ISD4004-08MSY

Overview

The ISD4004-08MSY is a single-chip voice record/playback device from Nuvoton's ISD4004 series, designed for 8-minute messaging applications. It operates on a single 3V supply and utilizes multilevel Flash memory to store analog speech samples directly without digitization or compression. The device features an on-chip oscillator, anti-aliasing filter, smoothing filter, AutoMute feature, and audio amplifier. Control is managed via a Serial Peripheral Interface (SPI) or Microwire interface. Key electrical parameters include a typical operating current of 15 mA during playback and 25 mA during recording, with a standby current of 1 µA. The sampling frequency is 8.0 kHz, providing a typical filter passband of 3.4 kHz.

Feature Summary

• Direct analog storage technology preserves natural voice quality by storing signals in their original form within non-volatile Flash memory.
• Integrated AutoMute feature attenuates background noise by 6 dB during silence periods to improve audio clarity.
• Fully addressable memory architecture allows for multiple message handling and management through SPI commands.
• Low-power design includes a power-down mode that reduces standby current to approximately 1 µA.

Applications

• Portable consumer electronics requiring high-quality voice prompts
• Microcontroller-based systems needing non-volatile voice storage
• Industrial control panels with automated voice feedback

Procurement Notes

Verify the specific suffix 'SY' against official Nuvoton documentation to confirm package type and temperature grade. Ensure the ordering code matches the required industrial or commercial specifications. Confirm availability of the SOIC or PDIP package variant as listed in the latest datasheet revision. Cross-reference the part number with authorized distributors to ensure authenticity and compliance with RoHS standards.

Selection Notes

Select this component when an 8-minute recording duration at 8.0 kHz sampling rate is required. Choose the industrial temperature grade (-40°C to +85°C) if the application operates in harsh environments. Ensure the host microcontroller supports SPI or Microwire interfaces for control. Consider the external clock requirements if higher precision than the internal oscillator allows.

Part Context

The ISD4004 series represents Nuvoton's ChipCorder technology, offering a complete solution for voice messaging without external components. It replaces traditional magnetic storage with solid-state Flash memory, providing superior durability and retention. The series includes variants with different durations, such as 10, 12, and 16 minutes, catering to various application needs while maintaining consistent interface and functionality.

Replacement Considerations

ISD4004-10M, ISD4004-12M, ISD4004-16M