Microchip Technology ATECC608B-MAHCZ-T

ATECC608B-MAHCZ-T combines hardware-based credential storage with accelerators for authentication, key agreement, hashing, and selected symmetric operations. Microchip's ordering table explicitly lists this H-grade, CZ single-wire, tape-and-reel option in an eight-pad 2 × 3 × 0.6 mm UDFN. The H grade covers -40 °C to +85 °C. Actual commands and key access depend on the locked configuration and provisioning state.

The LCDChip catalog and package registry identify 8-UFDFN Exposed Pad. Microchip's exact MA ordering entry identifies a thermally enhanced eight-pad 2 × 3 × 0.6 mm UDFN. The manufacturer recommends connecting its exposed backside paddle to ground. Use the current controlled land pattern and orientation drawing for PCB layout and assembly.

Layout checks

• Verify the top-view pin-1 index and pad numbering.
• Route SDA as the single-wire data signal.
• Review GPIO use, supply decoupling, and exposed-paddle grounding.

The registered package JPG is absent locally and currently returns HTTP 404 on the production site. The detail must remain unpublished until the correct image is restored and visually checked.

Microchip's eight-pad UDFN top-view diagram and interface table identify the CZ single-wire pin functions:

The exposed UDFN backside paddle is recommended to connect to GND. The configured function of pad 6 must be confirmed for the provisioned device.

Typical figures are not guaranteed limits. Check Microchip's complete electrical and timing tables, especially for supply, I/O loading, and single-wire operation.

ATECC608B-MAHDA-T uses the same family and eight-pad UDFN but its DA option is I2C; pad 6 functions as SCL rather than the SWI-mode GPIO. The V-grade MAVCZ-T has an extended temperature rating, but provisioning and ordering details still require verification. ATECC608A and ATECC508A migrations require manufacturer guidance and configuration review. No candidate is asserted as an automatic drop-in, and no unverified internal product link is inserted.

Microchip Technology's ATECC608B CryptoAuthentication Device Summary Data Sheet, DS40002239B, explicitly lists ATECC608B-MAHCZ-T and describes its package, single-wire interface, pin functions, features, and electrical limits. The public document is a summary; request controlled full documentation for final security qualification. Check Microchip's current product lifecycle guidance before a new design commitment.

Check the complete MAHCZ-T order code, package dimensions, traceability, intended credential provisioning, and configuration lock state. A secure element does not independently authenticate inventory without a trusted verification protocol and protected host credentials. Qualify the supplier and the complete system security chain.

Verify the latest manufacturer lifecycle status, full controlled data, SWI timing, supply and pullup design, GPIO configuration, credential provisioning, host-side key handling, and package land pattern. Do not assume an unprovisioned device performs a particular authentication workflow. Restore and visually verify the missing package image before formal publication.