Microchip Technology ATECC108A-SSHCZ-T

The ATECC108A provides secure storage for cryptographic secrets and implements authentication functions in dedicated hardware. A host exchanges commands through its single-wire interface while private material remains inside the device. Its configuration and one-time lock operations must be planned as part of the complete product security design.

Microchip's ordering table lists ATECC108A-SSHCZ-T in an 8-lead SOIC with tape-and-reel delivery. LCDChip registers the product as 8-SOIC (0.154", 3.90 mm width). Approve the footprint using the controlled SOIC drawing, tolerances and pin-one marking.

Layout checks

• Verify SOIC body and lead dimensions against the manufacturer drawing.
• Check pin-one orientation and the single-wire bus connection.
• Follow the supply-bypass and assembly guidance for the exact order code.

This generic JPG illustrates the package, not the device pinout.

The SOIC device provides power and ground, a single-wire serial-data connection, and device-specific auxiliary or no-connect positions. Use the manufacturer's ATECC108A single-wire pin diagram for exact pin numbers, signal directions, pull-up design and handling of unused pins. Do not transfer the pinout or timing of the I2C ordering variant.

See the manufacturer data sheet for electrical limits, timing, command details and security configuration.

Do not substitute a similar CryptoAuthentication order code based on package alone. The SSH single-wire option differs electrically and in host protocol from SDA I2C options; delivery form and provisioning can also differ. Validate interface wiring, firmware commands, key slots, personalization and lifecycle. No unverified internal alternative link is asserted.

Microchip Technology documents the ATECC108A in its CryptoAuthentication data-sheet summary. Its ordering table explicitly identifies ATECC108A-SSHCZ-T as an 8-lead SOIC, single-wire-interface, tape-and-reel option. The manufacturer's electrical and provisioning documents govern final design approval.

Check the complete SSHCZ-T order code, reel and lot labels, SOIC marking and traceability records. Functional acceptance should verify device response, serial number and expected provisioning state; external marking alone cannot prove stored credentials or lock configuration.

Use the current Microchip ATECC108A data sheet, ordering table, errata and package drawing to approve schematics, bus timing, firmware, provisioning and production tests. Security depends on the complete system protocol, credential handling and irreversible locking process; this product summary is not a substitute for a design review.