SN74HCT573DW

Latches Overview

The SN74HCT573DW is an octal transparent D-type latch manufactured by Texas Instruments, belonging to the 74HCT logic series. It features eight D-type latches with non-inverting outputs in a 20-pin SOIC package. The device operates within a supply voltage range of 4.5 V to 5.5 V and supports a propagation delay of 52 ns at 4.5 V and 47 ns at 5.5 V. Static current consumption is specified at 8 uA, with low-level output current capability of 32 mA and high-level output current of -6 mA. The component functions across a temperature range from -40°C to +85°C.

Latches Feature Summary

• Provides eight independent transparent D-type latches for parallel data storage
• Ensures TTL-compatible input levels through HCT logic family design
• Maintains stable data retention when the latch enable signal is deactivated

Latches Applications

• Parallel data buffering in digital systems
• Interface bridging between microprocessors and peripheral devices
• Register stages in sequential logic circuits

Latches Procurement Notes

Verify the specific suffix 'DW' corresponds to the SOIC-20 package variant during sourcing. Confirm RoHS compliance status as indicated in official documentation. Ensure the procurement channel provides valid traceability for this discontinued or legacy part number. Cross-reference the manufacturer's latest datasheet revision to confirm pinout and electrical characteristics match the intended application requirements before finalizing orders.

Latches Selection Notes

Select this component when TTL-compatible inputs are required alongside CMOS performance levels. The HCT series offers superior noise immunity compared to standard HC logic while maintaining compatibility with older TTL-driven systems. Consider the SOIC-20 package dimensions for PCB layout constraints. Evaluate the 5.5 V maximum supply voltage against system power rails to ensure safe operating conditions under all load scenarios.

Latches Part Context

This part belongs to the widely adopted 74-series logic family, specifically the High-CMOS (HCT) subset designed for backward compatibility with Transistor-Transistor Logic (TTL). The SN74HCT573 serves as a fundamental building block for memory and control applications in industrial and consumer electronics. Its octal configuration allows efficient handling of byte-wide data paths without requiring multiple discrete components.

Latches Replacement Considerations

SN74HCT573DBR: SSOP-20 package variant with identical electrical specifications. SN74HCT573PW: TSSOP-20 package alternative offering similar functionality. CD74HCT573DBR: Equivalent device from the same manufacturer family.