Holtek Semiconductor HT819D0
The HT819D0 is a single chip LOG-PCM voice synthesizer LSI with 4.2-second voice capacity at a 6kHz sampling rate. The chip when triggered drives a speaker through an external transistor with a current switch D/A converter output. The HT819D0 provides 6 key inputs and 2 programmable FLAG outputs.| Part No. | HT819D0 |
|---|---|
| Datasheet | HT819D0 Download |
| Manufacturer |  Holtek Semiconductor |
| Description | 4.2 Second LOG-PCM Speech |
| Buy | Stock & Price |
FEATURES
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● Operating voltage: 2.4V~5.0V Directly drives an external transistor Low standby current (1µA typ. for VDD=3V) Minimal external components 252 words table ROM for key functions Programmable silence length and end-pulse width (minimal end-pulse width is 330µs at a 6kHz sampling rate) 4.2-second voice capacity Section options: – Retriggerable – Non-retriggerable FLAG1 options: – End-pulse output – 3HzB flash – 6HzB flash – Voice output indication – Busy output
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● FLAG2 options: – 3Hz flash – 6Hz flash – Busy output Controllable volume 6 keys Key options: – Stop key: KEY6 – Random (only for KEY1) – Sequential (only for KEY1) – Repeat (for all KEYs) – Key debounce time (for all KEYs): 700µs, 22ms, 45ms, 180ms (based on a 6kHz sampling rate of) – One shot (for all KEYs) – Pull-high resistance (for all KEYs) Dice form or 16-pin DIP/SOP
APPLICATIONS
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● Toys Alarm clocks Public address system
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● Alert and warning system Sound effect generators
GENERAL DESCRIPTION
Negligible current will be consumed in the standby state.
