ST23 Dual Interface Secure MCU with 80 KBytes of EEPROM, enhanced security and Nescrypt cryptoprocessor, RF Type B (Contactless High end ID-Passport/PKI)

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  • The ST23YR80 is a serial access secure microcontroller custom-designed for secure smartcard applications.

    It is based on an enhanced STMicroelectronics 8/16-bit CPU core offering 16 Mbytes linear addressing space. ST23YR80 devices are manufactured using an advanced highly reliable ST CMOS EEPROM technology.
    An RF Interface including an RF universal asynchronous receiver transmitter (RFUART) enables contactless communication up to 848 Kbits/s compatible with the ISO/IEC 14443-B standard.
    Moreover, an ISO/IEC 7816-3 EMV-compliant asynchronous receiver transmitter (IART) communication peripheral is available.

    Key Features

    • Hardware features
      • Enhanced 8/16-bit ST23 CPU core with 16 Mbytes linear addressable memory
      • 390 Kbytes of User ROM
      • 6 Kbytes of User RAM
      • 2 Kbytes of NESCRYPT RAM
      • 80 Kbytes of User EEPROM including 128 bytes of User OTP area:
        • 30-year data retention at 25° C
        • 500,000 Erase/Write cycles endurance typical at 25° C
        • 1 to 64 bytes Erase or Program in 1.5 ms
      • Operating temperature: –25° to +85° C (certain restrictions apply)
      • Three 8-bit timers with watchdog and interrupt capability
      • 3 V and 5 V supply voltage ranges
      • External clock frequency up to 10 MHz
      • High performance provided by:
        • CPU clock frequency up to 29 MHz
      • Power-saving Standby state
      • Contact assignment compatible with ISO/IEC 7816-3 standards
      • Asynchronous receiver transmitter (IART) for high speed serial data support(ISO/IEC 7816-3 and EMV™ compliant)
      • ESD protection greater then 6 kV (HBM) for contact pads and 4 kV for contactless pads
    • Contactless features
      • Complies with ISO/IEC 14443 Type B standards
      • 13.56 MHz carrier frequency
      • 512-byte RF frame buffer in dedicated RFUART RAM
      • RFUART (RF universal asynchronous receiver transmitter) up to 848 Kbps
      • BPSK - NRZ load modulation (card-to-reader)
      • 8 to 14% amplitude modulation reception (reader to card) as minimum range
      • Enhanced RF performance provided by CPU clock frequency up to 29 MHz coupled with clock frequency divider
    • Security features
      • Active shield
      • Enhanced NESCRYPT crypto-processor for public key cryptography
      • Hardware security enhanced DES accelerator
      • Monitoring of environmental parameters
      • Protection mechanisms against faults
      • AIS-31 class P2 compliant true random number generator (TRNG)
      • ISO 3309 CRC calculation block
      • Memory protection unit (MPU)
      • Unique serial number on each die
    • Development environment
      • Reference implementation compatible with ISO/IEC 14443 standards
      • Software development and firmware generation are supported by a comprehensive set of development tools dedicated to software design and validation: C compiler, simulator and emulator

Circuit Diagram

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DICE 5A002A1 - No availability of distributors reported, please contact our sales office


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(*) Suggested Resale Price per unit (USD) for BUDGETARY USE ONLY. For quotes, prices in local currency, please contact your local ST Sales Office  or our Distributors

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Technical Documentation

    • Description Version Size Action
      Dual contactless secure MCU with 80-Kbyte EEPROM, enhanced security, cryptoprocessor and optimized RF performance
      225.44 KB

      Dual contactless secure MCU with 80-Kbyte EEPROM, enhanced security, cryptoprocessor and optimized RF performance

Publications and Collaterals

    • Description Version Size Action
      Brochure Secure MCUs - Secure Solutions 1.2
      1.11 MB

      Brochure Secure MCUs - Secure Solutions

Part Number Marketing Status Package Grade RoHS Compliance Grade Material Declaration**
DICE Industrial N/A




Material Declaration**:

Marketing Status






RoHS Compliance Grade


(**) The Material Declaration forms available on may be generic documents based on the most commonly used package within a package family. For this reason, they may not be 100% accurate for a specific device. Please contact our sales support for information on specific devices.