ARTICLE
ATSHA204A-MAHDA-T Hardware Crypto Authentication IC SHA-256 UDFN-8
This page is written as a technical article rather than a full product datasheet. Use the associated component page and current manufacturer documentation for final component verification.
ATSHA204A-MAHDA-T is a compact hardware crypto authentication integrated circuit built with SHA-256 cryptographic algorithm, housed in 2x3mm UDFN-8 surface mount package. This crypto element delivers symmetric challenge-response authentication to protect embedded systems against counterfeiting and unauthorized firmware modification.
It integrates hardware protected key storage supporting up to 16 keys with 256-bit key length, equipped with 4.5Kbit EEPROM for secure saving of keys and user data, plus 512 bits OTP memory for permanent fixed information. Every chip comes with a guaranteed unique 72-bit serial number, paired with internal high-quality random number generator for cryptographic nonce generation.
The device supports I2C and single-wire interface, with wide supply voltage from 2.0V to 5.5V. Sleep current is less than 150nA, making it suitable for battery-powered low-power IoT devices. It offloads cryptographic operations from main microcontroller, reducing MCU computing burden and system security development difficulty without requiring advanced cryptography knowledge.
Typical use cases include accessory authentication, consumable anti-cloning, secure boot verification, encrypted session key exchange and firmware anti-piracy. Operating temperature covers -40℃ to +85℃, shipped in tape and reel for high-volume SMT assembly. It serves as a cost-effective security solution for compact embedded hardware designs.
It integrates hardware protected key storage supporting up to 16 keys with 256-bit key length, equipped with 4.5Kbit EEPROM for secure saving of keys and user data, plus 512 bits OTP memory for permanent fixed information. Every chip comes with a guaranteed unique 72-bit serial number, paired with internal high-quality random number generator for cryptographic nonce generation.
The device supports I2C and single-wire interface, with wide supply voltage from 2.0V to 5.5V. Sleep current is less than 150nA, making it suitable for battery-powered low-power IoT devices. It offloads cryptographic operations from main microcontroller, reducing MCU computing burden and system security development difficulty without requiring advanced cryptography knowledge.
Typical use cases include accessory authentication, consumable anti-cloning, secure boot verification, encrypted session key exchange and firmware anti-piracy. Operating temperature covers -40℃ to +85℃, shipped in tape and reel for high-volume SMT assembly. It serves as a cost-effective security solution for compact embedded hardware designs.
