MC74LCX646DT

Overview

The MC74LCX646DT is a high-performance, non-inverting octal transceiver manufactured by onsemi. It operates within a supply voltage range of 2.3 V to 3.6 V. The device features eight bidirectional data paths and supports registered operation for synchronized data transfer. It utilizes CMOS technology for low power consumption and includes Schmitt-trigger inputs on all channels to ensure noise immunity. The component is housed in a surface-mount package suitable for automated assembly.

Feature Summary

• Provides eight bidirectional data transmission paths with registered output capability
• Incorporates Schmitt-trigger inputs on all channels for enhanced noise filtering
• Operates reliably across the 2.3 V to 3.6 V supply voltage range
• Supports non-inverting logic function for signal integrity preservation

Applications

• Portable systems requiring low-voltage operation
• Battery-powered consumer electronics
• Handheld devices with limited power budgets
• Communications equipment utilizing 3.3 V logic levels

Procurement Notes

Verify the specific suffix 'DT' indicates the tape-and-reel packaging configuration when ordering. Confirm that the 2.3 V to 3.6 V operating range aligns with the target system's power rails. Ensure compatibility with existing PCB footprints for the SOIC-20 or similar package variant specified in the official datasheet before finalizing procurement.

Selection Notes

Select this component when an octal bus interface with registered outputs is required at low voltages. It is appropriate for designs needing Schmitt-trigger input protection against signal noise. Consider the registered feature if synchronous data latching is necessary for timing alignment in high-speed serial or parallel interfaces within the specified voltage constraints.

Part Context

This part belongs to the LCX logic family from onsemi, designed for low-voltage applications. It serves as an octal transceiver, facilitating data movement between buses. The registered version allows for storage of data at the output, distinguishing it from standard unregistered transceivers. It complements other LCX components like buffers and gates in mixed-signal environments.

Replacement Considerations

Check for direct pin-compatible alternatives within the same LCX family. Verify that substitute parts support the 2.3 V to 3.6 V range and registered functionality. Ensure electrical characteristics such as propagation delay and drive current meet the original design requirements.