ISD4004-16MPY

Overview

The ISD4004-16MPY is a single-chip voice record/playback device from the ISD4004 series, manufactured by Nuvoton Technology Corporation. It utilizes patented multilevel Flash memory to store analog audio signals directly without digitization or compression. This specific model provides a recording and playback duration of 16 minutes at a sampling frequency of 4.0 kHz. The device operates on a single 3-volt supply and features an SPI interface for microcontroller control. Key electrical parameters include a typical standby current of 1 µA, operating currents of 15 mA during playback and 25 mA during recording, and a non-volatile message retention of up to 100 years with 100,000 record cycles.

Feature Summary

• Direct analog storage technology preserves natural voice quality without digital compression artifacts.
• Integrated AutoMute feature attenuates background noise during silence periods.
• Fully addressable memory architecture supports multiple distinct messages via SPI commands.
• Low-power design includes power-down modes suitable for battery-operated portable applications.

Applications

• Portable cellular phones and mobile communication devices requiring voice prompts.
• Industrial automation systems needing localized speech feedback or status announcements.
• Consumer electronics such as electronic greeting cards and educational toys.
• Security systems utilizing voice-activated alerts or recorded warnings.

Procurement Notes

Verify the exact suffix 'MPY' against the manufacturer's official ordering guide to confirm package type and temperature grade. Ensure the source document explicitly lists this suffix variant. Confirm that the component meets RoHS compliance standards if required for your assembly process. Cross-reference the datasheet revision date to ensure technical specifications have not changed in newer releases.

Selection Notes

Select this model when a 16-minute duration is required, accepting the lower 4.0 kHz sampling rate which results in a reduced filter passband of 1.7 kHz. Consider alternative series members like the ISD4004-08M if higher audio fidelity (8.0 kHz) is prioritized over maximum recording time. Ensure the system design accommodates the separate analog and digital ground requirements specified in the pin configuration.

Part Context

The ISD4004 series represents Nuvoton's ChipCorder technology, designed to replace traditional magnetic tape or complex digital audio solutions. It integrates anti-aliasing filters, smoothing filters, and an audio amplifier on a single CMOS die. The series offers varying durations from 8 to 16 minutes, allowing designers to balance audio quality against storage capacity based on application needs.

Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation. Designers should consult Nuvoton's official replacement guides or contact the manufacturer directly for qualified alternatives if supply constraints arise.

FAQ

How does the ISD4004-16MPY handle audio input?

It accepts analog audio signals via the ANA IN+ and ANA IN- pins, supporting both single-ended (max 32 mVp-p) and differential input modes for optimal signal quality.

What is the function of the RAC pin?

The Row Address Clock (RAC) pin outputs a signal indicating the end of a memory row, which can be used for message management and addressing control during record or playback operations.

Can the ISD4004-16MPY operate without a microcontroller?

No, the device requires a master controller to generate the SPI clock (SCLK) and send command opcodes via MOSI to initiate and control recording or playback functions.