74ALVT16821DGG512

Overview

The 74ALVT16821 is a 20-bit bus-interface D-type flip-flop manufactured by NXP USA Inc. It features positive-edge triggering and 3-state outputs, designed for operation at 2.5 V or 3.3 V with I/O compatibility to 5 V. The device integrates two independent 10-bit registers, each coupled to a 3-state output buffer. Control gates for clock (nCP) and output enable (nOE) allow independent section management. It utilizes BiCMOS technology for low power dissipation and high speed, housed in a 56-pin SSOP package.

Feature Summary

• Integrates two independent 10-bit edge-triggered registers within a single 20-bit interface
• Provides 3-state outputs controlled by dedicated nCP and nOE gates for flexible bus management
• Ensures I/O compatibility between 2.5 V/3.3 V logic levels and 5 V systems

Applications

• High-speed data acquisition systems requiring parallel input storage
• Bus-oriented memory mapping applications
• Clocked buffer interfaces for bidirectional data transmission

Procurement Notes

Verify the specific manufacturer designation, as Nexperia acquired NXP's Logic division. Confirm that the part number corresponds to the correct RoHS compliance status and lead time requirements. Ensure the 56-pin SSOP package matches the PCB footprint design specifications before finalizing procurement orders.

Selection Notes

Select this component when designing systems requiring 20-bit parallel data latching with 3-state control. It is suitable for applications needing direct 5 V tolerance on inputs while operating from lower voltage supplies. Consider the propagation delay characteristics and power consumption profiles relative to system timing constraints.

Part Context

This device belongs to the ALVT series of advanced low-voltage TTL-compatible logic products. It represents a specialized solution for high-density bus interfacing, combining flip-flop functionality with bus driver capabilities. The series is engineered for industrial and commercial environments requiring reliable data retention and fast switching speeds.

Replacement Considerations

The SN74ALVT16821 from Texas Instruments serves as a public confirmed substitute part number. Verify pinout compatibility and electrical parameter alignment before implementation.