ISD4003-04MEY

Overview

The ISD4003-04MEY is a single-chip voice record/playback device from the Nuvoton ISD4003 ChipCorder series, offering an 8-minute recording duration. It operates on a single 2.7V to 3.3V supply with typical operating currents of 15mA during playback and 25mA during recording. The device features a sampling frequency of 8.0 kHz and a filter passband of 3.4 kHz. It utilizes multilevel Flash memory for non-volatile storage, supporting 100-year retention and 100,000 record cycles. Control is managed via an SPI or Microwire interface, and it includes an AutoMute feature for noise attenuation.

Feature Summary

• Direct analog storage technology preserves natural voice quality without digital compression artifacts.
• Integrated AutoMute function attenuates background noise during silence periods.
• Fully addressable memory architecture allows for multiple message handling via microcontroller interfaces.
• Zero-power message storage ensures data retention without continuous power supply.

Applications

• Portable consumer electronics requiring voice messaging capabilities
• Industrial control systems with speech feedback requirements
• Automotive warning systems for lane departure or safety alerts

Procurement Notes

Verify the specific suffix 'EY' against the manufacturer's official ordering guide to confirm package type and temperature range. Ensure compatibility with existing SPI bus configurations and voltage levels before integration. Check for end-of-life status or alternative recommendations from Nuvoton Technology Corporation.

Selection Notes

Select this model when an 8-minute duration at 8.0 kHz sampling rate is required. Compare with ISD4003-05M, -06M, or -08M variants if different trade-offs between audio fidelity and recording time are needed. Confirm that the industrial temperature range (-40°C to +85°C) meets environmental specifications.

Part Context

The ISD4003 series represents Nuvoton's evolution of direct analog storage technology, succeeding earlier ISD4000/4002 generations. It integrates high-density multilevel Flash memory, eliminating the need for external codecs or compression algorithms. This series is designed for applications demanding high-quality voice reproduction in compact, low-power form factors.

Replacement Considerations

ISD4003-04MPY and ISD4003-04MSI are pin-compatible alternatives within the same series offering identical electrical characteristics but potentially different package types or temperature ratings. Verify mechanical dimensions and thermal performance when substituting.

FAQ

How does the AutoMute feature affect audio output?

The AutoMute feature provides approximately 6 dB of attenuation during periods of silence to minimize background noise. It can be disabled by connecting the AM CAP pin directly to VCCA.

What is the maximum input signal level for optimal recording?

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

Can the device operate without an external clock?

Yes, the ISD4003-04MEY includes an internal oscillator centered at 8.0 kHz. However, for higher precision, an external clock of 1024 kHz can be applied to the XCLK pin.