ATECC108A-SSHCZ-B

Specialized ICS Overview

The ATECC108A-SSHCZ-B is a CryptoAuthentication™ security IC in an 8-lead SOIC package, utilizing Single-Wire Interface (SWI) communication. It provides hardware-based key storage and supports ECDSA signatures using NIST P256 curves. The device includes 10Kb EEPROM for up to 16 keys, a unique 72-bit serial number, and a FIPS-compliant RNG. Operating on a 2.0V to 5.5V supply, it features ultra-low sleep current (<150nA) and supports SHA-256 with HMAC.

Specialized ICS Feature Summary

• Hardware-accelerated ECDSA signature generation and verification for NIST P256, B283, and K283 curves
• 10Kb EEPROM memory supporting up to 16 keys, certificates, and configuration data
• Guaranteed unique 72-bit serial number with authentication capability
• Single-Wire Interface (SWI) with one available GPIO pin

Specialized ICS Applications

• Secure download and boot code validation
• IoT node protection and message integrity
• Anti-cloning for accessories and spare parts
• Firmware and media protection

Specialized ICS Procurement Notes

Verify the ordering suffix 'B' indicates bulk tube packaging and 'SSH' denotes the 8-lead SOIC package with Single-Wire Interface. Confirm that the specific revision matches project requirements as the device is part of the CryptoAuthentication family. Check for any applicable NDA restrictions regarding full datasheet access or advanced personalization procedures.

Specialized ICS Selection Notes

Select this model when a Single-Wire Interface is required to minimize GPIO usage on the host processor. Ensure the system voltage falls within the 2.0V to 5.5V range. Consider the 8-lead SOIC package dimensions if board space allows, noting the thermal characteristics specified for this package type compared to UDFN alternatives.

Specialized ICS Part Context

This component belongs to the Atmel/Microchip CryptoAuthentication™ family, designed for secure element applications. It serves as a hardware accelerator for cryptographic operations, offering higher performance and security than software-only implementations. The ATECC108A is compatible with previous ATSHA204 configurations but adds intrusion detection and extended memory capabilities.

Specialized ICS Replacement Considerations

ATECC108A-SSHDA-B: Identical functionality but uses I2C interface instead of SWI. ATECC108A-MAHCZ-T: Same function and interface but in UDFN-8 tape and reel packaging. ATECC108: Previous generation device; check configuration compatibility.