SN74AS573ADWR Equivalent & Substitute Parts

Part Overview

The SN74AS573ADWR is a D-Type Transparent Latch logic IC manufactured by Texas Instruments, featuring an 8:8 circuit configuration with tri-state output capability in a 20-SOIC surface mount package. This component is classified as obsolete, making identification of suitable substitutes essential for ongoing design support and procurement continuity. The part operates within a 4.5V to 5.5V supply voltage range and is suitable for applications requiring transparent latch functionality with tri-state output control.

Substiute Parts

SN74AS573ADWR

Texas InstrumentsIn Stock: 949SN74AS573ADWR Datasheet

Current PartRFQ

SN74ALS373ADWR

Texas InstrumentsIn Stock: 2395SN74ALS373ADWR Datasheet

Parametric EquivalentRFQ

SN74AS573ADW

Texas InstrumentsIn Stock: 2283SN74AS573ADW Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the SN74AS573ADWR is determined by strict equivalence across the following critical parameters:

• Logic Type: D-Type Transparent Latch
• Circuit Configuration: 8:8
• Output Type: Tri-State
• Voltage - Supply: 4.5V ~ 5.5V
• Independent Circuits: 1
• Delay Time - Propagation: 6ns
• Current - Output High, Low: 2.6mA, 24mA
• Operating Temperature: 0°C ~ 70°C
• Package / Case: 20-SOIC (0.295", 7.50mm Width)
• Mounting Type: Surface Mount

Two substitute parts meet these criteria: the SN74ALS373ADWR (parametric equivalent) and the SN74AS573ADW (manufacturer-recommended equivalent). Both maintain identical electrical and mechanical specifications while differing in product status and packaging format.

Parameter Comparison

Engineering Selection Recommendations

The SN74AS573ADWR is obsolete; therefore, substitution is necessary for new designs and ongoing procurement. Both substitute parts are active products from Texas Instruments and maintain full electrical and mechanical compatibility.

The SN74AS573ADW is the manufacturer-recommended equivalent, maintaining the same 74AS series designation and product lineage. This part is available in tube packaging and represents the direct active replacement.

The SN74ALS373ADWR is a parametric equivalent from the 74ALS series, offering identical electrical performance and mechanical compatibility. This part is available in tape and reel packaging, suitable for high-volume automated assembly operations.

Both substitutes carry ROHS3 compliance and MSL Level 1 ratings, matching the original part's environmental and regulatory certifications. Selection between these options should be based on packaging requirements and procurement availability.

Frequently Asked Questions (FAQ)

Q: Can the SN74ALS373ADWR replace the SN74AS573ADWR in existing designs?

A: Yes. The SN74ALS373ADWR meets all electrical and mechanical parameters specified for the SN74AS573ADWR. Both parts feature identical logic type, circuit configuration, output type, supply voltage range, propagation delay, output current ratings, operating temperature range, and 20-SOIC package dimensions.

Q: What is the difference between the SN74AS573ADW and SN74ALS373ADWR?

A: The primary differences are series designation (74AS versus 74ALS) and packaging format (tube versus tape and reel). Electrically and mechanically, both parts are equivalent to the SN74AS573ADWR. The SN74AS573ADW maintains the original 74AS series lineage, while the SN74ALS373ADWR represents a parametric equivalent from an alternative series.

Q: Are there packaging compatibility considerations?

A: The SN74AS573ADW is supplied in tube packaging, while the SN74ALS373ADWR is supplied in tape and reel format. Both use the same 20-SOIC surface mount package with 0.295" width (7.50mm). Packaging selection depends on assembly process requirements and volume considerations.

Q: Do the substitute parts maintain the same compliance certifications?

A: Yes. Both substitute parts are ROHS3 compliant and carry MSL Level 1 ratings, matching the original SN74AS573ADWR certifications. Both are REACH unaffected and classified under ECCN EAR99.

Q: Why is the original SN74AS573ADWR obsolete?

A: The SN74AS573ADWR is classified as obsolete by Texas Instruments. Active alternatives are available with identical specifications, making substitution straightforward for design continuity and procurement planning.