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TK68HC705B32 Microcontroller

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Available in either the 16K or 32K flash memory sizes

  • Pin compatible, timing compatible replacement for the industry standard 68HC05 family CPU
  • Fully static design supports operation from 0 to 4.2 MHz at 5 volts and 2 MHz at 3 volts
  • Embedded memory with:
    • 176 bytes of RAM
    • 16K or 32K bytes of user Flash
    • 256 bytes of byte erasable EEPROM
    • Security bit for 224 bytes of EEPROM
  • Advanced peripherals including:
    • Three 8-bit parallel I/O ports
    • One 8-bit input-only port
    • 16-bit timer with 2 input captures and 2 output compares
    • 8-channel, 8-bit A/D converter
    • UART (SCI) with independent baud rate selection and receiver wake up function
    • Watchdog timer
    • 5 Interrupt sources
    • 2 PLM systems for D/A use
  • Self test / bootstrap mode
  • Multiple power saving modes
  • On chip crystal oscillator with divide by 2 or divide by 32 modes
  • Optional E-Clock output
  • Available in 52-pin PLCC package
  • -40 to +85°C operating temperature
  • Direct replacement for NXP MC68HC705B16 and MC68HC705B32 microcontrollers


Pin Out




General Description  

The TK68HC705B is a derivative of the HC05 microcontroller architecture. With a rich set of RAM, ROM, and EEPROM memory and a full set of peripherals, the TK68HC705B is well suited to a variety of controller tasks. These parts have been designed to be drop-in replacements for the NXP MC68HC705B16 or MC68HC705B32, with identical code execution, pin compatibility, and equivalent timing.


The data sheet is available here:  pdf TK68HC705B (152 KB)


The data sheet is available here:  pdf Tekmos Device Programmer TK68HC7xx (286 KB)


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