SN74AS573ADWR

Overview

The SN74AS573ADWR is an octal transparent D-type latch manufactured by Texas Instruments. It features three-state outputs and operates within a supply voltage range of 4.5 V to 5.5 V. The device provides a propagation delay of 5.7 ns and supports low-level output currents of 32 mA and high-level output currents of -32 mA. It functions in industrial temperature ranges from -40°C to +85°C and is housed in a 20-pin SOIC package.

Feature Summary

• Octal transparent D-type latch architecture with three-state outputs
• High-speed performance with 5.7 ns propagation delay
• Robust drive capability supporting 32 mA low-level and -32 mA high-level output currents

Applications

• Registering wide bus data in high-speed digital systems
• Buffering and driving high-capacitance loads on data buses
• Three-state memory applications requiring fast access times

Procurement Notes

Verify component authenticity through authorized channels as the SN74AS573ADWR is listed as obsolete. Confirm that substitute parts meet all electrical specifications, including the 4.5 V to 5.5 V operating range and 5.7 ns delay requirements. Ensure the replacement package matches the 20-SOIC form factor for physical compatibility.

Selection Notes

Select this component for designs requiring high-speed latching with strong drive capabilities at 5 V logic levels. The AS series offers faster switching than standard LS or HC families. Consider the obsolete status when planning long-term production runs and evaluate alternative AS series variants or modern equivalents if availability is critical.

Part Context

This part belongs to the Texas Instruments SN74AS573A family of octal latches. It utilizes Advanced Schottky technology to achieve superior speed compared to standard TTL counterparts. The device is designed for high-performance computing and communication equipment where rapid data capture and bus isolation are essential.

Replacement Considerations

SN74AS573ADW is a confirmed pin-compatible substitute available in tube packaging.