SN74ALS573CDB Equivalent & Substitute Parts

Part Overview

The SN74ALS573CDB is a D-Type Transparent Latch logic integrated circuit manufactured by Texas Instruments, featuring a single 8:8 channel configuration with tri-state, non-inverted output. This component is classified as Last Time Buy, indicating discontinued production with limited inventory availability. Identifying equivalent substitute parts is necessary to ensure design continuity, maintain supply chain reliability, and support long-term production requirements for applications utilizing this logic latch architecture.

Substiute Parts

SN74ALS573CDB

Texas InstrumentsIn Stock: 2051SN74ALS573CDB Datasheet

Current PartRFQ

SN74ALS573CDBR

Texas InstrumentsIn Stock: 1135SN74ALS573CDBR Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the SN74ALS573CDB is determined by strict equivalence across the following critical parameters:

Logic Architecture: Both the main part and substitute must implement D-Type Transparent Latch logic with identical 8:8 channel configuration and single independent circuit topology.

Electrical Specifications: Supply voltage range (4.5V ~ 5.5V), output current characteristics (2.6mA high, 24mA low), and operating temperature range (0°C ~ 70°C) must be identical.

Output Characteristics: Tri-state output configuration with non-inverted logic levels must be maintained.

Physical Package: 20-SSOP surface mount package with 0.209" (5.30mm) width specification is mandatory for mechanical compatibility.

Compliance Standards: RoHS3 compliance and MSL Level 1 rating must be preserved.

The SN74ALS573CDBR qualifies as a direct substitute based on these parameters. The primary distinction is packaging format (Tape & Reel versus bulk) and product status transition from Last Time Buy to Active production status.

Parameter Comparison

Engineering Selection Recommendations

For Immediate Procurement: The SN74ALS573CDBR is the primary substitute for the SN74ALS573CDB. This part maintains full electrical and functional equivalence while offering the advantage of Active product status, ensuring continued availability and manufacturing support from Texas Instruments.

Supply Chain Consideration: The SN74ALS573CDB is designated Last Time Buy, indicating limited remaining inventory (2000 Pcs noted). The SN74ALS573CDBR, with Active status and current inventory of 1026 Pcs, provides superior long-term supply assurance.

Packaging Format: The SN74ALS573CDBR is supplied in Tape & Reel format, which is standard for automated assembly operations. If bulk packaging is required, this must be addressed through supplier conversion services or alternative sourcing channels.

Compliance Verification: Both parts maintain ROHS3 compliance and MSL Level 1 rating, satisfying environmental and reliability requirements for industrial and commercial applications.

Frequently Asked Questions (FAQ)

Q: Can the SN74ALS573CDBR directly replace the SN74ALS573CDB in existing designs?

A: Yes. The SN74ALS573CDBR is electrically and functionally equivalent. Both parts implement identical D-Type Transparent Latch logic with 8:8 configuration, tri-state output, and matching electrical specifications. The 20-SSOP package dimensions are identical, enabling direct PCB footprint compatibility.

Q: What is the difference between SN74ALS573CDB and SN74ALS573CDBR?

A: The primary differences are packaging format and product lifecycle status. The SN74ALS573CDB is supplied in bulk packaging and is Last Time Buy. The SN74ALS573CDBR is supplied in Tape & Reel format and maintains Active production status. All electrical and functional parameters are identical.

Q: Is Tape & Reel packaging compatible with my assembly process?

A: Tape & Reel packaging is the industry standard for automated surface mount assembly. If your process requires bulk packaging, contact your supplier regarding conversion options or alternative sourcing.

Q: Are there any temperature or voltage derating considerations when substituting?

A: No. Both parts operate across the identical temperature range (0°C ~ 70°C) and voltage supply range (4.5V ~ 5.5V). Operating parameters remain unchanged.

Q: Does the SN74ALS573CDBR meet the same compliance standards?

A: Yes. The SN74ALS573CDBR maintains ROHS3 compliance, MSL Level 1 rating, and all environmental certifications equivalent to the SN74ALS573CDB.

Q: What is the propagation delay for the SN74ALS573CDBR?

A: The SN74ALS573CDBR specifies a propagation delay of 2ns. This parameter was not provided for the SN74ALS573CDB in the original documentation.