SN74ACT573PWRE4

Overview

The SN74ACT573PWRE4 is an octal D-type transparent latch with 3-state outputs manufactured by Texas Instruments. It operates within a supply voltage range of 4.5V to 5.5V and features inputs compatible with TTL voltage levels. The device provides high drive capability, supporting output currents of ±24mA at 5V, with peak capabilities up to ±75mA for short pulses. Maximum propagation delay is specified as 9.5ns at 5V. It is housed in a 20-pin TSSOP package.

Feature Summary

• Features three-state outputs designed for driving highly capacitive or low-impedance loads.
• Transparent latch architecture allows data to pass directly when latch-enable is active.
• TTL-voltage compatible inputs simplify interface requirements.
• High continuous output current capability supports direct bus driving.

Applications

• Parallel data storage
• Digital bus buffer implementation
• Buffer registers
• Working registers

Procurement Notes

Verify the specific ordering suffix 'E4' corresponds to lead-free and RoHS compliant material specifications as defined in the manufacturer's documentation. Confirm that the PW package designation matches the required TSSOP form factor for the target PCB layout. Ensure the operating temperature range aligns with system environmental constraints before finalizing procurement.

Selection Notes

Select this component for designs requiring parallel data retention with high-speed performance. The ACT series offers faster switching speeds compared to standard HC logic while maintaining CMOS power efficiency. Consider the 3-state output feature if multiple devices share a common bus line to prevent signal contention during inactive periods.

Part Context

This part belongs to the SNx4ACT573 family of octal latches. Variants include military grade (SN54ACT573) and automotive qualified (SN74ACT573-Q1) versions. Other package options exist, such as SSOP, SOIC, and VQFN, allowing flexibility in board space constraints while maintaining identical logical functionality across the product line.

Replacement Considerations

SN74ACT573PWR