Part No. Internal
Clock		 VDD System
Clock		 Program
Memory		 Data
Memory		 Data
EEPROM		 I/O RTC A/D Timer
Module		 PFD Comp. Interface Stack Package *
HT66F20 4MHz
8MHz
12MHz		 2.2V~
5.5V		 400kHz~20MHz
or 32768Hz		 1Kx14 64x8 32x8 18 v 12-bit
x8		 10-bit CTMx1,
10-bit STMx1		 v 2 SPI/I2C 4 16DIP/NSOP/SSOP,
20DIP/SOP/SSOP

HT66F30

 4MHz
8MHz
12MHz		 2.2V~
5.5V		 400kHz~20MHz
or 32768Hz		 2Kx14 96x8 64x8 22 v 12-bit
x8		 10-bit CTMx1,
10-bit ETMx1		 v 2 SPI/I2C 4 16DIP/NSOP/SSOP
20DIP/SOP/SSOP
24SKDIP/SOP/SSOP
HT66FU30 UART
HT66FB30 USB

HT66F30A

 4MHz
8MHz
12MHz		 2.2V~
5.5V		 400kHz~20MHz
or 32768Hz		 2Kx14 96x8 64x8 22 v 12-bit
x8		 10-bit CTMx1,
10-bit ETMx1		 v 2 SPI/I2C 4 16DIP/NSOP/SSOP
20DIP/SOP/SSOP
24SKDIP/SOP/SSOP
HT66FU30A UART
HT66FB30A USB
HT66F40 4MHz
8MHz
12MHz		 2.2V~
5.5V		 400kHz~20MHz
or 32768Hz		 4Kx15 192x8 128x8 42 v 12-bit
x8		 10-bit CTMx1,
10-bit ETMx1,
16-bit STMx1		 v 2 SPI/I2C 8 24SKDIP/SOP/SSOP
28SKDIP/SOP/SSOP
32/40QFN, 44LQFP
48QFN/SSOP
HT66FU40 UART
HT66FB40 USB

HT66F50

 4MHz
8MHz
12MHz		 2.2V~
5.5V		 400kHz~20MHz
or 32768Hz		 8Kx16 384x8 256x8 42 v 12-bit
x8		 10-bit CTMx2,
10-bit ETMx1,
16-bit STMx1		 v 2 SPI/I2C 8 28SKDIP/SOP/SSOP
40QFN, 44LQFP
48QFN/SSOP
HT66FU50 UART
HT66FB50 USB
HT66F60 4MHz
8MHz
12MHz		 2.2V~
5.5V		 400kHz~20MHz
or 32768Hz		 12Kx16 576x8 256x8 50 v 12-bit
x12		 10-bit CTMx2,
10-bit ETMx1,
16-bit STMx1		 v 2 SPI/I2C 12 40QFN, 44LQFP
48SSOP/LQFP/QFN
52QFP
HT66FU60 UART
HT66FB60 USB
Note:
  1. Part number which include a "U" have an internal UART function; part numbers which include a "B" have a USB interface.
  2. All devices include a fully integrated RC system oscillator.
  3. Four I/O lines on each device can be configured as software LCD COM driver pins.
  4. "*" As not all package types are available for the HT66FUx0 and HT66FBx0 devices, consult the datasheet for exact package details.