SN74ACT533PWR

Overview

The SN74ACT533PWR is an octal transparent D-type latch with inverting 3-state outputs manufactured by Texas Instruments. It operates within a supply voltage range of 4.5 V to 5.5 V and supports input voltages up to 5.5 V, ensuring TTL-voltage compatibility. The device features a maximum propagation delay (tpd) of 11 ns at 5 V. It utilizes a TSSOP-20 package and functions across an operating temperature range of -40°C to +85°C.

Feature Summary

• Octal transparent D-type latching architecture with inverted outputs
• Three-state output capability for direct bus line driving without interface components
• TTL-voltage compatible inputs accepting levels up to 5.5 V
• Buffered output-enable control isolating internal latch operations from external states

Applications

• Registering data on digital buses
• Driving high-capacitance loads directly
• Parallel-to-serial conversion interfaces
• Data storage in microprocessor systems

Procurement Notes

Verify the specific ordering suffix 'PWR' corresponds to the tape-and-reel packaging format and confirm the active production status via official Texas Instruments channels. Ensure the application environment remains strictly within the specified -40°C to +85°C temperature limits and that the supply voltage does not exceed the 5.5 V maximum rating to maintain device reliability.

Selection Notes

Select this component when an octal latch configuration with inverted logic is required for system design. The ACT series offers faster switching speeds compared to standard AC devices while maintaining CMOS power efficiency. Verify that the TSSOP-20 footprint aligns with existing PCB layout constraints and that the 3-state outputs meet the bus isolation requirements of the target circuit topology.

Part Context

This part belongs to the SNx4ACT533 family of octal transparent D-type latches. The 'SN74' designation indicates commercial grade availability, while the 'ACT' series specifies advanced CMOS technology optimized for speed and low power consumption. The 'PWR' suffix specifically identifies the surface-mount TSSOP package variant intended for automated assembly processes.

Replacement Considerations

Direct pin-compatible alternatives include the SN74ACT533DW and SN74ACT533N. Verify that any substitute maintains the same inverted output polarity and 3-state functionality. Confirm that the replacement part's thermal impedance and package dimensions match the original design specifications.