ATSHA204-TH-CZ-T Authentication Chip Equivalent & Substitute Parts

Part Overview

The ATSHA204-TH-CZ-T is an authentication chip manufactured by Microchip Technology, part of the CryptoAuthentication™ series. This 8-TSSOP surface mount device is designed for networking and communications applications requiring secure authentication functionality.

The ATSHA204-TH-CZ-T has reached obsolete product status. Identifying equivalent and substitute parts is necessary to maintain design continuity, ensure supply chain availability, and support ongoing production requirements for systems utilizing this authentication chip.

Substiute Parts

ATSHA204-TH-CZ-T

Microchip TechnologyIn Stock: 3738ATSHA204-TH-CZ-T Datasheet

Current PartRFQ

ATSHA204A-XHCZ-T

Microchip TechnologyIn Stock: 783ATSHA204A-XHCZ-T Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the ATSHA204-TH-CZ-T is determined by the following critical parameters:

Electrical Compatibility: Both the main part and substitute must share the same base product number (ATSHA204) and series designation (CryptoAuthentication™), ensuring functional equivalence in authentication operations.

Mechanical Compatibility: The package type must remain 8-TSSOP with identical physical dimensions (0.173", 4.40mm Width) to ensure PCB footprint compatibility and surface mount assembly without design modification.

Regulatory Compliance: Both parts must maintain ROHS3 compliance and REACH unaffected status to satisfy environmental and regulatory requirements.

Application Alignment: Both parts must support networking and communications applications as specified.

The ATSHA204A-XHCZ-T meets all substitution criteria as an active product variant within the same authentication chip family, maintaining identical electrical function, package geometry, and regulatory compliance.

Parameter Comparison

Engineering Selection Recommendations

The ATSHA204A-XHCZ-T is the direct substitute for the obsolete ATSHA204-TH-CZ-T. Selection of this substitute part is based on the following engineering criteria:

Product Status: The ATSHA204A-XHCZ-T maintains active product status with Microchip Technology, ensuring continued availability and manufacturing support. The original ATSHA204-TH-CZ-T has reached obsolete status, making substitution necessary for new production and long-term supply chain stability.

Regulatory Compliance: Both parts maintain identical ROHS3 compliance and REACH unaffected status, satisfying environmental and regulatory requirements without additional qualification.

Functional Equivalence: Both parts share the same base product number and CryptoAuthentication™ series designation, confirming identical authentication chip functionality for networking and communications applications.

Package Compatibility: Identical 8-TSSOP package dimensions ensure direct PCB footprint compatibility without design modification or re-layout requirements.

Moisture Sensitivity Consideration: The substitute part (ATSHA204A-XHCZ-T) specifies MSL 3 (168 Hours) compared to MSL 1 (Unlimited) for the original part. This represents a standard moisture sensitivity classification for active production components and does not affect functional compatibility when handled according to industry standard moisture control procedures.

Frequently Asked Questions (FAQ)

Q: Can the ATSHA204A-XHCZ-T be used as a direct replacement for the ATSHA204-TH-CZ-T without PCB modification?

A: Yes. Both parts share identical 8-TSSOP package dimensions (0.173", 4.40mm Width) and surface mount specifications, enabling direct PCB footprint compatibility without design modification.

Q: What is the difference between Cut Tape (CT) and Tape & Reel (TR) packaging?

A: Cut Tape packaging supplies individual component strips suitable for manual assembly or small-volume production. Tape & Reel packaging supplies components on continuous reels optimized for automated pick-and-place assembly equipment. Both packaging formats contain identical components; the difference is in supply format and handling method.

Q: Does the higher Moisture Sensitivity Level (MSL 3) of the substitute part affect compatibility?

A: No. MSL 3 (168 Hours) is a standard moisture sensitivity classification for active production components. Both parts remain compatible when handled according to industry standard moisture control and storage procedures. MSL classification does not affect electrical or mechanical compatibility.

Q: Are both parts ROHS3 compliant?

A: Yes. Both the ATSHA204-TH-CZ-T and ATSHA204A-XHCZ-T maintain ROHS3 compliance and REACH unaffected status, satisfying environmental and regulatory requirements.

Q: Why is the original ATSHA204-TH-CZ-T listed as obsolete?

A: Product obsolescence occurs when manufacturers discontinue production of specific part variants. The ATSHA204A-XHCZ-T represents the active production variant within the same authentication chip family, providing equivalent functionality with continued manufacturing support.

Q: Can the ATSHA204A-XHCZ-T be used in existing designs currently using the ATSHA204-TH-CZ-T?

A: Yes. Identical electrical function, package geometry, and regulatory compliance enable direct substitution in existing designs without circuit modification or re-qualification.