Part No. Internal
Clock		 Input
Voltage		 System
Clock		 Program
Memory		 Data
Memory		 Data
EEPROM		 I/O RTC A/D Timer
Module		 PFD Comp. Stack Package
HT68F03M 4MHz
8MHz
12MHz		 0.7V~
3.3V		 32kHz~
12MHz		 1Kx14 64x8 64x8 8 v -- CTM 10-bitx1
STM 10-bitx1		 v 1 4 16NSOP
HT68F04M 4MHz
8MHz
12MHz		 0.7V~
3.3V		 32kHz~
12MHz		 2Kx15 96x8 64x8 8 v -- CTM 10-bitx1
STM 10-bitx1		 v 1 8 16NSOP
HT66F03M 4MHz
8MHz
12MHz		 0.7V~
3.3V		 32kHz~
12MHz		 1Kx14 64x8 64x8 8 v 12-bitx4 CTM 10-bitx1
STM 10-bitx1		 v 1 4 16NSOP
HT66F04M 4MHz
8MHz
12MHz		 0.7V~
3.3V		 32kHz~
12MHz		 2Kx15 96x8 64x8 8 v 12-bitx4 CTM 10-bitx1
STM 10-bitx1
ETM 10-bitx1		 v 1 8 16NSOP

Note: The internal clock in the table is a fully integrated RC oscillator requiring no external components which can be used as the system clock.
Part No. Internal
Clock		 Input
Voltage		 System
Clock		 Program
Memory		 Data
Memory		 Data
EEPROM		 I/O A/D Timer
Module		 PFD Comp. Stack Package
HT68F016L* 8MHz 0.9V~
1.8V		 32kHz~
12MHz		 1Kx16 64x8 64x8 13 -- CTM 16-bitx1
STM 16-bitx1		 v 1 8 10MSOP
16DIP/NSOP/SSOP
HT68F017L* 8MHz 0.9V~
1.8V		 32kHz~
12MHz		 2Kx16 96x8 64x8 13 -- CTM 16-bitx1
STM 16-bitx1		 v 1 8 10MSOP
16DIP/NSOP/SSOP
HT66F016L* 8MHz 0.9V~
1.8V		 32kHz~
12MHz		 1Kx16 64x8 64x8 13 12-bitx4 CTM 16-bitx1
STM 16-bitx1		 v 1 8 10MSOP
16DIP/NSOP/SSOP
HT66F017L* 8MHz 0.9V~
1.8V		 32kHz~
12MHz		 2Kx16 128x8 64x8 13 12-bitx4 CTM 16-bitx1
STM 16-bitx1		 v 1 8 10MSOP
16DIP/NSOP/SSOP

* Under development, available in 1Q, 2012.
Note: The internal clock in the table is a fully integrated RC oscillator requiring no external components which can be used as the system clock.