ISD4003-05MP

Overview

The ISD4003-05MP is a single-chip voice record/playback device from the ISD4003 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 device operates on a single 3-volt supply (2.7V to 3.3V) and features low-power consumption, including a standby current of 1 µA typical. It utilizes high-density multilevel Flash memory for non-volatile storage, supporting 100K record cycles and 100-year message retention. Control is managed via an SPI or Microwire serial interface, and it includes an AutoMute feature for noise attenuation.

Feature Summary

• Single-chip solution with direct analog storage in non-volatile Flash memory for high-quality voice reproduction without digitization or compression algorithms.
• Integrated AutoMute feature that attenuates background noise during silence periods to improve audio clarity.
• Fully addressable multiple-message capability controlled through a standard SPI or Microwire serial interface.
• On-chip oscillator with optional external clock input for precise timing control.

Applications

• Cellular phones and portable communication devices
• Microcontroller-based messaging systems
• Voice annotation and recording modules

Procurement Notes

Verify the specific suffix 'MP' against the manufacturer's official ordering guide to confirm package type and temperature range, as suffixes define physical attributes. Confirm availability status as older series components may have limited stock or end-of-life implications. Ensure the required voltage supply matches the 2.7V to 3.3V specification before integration.

Selection Notes

Select this model when a 5-minute recording duration is required. Compare sampling rates: 6.4 kHz offers a balance between quality and duration compared to 8.0 kHz (4 min) or 4.0 kHz (8 min). Ensure the system supports SPI/Microwire interfaces. Verify that the operating temperature range meets the application requirements, as commercial packaged units typically operate from 0°C to +70°C.

Part Context

The ISD4003-05MP belongs to the ISD4003 ChipCorder series, which includes variants with 4, 6, and 8-minute durations. These devices are designed for portable applications requiring simple voice recording and playback. The series uses patented multilevel storage technology to store analog speech samples directly in Flash memory, distinguishing it from digital codec-based solutions.

Replacement Considerations

Other models in the ISD4003 series, such as ISD4003-04MP, ISD4003-06MP, or ISD4003-08MP, share the same pinout and interface but offer different recording durations and sampling frequencies. Substitution requires verifying that the alternative duration and audio quality meet the system requirements.

FAQ

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

In single-ended mode, the maximum input signal should be 32 mVp-p. In differential mode, the maximum input signal for both ANA IN+ and ANA IN- pins should be 16 mVp-p.

How does the AutoMute feature function?

The AutoMute feature minimizes background noise during 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.

Can the device be used for playback-only applications?

Yes, the ISD4003 series is suitable for playback-only applications where messages are controlled via the SPI port. Messages can be pre-recorded and duplicated using a programmer.