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ML22Q33x/ML2233x series

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


ML22Q33x BLOCK DIAGRAM/Application Circuit Example

The ML2233x series, which include built-in mask ROM/Flash memories and speaker amplifier, are speech synthesis LSIs that can perform control in serial interface. By using the serial interface, speech playback can be easily performed simply by connecting the LSI to the existing system. The LSI enables easily control of the peripheral circuits such as LED drive and relay ON/OFF with using the existing microcontroller, as well as speech playback. Speech playback of 30 patterns and sequence output are possible. This enables a system to be easily configured by using the logic output of the existing system for the input signals.
For the Flash memory, the customer can write speech data on the customer side by using LAPIS Semiconductor’s dedicated tool.

Playback Time

Part number ROM Capacity
Maximum Playback Time(s) (Fsam=8.0kHz)
ML22Q331/ML22331 896K 35 28 7




Parameter Specification
Part number ML22Q331 ML22331
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, 32.0 kHz
(Each phrase can be specified.)
Playback time fs=8kHz 35 seconds?(HQ-ADPCM)
Analog output Built-in 16-bit D/A converter
Interface Serial Interface
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.