SN74HC573APWT

Overview

The SN74HC573APWT is an octal transparent D-type latch manufactured by Texas Instruments, belonging to the SN74HC series. It features eight D-type latches with three-state outputs in a 20-TSSOP package. The device operates within a supply voltage range of 2V to 6V and supports a wide operating temperature range from -40°C to +85°C. Propagation delay varies with voltage: 200 ns at 2V, 40 ns at 4.5V, and 34 ns at 6V. Static current is specified at 8 uA, with low-level output current of 32 mA and high-level output current of -7.8 mA.

Feature Summary

• Octal configuration providing eight independent D-type latches for parallel data storage
• Three-state outputs allowing direct connection to bus structures without external drivers
• Transparent latch operation where outputs follow inputs when the latch enable signal is active

Applications

• Parallel-to-serial data conversion circuits
• Bus-oriented memory mapping systems
• General-purpose register applications in digital logic designs

Procurement Notes

Verify the exact part number suffix against official manufacturer documentation to confirm package type and tape-and-reel specifications. Ensure compatibility with required operating temperatures and voltage levels before procurement. Cross-reference datasheet revisions to confirm pinout consistency and electrical characteristics match design requirements.

Selection Notes

Select this component for designs requiring multiple synchronized data storage elements with bus-compatible outputs. Consider the HC series speed and voltage characteristics relative to system timing constraints. Evaluate the TSSOP-20 package dimensions for PCB layout compatibility and thermal management needs within the specified operating temperature range.

Part Context

This component belongs to the SN74HC573A family of octal D-type latches. It shares functional similarities with other variants like SN74HC573ADBR and SN74HC573APWR, differing primarily in packaging and manufacturing revisions. The HC logic family provides CMOS performance with standard TTL compatibility.