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HT818D0

Features: ` Operating voltage: 3.6V~5.0V` Directly drives an external transistor` Low standby current (1A typ. for VDD=3V)` Minimal external components` 508 words table ROM for key functions` Programmable silence length and end-pulse width (minimal end-pulse width is 330s at a 6kHz sampling rate)...

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SeekIC No. : 004367026 Detail

HT818D0: Features: ` Operating voltage: 3.6V~5.0V` Directly drives an external transistor` Low standby current (1A typ. for VDD=3V)` Minimal external components` 508 words table ROM for key functions` Progra...

HT818D0 Data Sheet

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Part Number:
HT818D0
Supply Ability:
5000

Price Break

  • Qty
  • 1~5000
  • Unit Price
  • Negotiable
  • Processing time
  • 15 Days
Total Cost: $ 0.00

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Upload time: 2024/12/21

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Product Details

Description



Features:

` Operating voltage: 3.6V~5.0V
` Directly drives an external transistor
` Low standby current (1A typ. for VDD=3V)
` Minimal external components
` 508 words table ROM for key functions
` Programmable silence length and end-pulse width (minimal end-pulse width is 330s at a 6kHz sampling rate)
` 22.4-second voice capacity (based on a 6kHz sampling rate)
` 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
` 12 keys
` Key options
- Stop key: KEY12
- Random (only for KEY1)
- Sequential (only for KEY1)
- Repeat (for all KEYs)
- Key debounce time (for all KEYs): 700s, 22ms, 45ms, 180ms (based on a 6kHz sampling rate)
- One shot (for all KEYs)
- Level-trigger
- Pull-high resistance (for all KEYs)
` Dice form or 20/24-pin DIP/SOP package


Application

· Leisure products
· Alarm clocks
· Public address system
· Alert and warning system
· Sound effect generators


Pinout

Connection Diagram


Specifications

Supply Voltage ............................-0.3V to 6V
Input Voltage ..............VSS-0.3V to VDD+0.3V
Storage Temperature ............. -50 to 125
Operating Temperature .............-20 to 70

Note: These are stress ratings only. Stresses exceeding the range specified under "Absolute Maximum Ratings" may cause substantial damage to the device. Functional operation of this device at other conditions beyond those listed in the specification is not implied and prolonged exposure to extreme conditions may affect device reliability.


Description

The HT818D0 is a single chip LOG-PCM voice synthesizer LSI with 22.4-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. Negligible current will be consumed in the standby state.

The HT818D0 provides 12 key inputs and 2 programmable FLAG outputs. With a 3.6V~5.0V power supply, a complete synthesized voice playback system can be easily built with very few external components.

The customer's voice sources are recorded section 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 HT818D0 is excellent for versatile voice applications.

 




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