ISD4004-10MS

Overview

The ISD4004-10MS is a single-chip voice record/playback solution from the ISD4004 ChipCorder series, designed for 10-minute messaging applications. It operates on a single 3-volt supply and features low-power consumption with typical operating currents of 15 mA during playback and 25 mA during recording. The device utilizes Nuvoton’s patented multilevel storage technology to store analog speech samples directly onto an on-chip Flash memory array without digitization or compression. It supports SPI or Microwire serial interfaces for microcontroller control and includes built-in anti-aliasing and smoothing filters.

Feature Summary

• Direct analog storage of voice signals into non-volatile Flash memory for high-quality natural reproduction
• Integrated AutoMute feature for background noise attenuation during silence periods
• Microcontroller-compatible SPI or Microwire serial interface for address and control operations
• On-chip oscillator with optional external clock input via XCLK pin for precise timing

Applications

• Cellular phones and portable communication devices
• 8-to-16 minute messaging systems
• Voice recording modules for consumer electronics
• Microprocessor-based audio control systems

Procurement Notes

Verify the specific suffix 'MS' against the manufacturer's ordering information to confirm package type and temperature grade. The datasheet lists packaged units in SOIC and PDIP options with commercial and industrial temperature ranges. Ensure the selected variant matches the required environmental specifications and physical footprint for the target design.

Selection Notes

Select this model for applications requiring exactly 10 minutes of recording duration at a 6.4 kHz sampling rate. Consider the ISD4004-08M, -12M, or -16M variants if different durations are needed. Evaluate power requirements carefully, as standby current is 1 µA while active modes draw significantly more. Ensure the host system provides a stable 3V supply and compatible SPI interface.

Part Context

The ISD4004 series represents Nuvoton’s ChipCorder technology, enabling direct analog storage in Flash memory. This approach eliminates the need for complex DSP algorithms typically required by digital voice solutions. The series supports multiple durations (8, 10, 12, 16 minutes) and offers high reliability with 100-year retention and 100K record cycles.

Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided documentation. Designers should consult Nuvoton’s official resources for potential cross-references or newer generation replacements within the ISD series.