
Rev. 2.50
�0
��ne 22� 20��
Rev. 2.50
��
��ne 22� 20��
HT66F20/HT66F30/HT66F40/HT66F50/HT66F60
HT66FU30/HT66FU40/HT66FU50/HT66FU60
A/D Flash MCU with EEPROM
HT66F20/HT66F30/HT66F40/HT66F50/HT66F60
HT66FU30/HT66FU40/HT66FU50/HT66FU60
A/D Flash MCU with EEPROM
Selection Table
Most features are common to all devices, the main feature distinguishing them are Memory capacity,
I/O count, TM features, stack capacity and package types. The following table summarises the main
features of each device.
Part No.
V
DD
Program
Memory
Data
Memory
Data
EEPROM I/O
Ext.
Int.
A/D
Timer
Module
Interface
(SPI/I
2
C) UART Stacks
Package
HT66F20
2.2V~5.5V
�k�4
64×8
32×8
�8
2
�2-bit×8 �0-bit CTM×�
�0-bit STM�
√
—
4
�6DIP/NSOP/SSOP
20DIP/SOP
HT66F30
2.2V~5.5V
2k�4
96×8
64×8
22
2
�2-bit×8 �0-bit CTM×�
�0-bit ETM�
√
—
4
�6DIP/NSOP/SSOP
20DIP/SOP/SSOP
24SOP/SSOP
HT66FU30
�4
√
24SOP
HT66F40
2.2V~5.5V
4k�5
�92×8
�28×8
42
2
�2-bit×8
�0-bit CTM�
�0-bit ETM�
�6-bit STM�
√
—
8
24/28SKDIP/SOP/SSOP
44LQFP� 32/40QFN
48SSOP/QFN
HT66FU40
34
√
40QFN� 44LQFP
48SSOP/QFN
HT66F50
2.2V~5.5V
8k�6
384×8
256×8
42
2
�2-bit×8
�0-bit CTM×2
�0-bit ETM�
�6-bit STM�
√
—
8
28SKDIP/SOP/SSOP
44LQFP� 40QFN
48SSOP/QFN
HT66FU50
34
√
44LQFP� 48QFN
HT66F60
2.2V~5.5V �2k�6
5�6×8
256×8
42
4
�2-bit�2
�0-bit CTM×2
�0-bit ETM�
�6-bit STM�
√
—
�2
28SOP
40/48QFN� 44/48LQFP
48SSOP
HT66FU60
34
√
40QFN� 44LQFP
48LQFP/QFN
Note: As devices exist in more than one package format, the table reflects the situation for the package with the
most pins.
There is an additional peripheral known as the UART module in HT66FU30, HT66FU40, HT66FU50 and
HT66FU60 devices. All information related to the UART Module will be described in the following UART
Module section.