CD74AC573M Equivalent & Substitute Parts

Part Overview

The CD74AC573M is a D-Type Transparent Latch logic IC manufactured by Texas Instruments, featuring 1 channel with 8:8 circuit configuration and tri-state output capability. This component is classified as Last Time Buy, indicating limited availability from the original manufacturer. Identifying equivalent and substitute parts is necessary to ensure design continuity, maintain supply chain reliability, and support long-term production requirements.

Substiute Parts

CD74AC573M

Texas InstrumentsIn Stock: 1643CD74AC573M Datasheet

Current PartRFQ

CD74AC573M96

Texas InstrumentsIn Stock: 9662CD74AC573M96 Datasheet

MFR RecommendedRFQ

CD74AC373M

Harris CorporationIn Stock: 1937CD74AC373M Datasheet

Parametric EquivalentRFQ

MC74AC573DWR2G

onsemiIn Stock: 1952MC74AC573DWR2G Datasheet

DirectRFQ

MC74AC573DWG

onsemiIn Stock: 3269MC74AC573DWG Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the CD74AC573M are classified based on the following critical parameters that determine functional and mechanical compatibility:

Primary Substitution Criteria:

• Logic Type: D-Type Transparent Latch
• Circuit Configuration: 8:8
• Output Type: Tri-State
• Package/Case: 20-SOIC form factor
• Mounting Type: Surface Mount

Secondary Compatibility Factors:

• Voltage Supply Range (must encompass or match operating requirements)
• Output Current Ratings (24mA minimum for both High and Low states)
• Operating Temperature Range (must support application environment)
• RoHS and regulatory compliance status

Substitutes are grouped into three categories: MFR Recommended (same base product with packaging variation), Parametric Equivalent (functionally identical with minor specification differences), and Direct Manufacturer Alternative (different manufacturer, same functional class).

Parameter Comparison

Engineering Selection Recommendations

Recommended Primary Substitute: CD74AC573M96

CD74AC573M96 is the preferred substitute, manufactured by Texas Instruments with identical electrical specifications to the original CD74AC573M. This part maintains the same voltage supply range (1.5V ~ 5.5V), propagation delay (3ns), and operating temperature range (-55°C ~ 125°C). The only difference is packaging format (Tape & Reel versus Tube), which does not affect functional performance. Active product status ensures continued availability and supply chain stability. ROHS3 compliance matches the original specification.

Secondary Substitute: MC74AC573DWG

MC74AC573DWG, manufactured by onsemi, provides functional equivalence with the same 8:8 D-Type Transparent Latch configuration and tri-state output. This part is available in Tube packaging matching the original format. Active product status supports long-term procurement. ROHS3 compliance is maintained. Note that voltage supply range (2V ~ 6V) is narrower than the original, and propagation delay (10ns) is longer. These specifications remain within acceptable tolerance for most applications but require design verification for timing-critical or extended low-voltage applications.

Alternative Substitute: MC74AC573DWR2G

MC74AC573DWR2G offers the same functional characteristics as MC74AC573DWG but in Tape & Reel packaging. Selection between these onsemi variants depends on procurement and assembly requirements.

Not Recommended: CD74AC373M

CD74AC373M is classified as Obsolete and RoHS non-compliant. While electrical parameters match the original, obsolete status creates supply chain risk and regulatory compliance concerns for new designs or long-term production.

Frequently Asked Questions (FAQ)

Q: Can CD74AC573M96 be used as a direct replacement for CD74AC573M?

A: Yes. CD74AC573M96 is electrically and functionally identical to CD74AC573M. The difference is packaging format (Tape & Reel versus Tube). Both are manufactured by Texas Instruments with identical specifications. Selection depends on assembly process requirements.

Q: What are the key differences between Texas Instruments and onsemi substitutes?

A: Texas Instruments CD74AC573M96 maintains identical electrical specifications (1.5V ~ 5.5V supply, 3ns delay, -55°C ~ 125°C operating range). onsemi MC74AC573DWR2G and MC74AC573DWG have narrower voltage range (2V ~ 6V) and longer propagation delay (10ns), with reduced operating temperature range (-40°C ~ 85°C). Both are ROHS3 compliant and Active status. Selection depends on application timing requirements and operating environment.

Q: Is the CD74AC373M a suitable substitute?

A: CD74AC373M shares identical electrical specifications but is classified as Obsolete with RoHS non-compliance. Use is not recommended for new designs or ongoing production due to supply chain uncertainty and regulatory concerns.

Q: Does packaging format affect electrical performance?

A: No. Tube and Tape & Reel packaging formats contain identical die and electrical characteristics. Selection is based on assembly process compatibility and procurement logistics, not functional performance.

Q: What is the significance of "Last Time Buy" status for CD74AC573M?

A: Last Time Buy indicates the manufacturer will discontinue production. Existing inventory is available but future procurement is not guaranteed. Transition to an Active status substitute (CD74AC573M96, MC74AC573DWG, or MC74AC573DWR2G) is recommended for designs requiring long-term component availability.

Q: Are all substitutes pin-compatible?

A: Yes. All listed substitutes maintain the 20-SOIC package format with identical pin configuration, enabling direct PCB-level replacement without layout modification.