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ATSHA204A-STUCZ-T

MCHPATSHA204A-STUCZ-T

Microchip Technology
Authentication Chip SOT-23-3
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Overview

The ATSHA204A-STUCZ-T is a high-security authentication device from Microchip's CryptoAuthentication family that integrates a 664-byte EEPROM. It uses the SHA-256 algorithm to provide secure boot, anti-cloning, and session key exchange capabilities for embedded systems. This specific variant features a Single-Wire Interface (SWI) in a compact 3-lead SOT-23 package, ideal for space-constrained designs.

Why Choose This Part

The device features extremely low power consumption with a sleep current of only 150 nA and operates across a 2V to 5.5V supply range. Its Single-Wire Interface allows security to be added to a system using only one GPIO, while the hardware-based SHA-256 engine ensures cryptographic operations are shielded from software-based side-channel attacks.

Applications

Secure Boot
Authenticating the firmware on a host microcontroller before execution to prevent unauthorized code execution.
Anti-Cloning
Validating the authenticity of peripheral devices or consumables to ensure they are genuine OEM products.
Ecosystem Control
Limiting accessory usage to authorized partners by requiring a successful cryptographic handshake.
Message Authentication
Providing message integrity for data sent between nodes in a distributed industrial or networking system.

Key Specifications

Type Authentication Chip
Applications Networking and Communications
Mounting Type Surface Mount
Package / Case TO-236-3, SC-59, SOT-23-3
Supplier Device Package SOT-23-3

Getting Started

To evaluate this chip, use the CryptoAuthentication Starter Kit (ATCK101) or the DT100104 development board. Software integration is simplified through Microchip's CryptoAuthLib library, which provides C-based drivers for hardware-independent implementation.

Also Consider

ATECC608B MCHPMicrochip Technology - Offers advanced ECC public key cryptography and secure hardware key storage for more complex IoT security requirements.
DS28E15 Maxim Integrated / Analog Devices - A 1-Wire SHA-256 authenticator that serves as a direct alternative for simple challenge-response authentication.
ATSHA204A-MAHDA-T MCHPMicrochip Technology - An I2C version in a UDFN package for designs requiring standard two-wire bus communication instead of a single-wire interface.

Categories

Security ICs > Secure Elements IoT & Smart Devices > IoT Security & Crypto