Short-time Playback - Internal D-class Speaker Amplifier Type
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Supporting Information
Speech Synthesis LSIs with Short-time Playback
Internal D-class Speaker Amplifier Type
Overview
Short playback Speech Synthesis LSI has a ROM of 692Kbit to 4Mbit.
The lineup of [Products with Flash memory] and [Products with MaskROM], and can be replaced with complete pin compatibility.
Developed based on Flash memory products, mass production can be carried out with either Mask ROM products or Flash memory shipped blank (unwritten). Select the best format according to application needs.
Product Features
Features 1Integrated oscillator and Class D amp reduce component count
The built-in high accuracy 4.096MHz+1.5% (–10°C to +50°C) oscillator and Class D amp require almost no peripheral parts and enable sound playback by simply connecting to a speaker. In addition, the compact package reduces mounting area.
Applicable Models : ML22Q374、ML22Q394
Features 2Integrated Class D amp ensures the high-efficiency output
Class D speaker amps are capable of 1.0W (Max) output, feature low heat generation even at high (sound) volumes, and minimize heat dissipation measures.
In addition, efficiency is excellent at low battery power, reducing current consumption and prolonging battery life.
Applicable Models : ML22Q374、ML22Q394
Feature 3Built-in disconnection detection function eliminates the need to worry about speaker failure
The ML223xx series includes a disconnection detection function that can provide notification (i.e. via LED) in the event no sound is output due to disconnection between the speaker amp and speaker. Passing current between SPP and SPM enables detection through High/Low determination. This ensures worry-free operation even in the event of speaker disconnection.
Applicable Models : ML22Q374、ML22Q394
Applications
LAPIS TECHNOLOGY™ 's Short Playback Speech Synthesis LSI is ideal for sound effects and warning sounds in rice cookers, air conditioners, remote controllers for hot water supply, toys, alarm clocks, etc. lasting from tens of seconds to several minutes.
Two types are available: MaskROM for mass production and Flash memory with rewritable data.
"LAPIS TECHNOLOGY™" is a trademark or a registered trademark of ROHM Co., Ltd.