HT81R18
HT81R18 is EasyVoice Speech manufactured by Holtek Semiconductor.
- Part of the HT81R03 comparator family.
- Part of the HT81R03 comparator family.
HT81xxx EasyVoiceTM Speech
Features
- Operating voltage: 2.4V~5V
- Directly drives an external transistor
- PWM function directly driver speaker
- Low standby current (1mA typ. for VDD=3V)
- Minimal external ponents
- 240 notes table ROM for key functions
- Programmable silence length and end-pulse width
(minimal end-pulse width is 1.3ms at 8kHz sampling rate)
- Controllable volume
- FLAG1 options
- End-pulse output
- 3Hz, 3HzB flash
- 6Hz, 6HzB flash
- Busy output
- OFF
- FLAG2 options
- 3Hz flash
- 6Hz flash
- Busy output
- OFF
- 6 keys (Directed)
- 8 keys (Matrix key)
- Key options
- Sequential/Directed
- Repeat (KEY2~KEY6)
- STOP key (KEY6)
- Key debounce time: 1.2ms, 22ms,...
