DeepCover Secure Authenticator with ISO 15693, SHA-256, and 4Kb User EEPROM

Industry's First SHA-256 Symmetric Key-Based Authenticator

Please check latest availability status for a specific part variant.


DeepCover® embedded security solutions cloak sensitive data under multiple layers of advanced physical security to provide the most secure key storage possible.

The DeepCover Secure Authenticator (MAX66240) is a transponder IC that combines an ISO/IEC 15693 and ISO 18000-3 Mode 1-compatible RF front-end, a FIPS 180-based SHA-256 engine, and 4096 bits of user EEPROM in a single chip. A bidirectional security model enforces two-way authentication between a host system and the MAX66240. Each device has its own guaranteed unique 64-bit ROM ID that is factory programmed into the chip. This ROM ID is used as a fundamental input parameter for cryptographic operations and serves as an electronic serial number within the application.

Key Features

  • Dedicated Hardware-Accelerated SHA Engine
  • Strong Authentication with a High Bit Count User-Programmable Secret and Input Challenge
  • 4096 Bits of User EEPROM with User-Programmable R/W Protection Options Including OTP/EPROM Emulation Mode
  • Unique Factory-Programmed 64-Bit Identification Number
  • ISO/IEC 15693: Up to 26kbps
  • ±2kV HBM ESD Protection for All Pins


  • Access Control
  • Asset Tracking
  • Medical Sensor Authentication and Calibration
  • Printer Cartridge Configuration and Monitoring
  • System Intellectual Property Protection
Part NumberProtocolFunctionsApplicationsMemory TypeMemory SizeSecurity FeaturesOper. Temp.
MAX66240 ISO15693Tag
Access Control
Asset Tracking
Electronic Access Control
IP Protection
Medical Sensor Authentication and Calibration
Printer Cartridge Configuration and Monitoring
System Intellectual Property Protection
4K bits
4K x 1
Write-Only Secrets
-20 to +85
SOIC (N)/8
See All NFC/RFID Products (3)

Part NumberCrypto EngineBus TypeDeep CoverPackage/Pins
MAX66240 SymmetricISO 15693Yes
See Data Sheet
See All Secure Authenticators (28)
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.

MAX66240EVKIT: Tag Evaluation Kit for the MAX66240, Requires NFC Reader
MAX66300-24XEVKIT: Reader and Tag Evaluation Kit for the MAX66300/MAX66240/MAX66242

Technical Documents

App Note 5995 Need NFC/RFID? Tomorrow Is Today in This Constant State of Innovation
App Note 5921 Designing an Antenna for MAX66300

Quality and Environmental Data

Product Reliability Reports: MAX66240.pdf 
Lead-Free Package Tin (Sn) Whisker Reports

CAD Symbols and Footprints

  • MAX66240ESA+
  • MAX66240ESA+T
  • MAX66240ETB+
  • MAX66240ETB+T
  • MAX66240ISA+
  • MAX66240ISA+T
  • Device   Fab Process   Technology   Sample size   Rejects   FIT at 25°C   FIT at 55°C  

    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.

    Quality Management System >
    Environmental Management System >


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