HT81003 -- EasyVoiceTM 3-Second Speech

General Description

The HT81003 is a Mask ROM type. The HT81003 is a single-chip voice synthesizer LSI with 3-second voice capacity at 5kHz sampling rate. The chip when triggered drives a speaker through an external transistor with a PWM output. Negligible current is consumed in the standby state.

The HT81003 provides 2-key inputs and 2 programmable FLAG outputs. With 2.4V~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 instructions of section playback arrangement of each key are stored in the table ROM. The key features are also programmable. With such a flexible structure, the HT81003 is excellent for versatile voice applications.

Features

  • Operating voltage: 2.4V~5V
  • Directly drives an external transistor
  • PWM function directly driver speaker
  • Low standby current (1uA typ. for VDD=3V)
  • Minimal external components
  • 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)
  • 3-sec voice capacity (based on a 5kHz 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
  • 2 keys
  • Key options
    - Sequential/Directed
    - Repeat (KEY2)
    - STOP key (KEY2)
    - Key debounce time: 1.2ms, 22ms,45ms (based on a 8kHz sampling rate)
    - One shot/Normal
    - Pull-high resistance: 0, 50kW,100kW, 200kW
  • Section options
    - Retriggerable
    - Non-retriggerable
  • Dice form or 16-pin DIP package

Technical Document

Other Information