74FCT573ASCX

Latches Overview

The 74FCT573ASCX is an octal transparent D-type latch with 3-state outputs manufactured by National Semiconductor. It belongs to the FCT series and features a true output configuration. The device operates within a supply voltage range of 4.75 V to 5.25 V, with a nominal rating of 5 V. It utilizes CMOS technology and is housed in a 20-lead SOIC package. Key electrical characteristics include a maximum propagation delay of 8.5 ns and a load capacitance specification of 50 pF.

Latches Feature Summary

• Provides eight independent transparent D-type latching channels for data storage applications.
• Features three-state outputs allowing direct connection to bus systems without external drivers.
• Utilizes FCT CMOS technology to ensure high-speed operation with low power consumption.

Latches Applications

• High-speed data buffering in digital communication systems
• Register files in microprocessor-based designs
• Parallel-to-serial conversion circuits

Latches Procurement Notes

Verify the manufacturer designation as National Semiconductor or its successor Texas Instruments, as corporate acquisitions may affect branding on legacy components. Confirm the specific suffix 'ASCX' corresponds to the SOIC package and tape-and-reel shipping format. Ensure compliance with current RoHS directives if required for the target assembly process.

Latches Selection Notes

Select this component when an octal latch with tri-state capability is required for bus interfacing. The FCT logic family offers faster switching speeds compared to standard TTL equivalents while maintaining compatible voltage levels. Consider the SOIC package dimensions for PCB layout constraints and verify that the 50 pF load capacitance matches the downstream circuit requirements.

Latches Part Context

This part is part of the widely used 74xx logic family, specifically the Fast CMOS (FCT) subset designed for improved performance over earlier generations. National Semiconductor was a primary producer of these logic ICs before being acquired by Texas Instruments. The 74FCT573 variant serves as a standard solution for temporary data storage in digital logic designs requiring parallel access.

Latches Replacement Considerations

The SN74FCT573SC from Texas Instruments is a confirmed equivalent part number. Verify pinout compatibility and electrical specifications before substitution. Other variants such as the 74FCT573AFC are functionally similar but differ in package type.