74ALVC16821MTD

Overview

The Fairchild Semiconductor 74ALVC16821MTD is a 20-bit bus-interface D-type flip-flop featuring positive-edge triggering and three-state outputs. It operates within a supply voltage range of 1.65V to 3.6V, ensuring compatibility with low-voltage logic systems. The device is housed in a 56-pin TSSOP package, providing a compact solution for high-density digital designs. It supports data storage and transfer across dual ports, facilitating efficient bus management in mixed-voltage environments.

Feature Summary

• Provides 20-bit data storage capability through dual 10-bit sections
• Features positive-edge clock triggering for precise timing control
• Includes three-state outputs to manage bus contention effectively
• Supports low-voltage operation compatible with 1.65V to 3.6V supplies

Applications

• High-speed data buffering in memory interface circuits
• Clock distribution networks requiring precise edge triggering
• Bus transceiver systems managing bidirectional data flow
• Digital signal processing modules handling parallel data streams

Procurement Notes

Verify the manufacturer designation carefully, as the part number prefix may vary between Fairchild Semiconductor and onsemi due to corporate acquisition history. Confirm that the specific suffix matches the required package type and temperature rating. Ensure compliance with current environmental standards by checking RoHS status documentation. Cross-reference the ordering information against official distributor catalogs to avoid counterfeit components or incorrect revisions.

Selection Notes

Select this component when designing systems requiring 20-bit parallel data latching with minimal propagation delay. The three-state output feature allows multiple devices to share a common bus without electrical conflicts. Consider the operating voltage range to ensure compatibility with both 1.8V and 3.3V logic levels. Evaluate the thermal performance and pin count to determine if the TSSOP-56 package fits the available PCB space constraints.

Part Context

This device belongs to the ALVC (Advanced Low-Voltage CMOS) family, known for high speed and low power consumption. It serves as a critical interface element in modern digital electronics, bridging different voltage domains. The 74ALVC series is widely adopted in telecommunications and computing infrastructure where reliable data retention and fast switching speeds are mandatory for system stability.

Replacement Considerations

Public confirmed substitute part numbers: 74ALVC16821MTX.