ISD4003-08MPY

Overview

The ISD4003-08MPY is a single-chip voice record/playback device from the ISD4003 ChipCorder series by Nuvoton Technology Corporation. It provides an 8-minute recording duration with a sampling frequency of 4 kHz and a filter pass band of 1.7 kHz. The device operates on a single 2.7 V to 3.3 V supply, drawing typical operating currents of 15 mA during playback and 25 mA during recording, with a standby current of 1 µA. It features an internal/external oscillator, AutoMute functionality, and SPI/Microwire interface control. The component is housed in a 28-pin SOIC package and supports industrial temperature ranges from -40°C to +85°C.

Feature Summary

• Direct analog storage using multilevel Flash memory for high-quality natural voice reproduction without digitization or compression algorithms.
• Integrated AutoMute feature that attenuates background noise by 6 dB during silence periods to improve audio clarity.
• Fully addressable architecture allowing multiple message handling via SPI or Microwire serial interfaces with interrupt support.

Applications

• Portable consumer electronics requiring low-power voice messaging
• Industrial control systems needing non-volatile voice alerts
• Automotive applications utilizing robust industrial temperature range components

Procurement Notes

Verify the specific suffix 'MPY' against official ordering information to confirm package type and temperature grade. Ensure compatibility with existing SPI protocols and power supply constraints before integration. Check for end-of-life status or alternative sourcing options if long-term availability is required.

Selection Notes

Select this model for applications requiring up to 8 minutes of continuous voice recording at 4 kHz sampling rate. Consider the 28-SOIC package dimensions for PCB layout. Evaluate the need for external clocking via XCLK pin if precise timing stability beyond internal oscillator tolerances is necessary for the target environment.

Part Context

The ISD4003-08MPY belongs to the ISD4003 series, which includes variants with 4, 5, 6, and 8-minute durations. These devices share common architectural features such as the multilevel Flash memory array and SPI interface but differ in sampling rates and filter pass bands corresponding to their respective recording times.

Replacement Considerations

Other models within the ISD4003 series (e.g., ISD4003-04M, ISD4003-05M, ISD4003-06M) offer shorter durations but maintain similar interface and electrical characteristics. Verify pinout and software compatibility when substituting with different duration variants.

FAQ

What is the maximum input signal level for optimal recording quality?

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

How does the AutoMute feature function?

The AutoMute feature minimizes background noise by applying 6 dB attenuation when no audio signal is detected. It can be disabled by connecting the AM CAP pin directly to VCCA.

Can the device operate with an external clock source?

Yes, the XCLK pin allows for external clock input to achieve greater precision than the internal oscillator, particularly useful in industrial temperature ranges.