Analog Devices Inc./Maxim Integrated DS28E30P+T

DS28E30P+T combines an ECDSA P-256 authentication engine, secure EEPROM, a true random number generator, a decrement-only counter, and a unique 64-bit ROM ID. Its asymmetric challenge-response method can help a host establish that a protected accessory contains a provisioned authentic device. The six-pin P option is a TSOC and T specifies tape-and-reel packaging.

The LCDChip registered catalog package is 6-SMD, J-Lead; the exact manufacturer's P ordering code specifies a six-pin TSOC. Check the controlled TSOC outline and land pattern; the + suffix denotes the lead-free/RoHS-compliant offering in the ordering table, while T denotes tape-and-reel delivery.

Layout checks

• Confirm pin 1 and TSOC top-view orientation.
• Place the specified external capacitors close to CEXT1 and CEXT2.
• Design the 1-Wire pull-up and strong-pull-up path for cryptographic operations.

The normalized registered 6-SMD JPG is absent locally and returns HTTP 404 on the production site. This draft must remain unpublished until the correct image is restored and visually verified.

The DS28E30 Rev. 3 manufacturer's six-pin TSOC top-view pin table assigns:

Do not omit either capacitor or infer the WLP pad layout applies to this TSOC option.

Typical values are not guaranteed limits. Check the manufacturer's full electrical tables, network loading, and strong-pull-up requirements for the exact operating conditions.

DS28E30P+ is listed in the same six-pin TSOC package without the T tape-and-reel suffix; verify procurement format and lot requirements. DS28E30X+T is a four-bump WLP and cannot be used on the TSOC footprint. Other 1-Wire identity devices or symmetric-key authenticators do not automatically replace this ECDSA P-256 device: trust chain, command set, capacitor pins, energy delivery, host code, and provisioning differ. No unverified internal product link is added.

Analog Devices publishes the DS28E30 1-Wire ECDSA Secure Authenticator data sheet, Rev. 3 (May 2023). Its exact ordering table lists DS28E30P+T as a six-pin TSOC tape-and-reel device. The pinout, secure-memory description, feature list, electrical table, and application circuit were used for this detail. Obtain controlled security and provisioning guidance for the complete application design.

Verify the full DS28E30P+T marking, lot traceability, TSOC geometry, provisioned certificate, and expected host trust anchor. A valid identifier alone is not equivalent to successful cryptographic authentication. Validate ECDSA signatures and the certificate chain through a secure host implementation; catalog identification does not prove the authenticity of physical inventory.

Review current controlled documents for command framing, 1-Wire overdrive timing, strong-pull-up energy, CEXT1/CEXT2 capacitor layout, certificate handling, key provisioning, and irreversible counter use. Authentication claims depend on a secure host verifier and trusted provisioning. Restore and visually verify the missing registered package JPG before formal publication.