Analog Devices Inc./Maxim Integrated DS28E15G+U

DS28E15 supports bidirectional, symmetric-key-based authentication over a single-contact 1-Wire bus. Its 512-bit user EEPROM is organized as two 256-bit pages, with configurable protection. The unique 64-bit ROM ID is used in authentication and addresses devices on a multi-device bus.

LCDChip registers 2-WDFN for this item, whereas ADI calls DS28E15G+U a two-contact SFN (single-row flatpack, no leads). ADI's abridged data sheet says the SFN option is qualified for electro-mechanical contact applications only, not soldering. This is a material package and assembly-method discrepancy, not a confirmed alias.

Layout checks

• Confirm the intended SFN mechanical drawing and contact orientation.
• Do not assume a solderable WDFN land pattern is suitable for this exact code.
• Compare attachment method, IO/GND contact assignment and system pullup.

The registered JPG is not yet available locally or on the production site. Package nomenclature and assembly requirements require human review.

ADI's manufacturer abridged DS28E15 data sheet identifies two SFN contacts, viewed according to the official package drawing:

Contact numbering belongs to the SFN variant. Do not map it to a 2-WDFN footprint without a controlled drawing comparison.

The SFN option is not qualified for soldering according to the manufacturer abridged data sheet. Values listed as typical are not guaranteed limits.

Other DS28E15 package variants and other secure-authenticator families are not automatic substitutes. Compare exact ordering code, secret provisioning, authentication commands, memory-protection behavior, 1-Wire timing, electrical limits, temperature range, mechanical contact system and assembly method. The SFN versus 2-WDFN discrepancy must be resolved before specifying any footprint or replacement. No unverified LCDChip internal alternative is linked.

Analog Devices lists DS28E15G+U as a DS28E15 family ordering code in a single-row flatpack, no-lead format. ADI's Rev. 3 English abridged data sheet describes the security architecture; its manufacturer Japanese abridged data sheet includes the SFN contact table and electrical conditions. Some further product information is available only after an NDA.

Verify the exact DS28E15G+U marking, manufacturer traceability and intended provisioning method. Protect the secret-loading process and confirm authenticity with an application-specific challenge. Review controlled manufacturer compliance and handling documents for the shipment.

This summary does not replace controlled ADI documentation. The catalog's 2-WDFN name conflicts with the manufacturer SFN designation and soldering restriction, while the registered package image is unavailable. Obtain a verified package and attachment decision before PCB layout, procurement qualification or release.