SN74ACT533DWR

Overview

The SN74ACT533DWR is an octal transparent D-type latch with 3-state outputs manufactured by Texas Instruments. It operates on a 4.5-V to 5.5-V supply voltage and features inputs that accept voltages up to 5.5 V, ensuring TTL-voltage compatibility. The device provides a maximum propagation delay of 11 ns at 5 V. Its 3-state inverting outputs are capable of directly driving bus lines without requiring interface or pullup components. The component utilizes a 20-pin SOIC (DW) package.

Feature Summary

• Octal transparent D-type latching functionality with inverted outputs
• Three-state output capability for direct bus line driving
• TTL-voltage compatible inputs accepting up to 5.5 V
• Buffered latch-enable and output-enable control signals

Applications

• Bus-oriented memory mapping
• Registering wide data words
• Driving high-capacitance or multiple loads on bus lines

Procurement Notes

Verify the specific ordering suffix 'DWR' corresponds to the tape-and-reel packaging format within the SOIC-20 footprint. Confirm the operating temperature range matches the -40°C to 85°C specification required for your application environment. Ensure the datasheet revision SCAS553C is referenced for accurate electrical parameters during design validation.

Selection Notes

Select this component when designing systems requiring octal data storage with inverted logic levels and bus isolation capabilities. It is suitable for applications needing TTL-compatible input thresholds while maintaining CMOS drive strength. Consider the 3-state feature if the design requires sharing data lines among multiple devices without external buffering hardware.

Part Context

This part belongs to the SN54/74ACT logic family, which combines the speed of bipolar circuits with the low power consumption of CMOS technology. The ACT series is designed for high-performance digital systems. The SN74 variant indicates commercial temperature rating, distinguishing it from the military-rated SN54 counterpart.

Replacement Considerations

SN74ACT533DW: Identical function in tube packaging instead of tape and reel.