ATSHA204-TH-DA-T

Specialized ICS Overview

The ATSHA204-TH-DA-T is a CryptoAuthentication™ security IC designed for hardware-level device authentication. It integrates a SHA-256 cryptographic engine with Message Authentication Code (MAC) and Hash-Based Message Authentication Code (HMAC) capabilities, supporting up to 16 keys of 256-bit length. The device features a guaranteed unique 72-bit serial number, an internal high-quality Random Number Generator (RNG), and 4.5 Kb of EEPROM for secure data storage alongside 512 bits of One-Time Programmable (OTP) memory. It operates on a supply voltage range of 2.0V to 5.5V with communication voltages from 1.8V to 5.5V, utilizing either a 1MHz I²C interface or a High-Speed Single-Wire Interface.

Specialized ICS Feature Summary

• Integrated SHA-256 hash algorithm with MAC and HMAC options for robust authentication protocols.
• Supports up to 16 secret keys with 256-bit length and includes a high-quality internal Random Number Generator (RNG).
• Provides 4.5 Kb EEPROM for key/data storage and 512-bit OTP zone for fixed information.
• Features multiple I/O options including a 1MHz I²C interface and a High-Speed Single-Wire Interface.

Specialized ICS Applications

• Anti-counterfeiting validation for consumables, daughter cards, and spare parts.
• Secure boot validation and firmware protection against unauthorized modifications.
• Session key exchange for encrypted communications and downloads.
• Network and computer access control systems.

Specialized ICS Procurement Notes

Verify the specific ordering suffix 'TH-DA-T' against the manufacturer's current documentation to confirm package type and tape/reel specifications. Confirm that the component meets all required environmental and electrical standards for the intended application before procurement.

Specialized ICS Selection Notes

Select this component when hardware-based authentication is required for IoT devices or embedded systems. Ensure the host microcontroller supports either the I²C protocol at 1MHz or the Single-Wire Interface. Verify that the 2.0V to 5.5V supply voltage range aligns with the system power architecture.

Specialized ICS Part Context

This part belongs to the Atmel Microchip CryptoAuthentication™ family, specifically the ATSHA204 series. It serves as a dedicated crypto-authentication coprocessor designed to offload security tasks from the main processor, ensuring that secret keys never leave the secure boundary of the chip.

Specialized ICS Replacement Considerations

The datasheet indicates the ATSHA204 is not recommended for new designs and has been replaced by the ATSHA204A. Verify if the ATSHA204A offers necessary backward compatibility or if design modifications are required for integration.