CY74FCT821ATQCT

Overview

The CY74FCT821ATQCT is a 10-bit bus interface flip-flop manufactured by Texas Instruments, belonging to the FCT logic series. It features non-inverting polarity and TTL-compatible input/output levels. The device utilizes a 24-pin SSOP package for surface-mount installation. Electrical specifications include a maximum high-level output current of -32mA and a low-level output current of 64mA. Propagation delay is specified at 5.2 ns at 5V with a 50pF load. Operating conditions range from -40°C to +85°C, supported by a supply voltage between 4.75V and 5.25V.

Feature Summary

• Provides 10-bit data storage capability via D-type flip-flops with positive edge triggering.
• Integrates tri-state outputs to facilitate efficient bus interfacing and signal isolation.
• Ensures compatibility with TTL logic families through defined input and output voltage thresholds.

Applications

• High-density digital data storage in embedded systems
• Bus interface registers for microprocessor-based architectures
• Parallel-to-serial data conversion circuits

Procurement Notes

Verify the specific suffix 'TQCT' against official Texas Instruments documentation to confirm pinout and electrical characteristics match your design requirements. Ensure compliance with RoHS standards as indicated in distributor records. Confirm moisture sensitivity handling procedures are followed during assembly due to the component's classification.

Selection Notes

Select this component when a 10-bit width is required, distinguishing it from standard 8-bit variants like the CY74FCT373. Consider the SSOP package constraints for PCB layout density. Evaluate the propagation delay and drive strength against system timing budgets to ensure signal integrity at target clock frequencies.

Part Context

This part belongs to the CY74FCT family of fast CMOS logic devices produced by Texas Instruments. These components bridge the performance gap between older LS-TTL and modern CMOS technologies, offering high speed with TTL-compatible inputs. The FCT series is widely used in industrial and commercial applications requiring reliable digital logic functions.

Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided source material. Verify cross-references with manufacturer obsolescence notices or authorized distributors for equivalent FCT-series components with matching pinouts and electrical specs.