The ATSHA204A device includes an Electrically Erasable Programmable Read-Only Memory (EEPROM) array that can be used for key storage, miscellaneous read/write data, read-only, secret data, consumption logging, and security configuration. Access to the various sections of memory can be restricted in a variety of ways, and the configuration can then be locked to prevent changes. Features ● Crypto Element with Protected Hardware-based Key Storage ● Secure Symmetric Authentication Device Host and Client Operations ● Superior SHA-256 Hash Algorithm with Message Authentication Code (MAC) and Hash-Based Message Authentication Code (HMAC) Options ● Best-in-class, 256-bit Key Length; Storage for Up to 16 Keys ● Guaranteed Unique 72-bit Serial Number ● Internal, High-quality Random Number Generator (RNG) ● 4.5Kb EEPROM for Keys and Data ● 512 bit OTP (One Time Programmable) Bits for Fixed Information ● Multiple I/O Options ̶ UART-compatible High-Speed, Single-Wire Interface ̶ 1MHz I2C Interface ● 2.0V to 5.5V Supply Voltage Range ● 1.8V to 5.5V Communications Voltage Range ● <150nA Sleep Current ● Secure Download and Boot ̶ Ecosystem Control ̶ Message Security ̶ Anti-Cloning ● 8-lead SOIC, 8-lead TSSOP(2), 3-lead SOT23, 8-pad UDFN, 8-pad XDFN, and 3-lead CONTACT Packages Applications ● Secure Download and Boot ● Ecosystem Control ● Anti-cloning ● Message Security
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