SN74HC573AN

Overview

The SN74HC573AN is an octal transparent D-type latch manufactured by Texas Instruments, belonging to the HC logic series. It features eight D-type latches with three-state outputs in a 20-pin PDIP package. The device operates within a supply voltage range of 2 V to 6 V and supports a maximum low-level output current of 32 mA. Propagation delay varies from 200 ns at 2 V to 34 ns at 6 V. It functions across an industrial temperature range of -40°C to +85°C with a static current of 8 µA.

Feature Summary

• Provides tri-state control for eight independent D-type latches
• Transparent latch operation allows direct data passage when enabled
• Supports high-current driving capabilities for bus applications

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 to confirm the package type, as variations exist within the SN74HC573 family. Ensure compatibility with existing PCB footprints for the 20-pin DIP configuration. Confirm RoHS compliance status if required by assembly standards. Cross-reference the manufacturer datasheet for precise pinout definitions before integration.

Selection Notes

Select this component for designs requiring through-hole mounting and robust drive strength. The HC series offers speed comparable to LS logic with lower power consumption. Consider the 2V to 6V operating range for flexibility in varying supply voltages. Evaluate the 32 mA sink capability against load requirements for reliable signal integrity.

Part Context

This part belongs to the SN74HC573A family of octal latches. It serves as a standard solution for managing parallel data lines in microprocessor interfaces. The device complements other HC series logic gates for complete system design. It is widely used in embedded systems requiring stable data retention.

Replacement Considerations

SN74HC573APWR (TSSOP-20), SN74HC573ADBR (SSOP-20), SN74HC573ADWRG4 (SOIC-20). Verify package dimensions and pin compatibility before substitution.