LAPIS Semiconductor Co., Ltd. 
Applications
Description
ML2257x
package dimension figure
The ML22Q573/ML2257x series is a high-quality speech synthesis LSI with built-in Mask ROM/Flash memory suitable for automotive applications. 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. The LSI contains a variety of functions including 4-channel simultaneous playback, volume control and edit ROM function for efficient memory usage.
Playback Time
| Part number | Memory Type | ROM Capacity (bits) |
Maximum Playback Time(s) | ||
|---|---|---|---|---|---|
| fs=8.0k | fs=16.0k | fs=32.0k | |||
| ML22Q573 | Flash | 4M | 161 | 80 | 40 |
| ML22573 | Mask | ||||
| ML22572 | 2M | 79 | 39 | 19 | |
Feature
- Built-in high-quality decoder (HQ-ADPCM)
- Built-in speaker amplifier (1.0W/5V using 8Ω speaker)
- Built-in external analog mixing function
- Power-supply-voltage detection
- Development is supported with an evaluation board and an exclusive programmer for ML22Q573
- 4-channel mixing function enabling simultaneous playback
- CPU I/F: Clock synchronous serial interface
Applications
Specification
| Parameter | Specification |
|---|---|
| Part number | ML22Q573/ML2257x series |
| Speech synthesis method | HQ-ADPCM 8-bit nonlinear PCM 8-bit PCM, 16-bit PCM (Can be specified for each phrase) |
| Sampling frequency Fosc=4.096MHz |
6.4k, 8.0k, 12.0k, 12.8k, 16.0k, 24.0k, 25.6k, 32.0k, 48.0kHz (Can be specified for each phrase) |
| Speaker amplifier output | 1.0W (8Ω, 5V) |
| Number of playback phrases | Max. 1,024 phrases |
| Other functions | Volume control function, Repeat function |
| Operating power supply voltage | +2.7V to +5.5V |
| Operating temperature | -40°C to +105°C |
| 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.
Block Diagram
ML22Q573-NNN
ML2257x-xxx
Application Circuit Examples
At using internal speaker amplifier (speaker output)
At using external speaker amplifier (line output)
