FEDL22Q374-07
Issue Date: May. 17, 2021
ML22Q374/ML22Q374P
ADPCM Speech Synthesis LSI
■ GENERAL DESCRIPTION
ML22Q374/ML22Q374P is voice synthesis LSI with built-in Flash memory that stores speech data.
This LSI includes edit ROM, ADPCM2 decoder, low pass filter and D-class speaker amplifier. Also,
ML22Q374/ML22Q374P support the synchronous serial interface.
By integrating all the functions required for voice output into a single chip, this LSI can be more easily
incorporated in compact portable devices.
•Built-in memory capacity and maximum playback time:
Maximum playback time (sec) (at fs=8.0kHz)
Product name
ROM capacity
692 Kbits
4bitADPCM2
16bitPCM
ML22Q374
ML22Q374P
22.1
5.5
Notes: ROM capacity shows the numerical value of only a voice area.
•Voice synthesis method:
4-bit ADPCM2
8-bit Nonlinear PCM
8-bit PCM , 16-bit PCM
Can be specified for each phrase.
ML22Q374/ML22Q374P:
•Speech ROM capacity
692-Kbit Flash
•Sampling frequency(Fs):
6.4 / 8.0 / 10.7 / 12.8 / 16.0 / 21.3 / 25.6 / 32.0 kHz
fs can be specified for each phrase.
Built-in D-class amplifier
•Analog output:
•CPU command interface:
•Maximum number of phrases:
Synchronous serial interface
30 phrases
•Disconnection detection function /Speaker pin short detection function
•Source oscillation frequency:
•Power supply voltage:
4.096 MHz(internal)
2.0 to 5.5V
•Flash memory rewritable time:
•Operating temperature range:
80 times
–40 to +85°C (ML22Q374)
–40 to +105°C (ML22Q374P)
•AEC-Q100 Compliant
•Product name:
16-pin plastic SSOP
ML22Q374-NNNMB, ML22Q374-xxxMB(xxx: ROM code No.)
20-pin plasticTSSOP
ML22Q374-NNNTD/ML22Q374-xxxTD
ML22Q374P-NNNTD/ML22Q374P-xxxTD
(xxx: ROM code No.)
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