ISD4003-04MSIR

Overview

The ISD4003-04MSIR is a single-chip voice record/playback device from the ISD4003 series, manufactured by Nuvoton Technology Corporation. It provides 4 minutes of recording duration at an 8.0 kHz sampling frequency with a typical filter pass band of 3.4 kHz. The component operates on a single 2.7 V to 3.3 V supply and features SPI or Microwire serial interface for microcontroller control. It utilizes high-density multilevel Flash memory for non-volatile storage, supporting 100K record cycles and 100-year retention. The device is housed in a 28-SOIC package.

Feature Summary

• Direct analog storage technology preserves natural voice quality without digitization or compression algorithms.
• Integrated AutoMute feature attenuates background noise during silence periods.
• Fully addressable multiple-message capability managed via SPI serial interface.
• Zero-power message storage ensures data retention without continuous power.

Applications

• Portable cellular phone messaging systems
• Microcontroller-based voice annotation modules
• Industrial equipment status reporting
• Consumer product voice prompts

Procurement Notes

Verify the specific suffix MSIR corresponds to the 28-SOIC package and commercial temperature range (0°C to +70°C). Confirm that the ordering code matches the 4-minute duration variant. Check for RoHS compliance status as indicated in manufacturer documentation. Ensure the source document explicitly lists this part number to avoid substitution errors with similar duration models.

Selection Notes

Select this model when a fixed 4-minute recording time is required. Choose based on the 8.0 kHz sampling rate which offers higher audio fidelity compared to longer duration variants. Ensure the system design supports the 2.7 V to 3.3 V operating voltage. Verify that the 28-SOIC surface mount package fits the PCB layout constraints.

Part Context

The ISD4003-04MSIR belongs to the ISD4003 ChipCorder series, which includes 4, 5, 6, and 8-minute duration variants. These devices share a common architecture utilizing Winbond's multilevel Flash memory technology. The series is designed for low-power, single-supply applications requiring direct analog storage capabilities.

Replacement Considerations

ISD4003-05MSIR offers 5 minutes duration at 6.4 kHz. ISD4003-08MEIR provides 8 minutes duration in a TSOP package. Substitution requires verifying compatible voltage levels and interface protocols.

FAQ

How does the ISD4003-04MSIR handle background noise?

It utilizes an integrated AutoMute feature that detects silence and applies 6 dB of attenuation to minimize background noise during playback.

What is the maximum input signal level for optimal recording?

In single-ended mode, the maximum input signal should be 32 mV peak-to-peak. In differential mode, it is 16 mV peak-to-peak.

Can the internal clock be replaced with an external one?

Yes, an external clock can be applied to the XCLK pin for greater precision, though the internal oscillator is factory-calibrated to ±1% accuracy.