part Context

This part belongs to the LCXZ family of low voltage CMOS logic devices. It is functionally similar to other 16-bit buffers but distinguished by its specific 5V tolerance and integrated output resistance features. The device is designed to maintain low power dissipation while providing high-speed operation compatible with modern low voltage standards.

Replacement Considerations

Direct substitutes may include other 16-bit buffers with 5V tolerance and similar pinouts. Verify compatibility regarding package dimensions, electrical characteristics, and control logic. Cross-reference with equivalent parts from other manufacturers ensuring they meet the same voltage and speed specifications.

FAQ

How is the device controlled?

The device is nibble controlled, meaning it has four separate Output Enable (OE_n) inputs for each 4-bit group. These can be shorted together for full 16-bit operation.

What happens during power-up or power-down?

When VCC is between 0 and 1.5V, the device enters a high impedance state, preventing intermittent low impedance loading or glitching in bus-oriented applications.