Analog Devices Inc./Maxim Integrated DS28E16G+U

DS28E16 provides a hardware root for authenticating accessories and protecting associated user data. Its SHA-3 engine, securely stored secret, 256-bit EEPROM, authenticated-read decrement counter and unalterable 64-bit ROM ID support application-defined challenge/response workflows. The device uses a parasitically powered 1-Wire interface at overdrive speed.

LCDChip registers 2-WDFN, while ADI lists DS28E16G+U as a two-contact single-row flat no-lead (SFN) device. The manufacturer's DS28E16G+ package drawing shows a 3.5 mm × 6.5 mm SFN. ADI explicitly limits this SFN package to electro-mechanical contact use, not soldering. The catalog name is therefore not an approved footprint alias.

Layout checks

• Use ADI's controlled SFN drawing for contact geometry and orientation.
• Confirm electro-mechanical contact design instead of assuming solder attachment.
• Verify IO pullup, ground return and enclosure alignment.

The registered JPG is absent locally and HTTP 404 on the production site. Resolve the package discrepancy and image before publication.

ADI Rev. 2 data sheet assigns the SFN contacts as follows:

These are SFN contact numbers, not a validated 2-WDFN solder-land assignment. Use the bottom-view SFN drawing for orientation.

Do not treat typical values as guaranteed limits. Review the full electrical and timing tables for the chosen 1-Wire host design.

Other DS28E16 package codes and SHA-based authenticators are not automatically interchangeable. Compare cryptographic protocol, secret provisioning, EEPROM and counter behavior, 1-Wire timing, voltage, temperature, compliance and physical contact geometry. A TDFN or WLP variant has different pinout and assembly requirements. No internal substitute link is provided without exact catalog confirmation.

Analog Devices lists the exact DS28E16G+U code as a single-row flatpack, no-lead member of the DS28E16 family. Its Rev. 2 data sheet identifies the SFN package, contact functions and security architecture. Obtain current manufacturer package and compliance documentation for release.

Verify exact DS28E16G+U identification, manufacturer traceability and the secret-provisioning workflow. Use application-specific challenge/response tests and protect keys in the host system. Review current manufacturer declarations and handling requirements.

This selection summary does not replace controlled ADI documentation. The catalog's 2-WDFN label conflicts with the manufacturer's SFN designation and non-soldering restriction, and the registered image is unavailable. Hold layout and release pending package reconciliation.