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ATSHA204A-MAHDA-S

MCHPATSHA204A-MAHDA-S

Microchip Technology
Authentication Chip 8-UDFN (2x3)
Active1,828 in stock
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Overview

The ATSHA204A-MAHDA-S is a high-security authentication device from Microchip's CryptoAuthentication family. It features 664 bytes of EEPROM for protected hardware-based key storage and utilizes the superior SHA-256 hash algorithm for symmetric authentication. This 8-UDFN component is designed to provide a low-cost solution for anti-cloning and secure boot applications in embedded systems.

Why Choose This Part

This device offers a very low sleep current of 150uA and operates across a wide supply voltage range of 2V to 5.5V. It integrates an internal high-quality RNG and oscillator, reducing the need for external components while providing robust hardware-level security that is far more resistant to physical tampering than software-only implementations.

Applications

Secure Boot and Download
Verifies the authenticity of firmware updates and bootloader images to prevent unauthorized code execution.
Ecosystem Control
Ensures only authorized peripherals or disposables can interface with a host system.
Anti-Cloning
Utilizes a unique 72-bit serial number and 256-bit keys to distinguish genuine hardware from counterfeit clones.
Message Security
Provides HMAC options for verifying the integrity and origin of data transmitted over I2C or Single-Wire interfaces.

Key Specifications

Type Authentication Chip
Applications Networking and Communications
Mounting Type Surface Mount
Package / Case 8-UFDFN Exposed Pad
Supplier Device Package 8-UDFN (2x3)

Getting Started

To begin development, use the Microchip CryptoAuth Trust Platform which supports the ATSHA204A via the I2C interface. Engineers can utilize the CryptoAuthLib C library to implement host-side and client-side authentication logic, typically paired with a Microchip MCU dev board for initial prototyping.

Also Consider

ATECC608B-MAHDA-S MCHPMicrochip Technology - Provides advanced elliptic curve cryptography (ECC) support for public-key based authentication if SHA-256 symmetric security is insufficient.
DS28E15Q+T Maxim Integrated / Analog Devices - Offers SHA-256 authentication with a simple 1-Wire interface for systems requiring minimal I/O pin usage.