MC74HC573AFELG

Latches Overview

The MC74HC573AFELG is an octal 3-state noninverting transparent latch manufactured by onsemi. It operates within a DC supply voltage range of 2.0 to 6.0 V and supports an operating free-air temperature from -55°C to +125°C. The device features low input current of 1 µA and high noise immunity characteristic of CMOS devices. It provides output drive capability for 15 LSTTL loads and interfaces directly with CMOS, NMOS, and TTL outputs. The chip complexity consists of 234 FETs or 58.5 equivalent gates.

Latches Feature Summary

• Octal 3-state noninverting transparent latch functionality
• Direct interface compatibility with CMOS, NMOS, and TTL outputs
• High noise immunity characteristic of CMOS devices

Latches Applications

• Data storage in digital systems
• Interface between logic families
• PC board layout facilitation via separated I/O sides

Latches Procurement Notes

Verify the specific suffix 'FELG' against official ordering information as it may denote specialized packaging or automotive qualification not explicitly detailed in standard listings. Confirm RoHS compliance and Pb-free status through manufacturer documentation. Ensure application requirements align with the HC series voltage and speed specifications rather than HCT variants.

Latches Selection Notes

Select this component when an octal latch with 3-state output control is required for CMOS-based designs. It serves as a pinout-compatible alternative to LS573 devices while offering improved performance characteristics. Consider the separated data input and output pin arrangement for optimized printed circuit board routing efficiency.

Latches Part Context

This part belongs to the MC74HC573A family of octal latches. It shares functional similarities with the HC373A but differs in pinout configuration to aid layout. The device is part of onsemi's high-performance silicon-gate CMOS product line, designed for general-purpose digital applications requiring reliable data latching and bus isolation capabilities.

Latches Replacement Considerations

MC74HC573ADWG

Latches FAQ

How does the MC74HC573AFELG differ functionally from the MC74HCT573A?

The MC74HC573AFELG operates over a wider voltage range (2.0V to 6.0V) compared to the MC74HCT573A (4.5V to 5.5V). Additionally, the HC variant has different input threshold levels suitable for standard CMOS outputs, whereas the HCT variant is optimized for TTL/NMOS interfacing.

What is the significance of the data inputs being on the opposite side of the package from the outputs?

This pinout arrangement facilitates PC board layout by allowing easier routing between input and output traces, reducing crosstalk and simplifying design compared to devices where inputs and outputs are on the same side.