English Chinese (Simplified) Chinese (Traditional) Dutch French German Japanese Polish Portuguese Spanish

80C51 1Header

TK68HC705C9A HC05 Microcontroller, 16K Flash


The TK68HC705C9A can be ordered directly from Tekmos:  Ordering3


The TK68HC705C9A is an 8-bit microcontroller with the following features:

  • Programmable mask option register (MOR) for C9A/C12A configuration
  • Programmable MOR for port B pullups and interrupts
  • Popular M68HC05 central processor unit (CPU)
  • 15,932 bytes of Flash (12,092 bytes for C12A configuration)
  • 352 bytes of RAM (176 for C12A configuration)
  • Memory mapped input/output (I/O)
  • 31 bidirectional I/O lines (24 I/O + 6 input only for C12A configuration) with high current sink and source on PC7
  • Asynchronous serial communications interface (SCI)
  • Synchronous serial peripheral interface (SPI)
  • 16-bit capture/compare timer
  • Computer operating properly (COP) watchdog timer and clock monitor
  • Power-saving wait and stop modes
  • On-chip crystal oscillator connections
  • Single 3.0 volts to 5.5 volts power supply requirement
  • EPROM contents security(1) feature


General Description 

The Tekmos TK68HC705C9A also has a configuration register that allows the part to be re-configured to replace both the MC68HC705C8A and the MC68HC705C12A. An interesting feature of the configuration register is that it changes the physical pinout of the TK68HC705C9A to match the pinout of the MC68HC705C8A.

The TK68HC705C9A uses Flash to replace the original EPROM program storage. This means that while the original parts were OTP (One Time Programmable), the Tekmos version is fully re-programmable. The TK68HC05C9A is a ROM version of the part that provides a low cost solution for high volume production.

Both the TK68HC705C8A and TK68HC705C9A are available in the 44-pin PLCC (FN), 40-pin PDIP (P) and space saving 44-pin PQFP (FB) packages. 



The data sheet is available here: pdf TK68HC705C9A (260 KB)



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


< Prev        Next >