Professional IC Distribution & Technical Solutions

The ATSH204A-STUCZ-T is a cryptographic authentication device manufactured by Microchip Technology.

Specifications:

• Part Number: ATSHA204A-STUCZ-T
• Manufacturer: Microchip Technology
• Type: CryptoAuthentication™ Secure Hardware IC
• Interface: Single-Wire (SWI) / I²C (configurable)
• Operating Voltage: 2.0V to 5.5V
• Temperature Range: -40°C to +85°C
• Package: SOT-23-3
• Security Features:
• SHA-256 Hash Algorithm
• 4.5Kb EEPROM (512 bytes for configuration, keys, and data)
• Unique 72-bit serial number
• High-quality NIST-compliant random number generator
• Secure key storage with tamper protection
• Hardware-based cryptographic acceleration

Descriptions:

The ATSHA204A is a secure authentication IC designed for embedded systems requiring cryptographic verification. It provides hardware-based security for applications such as IoT, firmware protection, and secure boot. The device supports secure key storage, message authentication, and challenge-response protocols.

Features:

• Cryptographic Engine: Implements SHA-256 for secure hashing and HMAC operations.
• Secure Storage: Stores keys and data in a tamper-resistant EEPROM.
• Unique ID: Each device has a factory-programmed unique serial number.
• Low Power Consumption: Suitable for battery-powered applications.
• Configurable I/O: Supports Single-Wire (SWI) or I²C interface (selectable via configuration).
• High Durability: EEPROM supports up to 100,000 write cycles.
• Applications:
• Secure boot validation
• IoT device authentication
• Anti-counterfeiting
• Secure firmware updates

This device is commonly used in systems requiring strong hardware-based security without relying on software-based solutions vulnerable to attacks.