74ALVT16821DL,518

Overview

The 74ALVT16821DL,518 is a high-performance BiCMOS device from the Nexperia 74ALVT series. It functions as a 20-bit bus interface buffer and line driver designed for operation at 2.5 V or 3.3 V with I/O compatibility to 5 V. The component features two independent 10-bit sections, each coupled to a 3-state output buffer. It provides low static and dynamic power dissipation combined with high speed and high output drive capabilities. The device is housed in a 56-pin SSOP package.

Feature Summary

• Features two independent 10-bit registers coupled to 3-state output buffers
• Designed for 2.5 V or 3.3 V operation with 5 V I/O compatibility
• Provides high-speed performance with low static and dynamic power dissipation
• Incorporates high output drive capability for reliable signal transmission

Applications

• High-speed data bus buffering in digital systems
• Line driving applications requiring 5 V I/O compatibility
• Memory interface circuits operating at 2.5 V or 3.3 V
• General purpose 20-bit bus interface solutions

Procurement Notes

Verify the specific suffix '518' against official Nexperia documentation, as standard listings often reference '512'. Confirm current lifecycle status, as many ALVT devices are marked obsolete. Ensure the SSOP-56 package matches design requirements. Check RoHS compliance and moisture sensitivity levels before integration into production schedules.

Selection Notes

Select this component when designing systems requiring 20-bit parallel data transfer between voltage domains. It is suitable for interfaces bridging 3.3 V logic with 5 V peripherals. Consider the 56-pin SSOP footprint constraints. Evaluate thermal management needs due to high output drive currents. Verify clock frequency requirements align with ALVT propagation delays.

Part Context

This part belongs to the Nexperia 74ALVT family, which utilizes Advanced Low-Voltage BiCMOS Technology. This technology combines the speed of BiCMOS with the low power consumption of CMOS. The family targets applications needing fast switching speeds and robust drive strength while maintaining compatibility with standard low-voltage logic levels.

Replacement Considerations

Check for direct pin-compatible alternatives within the Nexperia portfolio. Verify if newer generations offer improved longevity. Ensure substitute parts maintain identical 3-state output behavior and 5 V tolerance. Confirm package dimensions match existing PCB footprints.