ML22Q664-NNNTBZ0BX

Specialized ICS Overview

The ML22Q664-NNNTBZ0BX is a speech synthesis LSI from ROHM Semiconductor, part of the ML22Q6xx series. It features built-in Flash memory for storing voice data, supporting applications requiring extended playback times such as voice guidance systems. The device integrates high-quality audio processing capabilities, including HQ-ADPCM decoding, a 16-bit D/A converter, and a low-pass filter. It also includes a built-in 1.0W mono speaker amplifier capable of driving speakers directly, allowing for a compact single-chip solution for voice output functions.

Specialized ICS Feature Summary

• Built-in Flash memory (4Mbit to 32Mbit range) for voice code storage
• Integrated 1.0W mono speaker amplifier (AB-class or D-class)
• High-quality audio processing with HQ-ADPCM and 16-bit D/A converter
• Supports MCU-based Flash rewriting via CPU interface

Specialized ICS Applications

• Voice operation guidance systems
• Automotive infotainment and navigation announcements
• Industrial equipment voice prompts
• Consumer electronics with voice feedback requirements

Specialized ICS Procurement Notes

Verify the specific Flash capacity and package variant against the official datasheet, as the ML22Q664 designation may correspond to specific memory sizes within the ML22Q6xx family. Confirm moisture sensitivity level and reflow soldering profiles prior to assembly. Ensure the ordering suffix matches the required tape and reel or cut tape packaging format specified in the procurement order.

Specialized ICS Selection Notes

Select this component when long-duration voice playback is required without external memory chips. Compare internal Flash size against the total voice data volume needed. Verify that the integrated 1.0W amplifier meets the power requirements for the target speaker impedance. Check if the I2C or clock-synchronous serial interface aligns with the host microcontroller's available communication ports.

Specialized ICS Part Context

This part belongs to the ROHM ML22Q6xx series of speech synthesis LSIs. Similar models include ML22Q663, ML22Q665, and ML22Q666, which vary primarily in internal Flash capacity and specific feature sets. These devices are designed to replace discrete audio codec and amplifier combinations, simplifying PCB layout and reducing component count in voice-enabled products.

Specialized ICS Replacement Considerations

Direct replacements within the same series include ML22Q663, ML22Q665, and ML22Q666. When substituting, verify that the alternative part has sufficient internal Flash memory for the application's voice data. Ensure pin compatibility and software register configurations remain consistent across the selected model.