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