HT95R25 Datasheet, Holtek Semiconductor

* Operating voltage at fSYS= 3.58MHz: 2.2V~5.5V
* 16K´16 OTP type Program Memory
* 2112´8 Data Memory
* 50 bidirectional I/Os with pull-high options
*.

Device flexibility is enhanced with their internal special features such as power-down and wake-up functions, DTMF gene.