SN74ALS573CDB

Overview

The SN74ALS573CDB is an octal D-type transparent latch with 3-state outputs manufactured by Texas Instruments. It operates within a supply voltage range of 4.5 V to 5.5 V and features a propagation delay of 14 ns. The device provides a low-level output current of 24 mA and a high-level output current of -2.6 mA. It supports eight independent circuits in a 20-SSOP surface-mount package, with an operating temperature range of 0°C to +70°C.

Feature Summary

• Octal D-type transparent latch architecture with 3-state outputs
• Non-inverting logic polarity for direct data bus interfacing
• Surface-mount SSOP-20 packaging for compact board integration

Applications

• System data bus buffering
• Register storage in digital logic circuits
• High-speed data transfer interfaces

Procurement Notes

Verify the specific suffix designation when sourcing replacements, as the 'C' variant denotes commercial temperature range specifications. Confirm that the target component matches the 20-SSOP physical footprint and pinout configuration to ensure mechanical compatibility. Cross-reference electrical parameters such as output drive strength against system requirements before finalizing procurement decisions.

Selection Notes

Select this component for applications requiring octal latching with tri-state control capabilities. Ensure the design accommodates the specified 4.5 V to 5.5 V supply voltage window. Consider the 14 ns propagation delay for timing analysis in high-speed digital systems. Verify that the thermal environment remains within the 0°C to +70°C operational limits for reliable performance.

Part Context

This part belongs to the SN74ALS series of advanced low-power Schottky logic devices. It serves as a standard octal latch solution for general-purpose digital electronics. The device complements other ALS family components by providing high-speed data storage and bus isolation functions in a compact surface-mount form factor suitable for modern PCB designs.

Replacement Considerations

SN74ALS573CDBR is listed as a manufacturer-recommended substitute.