I²C Low-Voltage SHA-3 Authenticator

Protect Your Development Investment with Crypto-Strong Authentication and Advanced Physical Security

Please check latest availability status for a specific part variant.


The DS28C16 secure authenticator combines FIPS202-compliant Secure Hash Algorithm (SHA-3) challenge and response authentication with secured EEPROM.

The device provides a core set of cryptographic tools derived from integrated blocks including a SHA-3 engine, 256 bits of secured user EEPROM, a decrement-only counter and a unique 64-bit ROM identification number (ROM ID). The unique ROM ID is used as a fundamental input parameter for cryptographic operations and serves as an electronic serial number within the application.

DS28C16: Block Diagram DS28C16: Block Diagram Enlarge+

Key Features

  • Robust Countermeasures Protect Against Security Attacks
    • All Stored Data Cryptographically Protected from Discovery
  • Efficient Secure Hash Algorithm Authenticates Peripherals
    • FIPS 202-Compliant SHA-3 Algorithm for Challenge/Response Authentication
    • FIPS 198-Compliant Keyed-Hash Message Authentication Code (HMAC)
  • Supplemental Features Enable Easy Integration into End Applications
    • 17-Bit One-Time Settable, Nonvolatile Decrement-Only Counter with Authenticated Read
    • Secure Storage for Secrets
    • 256 Bits of Secure EEPROM for User Data
    • Unique and Unalterable Factory Programmed 64-Bit Identification Number (ROM ID)
    • I²C Communications Up to 1MHz
    • Operating Range: 1.62V–3.63V, -40°C to +85°C
    • 8-Pin, 2mm x 2mm TDFN-EP Package


  • Accessory and Peripheral Secure Authentication
  • Battery Authentication and Charge Cycle Tracking
  • Medical Tools/Accessories Authentication and Calibration

See parametric specs for Secure Authenticators (33)

Part NumberCrypto EngineApplicationsMemory TypeMemory SizeBus TypeVSUPPLY
Deep CoverOper. Temp.
(See Notes)
DS28C16 NEW!Symmetric
Access Control
Asset Tracking
Battery ID and Authentication
IP Protection
Identification Systems
Medical Consumable ID
Medical Sensor Authentication and Calibration
PCB ID and Authentication
Print Cartridge Authentication
Printer Cartridge Configuration and Monitoring
Rack Card Security
Secure Access Control
Secure Authentication of Accessories and Peripherals
EEPROM256 bitsI2C1.71V to 3.63VYes-40 to +85
$0.65 @1k

Pricing Notes:
This pricing is BUDGETARY, for comparing similar parts. Prices are in U.S. dollars and subject to change. Quantity pricing may vary substantially and international prices may differ due to local duties, taxes, fees, and exchange rates. For volume-specific and version-specific prices and delivery, please see the price and availability page or contact an authorized distributor.

DS28C16EVKIT: Evaluation Kit for the DS28C16 and DS2477
Request Reliability Report for: DS28C16 
Device   Fab Process   Technology   Sample size   Rejects   FIT at 25°C   FIT at 55°C   Material Composition  

Note : The failure rates are summarized by technology and mapped to the associated material part numbers. The failure rates are highly dependent on the number of units tested.

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Related Resources

1-Wire® to I2C/SPI Bridge with Command Sequencer

  • Operate Remote I2C or SPI Devices Using Single-Contact 1-Wire Interface
  • No External Power Required
  • Flexible 1-Wire and I2C/SPI Master Operational Modes
  • Easy to Integrate

I²C Low-Voltage SHA-3 Authenticator

  • Robust Countermeasures Protect Against Security Attacks
  • Efficient Secure Hash Algorithm Authenticates Peripherals
  • Supplemental Features Enable Easy Integration into End Applications

Type ID Title
Evaluation Board10579DS28C16EVKIT Evaluation Kit for the DS28C16 and DS2477