SN74AHCT573DWRG4

Overview

The SN74AHCT573DWRG4 is an octal transparent D-type latch with three-state outputs manufactured by Texas Instruments. It operates within a voltage range of 4.5 V to 5.5 V and features a 20-pin SOIC package. Key electrical parameters include a propagation delay of 18 ns at 5 V, a static current of 20 µA, and output drive capabilities of 6 mA for both high and low states. The device supports an operating temperature range from -40°C to +85°C.

Feature Summary

• Octal transparent D-type latch architecture providing eight independent data storage elements
• Three-state outputs designed for direct bus interfacing and system flexibility
• High-speed performance optimized for synchronous digital applications
• Wide supply voltage compatibility with standard 5 V logic systems

Applications

• Register files in microprocessor-based systems
• Buffered memory address latches
• Portable equipment requiring low power consumption
• Consumer products utilizing CMOS technology

Procurement Notes

Verify the complete part number including the G4 suffix to ensure compliance with RoHS directives and lead-free manufacturing standards. Confirm the SOIC-20 package dimensions match your PCB footprint requirements. Check the datasheet for specific operating conditions and thermal characteristics relevant to your design environment.

Selection Notes

Select this component when an octal latch with three-state control is required for 5 V logic interfaces. Compare propagation delays and output drive currents against system timing constraints. Ensure the operating temperature range meets environmental specifications. Consider pinout compatibility with existing designs if replacing older variants.

Part Context

This device belongs to the SNx4AHCT573 family of octal transparent D-type latches with three-state outputs. It is part of Texas Instruments' broader portfolio of high-speed CMOS logic devices designed for demanding digital applications. The family offers various speed and power trade-offs for different system requirements.

Replacement Considerations

Compatible substitutes include SN74HCT573DWR and SN74HC573DWR. Verify voltage level compatibility and switching speed differences before substitution. Ensure pin configurations remain identical to avoid board redesign.