ATSHA204-TSU-T Equivalent & Substitute Parts

Part Overview

The ATSHA204-TSU-T is an authentication chip manufactured by Microchip Technology, designed for cryptographic authentication applications in networking and communications systems. This component is classified as obsolete, which necessitates identification of active equivalent parts to maintain design continuity and ensure long-term supply chain reliability. The part is housed in a SOT-23-3 surface mount package and complies with ROHS3 and REACH standards.

Substiute Parts

ATSHA204-TSU-T

Microchip TechnologyIn Stock: 2239ATSHA204-TSU-T Datasheet

Current PartRFQ

ATSHA204A-STUCZ-T

Microchip TechnologyIn Stock: 48721ATSHA204A-STUCZ-T Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the ATSHA204-TSU-T is determined by strict alignment of the following parameters:

Critical Substitution Criteria:

• Identical base product number (ATSHA204)
• Identical series designation (CryptoAuthentication™)
• Identical package type (SOT-23-3 / TO-236-3 / SC-59)
• Identical mounting type (Surface Mount)
• Identical application category (Networking and Communications)
• Equivalent or superior compliance status (ROHS3, REACH Unaffected)
• Equivalent or superior moisture sensitivity rating (MSL 1)

The ATSHA204A-STUCZ-T meets all substitution criteria as a direct equivalent. The primary distinction is product status: the original part is obsolete while the substitute is active, ensuring continued availability and manufacturer support.

Parameter Comparison

Engineering Selection Recommendations

The ATSHA204A-STUCZ-T is the direct equivalent substitute for the ATSHA204-TSU-T. Selection of this substitute is based on the following engineering factors:

Product Status Consideration: The original part is classified as obsolete, creating supply chain risk. The substitute maintains active product status with Microchip Technology, ensuring continued availability, technical support, and manufacturing consistency.

Compliance Alignment: Both parts maintain identical ROHS3 compliance and REACH unaffected status, satisfying regulatory requirements for the target application.

Functional Equivalence: Both parts share identical base product designation, series classification, package specification, and application category, confirming functional and mechanical interchangeability.

Supply Chain Continuity: The substitute part demonstrates significantly higher inventory availability (48,669 units versus 2,188 units), supporting production planning and long-term supply security.

Frequently Asked Questions (FAQ)

Q: Can the ATSHA204A-STUCZ-T be used as a direct replacement for the ATSHA204-TSU-T in existing designs?

A: Yes. Both parts share identical package specifications (SOT-23-3), mounting type (surface mount), and functional classification (authentication chip). No design modifications are required for PCB layout or assembly processes.

Q: Are there differences in compliance certifications between these parts?

A: No. Both parts maintain identical ROHS3 compliance status and REACH unaffected designation. Regulatory requirements are satisfied equally by either part.

Q: What is the primary reason for substitution?

A: The ATSHA204-TSU-T is classified as obsolete, while the ATSHA204A-STUCZ-T maintains active product status. This substitution ensures long-term supply availability and manufacturer support.

Q: Are the moisture sensitivity levels equivalent?

A: Yes. Both parts are rated MSL 1 (Unlimited), indicating identical handling and storage requirements with no moisture sensitivity constraints.

Q: Does the substitute part support the same applications?

A: Yes. Both parts are designated for networking and communications applications within the CryptoAuthentication™ series.

Q: Is there any difference in package or case designation?

A: No. Both parts use identical package specifications: TO-236-3, SC-59, and SOT-23-3 designations are equivalent across both parts.