SN74AHCT573N

Overview

The SN74AHCT573N is an octal transparent D-type latch manufactured by Texas Instruments. It features eight D-type latches with three-state outputs, designed for high-speed digital applications. The device operates within a supply voltage range of 4.5 V to 5.5 V and utilizes TTL-compatible inputs. It is housed in a standard 20-pin PDIP package suitable for through-hole mounting. The component ensures data integrity through latching capabilities controlled by a latch enable input.

Feature Summary

• Provides eight independent transparent D-type latches for parallel data storage
• Features three-state outputs allowing direct bus-driven connections without external drivers
• Incorporates TTL-compatible inputs for seamless integration with standard logic families
• Includes buffered output enables to manage high-impedance states effectively

Applications

• Parallel-to-serial conversion circuits
• Local buses within microprocessor systems
• Register files for temporary data storage
• I/O buffering for peripheral interfaces

Procurement Notes

Verify the specific ordering suffix to confirm the package type and temperature rating. Ensure the procurement channel provides original manufacturer documentation. Confirm RoHS compliance status matches project requirements. Check for lead time variations associated with the specific manufacturing facility. Validate that the component meets all relevant environmental standards before finalizing orders.

Selection Notes

Select this component when TTL compatibility is required alongside CMOS performance levels. Consider the SN74AHCT573N for designs needing robust noise immunity at 5V operation. Evaluate the PDIP package constraints against available PCB real estate. Compare propagation delays against system timing budgets to ensure signal integrity. Assess power consumption requirements relative to other logic families in the design.

Part Context

This part belongs to the SN74AHCT series, which combines the speed of Advanced CMOS technology with the compatibility of TTL inputs. The 573 designation specifically indicates an octal latch configuration. This family is widely used in industrial and consumer electronics where reliable data latching is critical. The N suffix denotes the plastic dual-in-line package variant.

Replacement Considerations

Direct replacements include the SN74ACT573N for broader voltage ranges or the SN74AHC573N for lower voltage support. Verify pinout compatibility before substituting. Ensure electrical characteristics such as drive strength and delay times meet application specifications.