SN74AHCT573DW

Overview

The SN74AHCT573DW is an octal transparent D-type latch manufactured by Texas Instruments, belonging to the AHC logic family. It features eight independent D-type latches with true outputs and operates within a supply voltage range of 4.5 V to 5.5 V. The device utilizes a 20-pin SOIC package and supports surface-mount installation. Key electrical characteristics include a propagation delay of 9.5 ns, a maximum static current of 4 uA, and output drive capabilities of 32 mA for low-level and -8 mA for high-level states. It functions reliably across an extended temperature range from -40°C to +85°C.

Feature Summary

• Provides eight independent transparent D-type latches with non-inverting outputs
• Features TTL-compatible inputs for direct interfacing with standard logic systems
• Maintains data integrity by latching Q outputs when the enable input transitions to a low state

Applications

• Registering fast-counting signals in digital circuits
• Performing parallel-to-serial conversion tasks
• Driving bus-oriented memory registers

Procurement Notes

Verify the specific suffix 'DW' confirms the SOIC-20 surface-mount package configuration. Ensure the 'T' designation indicates TTL-compatible input levels suitable for 5V logic interfaces. Confirm RoHS compliance status through official manufacturer documentation prior to integration into regulated assemblies.

Selection Notes

Select this component when TTL-compatible inputs are required alongside the speed and low power consumption of the AHC series. It serves as a functional alternative to standard 74HCT573 devices while offering improved performance metrics. Verify that the 5V-only operating voltage aligns with the target system's power distribution architecture.

Part Context

This part belongs to the SN74AHC573 family of octal transparent D-type latches. The family provides robust performance with wide operating voltage ranges and low power dissipation. The SN74AHCT573 variant specifically bridges the gap between advanced CMOS technology and legacy TTL logic standards.

Replacement Considerations

SN74AHCT573DWR is available as a reel-packaged equivalent. SN74AHCT573N offers a PDIP-20 through-hole alternative. SN74ACT573DWR provides a similar function but requires a higher minimum supply voltage.