SN74AS821FN

Buffers, Drivers, Receivers, Transceivers Overview

The SN74AS821FN is a 10-bit bus interface flip-flop from Texas Instruments' AS logic series. It features registered data storage with tri-state outputs for bidirectional bus interfacing. The device operates within a supply voltage range of 4.5 V to 5.5 V and supports a maximum operating temperature of 70 °C. Packaged in a 28-lead Plastic Quad Flat Package (PQCC), it provides high-speed signal buffering and driving capabilities suitable for digital systems requiring reliable data latching and transmission.

Buffers, Drivers, Receivers, Transceivers Feature Summary

• Registered 10-bit data storage capability
• Tri-state output control for bus isolation
• High-speed AS series performance

Buffers, Drivers, Receivers, Transceivers Applications

• Bidirectional bus interface circuits
• Digital signal buffering and driving
• Data latching in computer systems

Buffers, Drivers, Receivers, Transceivers Procurement Notes

Verify the package type matches the required PQCC28 footprint. Confirm the suffix 'FN' corresponds to the specific lead finish and tape/reel or tube packaging configuration intended for the assembly process. Ensure the component meets RoHS compliance requirements if mandated by the end product regulations, as indicated in manufacturer documentation.

Buffers, Drivers, Receivers, Transceivers Selection Notes

Select this component when a 10-bit registered buffer with tri-state outputs is required. The AS series offers faster propagation delays compared to standard LS logic. Consider the 28-pin package size and the 5V supply requirement. Verify that the input voltage levels are compatible with the driving logic family used in the design.

Buffers, Drivers, Receivers, Transceivers Part Context

This part belongs to the Texas Instruments SN74AS series, which utilizes Advanced Schottky technology for improved speed and power dissipation characteristics. The SN74AS821 specifically addresses applications needing wide bus interfaces with storage, distinguishing it from non-registered drivers like the SN74AS241.

Buffers, Drivers, Receivers, Transceivers Replacement Considerations

Check for direct pin-compatible alternatives within the same AS series, such as the SN74AS821ANT, ensuring the package variant aligns with manufacturing constraints.