ISD2361YYI

Overview

The ISD2361YYI is a playback-only digital voice IC from Nuvoton's ChipCorder family, utilizing flash storage for audio retention. It features built-in 2Mbit non-volatile memory and supports external NOR serial flash expansion up to 2Gbit. The device integrates a Class D speaker driver capable of delivering up to 1.5W output into a 4Ω load at 5.5V. It operates on a supply voltage ranging from 2.4V to 5.5V and supports sampling frequencies from 4kHz to 32kHz. Audio compression includes µ-Law, Differential µ-Law, PCM, and Enhanced ADPCM formats. The component provides three concurrent playback channels and manages audio via SPI interface or GPIO triggers.

Feature Summary

• Supports external NOR serial flash expansion for extended audio duration
• Integrates a Class D PWM speaker driver with high power efficiency
• Enables concurrent playback across three independent audio channels
• Offers flexible control through SPI commands or standalone GPIO triggers

Applications

• Voice prompts in industrial automation systems
• Audio feedback modules for consumer appliances
• Safety warning announcements in transportation equipment
• Interactive voice response units in telecommunications

Procurement Notes

Verify the specific ordering suffix to confirm package type and tape/reel configuration. Ensure the design accounts for the QFN-32 exposed pad connection to VSSD for thermal management. Confirm that the application image size fits within the internal flash or requires compatible external NOR flash support.

Selection Notes

Select this model when external memory expansion beyond 2Mbit is required. Compare against the ISD2361SYI if external flash is unnecessary to simplify the bill of materials. Consider the SOP-16 package option if board space constraints favor surface-mount technology over the QFN footprint.

Part Context

This component belongs to the ISD2361 series, which differentiates between the YYI and SYI variants based on external flash capability. The YYI variant specifically enables access to larger address spaces via external memory interfaces, distinguishing it from the internal-flash-only SYI version within the same product line.

Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation.