A lineup of highly reliable in-vehicle devices with various fail-safe functions.

Speech Synthesis LSI series

A lineup of highly reliable in-vehicle devices with various fail-safe functions.

Speech Synthesis LSI series

Automotive-grade Speech Synthesis LSI "ML22530" Video

Supporting communication between people and vehicles with sound, realizing a safe, secure, and comfortable driving environment.

Introduction of Speech Synthesis LSI "ML22530 Family"

08:29  

LAPIS Semiconductor's Speech Synthesis LSI 4 points!

"Easy" "High sound quality" "Multifunctional" "Space saving"
A high-quality audio solution can be immediately realized on your device.

Lapis' Speech Synthesis LSI is  easy

  • Audio can be output simply by sending simple commands from the microcontrollers.

Lapis' Speech Synthesis LSI has  multiple functions

  • Built-in various functions related to sound. Equipped with fail-safe functions such as abnormal sound detection for vehicles.
  • Multiple voice simultaneous utterance function.
  • Editing ROM function etc.
 

Lapis Speech Synthesis LSI has  high sound quality

  • Sampling frequency up to 48kHz (middleware is typically 8-12kHz).
  • Built-in high performance DAC and filter.

Lapis' Speech Synthesis LSI  saves space

  • Built-in from voice synthesis engine to speaker amplifier, almost no external parts needed.
  • Reduce the risk of failure rate rise by reducing the number of parts.

Please leave "sound making"

Lapis Semiconductor's speech synthesis solution provides one-stop support
for "voice recording", "melody creation", "sound editing", "data writing, and shipping".
You can also select a sound from a "rich audio library" without having to make a sound.
We easily realize "I want to make a sound!".

Customer work

STEP 1   Select LSI by application and ROM capacity

  • Select an LSI according to your requirements such as application, playback time, required functions, etc.
 

STEP 2   Create phrase list

 
 

Our and / or customer work

STEP 3   Original sound creation

  • Select from studio recording, melody / sound effect creation, and audio library
 

STEP 4   Voice analysis and editing

  • Carving, volume control, splicing, equalizing
 

STEP 5   Complete sound data, write to ROM, and ship

 

High reliability -40°C to +105°C Suitable for automotive applications

"AEC-Q100 Grade 2 and products meeting the requirements of the standard" "Manufacturing in IATF 16949 certified facility"
Supporting automotive applications for customers in harsh environments.

AEC-Q100 qualified product suitable
for automotive applications

LAPIS Semiconductor offers AEC-Q100 qualified products and products that meet the requirements for automotive applications.
AEC-Q100 is an industry standard for automotive reliability of automotive integrated circuits (ICs), and is widely adopted as a standard for automotive electronic components in Europe and the United States.
The AEC-Q100 has different grades according to the operating temperature range of the IC. LAPIS Semiconductor's Speech Synthesis LSI for automotive applications belongs to [Grade 2] of -40°C to +105°C.
 AEC-Q100 test Items
  • Environmental stress test
  • Accelerated life test
  • Package assembly maintenance test
  • Die level reliability test
  • Confirmation of electrical characteristics
  • Cavity-package test, etc

Manufacturing in a new IATF 16949 certified facility for the automotive industry

Speech Synthesis LSIs manufactured by LAPIS Semiconductor are manufactured at IATF 16949 certified facilities.
The International Automotive Task Force (IATF) is a new quality management system standard for the automotive industry that replaces ISO / TS 16949.
Manufactured in IATF 16949 certified facility, we will provide stable and better quality products.
All production sites acquired IATF 16949 certification
LAPIS Semiconductor Quality / Quality management system : ISO9001, standard for the automotive industry : IATF16949 Ensuring high reliability and quality stability.

LAPIS Semiconductor Quality

Quality management system: ISO9001, standard for the automotive industry: IATF16949
Ensuring high reliability and quality stability.

Features and functions

Automotive-grade products are equipped with "various fail-safe functions"
Monitors various LSI abnormalities and further enhances the safety of your automotive applications.

Features and functions. 1   
Built-in speaker amp ensures stable operation at +105°C
Automotive-grade Speech Synthesis LSIs are offered featuring a guaranteed operating temperature range of –40°C to +105°C. Integrated memory and speaker amp, together with support for high temperature operation, ensure worry-free use in automotive applications.
The exposed backside die pad enables heat dissipation through the substrate, making it possible to suppress temperature rise within the LSI (including the speaker amp) and ensure stable performance even at an ambient temperature of +105°C.
Features and functions. 2   
Voice data can be rewritten even after customer's product shipment
[Flash memory] and [External flash memory] can rewrite audio data via the SPI I/F of the microcontroller.
Voice data can be rewritten in the field after the customer's product is shipped..
Features and functions. 3   
Equipped with a variety of fail-safe functions
Multiple built-in fail-safe functions, such as for detecting playback abnormalities, speaker pin short-circuits, internal LSI temperature, supply voltage drops, and MCU command transfer errors, make it possible to monitor for a variety of LSI failure modes.

LSI lineup

Comparison of memory capacity and type and playback time of each series

  • ROM (bit)
  •  
  • 0.692M
  • 2M
  • 4M
  • 6M
  • 8M
  • 16M
  • 32M
  •  
  • 128M
For automotive applications
  • flash : ML2253x series [Writable by CPU command I/F (in SPI)]
  • flash : ML2257x series
  • flash : ML223xx series
  • MaskROM : ML2253x series
  • External memory : ML2257x series [Writable by CPU command I/F (at SPI)]
  • External memory : ML2257x series
For industry and applications
Long playback
  • flash : ML226xx series [Writable by CPU command I/F (at SPI)]
  • P2ROM : ML228xx series
  • P2ROM : ML227xx series
Short playback
  • flash : ML2256x series
  • flash : ML223xx series
  • MaskROM : ML2256x series
Supports external memory
  • External memory : ML226xx series [Writable by CPU command I/F (at SPI)]
  • External memory : ML224xx series
  •  
  • 27sec.
  • Play time
  • 1,044sec.
    (17min. 24sec.)
  • Ideal for
    sound effects

  • Ideal for
    guidance

  • Automotive-grade

  • Long playback

  • Short playback

  • External memory

Automotive-grade Speech Synthesis LSI (Flash memory, Mask, External)

  data
Sheet
Operating
voltage
(V)
Operating
frequency
(MHz)
Oscillator Operating
temperature
(°C)
ROM
capacity
(bit)
Number of
phrases
Maximum
playback

time
CPU
I/F
SP
amplifier
output
(W) / class
Mixing
number
(internal)
(ch)
Other PKG Halogen-free
compatible*6
For
automotive*8
Sample
and
Buy
  • *1 : Maximum playback time when sampling frequency is 6.4kHz with HQ-ADPCM.
  • *2 : Maximum playback time when sampling frequency is 6.4kHz in ADPCM2.
  • *3 : When using an external memory (Max. 128Mbit), the maximum playback time when the sampling frequency is 6.4kHz with HQ-ADPCM.
  • *4 : Built-in Mask ROM is 6Mbit and external memory (Max.128Mbit) can be connected.
  • *5 : MTotal value of 512 phrases built-in Mask and 512 phrases in external memory.
  • *6 : Halogen-free compatible mark: Halogen-free compatible products are available. Contact your sales representative for details.
  • *7 : For clock synchronous serial.
  • *8 :  Is a vehicle compatible product.   Can provide AEC-Q100 qualified products.

Long Playback (Flash memory, P2ROM™: read-only memory for short delivery time)

  data
Sheet
Operating
voltage
(V)
Operating
frequency
(MHz)
Oscillator Operating
temperature
(°C)
ROM
capacity
(bit)
Number of
phrases
Maximum
playback

time
CPU
I/F
SP
amplifier
output
(W) / class
Mixing
number
(internal)
(ch)
Other PKG Halogen-free
compatible*3
Sample
and
Buy
  • *1 : Maximum playback time when sampling frequency is 6.4kHz in ADPCM2.
  • *2 : 1024 phrases (1 bank) × 4 banks
  • *3 : Halogen-free mark : Halogen-free products are available. Contact your sales representative for details.
  • *4 : Maximum playback time when sampling frequency is 6.4kHz with HQ-ADPCM.
  • *5 : 256 phrases (1 bank) × 2 banks.
  • *6 : 256 phrases (1 bank) × 4 banks.

Short Playback (Flash memory, MaskROM)

  Data
sheets
Operating
voltage
(V)
Operating
frequency
(MHz)
Oscillator Operating
temperature
(°C)
ROM
capacity
(bit)
Number of
phrases
Maximum
playback

time
CPU
I/F
SP
amplifier
output
(W) / class
Mixing
number
(internal)
(ch)
Other PKG Halogen-free
compatible*3
For
automotive*4
Sample
and
Buy
 

There are no corresponding products.

  • *1 : Maximum playback time when sampling frequency is 6.4kHz with HQ-ADPCM.
  • *2 : Maximum playback time when sampling frequency is 6.4kHz in ADPCM2.
  • *3 : Halogen-free compatible mark: Halogen-free compatible products are available. Contact your sales representative for details.
  • *4 :  Is a vehicle compatible product.   Can provide AEC-Q100 qualified products.

Speech Synthesis LSI for External Memory

  data
Sheet
Operating
voltage
(V)
Operating
frequency
(MHz)
Oscillator Operating
temperature
(°C)
ROM
capacity
(bit)
Number of
phrases
Maximum
playback
time
CPU
I/F
SP
amplifier
output
(W) / class
Mixing
number
(internal)
(ch)
Other PKG Halogen-free
compatible*3
Sample
and
Buy
  • *1 : Maximum playback time when sampling frequency is 6.4kHz in ADPCM2.
  • *2 : When using an external memory (Max. 128Mbit), the maximum playback time when the sampling frequency is 6.4kHz with HQ-ADPCM.
  • *3 : Halogen-free compatible mark: Halogen-free compatible products are available. Contact your sales representative for details.
Application : Automotive
EV / HV AVAS
EV / HV startup sound
EV / HV pseudo engine sound
Voice of parking
assist system
Warning sound
(seat belt / half door)
Operation sound
(Blinkers)
Industrial equipment, consumer products
Elevator: voice guidance
Card reader:
voice guidance
Security: voice guidance
Home appliances:
voice guidance
Various alarms:
warning sound
Housing equipment:
Operation sound
Remote control:
operation sound
Home appliances:
operation sounds

Development support tool

Sound device control kit "SDCK"

This is a development tool that can perform everything from the creation of voice data to the writing of voice data into the voice synthesis LSI, to the trial listening.

* Two types, "SDCK" and "SDCK3", are available depending on the target LSI. For details, refer to “Lineup”.

Software
Speech LSI Utility

A tool to create voice data for speech synthesis LSI.

The created audio data can be simulated on a PC.

Wave Editor

A tool for editing the waveform of original sound data.

SDCB Controller

This is a tool for writing data to the Speech Synthesis LSI on the reference board via the following hardware SDCB and for listening.

Commands to be sent to the Speech Synthesis LSI can be easily operated in GUI format.

Hardware
Sound Device Control Board "SDCB2" "SDCB3"

This tool is to write data to the Speech Synthesis LSI on the reference board and to audition according to the operation of the SDCB Controller.

The reference board is replaceable and supports the Speech Synthesis LSI of the connected reference board.

* Writing for mass production is not covered by the warranty. For mass production, please use the writing shipment at the LAPIS Semiconductor factory or use an on-board writer.

* Two types, "SDCB2" and "SDCB3", are available depending on the target LSI. For details, refer to “Lineup”.

Reference board (sold separately)

It is prepared according to each Speech Synthesis LSI.

Each board is equipped with a speaker jack, so you can easily listen to it just by connecting a speaker.
It can also be used when connected to your system board.

  Possible to purchase online  

Contact us

Please contact us here for purchasing LSIs and development tools, technical questions, etc.

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