Microchip Technology SHA104-MAVDA-T

The SHA104 family provides hardware-backed symmetric authentication for accessories, consumables, and ecosystem-control applications. The exact MAVDA-T ordering code denotes an eight-pad 2 mm × 3 mm × 0.6 mm thermally enhanced UDFN, extended-industrial temperature grade, I2C interface, and tape-and-reel supply. A protected symmetric key supports SHA-256 message authentication without exposing secret material through ordinary host communication.

LCDChip records 8-UFDFN Exposed Pad; Microchip describes the exact ordering code as an eight-pad thermally enhanced UDFN with a 2 mm × 3 mm × 0.6 mm body. The manufacturer's pin note recommends connecting the exposed backside paddle to ground. Use Microchip's controlled land pattern and thermal recommendations for PCB layout.

Layout checks

• Verify pad numbering using the manufacturer's top-view drawing.
• Connect VCC and GND correctly; route SDA and SCL for I2C signal integrity.
• Review exposed-paddle grounding and assembly requirements.

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Microchip's eight-pad UDFN top-view pin table for the I2C version identifies:

Microchip recommends the exposed backside paddle be connected to GND. Do not apply the SWI variant's pin-function assumptions to this DA I2C ordering option.

Typical and nominal values are not guaranteed limits. Confirm conditions in the current Microchip summary and full controlled documentation.

Other SHA104 suffixes may use single-wire communication, SOIC, or contact packages; they are not automatically pin- or software-compatible with the MAVDA-T I2C UDFN variant. A substitute must be checked for exact package and pad map, interface type, provisioning state, key management, command behavior, supply range, and temperature grade. No unverified internal replacement links are supplied.

Microchip Technology publishes the SHA104 CryptoAuthentication summary data sheet, revision B, which explicitly lists SHA104-MAVDA-T as an I2C eight-pad UDFN tape-and-reel variant. The manufacturer's controlled document should govern package dimensions, electrical limits, and security integration.

Verify the complete ordering code, lot traceability, package dimensions, and provisioning state during incoming inspection. Cryptographic authentication requires a properly protected host-side key and trusted provisioning process; the catalog description alone does not establish the authenticity of individual inventory.

Use Microchip's current controlled documentation for final PCB layout, electrical timing, security configuration, provisioning, and host protocol. Confirm that the device and host use matching I2C communication and key-management arrangements. Restore and verify the missing package image before requesting formal publication.