HT819D0 데이터 시트보기 (PDF) - Holtek Semiconductor
부품명
상세내역
제조사
HT819D0 Datasheet PDF : 13 Pages
| |||
HT819D0
4.2 Second LOG-PCM Speech
Features
• 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
• 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 sam-
pling rate of)
– One shot (for all KEYs)
– Pull-high resistance (for all KEYs)
• Dice form or 16-pin DIP/SOP
Applications
• Toys
• Alarm clocks
• Public address system
General Description
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 trig-
gered drives a speaker through an external
transistor with a current switch D/A converter
output. Negligible current will be consumed in
the standby state.
The HT819D0 provides 6 key inputs and 2 pro-
grammable FLAG outputs. With a 2.4V~5.0V
power supply, a complete synthesized voice
playback system can be easily built with very
few external components.
• Alert and warning system
• Sound effect generators
The customer’s voice sources are recorded sec-
tion by section into an internal mask ROM. The
sectional playback arrangement instructions of
each key are stored in the table ROM. The key
features are also programmable. With such a
flexible structure, the HT819D0 is excellent for
versatile voice applications.
1
6th May ’98
Share Link: 