ISD4003-05MSY

Overview

The ISD4003-05MSY is a single-chip voice record/playback device from the ISD4003 ChipCorder series, manufactured by Nuvoton Technology Corporation. It provides 5 minutes of recording duration at a sampling frequency of 6.4 kHz with a typical filter pass band of 2.7 kHz. The component operates on a single 3-volt supply and features low-power consumption, including a standby current of 1 µA. It utilizes an SPI or Microwire serial interface for microcontroller control and includes an on-chip oscillator, anti-aliasing filter, smoothing filter, AutoMute feature, audio amplifier, and high-density multilevel Flash memory array.

Feature Summary

• Single-chip solution integrating analog speech storage directly into non-volatile Flash memory without digitization or compression.
• Supports fully addressable multiple message handling via SPI or Microwire serial interface with interrupt capabilities.
• Includes AutoMute feature for background noise attenuation during playback silence periods.
• Offers industrial temperature range operation (-40°C to +85°C) in packaged form.

Applications

• Cellular phones and portable consumer electronics requiring voice messaging
• Microprocessor-based systems needing simple voice warning or announcement functions
• Automotive lane departure warning systems utilizing voice alerts

Procurement Notes

Verify the specific ordering suffix 'MSY' against the manufacturer's official datasheet to confirm package type, temperature grade, and tape/reel specifications. Ensure the selected variant matches the required industrial operating temperature range and packaging format for your design.

Selection Notes

Select the ISD4003-05MSY when a 5-minute recording duration at 6.4 kHz sampling rate is required. Consider the external clock requirements if precise timing stability beyond the internal oscillator tolerance is needed for industrial applications. Verify power supply decoupling and ground separation requirements for optimal audio performance.

Part Context

The ISD4003 series comprises 4-, 5-, 6-, and 8-minute duration variants designed for 3-volt portable products. The ISD4003-05MSY specifically offers 5 minutes of storage at 6.4 kHz. The series uses patented multilevel storage technology for direct analog voice storage, eliminating the need for algorithm development.

Replacement Considerations

ISD4003-04MSY (4 min), ISD4003-06MSY (6 min), ISD4003-08MSY (8 min). These variants share identical pinouts and interfaces but differ in duration and sampling rates.

FAQ

What is the recommended external clock frequency for the ISD4003-05M?

For the ISD4003-05M variant, the recommended external clock frequency applied to the XCLK pin is 819.2 kHz to maintain the specified 6.4 kHz sampling rate.

How does the AutoMute feature function?

The AutoMute feature minimizes background noise during playback silence by applying 6 dB of attenuation. It uses a peak detector circuit connected to the AM CAP pin to compare signal amplitude against an internal threshold.

What are the input voltage limits for ANA IN+ and ANA IN-?

In single-ended mode, the maximum input signal for ANA IN+ is 32 mVp-p. In differential mode, the maximum input signal for both ANA IN+ and ANA IN- is 16 mVp-p for optimal signal quality.