SN74HCT573NSR

Latches Overview

The SN74HCT573NSR is an octal transparent D-type latch manufactured by Texas Instruments. It operates within a supply voltage range of 4.5 V to 5.5 V and features eight non-inverting outputs with three-state capability. The device utilizes HCT logic, ensuring TTL-compatible inputs while maintaining CMOS low power consumption characteristics. Key electrical parameters include a propagation delay of 52 ns at 4.5 V and 47 ns at 5.5 V, along with a static current of 8 uA. It provides a low-level output current of 32 mA and a high-level output current of -6 mA. The component is housed in a 20-pin SOIC package and supports surface mount installation.

Latches Feature Summary

• Octal configuration providing eight independent transparent D-type latches for parallel data storage
• Three-state outputs allowing direct connection to system buses without external drivers
• HCT logic compatibility enabling operation with standard TTL input levels

Latches Applications

• Parallel data buffering in digital communication systems
• Address latching for memory interface circuits
• General-purpose register applications in embedded controllers

Latches Procurement Notes

Verify the specific suffix 'SR' against the manufacturer's official documentation to confirm tape and reel packaging specifications. Ensure the order matches the exact part number required for your bill of materials, as variations in suffixes may indicate different packaging or environmental ratings. Cross-reference the datasheet revision date to confirm the technical parameters align with your design requirements before finalizing procurement.

Latches Selection Notes

Select this component when designing systems requiring multiple parallel data storage elements with bus-compatible interfaces. The HCT series ensures compatibility with legacy TTL logic families while offering improved power efficiency compared to older standards. Consider the 20-pin SOIC package dimensions for PCB layout constraints and verify that the operating temperature range meets the environmental conditions of the intended application environment.

Latches Part Context

This component belongs to the SN74HCT573 family of octal transparent latches. It serves as a fundamental building block for digital logic designs requiring data retention and bus isolation. The HCT variant specifically bridges the gap between CMOS technology and TTL logic levels, making it suitable for mixed-logic environments where signal integrity across different voltage domains is critical for reliable operation.

Latches Replacement Considerations

Consult the official SN74HCT573 datasheet for confirmed pin-to-pin compatible substitutes from Texas Instruments or other authorized manufacturers. Verify that any alternative component maintains identical logic functionality, voltage ranges, and package dimensions to ensure seamless integration without redesigning the host circuit board.