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ML22Q34x/ML2234x series

Speech Synthesis LSI with CPU interface Built-in Flash/Mask ROM


ML22Q34x BLOCK DIAGRAM/Application Circuit Example

The ML2234x series, which includes built-in Mask ROM/Flash memory and speaker amplifier, consists of speech synthesis LSIs that can be controlled with event input system. Events input by switches or sensors can directly start speech or sound playback. So an audio function can be easily integrated into existing systems. The LSI additionally allows to control peripheral circuits such as LED drive and relay ON/OFF without using a microcontroller.
The LSI, which includes a high-quality (HQ-ADPCM) decoder, a 16-bit DAC, a low-pass filter, and a monaural speaker amplifier, incorporates the peripheral components necessary for speech and sound output in a single chip. Customer can write speech data in the flash memory by using LAPIS Semiconductor's dedicated tool.

Playback Time

Part number ROM Capacity
Maximum Playback Time(s) (Fsam=8.0kHz)
ML22Q341/ML22341 896K 35 28 7




Parameter Specification
Part number ML22Q341 ML22341
Speech synthesis method 4bit ADPCM2, HQ-ADPCM, 8bit PCM,
16bit straight PCM
(Can be specified for each phrase)
Memory type Flash memory Mask ROM
Speech ROM capacity 896Kbit
Sampling frequency
6.4, 8.0, 10.7, 12.8, 16.0, 21.3, 25.6, 32.0kHz
(Can be specified for each phrase)
Playback time fs=8kHz 35 seconds?(HQ-ADPCM)
Analog output Built-in 16-bit D/A converter
Interface Event input system
Maximum event count 30 events
SEQ patterns 26 patterns
Operating power supply voltage +2.2 to +5.5V
Operating temperature range -40°C to +85°C
Flash memory rewrite cycles 80 cycles -
Package 30pin plastic SSOP

*HQ-ADPCM is a high sound quality audio compression technology of "Ky's".
"Ky's" is a registered trademark of National University Corporate Kyushu Institute of Technology.