AM29821APC

Overview

The AM29821APC is a 10-bit D-type flip-flop manufactured by Advanced Micro Devices in a DIP-24 package. It features 3-state outputs designed for driving highly capacitive or low-impedance loads, suitable for wider buffer registers and bidirectional bus drivers with parity. The device operates on positive clock transitions, with buffered control inputs to reduce DC loading. Outputs enter a high-impedance state during power-up/down and when disabled. Functionally equivalent to the SN54ALS29821, it supports supply voltages from 4.75V to 5.25V.

Feature Summary

• Features 3-state outputs specifically designed for driving highly capacitive or relatively low-impedance loads.
• Includes undershoot-protection circuitry on outputs to ensure signal integrity.
• Provides a power-up high-impedance state to prevent bus contention during initialization.
• Utilizes buffered control inputs to significantly reduce DC loading effects on control lines.

Applications

• Implementing wider buffer registers for data storage.
• Creating I/O ports for interface management.
• Designing bidirectional bus drivers with parity checking capabilities.
• Serving as working registers in digital logic circuits.

Procurement Notes

Verify that the component matches the specific AMD AM29821APC designation rather than generic equivalents. Confirm the package type is DIP-24 and check for RoHS compliance status if required by project specifications. Ensure the supplier provides genuine original IC stock documentation to guarantee authenticity and avoid counterfeit components.

Selection Notes

Select this component when a 10-bit edge-triggered D-type flip-flop with 3-state outputs is required. It is appropriate for applications needing high-speed performance with tpd ranging from 10-50ns. Consider its functional equivalence to the SN54ALS29821 for compatibility with existing designs requiring ALS technology characteristics.

Part Context

This part belongs to the family of advanced micro devices' bus interface triggers. It is functionally equivalent to the Texas Instruments SN54ALS29821. The device is categorized under trigger, latch, and register components, specifically designed for bus interface applications requiring multiple bits of data handling with tri-state output control.

Replacement Considerations

The SN54ALS29821 is documented as functionally equivalent to the AM29821. Verify pinout and electrical specifications match before substitution. No other public confirmed substitute part numbers are available in the provided source material.