SN74ACT573PW

Overview

The SN74ACT573PW is an octal D-type transparent latch with three-state outputs manufactured by Texas Instruments. It operates within a supply voltage range of 4.5V to 5.5V and accepts input voltages up to 5.5V. The device features TTL-voltage compatible inputs and a maximum propagation delay of 9.5ns at 5V. Designed for driving highly capacitive or low-impedance loads, it utilizes a TSSOP-20 package.

Feature Summary

• Features three-state outputs designed specifically for driving high-capacitance or low-impedance loads
• Inputs are compatible with TTL voltage levels and accept voltages up to the maximum supply rating
• Transparent latch operation allows data output to follow input when latch enable is active

Applications

• Parallel data storage
• Digital bus buffer implementation
• Buffer registers and working registers

Procurement Notes

Verify the specific ordering suffix against the manufacturer's current Package Option Addendum. Confirm that the component status matches project requirements, as the PW package variant may be listed as obsolete in some documentation while the PWR variant remains active. Ensure the lead finish and moisture sensitivity level align with assembly capabilities.

Selection Notes

Select this component for designs requiring eight-bit latching with bus isolation capabilities. Verify that the operating temperature range of -40°C to +85°C meets environmental specifications. Ensure the power supply provides stable voltage between 4.5V and 5.5V to maintain signal integrity and timing parameters.

Part Context

This part belongs to the SNx4ACT573 family of octal D-type transparent latches. The family includes variants such as SN74ACT573DBR (SSOP), SN74ACT573DWR (SOIC), and SN74ACT573PWR (TSSOP). These devices share identical logical functionality but differ in physical packaging and thermal characteristics.

Replacement Considerations

SN74ACT573PWR is an active production alternative in the same TSSOP-20 package. Other package options like SN74ACT573DBR and SN74ACT573DWR offer functional equivalence but require different footprint layouts.