Microchip Technology SHA104-MAVCZ-T

SHA104-MAVCZ-T is an accessory-side secure authenticator for challenge-and-response, ecosystem-control, and limited-use applications. Microchip's exact ordering-code table identifies MA as an eight-pad 2 mm × 3 mm × 0.6 mm thermally enhanced UDFN, V as the -40 °C to +105 °C grade, CZ as the single-wire option, and T as tape-and-reel supply. It uses hardware-backed SHA-256 message authentication and protected symmetric-key storage.

The LCDChip catalog and package registry use 8-UFDFN Exposed Pad. Microchip's exact-model ordering example describes an eight-pad thermally enhanced UDFN with a 2 mm × 3 mm × 0.6 mm body. Its data sheet recommends connecting the exposed backside paddle to ground. Use the manufacturer's current land-pattern drawing for assembly.

Layout checks

• Use the manufacturer's top-view pad numbering.
• Route SI/O and ground for single-wire communication.
• Verify the exposed-paddle ground connection and controlled footprint.

The registered package JPG is missing locally and returns HTTP 404 on the production site. This draft cannot be published until the correct image is uploaded and visually verified.

Microchip's eight-pad UDFN top-view pin table identifies the CZ single-wire variant as follows:

The exposed backside paddle is recommended to be connected to GND. Microchip describes optional parasitic-power use for the SWI option; validate that mode separately before omitting a VCC connection.

Nominal and typical figures are not guaranteed limits. Confirm the exact electrical and timing conditions in Microchip's controlled data sheet, particularly if using parasitic power.

SHA104-MAVDA-T shares the general SHA104 family and UDFN size but uses I2C; its pad 5 is SDA and pad 6 is SCL, while this CZ variant uses SI/O at pad 5 and no clock at pad 6. It is not a firmware drop-in substitute. Other family ordering options also vary by package, provisioning, and supply format. Verify the exact interface, pin map, host command support, key provisioning, temperature range, and system authentication policy before considering any replacement. No unverified internal product link is asserted.

Microchip Technology's SHA104 CryptoAuthentication Summary Data Sheet, revision B, explicitly lists SHA104-MAVCZ-T as the eight-pad UDFN single-wire tape-and-reel variant. Use Microchip's latest controlled documentation for qualification, package drawings, and security configuration.

Check the full ordering code, lot traceability, UDFN dimensions, and intended provisioning state during incoming inspection. Authentication is only as strong as the protected host-side key, trusted personalization process, and validated application protocol. A catalog listing does not independently prove the authenticity of stock.

Use current Microchip controlled material for SWI timing, pullup, VCC or optional parasitic-power design, exposed-paddle assembly, security provisioning, and host-key protection. Evaluate the complete system under its operating and threat conditions. Restore and verify the missing package image before formal publication.