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HT815D0(20DIP) Datasheet

  • HT815D0(20DIP)

  • Speech Synthesizer

  • 173.98KB

  • 15頁(yè)

  • ETC

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HT815D0
11.2-Second LOG-PCM Speech
Features
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Operating voltage: 2.4V~5.0V
Directly drives an external transistor
Low standby current (1mA typ. for V
DD
=3V)
Minimal external components
508 words table ROM for key functions
Programmable silence length and end-pulse
width (minimal end-pulse width is 330ms at a
6kHz sampling rate)
11.2-second voice capacity (based on a 6kHz
sampling rate)
FLAG1 options
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End-pulse output
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3HzB flash
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6HzB flash
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Voice output indication
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Busy output
FLAG2 options
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3Hz flash
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6Hz flash
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Busy output
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Controllable volume
12 keys
Key options
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Stop key: KEY12
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Random (only for KEY1)
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Sequential (only for KEY1)
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Repeat (for all KEYs)
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Key debounce time (for all KEYs): 700ms,
22ms, 45ms, 180ms (based on a sampling
rate of 6kHz)
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One shot (for all KEYs)
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Level-trigger
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Pull-high resistance (for all KEYs)
Section options
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Retriggerable
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Non-retriggerable
Dice form or 16/20/24-pin DIP,
20/24-pin SOP package
Applications
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Leisure products
Alarm clocks
Public address system
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Alert & warning system
Sound effect generators
General Description
The HT815D0 is a single chip LOG-PCM voice
synthesizer LSI with 11.2-second voice capacity
at 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 HT815D0 provides 12 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.
The customer壟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 HT815D0 is excellent for
versatile voice applications.
1
March 15, 2000

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