74ABT573CMTC

Overview

The Fairchild Semiconductor 74ABT573CMTC is an octal transparent D-type latch featuring three-state outputs, housed in a 20-lead TSSOP package. It operates within a supply voltage range of 4.5V to 5.5V and supports a maximum clock frequency of 200MHz. The device exhibits a typical propagation delay of 5ns at 5V with 50pF load capacitance. Output drive capabilities include sourcing 32mA and sinking 64mA, while static current consumption is specified at 50µA.

Feature Summary

• Octal transparent D-type latch architecture with buffered common latch enable and output enable inputs
• Three-state outputs designed for efficient bus interfacing applications
• Inputs and outputs positioned on opposite sides of the package to facilitate microprocessor interface routing

Applications

• Microprocessor input or output port buffering
• Bus-oriented memory mapping
• Register drives for high-speed data storage

Procurement Notes

Verify the specific manufacturer designation as Fairchild Semiconductor has been acquired by ON Semiconductor. Confirm that the component retains original Fairchild markings or check if it is distributed under the ON Semiconductor brand. Ensure the datasheet corresponds to the ABT logic family specifications rather than generic variants.

Selection Notes

Select this component when high-speed latching with significant drive capability is required. The ABT series offers superior speed compared to standard AC or ACT families. Verify that the 20-TSSOP package dimensions fit the PCB layout constraints and that the 5V supply rail matches the system requirements.

Part Context

This part belongs to the 74ABT logic family, which utilizes Advanced BiCMOS technology to achieve performance levels between Schottky TTL and standard CMOS. It is functionally similar to the 74AC573 but provides higher drive strength and faster switching speeds suitable for demanding digital systems.

Replacement Considerations

SN74ABT573ADBR from Texas Instruments serves as a direct functional substitute with identical electrical characteristics and pinout configuration.