ST23ZL34 Active

Supply Voltage Min Volt2.7
Supply Voltage Max Volt5.5
CoreST23
ECCN USEAR99
ECCN EUNEC
Packing TypeNot Applicable
ROHS Compliance GradeN/A
GradeIndustrial
Package NameDICE
Key Features
  • Hardware features
    • Enhanced 8/16-bit ST23 CPU core with 16 Mbytes of linear addressable memory
    • 300 Kbytes of User ROM
    • 6 Kbytes of User RAM
    • 2 Kbytes of NESCRYPT RAM
    • 34 Kbytes of User EEPROM including 128 bytes of User OTP area:
      • Highly reliable CMOS EEPROM submicron technology
      • 30-year data retention
      • 500,000 Erase/Write cycles endurance typical at 25° C
      • 1 to 64 bytes Erase or Program in 1.5 ms
    • Three 8-bit timers with watchdog and interrupt capability
    • 3.3 V and 5 V supply voltage ranges
    • External clock frequency up to 10 MHz
    • High performance provided by:
      • CPU clock frequency up to 27 MHz
    • Power-saving Idle 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 than 5 kV (HBM)
  • 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/IEC 13239 CRC calculation block
    • Memory protection unit (MPU)
    • Unique serial number on each die
  • Development environment
    • 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

The ST23ZL34 is a serial access microcontroller custom-designed for secure smartcard applications.


It is based on an enhanced STMicroelectronics 8/16-bit CPU core offering 16 Mbytes of linear addressing space. ST23ZL34 devices are manufactured using an advanced highly reliable ST CMOS EEPROM technology.


Moreover, an ISO/IEC 7816-3 EMV-compliant asynchronous receiver transmitter (IART) communication peripheral is available.

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