SN74AHC573PW

Overview

The SN74AHC573PW is an octal transparent D-type latch manufactured by Texas Instruments. It operates within a supply voltage range of 2V to 5.5V and features three-state outputs. The device utilizes CMOS logic technology from the AHC series, housed in a TSSOP-20 package. Key electrical characteristics include a propagation delay of 14.5 ns and 8.8 ns, with a maximum static current of 4 uA. Output drive capabilities are specified at 32 mA for low-level output and -8 mA for high-level output. The component supports an operating temperature range from -40°C to +125°C.

Feature Summary

• Octal transparent D-type latch architecture providing eight independent data storage channels.
• Three-state outputs allowing direct connection to bus structures without external drivers.
• Wide supply voltage operation ranging from 2V to 5.5V for flexible system integration.
• High noise immunity and low power consumption inherent to advanced CMOS technology.

Applications

• Parallel-to-serial data conversion circuits
• Register files in microprocessor systems
• Bus-oriented memory mapping applications

Procurement Notes

Verify the specific suffix 'PW' corresponds to the TSSOP-20 package variant when sourcing. Confirm RoHS compliance status through official manufacturer documentation or authorized distributor datasheets prior to procurement. Ensure the ordering part number matches the required pin configuration and thermal specifications for the target PCB layout.

Selection Notes

Select this component for designs requiring wide voltage compatibility between 2V and 5.5V. The AHC series offers improved speed and lower power compared to standard HC logic. Consider the TSSOP-20 package for surface-mount assembly requirements. Verify that the 32mA low-level output current meets the load requirements of the connected circuitry.

Part Context

This device belongs to the SN74AHC573 family of octal latches. It serves as a digital storage element in logic circuits, capturing data on the enable signal transition. The AHC designation indicates Advanced High-Speed CMOS technology, balancing performance and power efficiency for general-purpose digital applications.

FAQ

What is the function of the Latch Enable (LE) input?

When LE is high, the Q outputs follow the D inputs. When LE is low, the outputs are latched at the logic levels established on the inputs.

Does this device support three-state outputs?

Yes, the SN74AHC573PW features three-state outputs, allowing it to be used directly on bus lines.