ATECC108A-SSHCZ-T

Specialized ICS Overview

The ATECC108A-SSHCZ-T is a CryptoAuthentication device by Microchip Technology, housed in an 8-lead SOIC package with Tape & Reel packaging. It provides hardware-based key storage and performs high-speed public key algorithms including ECDSA (P256, B283, K283), SHA-256, and HMAC. The device features 10Kb EEPROM for up to 16 keys, a unique 72-bit serial number, and an internal FIPS RNG. It supports Single-Wire Interface (SWI) and operates on a 2.0V to 5.5V supply with less than 150nA sleep current.

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 and internal high-quality FIPS Random Number Generator
• Single-Wire Interface (SWI) communication with optional GPIO functionality

Specialized ICS Applications

• Network/IoT Node Protection
• Anti-Counterfeiting
• Secure Download and Boot
• Message Security

Specialized ICS Procurement Notes

Verify the ordering suffix 'C' indicates Single-Wire Interface compatibility as specified in the datasheet. Confirm the 'T' suffix corresponds to Tape & Reel packaging containing 4,000 units per reel. Ensure the design accommodates the 8-lead SOIC physical dimensions and thermal characteristics.

Specialized ICS Selection Notes

Select this part when a Single-Wire Interface is required to minimize GPIO usage on the host processor. The device is suitable for applications needing hardware-accelerated ECC operations without exposing private keys. Verify that the system voltage range of 2.0V to 5.5V aligns with the target application requirements.

Specialized ICS Part Context

This component belongs to the Atmel CryptoAuthentication family, designed for secure key storage and authentication. It is fully compatible with the ATECC108 and offers enhanced features such as intrusion detection and X.509 certificate verification compared to earlier generations.

Specialized ICS Replacement Considerations

ATECC108A-SSHDA-B: Identical package but uses I2C interface instead of Single-Wire.

Specialized ICS FAQ

What is the maximum clock frequency for the Single-Wire Interface?

The datasheet specifies bit times compatible with a standard UART running at 230.4Kbaud.

How many keys can be stored in the device?

The device supports storage for up to 16 keys within its 10Kb EEPROM array.

Does the device support intrusion detection?

Yes, the ATECC108A includes intrusion latch capabilities for external tamper switches or power-on chip enablement.