ISD4004-16MP

Overview

The ISD4004-16MP is a single-chip voice record/playback solution from the ISD4004 ChipCorder series, designed for 16-minute messaging applications. It operates on a single 3V supply and utilizes Nuvoton’s patented multilevel Flash memory to store analog speech samples directly without digitization or compression. The device features an on-chip oscillator, anti-aliasing filter, smoothing filter, audio amplifier, and AutoMute feature. Control and addressing are managed via a Serial Peripheral Interface (SPI) or Microwire interface. Key electrical parameters include a typical operating current of 25 mA during recording and 15 mA during playback, with a standby current of 1 µA. It supports a sampling rate of 4.0 kHz and offers non-volatile storage with 100K record cycles and 100-year retention.

Feature Summary

• Direct analog storage technology preserves natural voice quality by storing signals directly in Flash memory without digital conversion.
• Integrated AutoMute feature minimizes background noise attenuation during silence periods.
• Fully addressable memory architecture allows handling of multiple messages through SPI control.
• Low-power design includes power-down capabilities and minimal standby current consumption.

Applications

• Cellular phones and portable communication devices
• Single-chip solid-state record/playback systems
• Microprocessor-based messaging applications

Procurement Notes

Verify the specific suffix '16MP' against the official datasheet to confirm the 16-minute duration variant and industrial temperature range availability. Ensure the ordering code matches the required package type, such as SOIC or PDIP, as listed in the manufacturer's ordering information section. Cross-reference the revision history for any updates to electrical characteristics or pin configurations before finalizing procurement.

Selection Notes

Select the ISD4004-16MP when a 16-minute recording duration at a 4.0 kHz sampling rate is required. Consider this component for designs needing direct analog storage to maintain high-fidelity voice reproduction without complex DSP algorithms. Evaluate the SPI interface compatibility with the host microcontroller and ensure the system can support the 3V supply voltage and associated current requirements for both record and playback modes.

Part Context

The ISD4004 series belongs to Nuvoton’s ChipCorder family, which specializes in single-chip voice recording solutions using proprietary multilevel Flash technology. This series eliminates the need for external codecs or compression algorithms by storing analog waveforms directly. The ISD4004-16MP represents the longest duration variant in the standard lineup, offering extended message storage capabilities compared to the 8, 10, and 12-minute models.

Replacement Considerations

Public confirmed substitute part numbers: None identified in verified documentation.

FAQ

How does the ISD4004-16MP handle audio input?

The device accepts analog audio signals via the ANA IN+ and ANA IN- pins, supporting both single-ended and differential input modes for optimal signal quality.

What is the function of the RAC pin?

The Row Address Clock (RAC) pin provides a signal indicating the end of a memory row, which can be used for message management techniques and tracking memory position during operations.

Can the ISD4004-16MP be re-recorded?

Yes, the device utilizes non-volatile Flash memory that typically supports up to 100,000 record cycles while retaining messages for up to 100 years without power.