74ABT573CMSAX

Overview

The Fairchild Semiconductor 74ABT573CMSAX is an octal transparent D-type latch featuring three-state outputs, belonging to the ABT logic series. It operates within a supply voltage range of 4.5V to 5.5V and supports a maximum clock frequency of 200 MHz. The device provides high drive capability with output currents of 32mA source and 64mA sink. It exhibits a typical propagation delay of 5ns at 5V with 50pF load and maintains low static current consumption of 50µA. The component is housed in a 20-SSOP package and functions across an industrial temperature range of -40°C to +85°C.

Feature Summary

• Octal transparent D-type latching architecture with buffered common latch enable input
• Three-state outputs designed for direct bus interfacing applications
• High-speed operation achieving 200 MHz clock frequencies
• Robust output drive capability supporting 32mA source and 64mA sink loads

Applications

• Memory address and data buffering in computer systems
• Clock distribution networks requiring high drive strength
• Bus-oriented transmitter and receiver circuits
• Microprocessor I/O port expansion modules

Procurement Notes

Verify the complete part number including the suffix CMSAX to ensure correct package type and manufacturer origin. Confirm RoHS compliance status through official documentation prior to integration. Check for obsolescence notices as this specific variant may be discontinued or superseded by newer revisions from the manufacturer.

Selection Notes

Select this component when designing systems requiring octal latching with high-speed performance and strong output drive capabilities. The ABT series offers superior speed compared to standard CMOS alternatives while maintaining lower power consumption than bipolar TTL equivalents. Ensure the design accommodates the 4.5V to 5.5V operating voltage range and utilizes appropriate termination for bus structures.

Part Context

This device belongs to the SN74ABT573 family of octal latches manufactured by Fairchild Semiconductor. It shares functional compatibility with other industry-standard octal latches but distinguishes itself through the ABT technology which combines BiCMOS speed with CMOS power efficiency. The component serves as a critical interface element between microprocessors and peripheral memory or I/O devices in digital logic designs.

Replacement Considerations

SN74ABT573ADBR (Texas Instruments)

FAQ

What is the maximum clock frequency supported by the 74ABT573CMSAX?

The device supports a maximum clock frequency of 200 MHz under specified operating conditions.

How does the output drive capability compare to standard logic families?

It provides 32mA source current and 64mA sink current, offering significantly higher drive strength than standard CMOS logic families.