CD74FCT821ATM

Overview

The CD74FCT821ATM is a FAST CMOS Bus Interface Register manufactured by Harris Corporation. It features a single function with an 8-bit width and true output polarity. The device utilizes a 24-pin Small Outline (SOP) package, specifically PDSO24, constructed from plastic/epoxy material. It operates within a temperature range of -40°C to 85°C and supports a nominal supply voltage of 5V. The component is classified as a registered bus transceiver with three-state outputs.

Feature Summary

• FAST CMOS technology for high-speed bus interfacing
• Registered bus interface functionality with true output
• Three-state output capability for efficient bus management

Applications

• High-speed data bus registration
• System memory interface control
• Peripheral device data buffering

Procurement Notes

Verify the manufacturer origin, as Harris Corporation's logic assets were acquired by Intersil and subsequently Renesas. Confirm RoHS compliance status, as original Harris variants may be non-compliant. Ensure the SOP24 package dimensions match the required PCB footprint. Validate that the specific suffix 'A' corresponds to the intended temperature grade and electrical specifications before finalizing procurement orders.

Selection Notes

Select this component when a registered 8-bit bus interface with true output polarity is required in a compact surface-mount form factor. The FCT series offers compatibility with standard logic families while providing faster switching speeds. Consider the 24-pin SOP package constraints and the -40°C to 85°C operating range against system environmental requirements. Verify power supply stability at 5V to ensure reliable three-state operation during bus transitions.

Part Context

This part belongs to the CD74FCT series of FAST CMOS logic devices produced by Harris Corporation. The series is designed for high-performance digital applications requiring fast propagation delays and low power consumption. As a bus interface register, it serves critical roles in managing data flow between processors and peripheral components in complex electronic systems.

Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation.