ISD4004-16MSIR

Overview

The ISD4004-16MSIR is a single-chip voice record/playback device from Nuvoton's ISD ChipCorder series, designed for 16-minute messaging applications. It operates on a single 3V supply and utilizes direct analog storage in high-density multilevel Flash memory to preserve natural voice quality without digital compression. The device supports an SPI or Microwire serial interface for microcontroller control, featuring addressable message handling and low-power standby modes. Key electrical parameters include a 4.0 kHz sampling frequency, 25 mA typical recording current, and 1 µA standby current.

Feature Summary

• Direct analog storage technology preserves natural voice reproduction without digitization or compression artifacts.
• Integrated AutoMute feature attenuates background noise during silence periods to improve audio clarity.
• Fully addressable memory architecture allows precise control over multiple messages via SPI commands.
• Non-volatile Flash storage retains data for up to 100 years with support for 100,000 re-record cycles.

Applications

• Portable consumer electronics requiring extended voice prompts
• Microcontroller-based automated announcement systems
• Low-power voice messaging modules

Procurement Notes

Verify the specific suffix MSIR corresponds to the required industrial temperature range (-40°C to +85°C) and SOIC package variant. Confirm that the 16-minute duration aligns with system timing requirements, as this model operates at a fixed 4.0 kHz sampling rate. Ensure compatibility with the host controller's SPI voltage levels and pin configuration before integration.

Selection Notes

Select this component when long-duration voice storage (16 minutes) is required within a single chip footprint. The 4.0 kHz sampling rate offers extended time but reduced bandwidth compared to higher-speed variants. Consider the industrial temperature rating if the application environment exceeds standard commercial limits. Verify that the host system can manage the SPI protocol overhead for addressable playback.

Part Context

This part belongs to the ISD4004 series, which includes variants with 8, 10, 12, and 16-minute durations. The series is characterized by its use of patented multilevel Flash storage technology, distinguishing it from PWM-based voice chips. It serves as a drop-in replacement for older ISD solutions in portable devices where power efficiency and voice fidelity are prioritized.

Replacement Considerations

WT2003HP8-32N is a documented alternative for ISD4004 voice record/playback applications. Verify interface compatibility and memory architecture differences when substituting.