CD74HCT573E

Latches Overview

The CD74HCT573E is an octal D-type transparent latch manufactured by Texas Instruments, belonging to the HCT logic series. It features eight independent D-type inputs and three-state true outputs. The device operates within a supply voltage range of 4.5 V to 5.5 V. Key electrical parameters include a propagation delay of 35 ns at 4.5 V, a static current of 8 uA, and output drive capabilities of 32 mA low-level and -6 mA high-level current. It is housed in a 20-PDIP package and supports an operating temperature range from -55°C to +125°C.

Latches Feature Summary

• Provides octal data storage with separate D-type inputs for each latch position.
• Features three-state outputs suitable for bus-oriented applications.
• Includes common latch enable (LE) and output enable (OE) control inputs.

Latches Applications

• Bus-oriented memory mapping
• Register files
• Temporary data storage

Latches Procurement Notes

Verify the manufacturer designation on the component marking, as the part number indicates Texas Instruments production despite the query specifying Harris Corporation. Confirm the RoHS compliance status and ensure the 20-PDIP through-hole package matches the target PCB footprint requirements before procurement.

Latches Selection Notes

Select this component when interfacing with Low-power Schottky TTL (LSTTL) systems due to its HCT compatibility. Ensure the design accommodates the specified 4.5 V to 5.5 V supply voltage range and requires the wide industrial temperature rating provided by the E suffix.

Latches Part Context

This component is part of the CD74HCT573 family of octal transparent latches. It serves as a standard logic IC for digital circuits requiring parallel data retention. The device is pin-compatible with Low-power Schottky TTL standards, facilitating integration into legacy or mixed-technology designs.

Latches Replacement Considerations

Publicly confirmed substitute part numbers include CD74HCT573M96G4 and CD74HCT573DBR. Verify package compatibility, as these substitutes utilize SOIC and SSOP surface-mount packages rather than the PDIP through-hole format of the CD74HCT573E.