ATSHA204A
ATSHA204A Microchip CryptoAuthentication Data Sheet
Features
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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)
4.5 kb 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
– 1 MHz I2C Interface
2.0V to 5.5V Supply Voltage Range
1.8V to 5.5V Communications Voltage Range
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