SN74ALS573CDW

Overview

The SN74ALS573CDW is an octal transparent D-type latch manufactured by Texas Instruments, belonging to the ALS logic series. It features eight non-inverting outputs and operates within a supply voltage range of 4.5 V to 5.5 V. The device provides a propagation delay of 14 ns, with a low-level output current capability of 32 mA and a high-level output current of -2.6 mA. Designed for surface-mount applications, it is housed in a 20-pin SOIC package and supports an operating temperature range from 0°C to +70°C.

Feature Summary

• Octal transparent D-type latch architecture providing eight independent data storage channels
• High-drive output stage capable of sourcing significant low-level current for bus interfacing
• Surface-mount construction utilizing a compact 20-pin small-outline integrated circuit package

Applications

• Parallel-to-serial data conversion circuits
• Bus-oriented memory address latching
• General-purpose register storage in digital systems

Procurement Notes

Verify the specific ordering suffix against manufacturer documentation to confirm package type and tape-and-reel specifications. Ensure the component meets required RoHS compliance standards for the intended market. Confirm that the supply voltage and load conditions align with the specified electrical characteristics before integration into the final design.

Selection Notes

Select this component when an octal latch with high drive strength is required for bus applications. The ALS series offers faster switching speeds compared to standard LS logic while maintaining compatible pinouts. Verify that the surface-mount footprint matches the PCB layout constraints and that the thermal performance suits the operational environment.

Part Context

This part belongs to the Texas Instruments SN74ALS573 family of octal latches. It serves as a surface-mount variant of the through-hole SN74ALS573N, offering equivalent electrical performance in a smaller form factor. The device is designed for use in systems requiring parallel data storage and subsequent serial transmission or bus isolation.

Replacement Considerations

The SN74ALS573BDW is a verified substitute part number offering identical functionality in a different surface-mount package variant.