The DS2431G+T&R from Maxim Integrated is a high-security, 1Kb 1-Wire EEPROM device designed for applications where secure data storage and data integrity are paramount. This compact component integrates memory and a dedicated SHA-1 (Secure Hash Algorithm) engine, making it an ideal solution for authentication and data protection in a variety of systems.

Key Features

• Secure Memory: The DS2431G+T&R features 1024 bits of 5V EEPROM memory, which includes an extra 192 bits for control functions. This memory is partitioned into four pages of 256 bits, with each page further subdivided into four blocks of 64 bits.
• SHA-1 Engine: The integrated SHA-1 engine facilitates the creation of a 160-bit message authentication code (MAC) from the on-chip secret and data stored in the EEPROM, ensuring data integrity and authenticity.
• 1-Wire Interface: This device operates over a single data line, plus ground, for simple and low-cost connectivity, which is compatible with the 1-Wire protocol.
• Challenge-and-Response Authentication: By using the SHA-1 engine for challenge-and-response authentication, it provides a high level of security against unauthorized access and data tampering.
• Write Protection: The DS2431G+T&R allows individual memory pages to be permanently write-protected or put in EPROM-emulation mode, where bits can only be changed from a 1 to a 0 state.
• High Reliability: The EEPROM is rated for over 1 million write cycles, and data retention is guaranteed for a minimum of 10 years, ensuring long-term reliability of the stored data.

Applications

The DS2431G+T&R is suitable for a wide range of applications, including but not limited to:

• Accessory/Peripheral Authentication
• Medical and Industrial Sensor Calibration Data Storage
• Aftermarket Management of Consumables
• Secure Data Storage in Networking Hardware

Overall, the DS2431G+T&R from Maxim Integrated provides a robust and secure storage solution that can be easily integrated into various security-conscious applications, ensuring both the protection and integrity of critical data.